/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Stephan Herrmann <stephan@cs.tu-berlin.de> - Contributions for
* Bug 328281 - visibility leaks not detected when analyzing unused field in private class
* Bug 300576 - NPE Computing type hierarchy when compliance doesn't match libraries
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.lookup;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.AbstractVariableDeclaration;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.QualifiedAllocationExpression;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.ast.TypeParameter;
import org.eclipse.jdt.internal.compiler.ast.TypeReference;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.env.AccessRestriction;
import org.eclipse.jdt.internal.compiler.problem.AbortCompilation;
import org.eclipse.jdt.internal.compiler.problem.ProblemReporter;
import org.eclipse.jdt.internal.compiler.util.HashtableOfObject;
public class ClassScope extends Scope {
public TypeDeclaration referenceContext;
public TypeReference superTypeReference;
java.util.ArrayList deferredBoundChecks;
public ClassScope(Scope parent, TypeDeclaration context) {
super(Scope.CLASS_SCOPE, parent);
this.referenceContext = context;
this.deferredBoundChecks = null; // initialized if required
}
void buildAnonymousTypeBinding(SourceTypeBinding enclosingType, ReferenceBinding supertype) {
LocalTypeBinding anonymousType = buildLocalType(enclosingType, enclosingType.fPackage);
anonymousType.modifiers |= ExtraCompilerModifiers.AccLocallyUsed; // tag all anonymous types as used locally
if (supertype.isInterface()) {
anonymousType.superclass = getJavaLangObject();
anonymousType.superInterfaces = new ReferenceBinding[] { supertype };
TypeReference typeReference = this.referenceContext.allocation.type;
if (typeReference != null) {
if ((supertype.tagBits & TagBits.HasDirectWildcard) != 0) {
problemReporter().superTypeCannotUseWildcard(anonymousType, typeReference, supertype);
anonymousType.tagBits |= TagBits.HierarchyHasProblems;
anonymousType.superInterfaces = Binding.NO_SUPERINTERFACES;
}
}
} else {
anonymousType.superclass = supertype;
anonymousType.superInterfaces = Binding.NO_SUPERINTERFACES;
TypeReference typeReference = this.referenceContext.allocation.type;
if (typeReference != null) { // no check for enum constant body
if (supertype.erasure().id == TypeIds.T_JavaLangEnum) {
problemReporter().cannotExtendEnum(anonymousType, typeReference, supertype);
anonymousType.tagBits |= TagBits.HierarchyHasProblems;
anonymousType.superclass = getJavaLangObject();
} else if (supertype.isFinal()) {
problemReporter().anonymousClassCannotExtendFinalClass(typeReference, supertype);
anonymousType.tagBits |= TagBits.HierarchyHasProblems;
anonymousType.superclass = getJavaLangObject();
} else if ((supertype.tagBits & TagBits.HasDirectWildcard) != 0) {
problemReporter().superTypeCannotUseWildcard(anonymousType, typeReference, supertype);
anonymousType.tagBits |= TagBits.HierarchyHasProblems;
anonymousType.superclass = getJavaLangObject();
}
}
}
connectMemberTypes();
buildFieldsAndMethods();
anonymousType.faultInTypesForFieldsAndMethods();
anonymousType.verifyMethods(environment().methodVerifier());
}
void buildFields() {
SourceTypeBinding sourceType = this.referenceContext.binding;
if (sourceType.areFieldsInitialized()) return;
if (this.referenceContext.fields == null) {
sourceType.setFields(Binding.NO_FIELDS);
return;
}
// count the number of fields vs. initializers
FieldDeclaration[] fields = this.referenceContext.fields;
int size = fields.length;
int count = 0;
for (int i = 0; i < size; i++) {
switch (fields[i].getKind()) {
case AbstractVariableDeclaration.FIELD:
case AbstractVariableDeclaration.ENUM_CONSTANT:
count++;
}
}
// iterate the field declarations to create the bindings, lose all duplicates
FieldBinding[] fieldBindings = new FieldBinding[count];
HashtableOfObject knownFieldNames = new HashtableOfObject(count);
count = 0;
for (int i = 0; i < size; i++) {
FieldDeclaration field = fields[i];
if (field.getKind() == AbstractVariableDeclaration.INITIALIZER) {
// We used to report an error for initializers declared inside interfaces, but
// now this error reporting is moved into the parser itself. See https://bugs.eclipse.org/bugs/show_bug.cgi?id=212713
} else {
FieldBinding fieldBinding = new FieldBinding(field, null, field.modifiers | ExtraCompilerModifiers.AccUnresolved, sourceType);
fieldBinding.id = count;
// field's type will be resolved when needed for top level types
checkAndSetModifiersForField(fieldBinding, field);
if (knownFieldNames.containsKey(field.name)) {
FieldBinding previousBinding = (FieldBinding) knownFieldNames.get(field.name);
if (previousBinding != null) {
for (int f = 0; f < i; f++) {
FieldDeclaration previousField = fields[f];
if (previousField.binding == previousBinding) {
problemReporter().duplicateFieldInType(sourceType, previousField);
break;
}
}
}
knownFieldNames.put(field.name, null); // ensure that the duplicate field is found & removed
problemReporter().duplicateFieldInType(sourceType, field);
field.binding = null;
} else {
knownFieldNames.put(field.name, fieldBinding);
// remember that we have seen a field with this name
fieldBindings[count++] = fieldBinding;
}
}
}
// remove duplicate fields
if (count != fieldBindings.length)
System.arraycopy(fieldBindings, 0, fieldBindings = new FieldBinding[count], 0, count);
sourceType.tagBits &= ~(TagBits.AreFieldsSorted|TagBits.AreFieldsComplete); // in case some static imports reached already into this type
sourceType.setFields(fieldBindings);
}
void buildFieldsAndMethods() {
buildFields();
buildMethods();
SourceTypeBinding sourceType = this.referenceContext.binding;
if (!sourceType.isPrivate() && sourceType.superclass instanceof SourceTypeBinding && sourceType.superclass.isPrivate())
((SourceTypeBinding) sourceType.superclass).tagIndirectlyAccessibleMembers();
if (sourceType.isMemberType() && !sourceType.isLocalType())
((MemberTypeBinding) sourceType).checkSyntheticArgsAndFields();
ReferenceBinding[] memberTypes = sourceType.memberTypes;
for (int i = 0, length = memberTypes.length; i < length; i++)
((SourceTypeBinding) memberTypes[i]).scope.buildFieldsAndMethods();
}
private LocalTypeBinding buildLocalType(SourceTypeBinding enclosingType, PackageBinding packageBinding) {
this.referenceContext.scope = this;
this.referenceContext.staticInitializerScope = new MethodScope(this, this.referenceContext, true);
this.referenceContext.initializerScope = new MethodScope(this, this.referenceContext, false);
// build the binding or the local type
LocalTypeBinding localType = new LocalTypeBinding(this, enclosingType, innermostSwitchCase());
this.referenceContext.binding = localType;
checkAndSetModifiers();
buildTypeVariables();
// Look at member types
ReferenceBinding[] memberTypeBindings = Binding.NO_MEMBER_TYPES;
if (this.referenceContext.memberTypes != null) {
int size = this.referenceContext.memberTypes.length;
memberTypeBindings = new ReferenceBinding[size];
int count = 0;
nextMember : for (int i = 0; i < size; i++) {
TypeDeclaration memberContext = this.referenceContext.memberTypes[i];
switch(TypeDeclaration.kind(memberContext.modifiers)) {
case TypeDeclaration.INTERFACE_DECL :
case TypeDeclaration.ANNOTATION_TYPE_DECL :
problemReporter().illegalLocalTypeDeclaration(memberContext);
continue nextMember;
}
ReferenceBinding type = localType;
// check that the member does not conflict with an enclosing type
do {
if (CharOperation.equals(type.sourceName, memberContext.name)) {
problemReporter().typeCollidesWithEnclosingType(memberContext);
continue nextMember;
}
type = type.enclosingType();
} while (type != null);
// check the member type does not conflict with another sibling member type
for (int j = 0; j < i; j++) {
if (CharOperation.equals(this.referenceContext.memberTypes[j].name, memberContext.name)) {
problemReporter().duplicateNestedType(memberContext);
continue nextMember;
}
}
ClassScope memberScope = new ClassScope(this, this.referenceContext.memberTypes[i]);
LocalTypeBinding memberBinding = memberScope.buildLocalType(localType, packageBinding);
memberBinding.setAsMemberType();
memberTypeBindings[count++] = memberBinding;
}
if (count != size)
System.arraycopy(memberTypeBindings, 0, memberTypeBindings = new ReferenceBinding[count], 0, count);
}
localType.memberTypes = memberTypeBindings;
return localType;
}
void buildLocalTypeBinding(SourceTypeBinding enclosingType) {
LocalTypeBinding localType = buildLocalType(enclosingType, enclosingType.fPackage);
connectTypeHierarchy();
if (compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5) {
checkParameterizedTypeBounds();
checkParameterizedSuperTypeCollisions();
}
buildFieldsAndMethods();
localType.faultInTypesForFieldsAndMethods();
this.referenceContext.binding.verifyMethods(environment().methodVerifier());
}
private void buildMemberTypes(AccessRestriction accessRestriction) {
SourceTypeBinding sourceType = this.referenceContext.binding;
ReferenceBinding[] memberTypeBindings = Binding.NO_MEMBER_TYPES;
if (this.referenceContext.memberTypes != null) {
int length = this.referenceContext.memberTypes.length;
memberTypeBindings = new ReferenceBinding[length];
int count = 0;
nextMember : for (int i = 0; i < length; i++) {
TypeDeclaration memberContext = this.referenceContext.memberTypes[i];
switch(TypeDeclaration.kind(memberContext.modifiers)) {
case TypeDeclaration.INTERFACE_DECL :
case TypeDeclaration.ANNOTATION_TYPE_DECL :
if (sourceType.isNestedType()
&& sourceType.isClass() // no need to check for enum, since implicitly static
&& !sourceType.isStatic()) {
problemReporter().illegalLocalTypeDeclaration(memberContext);
continue nextMember;
}
break;
}
ReferenceBinding type = sourceType;
// check that the member does not conflict with an enclosing type
do {
if (CharOperation.equals(type.sourceName, memberContext.name)) {
problemReporter().typeCollidesWithEnclosingType(memberContext);
continue nextMember;
}
type = type.enclosingType();
} while (type != null);
// check that the member type does not conflict with another sibling member type
for (int j = 0; j < i; j++) {
if (CharOperation.equals(this.referenceContext.memberTypes[j].name, memberContext.name)) {
problemReporter().duplicateNestedType(memberContext);
continue nextMember;
}
}
ClassScope memberScope = new ClassScope(this, memberContext);
memberTypeBindings[count++] = memberScope.buildType(sourceType, sourceType.fPackage, accessRestriction);
}
if (count != length)
System.arraycopy(memberTypeBindings, 0, memberTypeBindings = new ReferenceBinding[count], 0, count);
}
sourceType.memberTypes = memberTypeBindings;
}
void buildMethods() {
SourceTypeBinding sourceType = this.referenceContext.binding;
if (sourceType.areMethodsInitialized()) return;
boolean isEnum = TypeDeclaration.kind(this.referenceContext.modifiers) == TypeDeclaration.ENUM_DECL;
if (this.referenceContext.methods == null && !isEnum) {
this.referenceContext.binding.setMethods(Binding.NO_METHODS);
return;
}
// iterate the method declarations to create the bindings
AbstractMethodDeclaration[] methods = this.referenceContext.methods;
int size = methods == null ? 0 : methods.length;
// look for <clinit> method
int clinitIndex = -1;
for (int i = 0; i < size; i++) {
if (methods[i].isClinit()) {
clinitIndex = i;
break;
}
}
int count = isEnum ? 2 : 0; // reserve 2 slots for special enum methods: #values() and #valueOf(String)
MethodBinding[] methodBindings = new MethodBinding[(clinitIndex == -1 ? size : size - 1) + count];
// create special methods for enums
if (isEnum) {
methodBindings[0] = sourceType.addSyntheticEnumMethod(TypeConstants.VALUES); // add <EnumType>[] values()
methodBindings[1] = sourceType.addSyntheticEnumMethod(TypeConstants.VALUEOF); // add <EnumType> valueOf()
}
// create bindings for source methods
boolean hasNativeMethods = false;
if (sourceType.isAbstract()) {
for (int i = 0; i < size; i++) {
if (i != clinitIndex) {
MethodScope scope = new MethodScope(this, methods[i], false);
MethodBinding methodBinding = scope.createMethod(methods[i]);
if (methodBinding != null) { // is null if binding could not be created
methodBindings[count++] = methodBinding;
hasNativeMethods = hasNativeMethods || methodBinding.isNative();
}
}
}
} else {
boolean hasAbstractMethods = false;
for (int i = 0; i < size; i++) {
if (i != clinitIndex) {
MethodScope scope = new MethodScope(this, methods[i], false);
MethodBinding methodBinding = scope.createMethod(methods[i]);
if (methodBinding != null) { // is null if binding could not be created
methodBindings[count++] = methodBinding;
hasAbstractMethods = hasAbstractMethods || methodBinding.isAbstract();
hasNativeMethods = hasNativeMethods || methodBinding.isNative();
}
}
}
if (hasAbstractMethods)
problemReporter().abstractMethodInConcreteClass(sourceType);
}
if (count != methodBindings.length)
System.arraycopy(methodBindings, 0, methodBindings = new MethodBinding[count], 0, count);
sourceType.tagBits &= ~(TagBits.AreMethodsSorted|TagBits.AreMethodsComplete); // in case some static imports reached already into this type
sourceType.setMethods(methodBindings);
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=243917, conservatively tag all methods and fields as
// being in use if there is a native method in the class.
if (hasNativeMethods) {
for (int i = 0; i < methodBindings.length; i++) {
methodBindings[i].modifiers |= ExtraCompilerModifiers.AccLocallyUsed;
}
FieldBinding[] fields = sourceType.unResolvedFields(); // https://bugs.eclipse.org/bugs/show_bug.cgi?id=301683
for (int i = 0; i < fields.length; i++) {
fields[i].modifiers |= ExtraCompilerModifiers.AccLocallyUsed;
}
}
}
SourceTypeBinding buildType(SourceTypeBinding enclosingType, PackageBinding packageBinding, AccessRestriction accessRestriction) {
// provide the typeDeclaration with needed scopes
this.referenceContext.scope = this;
this.referenceContext.staticInitializerScope = new MethodScope(this, this.referenceContext, true);
this.referenceContext.initializerScope = new MethodScope(this, this.referenceContext, false);
if (enclosingType == null) {
char[][] className = CharOperation.arrayConcat(packageBinding.compoundName, this.referenceContext.name);
this.referenceContext.binding = new SourceTypeBinding(className, packageBinding, this);
} else {
char[][] className = CharOperation.deepCopy(enclosingType.compoundName);
className[className.length - 1] =
CharOperation.concat(className[className.length - 1], this.referenceContext.name, '$');
ReferenceBinding existingType = packageBinding.getType0(className[className.length - 1]);
if (existingType != null) {
if (existingType instanceof UnresolvedReferenceBinding) {
// its possible that a BinaryType referenced the member type before its enclosing source type was built
// so just replace the unresolved type with a new member type
} else {
// report the error against the parent - its still safe to answer the member type
this.parent.problemReporter().duplicateNestedType(this.referenceContext);
}
}
this.referenceContext.binding = new MemberTypeBinding(className, this, enclosingType);
}
SourceTypeBinding sourceType = this.referenceContext.binding;
environment().setAccessRestriction(sourceType, accessRestriction);
sourceType.fPackage.addType(sourceType);
checkAndSetModifiers();
buildTypeVariables();
buildMemberTypes(accessRestriction);
return sourceType;
}
private void buildTypeVariables() {
SourceTypeBinding sourceType = this.referenceContext.binding;
TypeParameter[] typeParameters = this.referenceContext.typeParameters;
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=324850, If they exist at all, process type parameters irrespective of source level.
if (typeParameters == null || typeParameters.length == 0) {
sourceType.typeVariables = Binding.NO_TYPE_VARIABLES;
return;
}
sourceType.typeVariables = Binding.NO_TYPE_VARIABLES; // safety
if (sourceType.id == TypeIds.T_JavaLangObject) { // handle the case of redefining java.lang.Object up front
problemReporter().objectCannotBeGeneric(this.referenceContext);
return;
}
sourceType.typeVariables = createTypeVariables(typeParameters, sourceType);
sourceType.modifiers |= ExtraCompilerModifiers.AccGenericSignature;
}
private void checkAndSetModifiers() {
SourceTypeBinding sourceType = this.referenceContext.binding;
int modifiers = sourceType.modifiers;
if ((modifiers & ExtraCompilerModifiers.AccAlternateModifierProblem) != 0)
problemReporter().duplicateModifierForType(sourceType);
ReferenceBinding enclosingType = sourceType.enclosingType();
boolean isMemberType = sourceType.isMemberType();
if (isMemberType) {
modifiers |= (enclosingType.modifiers & (ExtraCompilerModifiers.AccGenericSignature|ClassFileConstants.AccStrictfp));
// checks for member types before local types to catch local members
if (enclosingType.isInterface())
modifiers |= ClassFileConstants.AccPublic;
if (sourceType.isEnum()) {
if (!enclosingType.isStatic())
problemReporter().nonStaticContextForEnumMemberType(sourceType);
else
modifiers |= ClassFileConstants.AccStatic;
}
if (enclosingType.isViewedAsDeprecated() && !sourceType.isDeprecated())
modifiers |= ExtraCompilerModifiers.AccDeprecatedImplicitly;
} else if (sourceType.isLocalType()) {
if (sourceType.isEnum()) {
problemReporter().illegalLocalTypeDeclaration(this.referenceContext);
sourceType.modifiers = 0;
return;
}
if (sourceType.isAnonymousType()) {
modifiers |= ClassFileConstants.AccFinal;
// set AccEnum flag for anonymous body of enum constants
if (this.referenceContext.allocation.type == null)
modifiers |= ClassFileConstants.AccEnum;
}
Scope scope = this;
do {
switch (scope.kind) {
case METHOD_SCOPE :
MethodScope methodScope = (MethodScope) scope;
if (methodScope.isInsideInitializer()) {
SourceTypeBinding type = ((TypeDeclaration) methodScope.referenceContext).binding;
// inside field declaration ? check field modifier to see if deprecated
if (methodScope.initializedField != null) {
// currently inside this field initialization
if (methodScope.initializedField.isViewedAsDeprecated() && !sourceType.isDeprecated())
modifiers |= ExtraCompilerModifiers.AccDeprecatedImplicitly;
} else {
if (type.isStrictfp())
modifiers |= ClassFileConstants.AccStrictfp;
if (type.isViewedAsDeprecated() && !sourceType.isDeprecated())
modifiers |= ExtraCompilerModifiers.AccDeprecatedImplicitly;
}
} else {
MethodBinding method = ((AbstractMethodDeclaration) methodScope.referenceContext).binding;
if (method != null) {
if (method.isStrictfp())
modifiers |= ClassFileConstants.AccStrictfp;
if (method.isViewedAsDeprecated() && !sourceType.isDeprecated())
modifiers |= ExtraCompilerModifiers.AccDeprecatedImplicitly;
}
}
break;
case CLASS_SCOPE :
// local member
if (enclosingType.isStrictfp())
modifiers |= ClassFileConstants.AccStrictfp;
if (enclosingType.isViewedAsDeprecated() && !sourceType.isDeprecated())
modifiers |= ExtraCompilerModifiers.AccDeprecatedImplicitly;
break;
}
scope = scope.parent;
} while (scope != null);
}
// after this point, tests on the 16 bits reserved.
int realModifiers = modifiers & ExtraCompilerModifiers.AccJustFlag;
if ((realModifiers & ClassFileConstants.AccInterface) != 0) { // interface and annotation type
// detect abnormal cases for interfaces
if (isMemberType) {
final int UNEXPECTED_MODIFIERS =
~(ClassFileConstants.AccPublic | ClassFileConstants.AccPrivate | ClassFileConstants.AccProtected | ClassFileConstants.AccStatic | ClassFileConstants.AccAbstract | ClassFileConstants.AccInterface | ClassFileConstants.AccStrictfp | ClassFileConstants.AccAnnotation);
if ((realModifiers & UNEXPECTED_MODIFIERS) != 0) {
if ((realModifiers & ClassFileConstants.AccAnnotation) != 0)
problemReporter().illegalModifierForAnnotationMemberType(sourceType);
else
problemReporter().illegalModifierForMemberInterface(sourceType);
}
/*
} else if (sourceType.isLocalType()) { //interfaces cannot be defined inside a method
int unexpectedModifiers = ~(AccAbstract | AccInterface | AccStrictfp);
if ((realModifiers & unexpectedModifiers) != 0)
problemReporter().illegalModifierForLocalInterface(sourceType);
*/
} else {
final int UNEXPECTED_MODIFIERS = ~(ClassFileConstants.AccPublic | ClassFileConstants.AccAbstract | ClassFileConstants.AccInterface | ClassFileConstants.AccStrictfp | ClassFileConstants.AccAnnotation);
if ((realModifiers & UNEXPECTED_MODIFIERS) != 0) {
if ((realModifiers & ClassFileConstants.AccAnnotation) != 0)
problemReporter().illegalModifierForAnnotationType(sourceType);
else
problemReporter().illegalModifierForInterface(sourceType);
}
}
/*
* AccSynthetic must be set if the target is greater than 1.5. 1.5 VM don't support AccSynthetics flag.
*/
if (sourceType.sourceName == TypeConstants.PACKAGE_INFO_NAME && compilerOptions().targetJDK > ClassFileConstants.JDK1_5) {
modifiers |= ClassFileConstants.AccSynthetic;
}
modifiers |= ClassFileConstants.AccAbstract;
} else if ((realModifiers & ClassFileConstants.AccEnum) != 0) {
// detect abnormal cases for enums
if (isMemberType) { // includes member types defined inside local types
final int UNEXPECTED_MODIFIERS = ~(ClassFileConstants.AccPublic | ClassFileConstants.AccPrivate | ClassFileConstants.AccProtected | ClassFileConstants.AccStatic | ClassFileConstants.AccStrictfp | ClassFileConstants.AccEnum);
if ((realModifiers & UNEXPECTED_MODIFIERS) != 0) {
problemReporter().illegalModifierForMemberEnum(sourceType);
modifiers &= ~ClassFileConstants.AccAbstract; // avoid leaking abstract modifier
realModifiers &= ~ClassFileConstants.AccAbstract;
// modifiers &= ~(realModifiers & UNEXPECTED_MODIFIERS);
// realModifiers = modifiers & ExtraCompilerModifiers.AccJustFlag;
}
} else if (sourceType.isLocalType()) {
// each enum constant is an anonymous local type and its modifiers were already checked as an enum constant field
} else {
final int UNEXPECTED_MODIFIERS = ~(ClassFileConstants.AccPublic | ClassFileConstants.AccStrictfp | ClassFileConstants.AccEnum);
if ((realModifiers & UNEXPECTED_MODIFIERS) != 0)
problemReporter().illegalModifierForEnum(sourceType);
}
if (!sourceType.isAnonymousType()) {
checkAbstractEnum: {
// does define abstract methods ?
if ((this.referenceContext.bits & ASTNode.HasAbstractMethods) != 0) {
modifiers |= ClassFileConstants.AccAbstract;
break checkAbstractEnum;
}
// body of enum constant must implement any inherited abstract methods
// enum type needs to implement abstract methods if one of its constants does not supply a body
TypeDeclaration typeDeclaration = this.referenceContext;
FieldDeclaration[] fields = typeDeclaration.fields;
int fieldsLength = fields == null ? 0 : fields.length;
if (fieldsLength == 0) break checkAbstractEnum; // has no constants so must implement the method itself
AbstractMethodDeclaration[] methods = typeDeclaration.methods;
int methodsLength = methods == null ? 0 : methods.length;
// TODO (kent) cannot tell that the superinterfaces are empty or that their methods are implemented
boolean definesAbstractMethod = typeDeclaration.superInterfaces != null;
for (int i = 0; i < methodsLength && !definesAbstractMethod; i++)
definesAbstractMethod = methods[i].isAbstract();
if (!definesAbstractMethod) break checkAbstractEnum; // all methods have bodies
boolean needAbstractBit = false;
for (int i = 0; i < fieldsLength; i++) {
FieldDeclaration fieldDecl = fields[i];
if (fieldDecl.getKind() == AbstractVariableDeclaration.ENUM_CONSTANT) {
if (fieldDecl.initialization instanceof QualifiedAllocationExpression) {
needAbstractBit = true;
} else {
break checkAbstractEnum;
}
}
}
// tag this enum as abstract since an abstract method must be implemented AND all enum constants define an anonymous body
// as a result, each of its anonymous constants will see it as abstract and must implement each inherited abstract method
if (needAbstractBit) {
modifiers |= ClassFileConstants.AccAbstract;
}
}
// final if no enum constant with anonymous body
checkFinalEnum: {
TypeDeclaration typeDeclaration = this.referenceContext;
FieldDeclaration[] fields = typeDeclaration.fields;
if (fields != null) {
for (int i = 0, fieldsLength = fields.length; i < fieldsLength; i++) {
FieldDeclaration fieldDecl = fields[i];
if (fieldDecl.getKind() == AbstractVariableDeclaration.ENUM_CONSTANT) {
if (fieldDecl.initialization instanceof QualifiedAllocationExpression) {
break checkFinalEnum;
}
}
}
}
modifiers |= ClassFileConstants.AccFinal;
}
}
} else {
// detect abnormal cases for classes
if (isMemberType) { // includes member types defined inside local types
final int UNEXPECTED_MODIFIERS = ~(ClassFileConstants.AccPublic | ClassFileConstants.AccPrivate | ClassFileConstants.AccProtected | ClassFileConstants.AccStatic | ClassFileConstants.AccAbstract | ClassFileConstants.AccFinal | ClassFileConstants.AccStrictfp);
if ((realModifiers & UNEXPECTED_MODIFIERS) != 0)
problemReporter().illegalModifierForMemberClass(sourceType);
} else if (sourceType.isLocalType()) {
final int UNEXPECTED_MODIFIERS = ~(ClassFileConstants.AccAbstract | ClassFileConstants.AccFinal | ClassFileConstants.AccStrictfp);
if ((realModifiers & UNEXPECTED_MODIFIERS) != 0)
problemReporter().illegalModifierForLocalClass(sourceType);
} else {
final int UNEXPECTED_MODIFIERS = ~(ClassFileConstants.AccPublic | ClassFileConstants.AccAbstract | ClassFileConstants.AccFinal | ClassFileConstants.AccStrictfp);
if ((realModifiers & UNEXPECTED_MODIFIERS) != 0)
problemReporter().illegalModifierForClass(sourceType);
}
// check that Final and Abstract are not set together
if ((realModifiers & (ClassFileConstants.AccFinal | ClassFileConstants.AccAbstract)) == (ClassFileConstants.AccFinal | ClassFileConstants.AccAbstract))
problemReporter().illegalModifierCombinationFinalAbstractForClass(sourceType);
}
if (isMemberType) {
// test visibility modifiers inconsistency, isolate the accessors bits
if (enclosingType.isInterface()) {
if ((realModifiers & (ClassFileConstants.AccProtected | ClassFileConstants.AccPrivate)) != 0) {
problemReporter().illegalVisibilityModifierForInterfaceMemberType(sourceType);
// need to keep the less restrictive
if ((realModifiers & ClassFileConstants.AccProtected) != 0)
modifiers &= ~ClassFileConstants.AccProtected;
if ((realModifiers & ClassFileConstants.AccPrivate) != 0)
modifiers &= ~ClassFileConstants.AccPrivate;
}
} else {
int accessorBits = realModifiers & (ClassFileConstants.AccPublic | ClassFileConstants.AccProtected | ClassFileConstants.AccPrivate);
if ((accessorBits & (accessorBits - 1)) > 1) {
problemReporter().illegalVisibilityModifierCombinationForMemberType(sourceType);
// need to keep the less restrictive so disable Protected/Private as necessary
if ((accessorBits & ClassFileConstants.AccPublic) != 0) {
if ((accessorBits & ClassFileConstants.AccProtected) != 0)
modifiers &= ~ClassFileConstants.AccProtected;
if ((accessorBits & ClassFileConstants.AccPrivate) != 0)
modifiers &= ~ClassFileConstants.AccPrivate;
} else if ((accessorBits & ClassFileConstants.AccProtected) != 0 && (accessorBits & ClassFileConstants.AccPrivate) != 0) {
modifiers &= ~ClassFileConstants.AccPrivate;
}
}
}
// static modifier test
if ((realModifiers & ClassFileConstants.AccStatic) == 0) {
if (enclosingType.isInterface())
modifiers |= ClassFileConstants.AccStatic;
} else if (!enclosingType.isStatic()) {
// error the enclosing type of a static field must be static or a top-level type
problemReporter().illegalStaticModifierForMemberType(sourceType);
}
}
sourceType.modifiers = modifiers;
}
/* This method checks the modifiers of a field.
*
* 9.3 & 8.3
* Need to integrate the check for the final modifiers for nested types
*
* Note : A scope is accessible by : fieldBinding.declaringClass.scope
*/
private void checkAndSetModifiersForField(FieldBinding fieldBinding, FieldDeclaration fieldDecl) {
int modifiers = fieldBinding.modifiers;
final ReferenceBinding declaringClass = fieldBinding.declaringClass;
if ((modifiers & ExtraCompilerModifiers.AccAlternateModifierProblem) != 0)
problemReporter().duplicateModifierForField(declaringClass, fieldDecl);
if (declaringClass.isInterface()) {
final int IMPLICIT_MODIFIERS = ClassFileConstants.AccPublic | ClassFileConstants.AccStatic | ClassFileConstants.AccFinal;
// set the modifiers
modifiers |= IMPLICIT_MODIFIERS;
// and then check that they are the only ones
if ((modifiers & ExtraCompilerModifiers.AccJustFlag) != IMPLICIT_MODIFIERS) {
if ((declaringClass.modifiers & ClassFileConstants.AccAnnotation) != 0)
problemReporter().illegalModifierForAnnotationField(fieldDecl);
else
problemReporter().illegalModifierForInterfaceField(fieldDecl);
}
fieldBinding.modifiers = modifiers;
return;
} else if (fieldDecl.getKind() == AbstractVariableDeclaration.ENUM_CONSTANT) {
// check that they are not modifiers in source
if ((modifiers & ExtraCompilerModifiers.AccJustFlag) != 0)
problemReporter().illegalModifierForEnumConstant(declaringClass, fieldDecl);
// set the modifiers
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=267670. Force all enumerators to be marked
// as used locally. We are unable to track the usage of these reliably as they could be used
// in non obvious ways via the synthesized methods values() and valueOf(String) or by using
// Enum.valueOf(Class<T>, String).
final int IMPLICIT_MODIFIERS = ClassFileConstants.AccPublic | ClassFileConstants.AccStatic | ClassFileConstants.AccFinal | ClassFileConstants.AccEnum | ExtraCompilerModifiers.AccLocallyUsed;
fieldBinding.modifiers|= IMPLICIT_MODIFIERS;
return;
}
// after this point, tests on the 16 bits reserved.
int realModifiers = modifiers & ExtraCompilerModifiers.AccJustFlag;
final int UNEXPECTED_MODIFIERS = ~(ClassFileConstants.AccPublic | ClassFileConstants.AccPrivate | ClassFileConstants.AccProtected | ClassFileConstants.AccFinal | ClassFileConstants.AccStatic | ClassFileConstants.AccTransient | ClassFileConstants.AccVolatile);
if ((realModifiers & UNEXPECTED_MODIFIERS) != 0) {
problemReporter().illegalModifierForField(declaringClass, fieldDecl);
modifiers &= ~ExtraCompilerModifiers.AccJustFlag | ~UNEXPECTED_MODIFIERS;
}
int accessorBits = realModifiers & (ClassFileConstants.AccPublic | ClassFileConstants.AccProtected | ClassFileConstants.AccPrivate);
if ((accessorBits & (accessorBits - 1)) > 1) {
problemReporter().illegalVisibilityModifierCombinationForField(declaringClass, fieldDecl);
// need to keep the less restrictive so disable Protected/Private as necessary
if ((accessorBits & ClassFileConstants.AccPublic) != 0) {
if ((accessorBits & ClassFileConstants.AccProtected) != 0)
modifiers &= ~ClassFileConstants.AccProtected;
if ((accessorBits & ClassFileConstants.AccPrivate) != 0)
modifiers &= ~ClassFileConstants.AccPrivate;
} else if ((accessorBits & ClassFileConstants.AccProtected) != 0 && (accessorBits & ClassFileConstants.AccPrivate) != 0) {
modifiers &= ~ClassFileConstants.AccPrivate;
}
}
if ((realModifiers & (ClassFileConstants.AccFinal | ClassFileConstants.AccVolatile)) == (ClassFileConstants.AccFinal | ClassFileConstants.AccVolatile))
problemReporter().illegalModifierCombinationFinalVolatileForField(declaringClass, fieldDecl);
if (fieldDecl.initialization == null && (modifiers & ClassFileConstants.AccFinal) != 0)
modifiers |= ExtraCompilerModifiers.AccBlankFinal;
fieldBinding.modifiers = modifiers;
}
public void checkParameterizedSuperTypeCollisions() {
// check for parameterized interface collisions (when different parameterizations occur)
SourceTypeBinding sourceType = this.referenceContext.binding;
ReferenceBinding[] interfaces = sourceType.superInterfaces;
Map invocations = new HashMap(2);
ReferenceBinding itsSuperclass = sourceType.isInterface() ? null : sourceType.superclass;
nextInterface: for (int i = 0, length = interfaces.length; i < length; i++) {
ReferenceBinding one = interfaces[i];
if (one == null) continue nextInterface;
if (itsSuperclass != null && hasErasedCandidatesCollisions(itsSuperclass, one, invocations, sourceType, this.referenceContext))
continue nextInterface;
nextOtherInterface: for (int j = 0; j < i; j++) {
ReferenceBinding two = interfaces[j];
if (two == null) continue nextOtherInterface;
if (hasErasedCandidatesCollisions(one, two, invocations, sourceType, this.referenceContext))
continue nextInterface;
}
}
TypeParameter[] typeParameters = this.referenceContext.typeParameters;
nextVariable : for (int i = 0, paramLength = typeParameters == null ? 0 : typeParameters.length; i < paramLength; i++) {
TypeParameter typeParameter = typeParameters[i];
TypeVariableBinding typeVariable = typeParameter.binding;
if (typeVariable == null || !typeVariable.isValidBinding()) continue nextVariable;
TypeReference[] boundRefs = typeParameter.bounds;
if (boundRefs != null) {
boolean checkSuperclass = typeVariable.firstBound == typeVariable.superclass;
for (int j = 0, boundLength = boundRefs.length; j < boundLength; j++) {
TypeReference typeRef = boundRefs[j];
TypeBinding superType = typeRef.resolvedType;
if (superType == null || !superType.isValidBinding()) continue;
// check against superclass
if (checkSuperclass)
if (hasErasedCandidatesCollisions(superType, typeVariable.superclass, invocations, typeVariable, typeRef))
continue nextVariable;
// check against superinterfaces
for (int index = typeVariable.superInterfaces.length; --index >= 0;)
if (hasErasedCandidatesCollisions(superType, typeVariable.superInterfaces[index], invocations, typeVariable, typeRef))
continue nextVariable;
}
}
}
ReferenceBinding[] memberTypes = this.referenceContext.binding.memberTypes;
if (memberTypes != null && memberTypes != Binding.NO_MEMBER_TYPES)
for (int i = 0, size = memberTypes.length; i < size; i++)
((SourceTypeBinding) memberTypes[i]).scope.checkParameterizedSuperTypeCollisions();
}
private void checkForInheritedMemberTypes(SourceTypeBinding sourceType) {
// search up the hierarchy of the sourceType to see if any superType defines a member type
// when no member types are defined, tag the sourceType & each superType with the HasNoMemberTypes bit
// assumes super types have already been checked & tagged
ReferenceBinding currentType = sourceType;
ReferenceBinding[] interfacesToVisit = null;
int nextPosition = 0;
do {
if (currentType.hasMemberTypes()) // avoid resolving member types eagerly
return;
ReferenceBinding[] itsInterfaces = currentType.superInterfaces();
// in code assist cases when source types are added late, may not be finished connecting hierarchy
if (itsInterfaces != null && itsInterfaces != Binding.NO_SUPERINTERFACES) {
if (interfacesToVisit == null) {
interfacesToVisit = itsInterfaces;
nextPosition = interfacesToVisit.length;
} else {
int itsLength = itsInterfaces.length;
if (nextPosition + itsLength >= interfacesToVisit.length)
System.arraycopy(interfacesToVisit, 0, interfacesToVisit = new ReferenceBinding[nextPosition + itsLength + 5], 0, nextPosition);
nextInterface : for (int a = 0; a < itsLength; a++) {
ReferenceBinding next = itsInterfaces[a];
for (int b = 0; b < nextPosition; b++)
if (next == interfacesToVisit[b]) continue nextInterface;
interfacesToVisit[nextPosition++] = next;
}
}
}
} while ((currentType = currentType.superclass()) != null && (currentType.tagBits & TagBits.HasNoMemberTypes) == 0);
if (interfacesToVisit != null) {
// contains the interfaces between the sourceType and any superclass, which was tagged as having no member types
boolean needToTag = false;
for (int i = 0; i < nextPosition; i++) {
ReferenceBinding anInterface = interfacesToVisit[i];
if ((anInterface.tagBits & TagBits.HasNoMemberTypes) == 0) { // skip interface if it already knows it has no member types
if (anInterface.hasMemberTypes()) // avoid resolving member types eagerly
return;
needToTag = true;
ReferenceBinding[] itsInterfaces = anInterface.superInterfaces();
if (itsInterfaces != null && itsInterfaces != Binding.NO_SUPERINTERFACES) {
int itsLength = itsInterfaces.length;
if (nextPosition + itsLength >= interfacesToVisit.length)
System.arraycopy(interfacesToVisit, 0, interfacesToVisit = new ReferenceBinding[nextPosition + itsLength + 5], 0, nextPosition);
nextInterface : for (int a = 0; a < itsLength; a++) {
ReferenceBinding next = itsInterfaces[a];
for (int b = 0; b < nextPosition; b++)
if (next == interfacesToVisit[b]) continue nextInterface;
interfacesToVisit[nextPosition++] = next;
}
}
}
}
if (needToTag) {
for (int i = 0; i < nextPosition; i++)
interfacesToVisit[i].tagBits |= TagBits.HasNoMemberTypes;
}
}
// tag the sourceType and all of its superclasses, unless they have already been tagged
currentType = sourceType;
do {
currentType.tagBits |= TagBits.HasNoMemberTypes;
} while ((currentType = currentType.superclass()) != null && (currentType.tagBits & TagBits.HasNoMemberTypes) == 0);
}
// Perform deferred bound checks for parameterized type references (only done after hierarchy is connected)
public void checkParameterizedTypeBounds() {
for (int i = 0, l = this.deferredBoundChecks == null ? 0 : this.deferredBoundChecks.size(); i < l; i++)
((TypeReference) this.deferredBoundChecks.get(i)).checkBounds(this);
this.deferredBoundChecks = null;
ReferenceBinding[] memberTypes = this.referenceContext.binding.memberTypes;
if (memberTypes != null && memberTypes != Binding.NO_MEMBER_TYPES)
for (int i = 0, size = memberTypes.length; i < size; i++)
((SourceTypeBinding) memberTypes[i]).scope.checkParameterizedTypeBounds();
}
private void connectMemberTypes() {
SourceTypeBinding sourceType = this.referenceContext.binding;
ReferenceBinding[] memberTypes = sourceType.memberTypes;
if (memberTypes != null && memberTypes != Binding.NO_MEMBER_TYPES) {
for (int i = 0, size = memberTypes.length; i < size; i++)
((SourceTypeBinding) memberTypes[i]).scope.connectTypeHierarchy();
}
}
/*
Our current belief based on available JCK tests is:
inherited member types are visible as a potential superclass.
inherited interfaces are not visible when defining a superinterface.
Error recovery story:
ensure the superclass is set to java.lang.Object if a problem is detected
resolving the superclass.
Answer false if an error was reported against the sourceType.
*/
private boolean connectSuperclass() {
SourceTypeBinding sourceType = this.referenceContext.binding;
if (sourceType.id == TypeIds.T_JavaLangObject) { // handle the case of redefining java.lang.Object up front
sourceType.superclass = null;
sourceType.superInterfaces = Binding.NO_SUPERINTERFACES;
if (!sourceType.isClass())
problemReporter().objectMustBeClass(sourceType);
if (this.referenceContext.superclass != null || (this.referenceContext.superInterfaces != null && this.referenceContext.superInterfaces.length > 0))
problemReporter().objectCannotHaveSuperTypes(sourceType);
return true; // do not propagate Object's hierarchy problems down to every subtype
}
if (this.referenceContext.superclass == null) {
if (sourceType.isEnum() && compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5) // do not connect if source < 1.5 as enum already got flagged as syntax error
return connectEnumSuperclass();
sourceType.superclass = getJavaLangObject();
return !detectHierarchyCycle(sourceType, sourceType.superclass, null);
}
TypeReference superclassRef = this.referenceContext.superclass;
ReferenceBinding superclass = findSupertype(superclassRef);
if (superclass != null) { // is null if a cycle was detected cycle or a problem
if (!superclass.isClass() && (superclass.tagBits & TagBits.HasMissingType) == 0) {
problemReporter().superclassMustBeAClass(sourceType, superclassRef, superclass);
} else if (superclass.isFinal()) {
problemReporter().classExtendFinalClass(sourceType, superclassRef, superclass);
} else if ((superclass.tagBits & TagBits.HasDirectWildcard) != 0) {
problemReporter().superTypeCannotUseWildcard(sourceType, superclassRef, superclass);
} else if (superclass.erasure().id == TypeIds.T_JavaLangEnum) {
problemReporter().cannotExtendEnum(sourceType, superclassRef, superclass);
} else if ((superclass.tagBits & TagBits.HierarchyHasProblems) != 0
|| !superclassRef.resolvedType.isValidBinding()) {
sourceType.superclass = superclass;
sourceType.tagBits |= TagBits.HierarchyHasProblems; // propagate if missing supertype
return superclassRef.resolvedType.isValidBinding(); // reported some error against the source type ?
} else {
// only want to reach here when no errors are reported
sourceType.superclass = superclass;
return true;
}
}
sourceType.tagBits |= TagBits.HierarchyHasProblems;
sourceType.superclass = getJavaLangObject();
if ((sourceType.superclass.tagBits & TagBits.BeginHierarchyCheck) == 0)
detectHierarchyCycle(sourceType, sourceType.superclass, null);
return false; // reported some error against the source type
}
/**
* enum X (implicitly) extends Enum<X>
*/
private boolean connectEnumSuperclass() {
SourceTypeBinding sourceType = this.referenceContext.binding;
ReferenceBinding rootEnumType = getJavaLangEnum();
if ((rootEnumType.tagBits & TagBits.HasMissingType) != 0) {
sourceType.tagBits |= TagBits.HierarchyHasProblems; // mark missing supertpye
sourceType.superclass = rootEnumType;
return false;
}
boolean foundCycle = detectHierarchyCycle(sourceType, rootEnumType, null);
// arity check for well-known Enum<E>
TypeVariableBinding[] refTypeVariables = rootEnumType.typeVariables();
if (refTypeVariables == Binding.NO_TYPE_VARIABLES) { // check generic
problemReporter().nonGenericTypeCannotBeParameterized(0, null, rootEnumType, new TypeBinding[]{ sourceType });
return false; // cannot reach here as AbortCompilation is thrown
} else if (1 != refTypeVariables.length) { // check arity
problemReporter().incorrectArityForParameterizedType(null, rootEnumType, new TypeBinding[]{ sourceType });
return false; // cannot reach here as AbortCompilation is thrown
}
// check argument type compatibility
ParameterizedTypeBinding superType = environment().createParameterizedType(
rootEnumType,
new TypeBinding[]{
environment().convertToRawType(sourceType, false /*do not force conversion of enclosing types*/),
} ,
null);
sourceType.tagBits |= (superType.tagBits & TagBits.HierarchyHasProblems); // propagate if missing supertpye
sourceType.superclass = superType;
// bound check (in case of bogus definition of Enum type)
if (refTypeVariables[0].boundCheck(superType, sourceType) != TypeConstants.OK) {
problemReporter().typeMismatchError(rootEnumType, refTypeVariables[0], sourceType, null);
}
return !foundCycle;
}
/*
Our current belief based on available JCK 1.3 tests is:
inherited member types are visible as a potential superclass.
inherited interfaces are visible when defining a superinterface.
Error recovery story:
ensure the superinterfaces contain only valid visible interfaces.
Answer false if an error was reported against the sourceType.
*/
private boolean connectSuperInterfaces() {
SourceTypeBinding sourceType = this.referenceContext.binding;
sourceType.superInterfaces = Binding.NO_SUPERINTERFACES;
if (this.referenceContext.superInterfaces == null) {
if (sourceType.isAnnotationType() && compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5) { // do not connect if source < 1.5 as annotation already got flagged as syntax error) {
ReferenceBinding annotationType = getJavaLangAnnotationAnnotation();
boolean foundCycle = detectHierarchyCycle(sourceType, annotationType, null);
sourceType.superInterfaces = new ReferenceBinding[] { annotationType };
return !foundCycle;
}
return true;
}
if (sourceType.id == TypeIds.T_JavaLangObject) // already handled the case of redefining java.lang.Object
return true;
boolean noProblems = true;
int length = this.referenceContext.superInterfaces.length;
ReferenceBinding[] interfaceBindings = new ReferenceBinding[length];
int count = 0;
nextInterface : for (int i = 0; i < length; i++) {
TypeReference superInterfaceRef = this.referenceContext.superInterfaces[i];
ReferenceBinding superInterface = findSupertype(superInterfaceRef);
if (superInterface == null) { // detected cycle
sourceType.tagBits |= TagBits.HierarchyHasProblems;
noProblems = false;
continue nextInterface;
}
// check for simple interface collisions
// Check for a duplicate interface once the name is resolved, otherwise we may be confused (i.e. a.b.I and c.d.I)
for (int j = 0; j < i; j++) {
if (interfaceBindings[j] == superInterface) {
problemReporter().duplicateSuperinterface(sourceType, superInterfaceRef, superInterface);
sourceType.tagBits |= TagBits.HierarchyHasProblems;
noProblems = false;
continue nextInterface;
}
}
if (!superInterface.isInterface() && (superInterface.tagBits & TagBits.HasMissingType) == 0) {
problemReporter().superinterfaceMustBeAnInterface(sourceType, superInterfaceRef, superInterface);
sourceType.tagBits |= TagBits.HierarchyHasProblems;
noProblems = false;
continue nextInterface;
} else if (superInterface.isAnnotationType()){
problemReporter().annotationTypeUsedAsSuperinterface(sourceType, superInterfaceRef, superInterface);
}
if ((superInterface.tagBits & TagBits.HasDirectWildcard) != 0) {
problemReporter().superTypeCannotUseWildcard(sourceType, superInterfaceRef, superInterface);
sourceType.tagBits |= TagBits.HierarchyHasProblems;
noProblems = false;
continue nextInterface;
}
if ((superInterface.tagBits & TagBits.HierarchyHasProblems) != 0
|| !superInterfaceRef.resolvedType.isValidBinding()) {
sourceType.tagBits |= TagBits.HierarchyHasProblems; // propagate if missing supertype
noProblems &= superInterfaceRef.resolvedType.isValidBinding();
}
// only want to reach here when no errors are reported
interfaceBindings[count++] = superInterface;
}
// hold onto all correctly resolved superinterfaces
if (count > 0) {
if (count != length)
System.arraycopy(interfaceBindings, 0, interfaceBindings = new ReferenceBinding[count], 0, count);
sourceType.superInterfaces = interfaceBindings;
}
return noProblems;
}
void connectTypeHierarchy() {
SourceTypeBinding sourceType = this.referenceContext.binding;
if ((sourceType.tagBits & TagBits.BeginHierarchyCheck) == 0) {
sourceType.tagBits |= TagBits.BeginHierarchyCheck;
environment().typesBeingConnected.add(sourceType);
boolean noProblems = connectSuperclass();
noProblems &= connectSuperInterfaces();
environment().typesBeingConnected.remove(sourceType);
sourceType.tagBits |= TagBits.EndHierarchyCheck;
noProblems &= connectTypeVariables(this.referenceContext.typeParameters, false);
sourceType.tagBits |= TagBits.TypeVariablesAreConnected;
if (noProblems && sourceType.isHierarchyInconsistent())
problemReporter().hierarchyHasProblems(sourceType);
}
connectMemberTypes();
LookupEnvironment env = environment();
try {
env.missingClassFileLocation = this.referenceContext;
checkForInheritedMemberTypes(sourceType);
} catch (AbortCompilation e) {
e.updateContext(this.referenceContext, referenceCompilationUnit().compilationResult);
throw e;
} finally {
env.missingClassFileLocation = null;
}
}
private void connectTypeHierarchyWithoutMembers() {
// must ensure the imports are resolved
if (this.parent instanceof CompilationUnitScope) {
if (((CompilationUnitScope) this.parent).imports == null)
((CompilationUnitScope) this.parent).checkAndSetImports();
} else if (this.parent instanceof ClassScope) {
// ensure that the enclosing type has already been checked
((ClassScope) this.parent).connectTypeHierarchyWithoutMembers();
}
// double check that the hierarchy search has not already begun...
SourceTypeBinding sourceType = this.referenceContext.binding;
if ((sourceType.tagBits & TagBits.BeginHierarchyCheck) != 0)
return;
sourceType.tagBits |= TagBits.BeginHierarchyCheck;
environment().typesBeingConnected.add(sourceType);
boolean noProblems = connectSuperclass();
noProblems &= connectSuperInterfaces();
environment().typesBeingConnected.remove(sourceType);
sourceType.tagBits |= TagBits.EndHierarchyCheck;
noProblems &= connectTypeVariables(this.referenceContext.typeParameters, false);
sourceType.tagBits |= TagBits.TypeVariablesAreConnected;
if (noProblems && sourceType.isHierarchyInconsistent())
problemReporter().hierarchyHasProblems(sourceType);
}
public boolean detectHierarchyCycle(TypeBinding superType, TypeReference reference) {
if (!(superType instanceof ReferenceBinding)) return false;
if (reference == this.superTypeReference) { // see findSuperType()
if (superType.isTypeVariable())
return false; // error case caught in resolveSuperType()
// abstract class X<K,V> implements java.util.Map<K,V>
// static abstract class M<K,V> implements Entry<K,V>
if (superType.isParameterizedType())
superType = ((ParameterizedTypeBinding) superType).genericType();
compilationUnitScope().recordSuperTypeReference(superType); // to record supertypes
return detectHierarchyCycle(this.referenceContext.binding, (ReferenceBinding) superType, reference);
}
// Reinstate the code deleted by the fix for https://bugs.eclipse.org/bugs/show_bug.cgi?id=205235
// For details, see https://bugs.eclipse.org/bugs/show_bug.cgi?id=294057.
if ((superType.tagBits & TagBits.BeginHierarchyCheck) == 0 && superType instanceof SourceTypeBinding)
// ensure if this is a source superclass that it has already been checked
((SourceTypeBinding) superType).scope.connectTypeHierarchyWithoutMembers();
return false;
}
// Answer whether a cycle was found between the sourceType & the superType
private boolean detectHierarchyCycle(SourceTypeBinding sourceType, ReferenceBinding superType, TypeReference reference) {
if (superType.isRawType())
superType = ((RawTypeBinding) superType).genericType();
// by this point the superType must be a binary or source type
if (sourceType == superType) {
problemReporter().hierarchyCircularity(sourceType, superType, reference);
sourceType.tagBits |= TagBits.HierarchyHasProblems;
return true;
}
if (superType.isMemberType()) {
ReferenceBinding current = superType.enclosingType();
do {
if (current.isHierarchyBeingActivelyConnected() && current == sourceType) {
problemReporter().hierarchyCircularity(sourceType, current, reference);
sourceType.tagBits |= TagBits.HierarchyHasProblems;
current.tagBits |= TagBits.HierarchyHasProblems;
return true;
}
} while ((current = current.enclosingType()) != null);
}
if (superType.isBinaryBinding()) {
// force its superclass & superinterfaces to be found... 2 possibilities exist - the source type is included in the hierarchy of:
// - a binary type... this case MUST be caught & reported here
// - another source type... this case is reported against the other source type
boolean hasCycle = false;
ReferenceBinding parentType = superType.superclass();
if (parentType != null) {
if (sourceType == parentType) {
problemReporter().hierarchyCircularity(sourceType, superType, reference);
sourceType.tagBits |= TagBits.HierarchyHasProblems;
superType.tagBits |= TagBits.HierarchyHasProblems;
return true;
}
if (parentType.isParameterizedType())
parentType = ((ParameterizedTypeBinding) parentType).genericType();
hasCycle |= detectHierarchyCycle(sourceType, parentType, reference);
if ((parentType.tagBits & TagBits.HierarchyHasProblems) != 0) {
sourceType.tagBits |= TagBits.HierarchyHasProblems;
parentType.tagBits |= TagBits.HierarchyHasProblems; // propagate down the hierarchy
}
}
ReferenceBinding[] itsInterfaces = superType.superInterfaces();
if (itsInterfaces != null && itsInterfaces != Binding.NO_SUPERINTERFACES) {
for (int i = 0, length = itsInterfaces.length; i < length; i++) {
ReferenceBinding anInterface = itsInterfaces[i];
if (sourceType == anInterface) {
problemReporter().hierarchyCircularity(sourceType, superType, reference);
sourceType.tagBits |= TagBits.HierarchyHasProblems;
superType.tagBits |= TagBits.HierarchyHasProblems;
return true;
}
if (anInterface.isParameterizedType())
anInterface = ((ParameterizedTypeBinding) anInterface).genericType();
hasCycle |= detectHierarchyCycle(sourceType, anInterface, reference);
if ((anInterface.tagBits & TagBits.HierarchyHasProblems) != 0) {
sourceType.tagBits |= TagBits.HierarchyHasProblems;
superType.tagBits |= TagBits.HierarchyHasProblems;
}
}
}
return hasCycle;
}
if (superType.isHierarchyBeingActivelyConnected()) {
org.eclipse.jdt.internal.compiler.ast.TypeReference ref = ((SourceTypeBinding) superType).scope.superTypeReference;
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=133071
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=121734
if (ref != null && ref.resolvedType != null && ((ReferenceBinding) ref.resolvedType).isHierarchyBeingActivelyConnected()) {
problemReporter().hierarchyCircularity(sourceType, superType, reference);
sourceType.tagBits |= TagBits.HierarchyHasProblems;
superType.tagBits |= TagBits.HierarchyHasProblems;
return true;
}
if (ref != null && ref.resolvedType == null) {
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=319885 Don't cry foul prematurely.
// Check the edges traversed to see if there really is a cycle.
char [] referredName = ref.getLastToken();
for (Iterator iter = environment().typesBeingConnected.iterator(); iter.hasNext();) {
SourceTypeBinding type = (SourceTypeBinding) iter.next();
if (CharOperation.equals(referredName, type.sourceName())) {
problemReporter().hierarchyCircularity(sourceType, superType, reference);
sourceType.tagBits |= TagBits.HierarchyHasProblems;
superType.tagBits |= TagBits.HierarchyHasProblems;
return true;
}
}
}
}
if ((superType.tagBits & TagBits.BeginHierarchyCheck) == 0)
// ensure if this is a source superclass that it has already been checked
((SourceTypeBinding) superType).scope.connectTypeHierarchyWithoutMembers();
if ((superType.tagBits & TagBits.HierarchyHasProblems) != 0)
sourceType.tagBits |= TagBits.HierarchyHasProblems;
return false;
}
private ReferenceBinding findSupertype(TypeReference typeReference) {
CompilationUnitScope unitScope = compilationUnitScope();
LookupEnvironment env = unitScope.environment;
try {
env.missingClassFileLocation = typeReference;
typeReference.aboutToResolve(this); // allows us to trap completion & selection nodes
unitScope.recordQualifiedReference(typeReference.getTypeName());
this.superTypeReference = typeReference;
ReferenceBinding superType = (ReferenceBinding) typeReference.resolveSuperType(this);
return superType;
} catch (AbortCompilation e) {
SourceTypeBinding sourceType = this.referenceContext.binding;
if (sourceType.superInterfaces == null) sourceType.superInterfaces = Binding.NO_SUPERINTERFACES; // be more resilient for hierarchies (144976)
e.updateContext(typeReference, referenceCompilationUnit().compilationResult);
throw e;
} finally {
env.missingClassFileLocation = null;
this.superTypeReference = null;
}
}
/* Answer the problem reporter to use for raising new problems.
*
* Note that as a side-effect, this updates the current reference context
* (unit, type or method) in case the problem handler decides it is necessary
* to abort.
*/
public ProblemReporter problemReporter() {
MethodScope outerMethodScope;
if ((outerMethodScope = outerMostMethodScope()) == null) {
ProblemReporter problemReporter = referenceCompilationUnit().problemReporter;
problemReporter.referenceContext = this.referenceContext;
return problemReporter;
}
return outerMethodScope.problemReporter();
}
/* Answer the reference type of this scope.
* It is the nearest enclosing type of this scope.
*/
public TypeDeclaration referenceType() {
return this.referenceContext;
}
public String toString() {
if (this.referenceContext != null)
return "--- Class Scope ---\n\n" //$NON-NLS-1$
+ this.referenceContext.binding.toString();
return "--- Class Scope ---\n\n Binding not initialized" ; //$NON-NLS-1$
}
}