/*******************************************************************************
* Copyright (c) 2000, 2007 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
*******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.compiler.lookup;
import org.aspectj.org.eclipse.jdt.core.compiler.CharOperation;
import org.aspectj.org.eclipse.jdt.internal.compiler.util.HashtableOfPackage;
import org.aspectj.org.eclipse.jdt.internal.compiler.util.HashtableOfType;
public class PackageBinding extends Binding implements TypeConstants {
public long tagBits = 0; // See values in the interface TagBits below
public char[][] compoundName;
PackageBinding parent;
public LookupEnvironment environment;
HashtableOfType knownTypes;
HashtableOfPackage knownPackages;
protected PackageBinding() {
// for creating problem package
}
public PackageBinding(char[][] compoundName, PackageBinding parent, LookupEnvironment environment) {
this.compoundName = compoundName;
this.parent = parent;
this.environment = environment;
this.knownTypes = null; // initialized if used... class counts can be very large 300-600
this.knownPackages = new HashtableOfPackage(3); // sub-package counts are typically 0-3
}
public PackageBinding(char[] topLevelPackageName, LookupEnvironment environment) {
this(new char[][] {topLevelPackageName}, null, environment);
}
/* Create the default package.
*/
public PackageBinding(LookupEnvironment environment) {
this(CharOperation.NO_CHAR_CHAR, null, environment);
}
private void addNotFoundPackage(char[] simpleName) {
knownPackages.put(simpleName, LookupEnvironment.TheNotFoundPackage);
}
private void addNotFoundType(char[] simpleName) {
if (knownTypes == null)
knownTypes = new HashtableOfType(25);
knownTypes.put(simpleName, LookupEnvironment.TheNotFoundType);
}
void addPackage(PackageBinding element) {
knownPackages.put(element.compoundName[element.compoundName.length - 1], element);
}
void addType(ReferenceBinding element) {
if (knownTypes == null)
knownTypes = new HashtableOfType(25);
knownTypes.put(element.compoundName[element.compoundName.length - 1], element);
}
/* API
* Answer the receiver's binding type from Binding.BindingID.
*/
public final int kind() {
return Binding.PACKAGE;
}
/*
* slash separated name
* org.aspectj.org.eclipse.jdt.core --> org.aspectj.org.eclipse.jdt/core
*/
public char[] computeUniqueKey(boolean isLeaf) {
return CharOperation.concatWith(compoundName, '/');
}
private PackageBinding findPackage(char[] name) {
if (!environment.isPackage(this.compoundName, name))
return null;
char[][] subPkgCompoundName = CharOperation.arrayConcat(this.compoundName, name);
PackageBinding subPackageBinding = new PackageBinding(subPkgCompoundName, this, environment);
addPackage(subPackageBinding);
return subPackageBinding;
}
/* Answer the subpackage named name; ask the oracle for the package if its not in the cache.
* Answer null if it could not be resolved.
*
* NOTE: This should only be used when we know there is NOT a type with the same name.
*/
PackageBinding getPackage(char[] name) {
PackageBinding binding = getPackage0(name);
if (binding != null) {
if (binding == LookupEnvironment.TheNotFoundPackage)
return null;
else
return binding;
}
if ((binding = findPackage(name)) != null)
return binding;
// not found so remember a problem package binding in the cache for future lookups
addNotFoundPackage(name);
return null;
}
/* Answer the subpackage named name if it exists in the cache.
* Answer theNotFoundPackage if it could not be resolved the first time
* it was looked up, otherwise answer null.
*
* NOTE: Senders must convert theNotFoundPackage into a real problem
* package if its to returned.
*/
PackageBinding getPackage0(char[] name) {
return knownPackages.get(name);
}
/* Answer the type named name; ask the oracle for the type if its not in the cache.
* Answer a NotVisible problem type if the type is not visible from the invocationPackage.
* Answer null if it could not be resolved.
*
* NOTE: This should only be used by source types/scopes which know there is NOT a
* package with the same name.
*/
ReferenceBinding getType(char[] name) {
ReferenceBinding typeBinding = getType0(name);
if (typeBinding == null) {
if ((typeBinding = environment.askForType(this, name)) == null) {
// not found so remember a problem type binding in the cache for future lookups
addNotFoundType(name);
return null;
}
}
if (typeBinding == LookupEnvironment.TheNotFoundType)
return null;
typeBinding = BinaryTypeBinding.resolveType(typeBinding, environment, false); // no raw conversion for now
if (typeBinding.isNestedType())
return new ProblemReferenceBinding(name, typeBinding, ProblemReasons.InternalNameProvided);
return typeBinding;
}
/* Answer the type named name if it exists in the cache.
* Answer theNotFoundType if it could not be resolved the first time
* it was looked up, otherwise answer null.
*
* NOTE: Senders must convert theNotFoundType into a real problem
* reference type if its to returned.
*/
ReferenceBinding getType0(char[] name) {
if (knownTypes == null)
return null;
return knownTypes.get(name);
}
/* Answer the package or type named name; ask the oracle if it is not in the cache.
* Answer null if it could not be resolved.
*
* When collisions exist between a type name & a package name, answer the type.
* Treat the package as if it does not exist... a problem was already reported when the type was defined.
*
* NOTE: no visibility checks are performed.
* THIS SHOULD ONLY BE USED BY SOURCE TYPES/SCOPES.
*/
public Binding getTypeOrPackage(char[] name) {
ReferenceBinding typeBinding = getType0(name);
if (typeBinding != null && typeBinding != LookupEnvironment.TheNotFoundType) {
typeBinding = BinaryTypeBinding.resolveType(typeBinding, environment, false); // no raw conversion for now
if (typeBinding.isNestedType())
return new ProblemReferenceBinding(name, typeBinding, ProblemReasons.InternalNameProvided);
return typeBinding;
}
PackageBinding packageBinding = getPackage0(name);
if (packageBinding != null && packageBinding != LookupEnvironment.TheNotFoundPackage)
return packageBinding;
if (typeBinding == null) { // have not looked for it before
if ((typeBinding = environment.askForType(this, name)) != null) {
if (typeBinding.isNestedType())
return new ProblemReferenceBinding(name, typeBinding, ProblemReasons.InternalNameProvided);
return typeBinding;
}
// Since name could not be found, add a problem binding
// to the collections so it will be reported as an error next time.
addNotFoundType(name);
}
if (packageBinding == null) { // have not looked for it before
if ((packageBinding = findPackage(name)) != null)
return packageBinding;
addNotFoundPackage(name);
}
return null;
}
public char[] readableName() /*java.lang*/ {
return CharOperation.concatWith(compoundName, '.');
}
public String toString() {
if (compoundName == CharOperation.NO_CHAR_CHAR)
return "The Default Package"; //$NON-NLS-1$
else
return "package " + ((compoundName != null) ? CharOperation.toString(compoundName) : "UNNAMED"); //$NON-NLS-1$ //$NON-NLS-2$
}
}