/* *******************************************************************
* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
* 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:
* PARC initial implementation
* ******************************************************************/
package org.aspectj.weaver.bcel;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.classfile.Attribute;
import org.aspectj.apache.bcel.classfile.ClassParser;
import org.aspectj.apache.bcel.classfile.ConstantPool;
import org.aspectj.apache.bcel.classfile.JavaClass;
import org.aspectj.apache.bcel.classfile.Unknown;
import org.aspectj.apache.bcel.classfile.annotation.ArrayElementValue;
import org.aspectj.apache.bcel.classfile.annotation.ElementValue;
import org.aspectj.apache.bcel.classfile.annotation.NameValuePair;
import org.aspectj.apache.bcel.classfile.annotation.SimpleElementValue;
import org.aspectj.apache.bcel.generic.ArrayType;
import org.aspectj.apache.bcel.generic.BasicType;
import org.aspectj.apache.bcel.generic.Instruction;
import org.aspectj.apache.bcel.generic.InstructionByte;
import org.aspectj.apache.bcel.generic.InstructionCP;
import org.aspectj.apache.bcel.generic.InstructionConstants;
import org.aspectj.apache.bcel.generic.InstructionFactory;
import org.aspectj.apache.bcel.generic.InstructionHandle;
import org.aspectj.apache.bcel.generic.InstructionList;
import org.aspectj.apache.bcel.generic.InstructionSelect;
import org.aspectj.apache.bcel.generic.InstructionShort;
import org.aspectj.apache.bcel.generic.InstructionTargeter;
import org.aspectj.apache.bcel.generic.LineNumberTag;
import org.aspectj.apache.bcel.generic.ObjectType;
import org.aspectj.apache.bcel.generic.ReferenceType;
import org.aspectj.apache.bcel.generic.SwitchBuilder;
import org.aspectj.apache.bcel.generic.TargetLostException;
import org.aspectj.apache.bcel.generic.Type;
import org.aspectj.bridge.ISourceLocation;
import org.aspectj.weaver.AjAttribute;
import org.aspectj.weaver.AjAttribute.WeaverVersionInfo;
import org.aspectj.weaver.AnnotationAJ;
import org.aspectj.weaver.BCException;
import org.aspectj.weaver.ConstantPoolReader;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.Lint;
import org.aspectj.weaver.Member;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.Utils;
import org.aspectj.weaver.World;
public class Utility {
public static List<AjAttribute> readAjAttributes(String classname, Attribute[] as, ISourceContext context, World w,
AjAttribute.WeaverVersionInfo version, ConstantPoolReader dataDecompressor) {
List<AjAttribute> attributes = new ArrayList<AjAttribute>();
// first pass, look for version
List<Unknown> forSecondPass = new ArrayList<Unknown>();
for (int i = as.length - 1; i >= 0; i--) {
Attribute a = as[i];
if (a instanceof Unknown) {
Unknown u = (Unknown) a;
String name = u.getName();
if (name.charAt(0) == 'o') { // 'o'rg.aspectj
if (name.startsWith(AjAttribute.AttributePrefix)) {
if (name.endsWith(WeaverVersionInfo.AttributeName)) {
version = (AjAttribute.WeaverVersionInfo) AjAttribute.read(version, name, u.getBytes(), context, w,
dataDecompressor);
if (version.getMajorVersion() > WeaverVersionInfo.getCurrentWeaverMajorVersion()) {
throw new BCException(
"Unable to continue, this version of AspectJ supports classes built with weaver version "
+ WeaverVersionInfo.toCurrentVersionString() + " but the class " + classname
+ " is version " + version.toString() + ". Please update your AspectJ.");
}
}
forSecondPass.add(u);
}
}
}
}
// FIXASC why going backwards? is it important
for (int i = forSecondPass.size() - 1; i >= 0; i--) {
Unknown a = forSecondPass.get(i);
String name = a.getName();
AjAttribute attr = AjAttribute.read(version, name, a.getBytes(), context, w, dataDecompressor);
if (attr != null) {
attributes.add(attr);
}
}
return attributes;
}
/*
* Ensure we report a nice source location - particular in the case where the source info is missing (binary weave).
*/
public static String beautifyLocation(ISourceLocation isl) {
StringBuffer nice = new StringBuffer();
if (isl == null || isl.getSourceFile() == null || isl.getSourceFile().getName().indexOf("no debug info available") != -1) {
nice.append("no debug info available");
} else {
// can't use File.getName() as this fails when a Linux box
// encounters a path created on Windows and vice-versa
int takeFrom = isl.getSourceFile().getPath().lastIndexOf('/');
if (takeFrom == -1) {
takeFrom = isl.getSourceFile().getPath().lastIndexOf('\\');
}
nice.append(isl.getSourceFile().getPath().substring(takeFrom + 1));
if (isl.getLine() != 0) {
nice.append(":").append(isl.getLine());
}
}
return nice.toString();
}
public static Instruction createSuperInvoke(InstructionFactory fact, BcelWorld world, Member signature) {
short kind;
if (Modifier.isInterface(signature.getModifiers())) {
throw new RuntimeException("bad");
} else if (Modifier.isPrivate(signature.getModifiers()) || signature.getName().equals("<init>")) {
throw new RuntimeException("unimplemented, possibly bad");
} else if (Modifier.isStatic(signature.getModifiers())) {
throw new RuntimeException("bad");
} else {
kind = Constants.INVOKESPECIAL;
}
return fact.createInvoke(signature.getDeclaringType().getName(), signature.getName(),
BcelWorld.makeBcelType(signature.getReturnType()), BcelWorld.makeBcelTypes(signature.getParameterTypes()), kind);
}
public static Instruction createInvoke(InstructionFactory fact, BcelWorld world, Member signature) {
short kind;
int signatureModifiers = signature.getModifiers();
if (Modifier.isInterface(signatureModifiers)) {
kind = Constants.INVOKEINTERFACE;
} else if (Modifier.isStatic(signatureModifiers)) {
kind = Constants.INVOKESTATIC;
} else if (Modifier.isPrivate(signatureModifiers) || signature.getName().equals("<init>")) {
kind = Constants.INVOKESPECIAL;
} else {
kind = Constants.INVOKEVIRTUAL;
}
UnresolvedType targetType = signature.getDeclaringType();
if (targetType.isParameterizedType()) {
targetType = targetType.resolve(world).getGenericType();
}
return fact.createInvoke(targetType.getName(), signature.getName(), BcelWorld.makeBcelType(signature.getReturnType()),
BcelWorld.makeBcelTypes(signature.getParameterTypes()), kind);
}
public static Instruction createGet(InstructionFactory fact, Member signature) {
short kind;
if (Modifier.isStatic(signature.getModifiers())) {
kind = Constants.GETSTATIC;
} else {
kind = Constants.GETFIELD;
}
return fact.createFieldAccess(signature.getDeclaringType().getName(), signature.getName(),
BcelWorld.makeBcelType(signature.getReturnType()), kind);
}
public static Instruction createSet(InstructionFactory fact, Member signature) {
short kind;
if (Modifier.isStatic(signature.getModifiers())) {
kind = Constants.PUTSTATIC;
} else {
kind = Constants.PUTFIELD;
}
return fact.createFieldAccess(signature.getDeclaringType().getName(), signature.getName(),
BcelWorld.makeBcelType(signature.getReturnType()), kind);
}
public static Instruction createInstanceof(InstructionFactory fact, ReferenceType t) {
int cpoolEntry = (t instanceof ArrayType) ? fact.getConstantPool().addArrayClass((ArrayType) t) : fact.getConstantPool()
.addClass((ObjectType) t);
return new InstructionCP(Constants.INSTANCEOF, cpoolEntry);
}
public static Instruction createInvoke(InstructionFactory fact, LazyMethodGen m) {
short kind;
if (m.getEnclosingClass().isInterface()) {
kind = Constants.INVOKEINTERFACE;
} else if (m.isStatic()) {
kind = Constants.INVOKESTATIC;
} else if (m.isPrivate() || m.getName().equals("<init>")) {
kind = Constants.INVOKESPECIAL;
} else {
kind = Constants.INVOKEVIRTUAL;
}
return fact.createInvoke(m.getClassName(), m.getName(), m.getReturnType(), m.getArgumentTypes(), kind);
}
/**
* Create an invoke instruction
*
* @param fact
* @param kind INVOKEINTERFACE, INVOKEVIRTUAL..
* @param member
* @return
*/
public static Instruction createInvoke(InstructionFactory fact, short kind, Member member) {
return fact.createInvoke(member.getDeclaringType().getName(), member.getName(),
BcelWorld.makeBcelType(member.getReturnType()), BcelWorld.makeBcelTypes(member.getParameterTypes()), kind);
}
private static String[] argNames = new String[] { "arg0", "arg1", "arg2", "arg3", "arg4" };
// ??? these should perhaps be cached. Remember to profile this to see if
// it's a problem.
public static String[] makeArgNames(int n) {
String[] ret = new String[n];
for (int i = 0; i < n; i++) {
if (i < 5) {
ret[i] = argNames[i];
} else {
ret[i] = "arg" + i;
}
}
return ret;
}
// Lookup table, for converting between pairs of types, it gives
// us the method name in the Conversions class
private static Hashtable<String, String> validBoxing = new Hashtable<String, String>();
static {
validBoxing.put("Ljava/lang/Byte;B", "byteObject");
validBoxing.put("Ljava/lang/Character;C", "charObject");
validBoxing.put("Ljava/lang/Double;D", "doubleObject");
validBoxing.put("Ljava/lang/Float;F", "floatObject");
validBoxing.put("Ljava/lang/Integer;I", "intObject");
validBoxing.put("Ljava/lang/Long;J", "longObject");
validBoxing.put("Ljava/lang/Short;S", "shortObject");
validBoxing.put("Ljava/lang/Boolean;Z", "booleanObject");
validBoxing.put("BLjava/lang/Byte;", "byteValue");
validBoxing.put("CLjava/lang/Character;", "charValue");
validBoxing.put("DLjava/lang/Double;", "doubleValue");
validBoxing.put("FLjava/lang/Float;", "floatValue");
validBoxing.put("ILjava/lang/Integer;", "intValue");
validBoxing.put("JLjava/lang/Long;", "longValue");
validBoxing.put("SLjava/lang/Short;", "shortValue");
validBoxing.put("ZLjava/lang/Boolean;", "booleanValue");
}
public static void appendConversion(InstructionList il, InstructionFactory fact, ResolvedType fromType, ResolvedType toType) {
if (!toType.isConvertableFrom(fromType) && !fromType.isConvertableFrom(toType)) {
throw new BCException("can't convert from " + fromType + " to " + toType);
}
// XXX I'm sure this test can be simpler but my brain hurts and this works
World w = toType.getWorld();
if (w == null) { // dbg349636
throw new IllegalStateException("Debug349636: Unexpectedly found world null for type " + toType.getName());
}
if (!w.isInJava5Mode()) {
if (toType.needsNoConversionFrom(fromType)) {
return;
}
} else {
if (toType.needsNoConversionFrom(fromType) && !(toType.isPrimitiveType() ^ fromType.isPrimitiveType())) {
return;
}
}
if (toType.equals(UnresolvedType.VOID)) {
// assert fromType.equals(UnresolvedType.OBJECT)
il.append(InstructionFactory.createPop(fromType.getSize()));
} else if (fromType.equals(UnresolvedType.VOID)) {
// assert toType.equals(UnresolvedType.OBJECT)
il.append(InstructionFactory.createNull(Type.OBJECT));
return;
} else if (fromType.equals(UnresolvedType.OBJECT)) {
Type to = BcelWorld.makeBcelType(toType);
if (toType.isPrimitiveType()) {
String name = toType.toString() + "Value";
il.append(fact.createInvoke("org.aspectj.runtime.internal.Conversions", name, to, new Type[] { Type.OBJECT },
Constants.INVOKESTATIC));
} else {
il.append(fact.createCheckCast((ReferenceType) to));
}
} else if (toType.equals(UnresolvedType.OBJECT)) {
// assert fromType.isPrimitive()
Type from = BcelWorld.makeBcelType(fromType);
String name = fromType.toString() + "Object";
il.append(fact.createInvoke("org.aspectj.runtime.internal.Conversions", name, Type.OBJECT, new Type[] { from },
Constants.INVOKESTATIC));
} else if (toType.getWorld().isInJava5Mode() && validBoxing.get(toType.getSignature() + fromType.getSignature()) != null) {
// XXX could optimize by using any java boxing code that may be just
// before the call...
Type from = BcelWorld.makeBcelType(fromType);
Type to = BcelWorld.makeBcelType(toType);
String name = validBoxing.get(toType.getSignature() + fromType.getSignature());
if (toType.isPrimitiveType()) {
il.append(fact.createInvoke("org.aspectj.runtime.internal.Conversions", name, to, new Type[] { Type.OBJECT },
Constants.INVOKESTATIC));
} else {
il.append(fact.createInvoke("org.aspectj.runtime.internal.Conversions", name, Type.OBJECT, new Type[] { from },
Constants.INVOKESTATIC));
il.append(fact.createCheckCast((ReferenceType) to));
}
} else if (fromType.isPrimitiveType()) {
// assert toType.isPrimitive()
Type from = BcelWorld.makeBcelType(fromType);
Type to = BcelWorld.makeBcelType(toType);
try {
Instruction i = fact.createCast(from, to);
if (i != null) {
il.append(i);
} else {
il.append(fact.createCast(from, Type.INT));
il.append(fact.createCast(Type.INT, to));
}
} catch (RuntimeException e) {
il.append(fact.createCast(from, Type.INT));
il.append(fact.createCast(Type.INT, to));
}
} else {
Type to = BcelWorld.makeBcelType(toType);
// assert ! fromType.isPrimitive() && ! toType.isPrimitive()
il.append(fact.createCheckCast((ReferenceType) to));
}
}
public static InstructionList createConversion(InstructionFactory factory, Type fromType, Type toType) {
return createConversion(factory, fromType, toType, false);
}
public static InstructionList createConversion(InstructionFactory fact, Type fromType, Type toType, boolean allowAutoboxing) {
// System.out.println("cast to: " + toType);
InstructionList il = new InstructionList();
// PR71273
if ((fromType.equals(Type.BYTE) || fromType.equals(Type.CHAR) || fromType.equals(Type.SHORT)) && (toType.equals(Type.INT))) {
return il;
}
if (fromType.equals(toType)) {
return il;
}
if (toType.equals(Type.VOID)) {
il.append(InstructionFactory.createPop(fromType.getSize()));
return il;
}
if (fromType.equals(Type.VOID)) {
if (toType instanceof BasicType) {
throw new BCException("attempting to cast from void to basic type");
}
il.append(InstructionFactory.createNull(Type.OBJECT));
return il;
}
if (fromType.equals(Type.OBJECT)) {
if (toType instanceof BasicType) {
String name = toType.toString() + "Value";
il.append(fact.createInvoke("org.aspectj.runtime.internal.Conversions", name, toType, new Type[] { Type.OBJECT },
Constants.INVOKESTATIC));
return il;
}
}
if (toType.equals(Type.OBJECT)) {
if (fromType instanceof BasicType) {
String name = fromType.toString() + "Object";
il.append(fact.createInvoke("org.aspectj.runtime.internal.Conversions", name, Type.OBJECT, new Type[] { fromType },
Constants.INVOKESTATIC));
return il;
} else if (fromType instanceof ReferenceType) {
return il;
} else {
throw new RuntimeException();
}
}
if (fromType instanceof ReferenceType && ((ReferenceType) fromType).isAssignmentCompatibleWith(toType)) {
return il;
}
if (allowAutoboxing) {
if (toType instanceof BasicType && fromType instanceof ReferenceType) {
// unboxing
String name = toType.toString() + "Value";
il.append(fact.createInvoke("org.aspectj.runtime.internal.Conversions", name, toType, new Type[] { Type.OBJECT },
Constants.INVOKESTATIC));
return il;
}
if (fromType instanceof BasicType && toType instanceof ReferenceType) {
// boxing
String name = fromType.toString() + "Object";
il.append(fact.createInvoke("org.aspectj.runtime.internal.Conversions", name, Type.OBJECT, new Type[] { fromType },
Constants.INVOKESTATIC));
il.append(fact.createCast(Type.OBJECT, toType));
return il;
}
}
il.append(fact.createCast(fromType, toType));
return il;
}
public static Instruction createConstant(InstructionFactory fact, int value) {
Instruction inst;
switch (value) {
case -1:
inst = InstructionConstants.ICONST_M1;
break;
case 0:
inst = InstructionConstants.ICONST_0;
break;
case 1:
inst = InstructionConstants.ICONST_1;
break;
case 2:
inst = InstructionConstants.ICONST_2;
break;
case 3:
inst = InstructionConstants.ICONST_3;
break;
case 4:
inst = InstructionConstants.ICONST_4;
break;
case 5:
inst = InstructionConstants.ICONST_5;
break;
default:
if (value <= Byte.MAX_VALUE && value >= Byte.MIN_VALUE) {
inst = new InstructionByte(Constants.BIPUSH, (byte) value);
} else if (value <= Short.MAX_VALUE && value >= Short.MIN_VALUE) {
inst = new InstructionShort(Constants.SIPUSH, (short) value);
} else {
int ii = fact.getClassGen().getConstantPool().addInteger(value);
inst = new InstructionCP(value <= Constants.MAX_BYTE ? Constants.LDC : Constants.LDC_W, ii);
}
break;
}
return inst;
}
/** For testing purposes: bit clunky but does work */
public static int testingParseCounter = 0;
public static JavaClass makeJavaClass(String filename, byte[] bytes) {
try {
testingParseCounter++;
ClassParser parser = new ClassParser(new ByteArrayInputStream(bytes), filename);
return parser.parse();
} catch (IOException e) {
throw new BCException("malformed class file");
}
}
/**
* replace an instruction handle with another instruction, in this case, a branch instruction.
*
* @param ih the instruction handle to replace.
* @param branchInstruction the branch instruction to replace ih with
* @param enclosingMethod where to find ih's instruction list.
*/
public static void replaceInstruction(InstructionHandle ih, InstructionList replacementInstructions,
LazyMethodGen enclosingMethod) {
InstructionList il = enclosingMethod.getBody();
InstructionHandle fresh = il.append(ih, replacementInstructions);
deleteInstruction(ih, fresh, enclosingMethod);
}
/**
* delete an instruction handle and retarget all targeters of the deleted instruction to the next instruction. Obviously, this
* should not be used to delete a control transfer instruction unless you know what you're doing.
*
* @param ih the instruction handle to delete.
* @param enclosingMethod where to find ih's instruction list.
*/
public static void deleteInstruction(InstructionHandle ih, LazyMethodGen enclosingMethod) {
deleteInstruction(ih, ih.getNext(), enclosingMethod);
}
/**
* delete an instruction handle and retarget all targeters of the deleted instruction to the provided target.
*
* @param ih the instruction handle to delete
* @param retargetTo the instruction handle to retarget targeters of ih to.
* @param enclosingMethod where to find ih's instruction list.
*/
public static void deleteInstruction(InstructionHandle ih, InstructionHandle retargetTo, LazyMethodGen enclosingMethod) {
InstructionList il = enclosingMethod.getBody();
for (InstructionTargeter targeter : ih.getTargetersCopy()) {
targeter.updateTarget(ih, retargetTo);
}
ih.removeAllTargeters();
try {
il.delete(ih);
} catch (TargetLostException e) {
throw new BCException("this really can't happen");
}
}
/**
* Fix for Bugzilla #39479, #40109 patch contributed by Andy Clement
*
* Need to manually copy Select instructions - if we rely on the the 'fresh' object created by copy(), the InstructionHandle
* array 'targets' inside the Select object will not have been deep copied, so modifying targets in fresh will modify the
* original Select - not what we want ! (It is a bug in BCEL to do with cloning Select objects).
*
* <pre>
* declare error:
* call(* Instruction.copy()) && within(org.aspectj.weaver)
* && !withincode(* Utility.copyInstruction(Instruction)):
* "use Utility.copyInstruction to work-around bug in Select.copy()";
* </pre>
*/
public static Instruction copyInstruction(Instruction i) {
if (i instanceof InstructionSelect) {
InstructionSelect freshSelect = (InstructionSelect) i;
// Create a new targets array that looks just like the existing one
InstructionHandle[] targets = new InstructionHandle[freshSelect.getTargets().length];
for (int ii = 0; ii < targets.length; ii++) {
targets[ii] = freshSelect.getTargets()[ii];
}
// Create a new select statement with the new targets array
return new SwitchBuilder(freshSelect.getMatchs(), targets, freshSelect.getTarget()).getInstruction();
} else {
return i.copy(); // Use clone for shallow copy...
}
}
/** returns -1 if no source line attribute */
// this naive version overruns the JVM stack size, if only Java understood
// tail recursion...
// public static int getSourceLine(InstructionHandle ih) {
// if (ih == null) return -1;
//
// InstructionTargeter[] ts = ih.getTargeters();
// if (ts != null) {
// for (int j = ts.length - 1; j >= 0; j--) {
// InstructionTargeter t = ts[j];
// if (t instanceof LineNumberTag) {
// return ((LineNumberTag)t).getLineNumber();
// }
// }
// }
// return getSourceLine(ih.getNext());
// }
public static int getSourceLine(InstructionHandle ih) {// ,boolean
// goforwards) {
int lookahead = 0;
// arbitrary rule that we will never lookahead more than 100
// instructions for a line #
while (lookahead++ < 100) {
if (ih == null) {
return -1;
}
Iterator<InstructionTargeter> tIter = ih.getTargeters().iterator();
while (tIter.hasNext()) {
InstructionTargeter t = tIter.next();
if (t instanceof LineNumberTag) {
return ((LineNumberTag) t).getLineNumber();
}
}
// if (goforwards) ih=ih.getNext(); else
ih = ih.getPrev();
}
// System.err.println("no line information available for: " + ih);
return -1;
}
// public static int getSourceLine(InstructionHandle ih) {
// return getSourceLine(ih,false);
// }
// assumes that there is no already extant source line tag. Otherwise we'll
// have to be better.
public static void setSourceLine(InstructionHandle ih, int lineNumber) {
// OPTIMIZE LineNumberTag instances for the same line could be shared
// throughout a method...
ih.addTargeter(new LineNumberTag(lineNumber));
}
public static int makePublic(int i) {
return i & ~(Modifier.PROTECTED | Modifier.PRIVATE) | Modifier.PUBLIC;
}
public static BcelVar[] pushAndReturnArrayOfVars(ResolvedType[] proceedParamTypes, InstructionList il, InstructionFactory fact,
LazyMethodGen enclosingMethod) {
int len = proceedParamTypes.length;
BcelVar[] ret = new BcelVar[len];
for (int i = len - 1; i >= 0; i--) {
ResolvedType typeX = proceedParamTypes[i];
Type type = BcelWorld.makeBcelType(typeX);
int local = enclosingMethod.allocateLocal(type);
il.append(InstructionFactory.createStore(type, local));
ret[i] = new BcelVar(typeX, local);
}
return ret;
}
public static boolean isConstantPushInstruction(Instruction i) {
long ii = Constants.instFlags[i.opcode];
return ((ii & Constants.PUSH_INST) != 0 && (ii & Constants.CONSTANT_INST) != 0);
}
/**
* Checks for suppression specified on the member or on the declaring type of that member
*/
public static boolean isSuppressing(Member member, String lintkey) {
boolean isSuppressing = Utils.isSuppressing(member.getAnnotations(), lintkey);
if (isSuppressing) {
return true;
}
UnresolvedType type = member.getDeclaringType();
if (type instanceof ResolvedType) {
return Utils.isSuppressing(((ResolvedType) type).getAnnotations(), lintkey);
}
return false;
}
public static List<Lint.Kind> getSuppressedWarnings(AnnotationAJ[] anns, Lint lint) {
if (anns == null) {
return Collections.emptyList();
}
// Go through the annotation types
List<Lint.Kind> suppressedWarnings = new ArrayList<Lint.Kind>();
boolean found = false;
for (int i = 0; !found && i < anns.length; i++) {
// Check for the SuppressAjWarnings annotation
if (UnresolvedType.SUPPRESS_AJ_WARNINGS.getSignature().equals(
((BcelAnnotation) anns[i]).getBcelAnnotation().getTypeSignature())) {
found = true;
// Two possibilities:
// 1. there are no values specified (i.e. @SuppressAjWarnings)
// 2. there are values specified (i.e. @SuppressAjWarnings("A")
// or @SuppressAjWarnings({"A","B"})
List<NameValuePair> vals = ((BcelAnnotation) anns[i]).getBcelAnnotation().getValues();
if (vals == null || vals.isEmpty()) { // (1)
suppressedWarnings.addAll(lint.allKinds());
} else { // (2)
// We know the value is an array value
ArrayElementValue array = (ArrayElementValue) (vals.get(0)).getValue();
ElementValue[] values = array.getElementValuesArray();
for (int j = 0; j < values.length; j++) {
// We know values in the array are strings
SimpleElementValue value = (SimpleElementValue) values[j];
Lint.Kind lintKind = lint.getLintKind(value.getValueString());
if (lintKind != null) {
suppressedWarnings.add(lintKind);
}
}
}
}
}
return suppressedWarnings;
}
// not yet used...
// public static boolean isSimple(Method method) {
// if (method.getCode()==null) return true;
// if (method.getCode().getCode().length>10) return false;
// InstructionList instrucs = new
// InstructionList(method.getCode().getCode()); // expensive!
// InstructionHandle InstrHandle = instrucs.getStart();
// while (InstrHandle != null) {
// Instruction Instr = InstrHandle.getInstruction();
// int opCode = Instr.opcode;
// // if current instruction is a branch instruction, see if it's a backward
// branch.
// // if it is return immediately (can't be trivial)
// if (Instr instanceof InstructionBranch) {
// // InstructionBranch BI = (InstructionBranch) Instr;
// if (Instr.getIndex() < 0) return false;
// } else if (Instr instanceof InvokeInstruction) {
// // if current instruction is an invocation, indicate that it can't be
// trivial
// return false;
// }
// InstrHandle = InstrHandle.getNext();
// }
// return true;
// }
public static Attribute bcelAttribute(AjAttribute a, ConstantPool pool) {
int nameIndex = pool.addUtf8(a.getNameString());
byte[] bytes = a.getBytes(new BcelConstantPoolWriter(pool));
int length = bytes.length;
return new Unknown(nameIndex, length, bytes, pool);
}
}