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The AspectJ weaver introduces advices to java classes
/*******************************************************************************
* Copyright (c) 2005 Contributors.
* 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://eclipse.org/legal/epl-v10.html
*
* Contributors:
* initial implementation Alexandre Vasseur
*******************************************************************************/
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.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.StringTokenizer;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.classfile.Attribute;
import org.aspectj.apache.bcel.classfile.Constant;
import org.aspectj.apache.bcel.classfile.ConstantUtf8;
import org.aspectj.apache.bcel.classfile.Field;
import org.aspectj.apache.bcel.classfile.JavaClass;
import org.aspectj.apache.bcel.classfile.LocalVariable;
import org.aspectj.apache.bcel.classfile.LocalVariableTable;
import org.aspectj.apache.bcel.classfile.Method;
import org.aspectj.apache.bcel.classfile.Unknown;
import org.aspectj.apache.bcel.classfile.annotation.AnnotationGen;
import org.aspectj.apache.bcel.classfile.annotation.ArrayElementValue;
import org.aspectj.apache.bcel.classfile.annotation.ClassElementValue;
import org.aspectj.apache.bcel.classfile.annotation.ElementValue;
import org.aspectj.apache.bcel.classfile.annotation.NameValuePair;
import org.aspectj.apache.bcel.classfile.annotation.RuntimeAnnos;
import org.aspectj.apache.bcel.classfile.annotation.RuntimeVisAnnos;
import org.aspectj.apache.bcel.generic.Type;
import org.aspectj.asm.AsmManager;
import org.aspectj.asm.IHierarchy;
import org.aspectj.asm.IProgramElement;
import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.IMessageHandler;
import org.aspectj.bridge.ISourceLocation;
import org.aspectj.bridge.Message;
import org.aspectj.bridge.MessageUtil;
import org.aspectj.weaver.Advice;
import org.aspectj.weaver.AdviceKind;
import org.aspectj.weaver.AjAttribute;
import org.aspectj.weaver.AjAttribute.WeaverVersionInfo;
import org.aspectj.weaver.AjcMemberMaker;
import org.aspectj.weaver.BindingScope;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.MethodDelegateTypeMunger;
import org.aspectj.weaver.NameMangler;
import org.aspectj.weaver.ReferenceType;
import org.aspectj.weaver.ReferenceTypeDelegate;
import org.aspectj.weaver.ResolvedMember;
import org.aspectj.weaver.ResolvedPointcutDefinition;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.World;
import org.aspectj.weaver.patterns.DeclareErrorOrWarning;
import org.aspectj.weaver.patterns.DeclareParents;
import org.aspectj.weaver.patterns.DeclareParentsMixin;
import org.aspectj.weaver.patterns.DeclarePrecedence;
import org.aspectj.weaver.patterns.FormalBinding;
import org.aspectj.weaver.patterns.IScope;
import org.aspectj.weaver.patterns.ParserException;
import org.aspectj.weaver.patterns.PatternParser;
import org.aspectj.weaver.patterns.PerCflow;
import org.aspectj.weaver.patterns.PerClause;
import org.aspectj.weaver.patterns.PerFromSuper;
import org.aspectj.weaver.patterns.PerObject;
import org.aspectj.weaver.patterns.PerSingleton;
import org.aspectj.weaver.patterns.PerTypeWithin;
import org.aspectj.weaver.patterns.Pointcut;
import org.aspectj.weaver.patterns.TypePattern;
/**
* Annotation defined aspect reader. Reads the Java 5 annotations and turns them into AjAttributes
*
* @author Alexandre Vasseur
*/
public class AtAjAttributes {
private final static List NO_ATTRIBUTES = Collections.emptyList();
private final static String[] EMPTY_STRINGS = new String[0];
private final static String VALUE = "value";
private final static String ARGNAMES = "argNames";
private final static String POINTCUT = "pointcut";
private final static String THROWING = "throwing";
private final static String RETURNING = "returning";
private final static String STRING_DESC = "Ljava/lang/String;";
private final static String ASPECTJ_ANNOTATION_PACKAGE = "org.aspectj.lang.annotation";
private final static char PACKAGE_INITIAL_CHAR = ASPECTJ_ANNOTATION_PACKAGE.charAt(0);
/**
* A struct that allows to add extra arguments without always breaking the API
*/
private static class AjAttributeStruct {
/**
* The list of AjAttribute.XXX that we are populating from the @AJ read
*/
List ajAttributes = new ArrayList();
/**
* The resolved type (class) for which we are reading @AJ for (be it class, method, field annotations)
*/
final ResolvedType enclosingType;
final ISourceContext context;
final IMessageHandler handler;
public AjAttributeStruct(ResolvedType type, ISourceContext sourceContext, IMessageHandler messageHandler) {
enclosingType = type;
context = sourceContext;
handler = messageHandler;
}
}
/**
* A struct when we read @AJ on method
*
* @author Alexandre Vasseur
*/
private static class AjAttributeMethodStruct extends AjAttributeStruct {
// argument names used for formal binding
private String[] m_argumentNamesLazy = null;
public String unparsedArgumentNames = null; // Set only if discovered as
// argNames attribute of
// annotation
final Method method;
final BcelMethod bMethod;
public AjAttributeMethodStruct(Method method, BcelMethod bMethod, ResolvedType type, ISourceContext sourceContext,
IMessageHandler messageHandler) {
super(type, sourceContext, messageHandler);
this.method = method;
this.bMethod = bMethod;
}
public String[] getArgumentNames() {
if (m_argumentNamesLazy == null) {
m_argumentNamesLazy = getMethodArgumentNames(method, unparsedArgumentNames, this);
}
return m_argumentNamesLazy;
}
}
/**
* A struct when we read @AJ on field
*/
private static class AjAttributeFieldStruct extends AjAttributeStruct {
final Field field;
// final BcelField bField;
public AjAttributeFieldStruct(Field field, BcelField bField, ResolvedType type, ISourceContext sourceContext,
IMessageHandler messageHandler) {
super(type, sourceContext, messageHandler);
this.field = field;
// this.bField = bField;
}
}
/**
* Annotations are RuntimeVisible only. This allow us to not visit RuntimeInvisible ones.
*
* @param attribute
* @return true if runtime visible annotation
*/
public static boolean acceptAttribute(Attribute attribute) {
return (attribute instanceof RuntimeVisAnnos);
}
/**
* Extract class level annotations and turn them into AjAttributes.
*
* @param javaClass
* @param type
* @param context
* @param msgHandler
* @return list of AjAttributes
*/
public static List readAj5ClassAttributes(AsmManager model, JavaClass javaClass, ReferenceType type,
ISourceContext context, IMessageHandler msgHandler, boolean isCodeStyleAspect) {
boolean ignoreThisClass = javaClass.getClassName().charAt(0) == PACKAGE_INITIAL_CHAR
&& javaClass.getClassName().startsWith(ASPECTJ_ANNOTATION_PACKAGE);
if (ignoreThisClass) {
return NO_ATTRIBUTES;
}
boolean containsPointcut = false;
boolean containsAnnotationClassReference = false;
Constant[] cpool = javaClass.getConstantPool().getConstantPool();
for (int i = 0; i < cpool.length; i++) {
Constant constant = cpool[i];
if (constant != null && constant.getTag() == Constants.CONSTANT_Utf8) {
String constantValue = ((ConstantUtf8) constant).getValue();
if (constantValue.length() > 28 && constantValue.charAt(1) == PACKAGE_INITIAL_CHAR) {
if (constantValue.startsWith("Lorg/aspectj/lang/annotation")) {
containsAnnotationClassReference = true;
if ("Lorg/aspectj/lang/annotation/DeclareAnnotation;".equals(constantValue)) {
msgHandler.handleMessage(new Message(
"Found @DeclareAnnotation while current release does not support it (see '" + type.getName()
+ "')", IMessage.WARNING, null, type.getSourceLocation()));
}
if ("Lorg/aspectj/lang/annotation/Pointcut;".equals(constantValue)) {
containsPointcut = true;
}
}
}
}
}
if (!containsAnnotationClassReference) {
return NO_ATTRIBUTES;
}
AjAttributeStruct struct = new AjAttributeStruct(type, context, msgHandler);
Attribute[] attributes = javaClass.getAttributes();
boolean hasAtAspectAnnotation = false;
boolean hasAtPrecedenceAnnotation = false;
WeaverVersionInfo wvinfo = null;
for (int i = 0; i < attributes.length; i++) {
Attribute attribute = attributes[i];
if (acceptAttribute(attribute)) {
RuntimeAnnos rvs = (RuntimeAnnos) attribute;
// we don't need to look for several attribute occurrences since
// it cannot happen as per JSR175
if (!isCodeStyleAspect && !javaClass.isInterface()) {
hasAtAspectAnnotation = handleAspectAnnotation(rvs, struct);
// TODO AV - if put outside the if isCodeStyleAspect then we
// would enable mix style
hasAtPrecedenceAnnotation = handlePrecedenceAnnotation(rvs, struct);
}
// there can only be one RuntimeVisible bytecode attribute
break;
}
}
for (int i = attributes.length - 1; i >= 0; i--) {
Attribute attribute = attributes[i];
if (attribute.getName().equals(WeaverVersionInfo.AttributeName)) {
try {
VersionedDataInputStream s = new VersionedDataInputStream(new ByteArrayInputStream(
((Unknown) attribute).getBytes()), null);
wvinfo = WeaverVersionInfo.read(s);
struct.ajAttributes.add(0, wvinfo);
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
if (wvinfo == null) {
// If we are in here due to a resetState() call (presumably because of reweavable state processing), the
// original type delegate will have been set with a version but that version will be missing from
// the new set of attributes (looks like a bug where the version attribute was not included in the
// data compressed into the attribute). So rather than 'defaulting' to current, we should use one
// if it set on the delegate for the type.
ReferenceTypeDelegate delegate = type.getDelegate();
if (delegate instanceof BcelObjectType) {
wvinfo = ((BcelObjectType) delegate).getWeaverVersionAttribute();
if (wvinfo != null) {
if (wvinfo.getMajorVersion() != WeaverVersionInfo.WEAVER_VERSION_MAJOR_UNKNOWN) {
// use this one
struct.ajAttributes.add(0, wvinfo);
} else {
wvinfo = null;
}
}
}
if (wvinfo == null) {
struct.ajAttributes.add(0, wvinfo = new AjAttribute.WeaverVersionInfo());
}
}
// basic semantic check
if (hasAtPrecedenceAnnotation && !hasAtAspectAnnotation) {
msgHandler.handleMessage(new Message("Found @DeclarePrecedence on a non @Aspect type '" + type.getName() + "'",
IMessage.WARNING, null, type.getSourceLocation()));
// bypass what we have read
return NO_ATTRIBUTES;
}
// the following block will not detect @Pointcut in non @Aspect types
// for optimization purpose
if (!(hasAtAspectAnnotation || isCodeStyleAspect) && !containsPointcut) {
return NO_ATTRIBUTES;
}
// FIXME AV - turn on when ajcMightHaveAspect
// if (hasAtAspectAnnotation && type.isInterface()) {
// msgHandler.handleMessage(
// new Message(
// "Found @Aspect on an interface type '" + type.getName() + "'",
// IMessage.WARNING,
// null,
// type.getSourceLocation()
// )
// );
// // bypass what we have read
// return EMPTY_LIST;
// }
// semantic check: @Aspect must be public
// FIXME AV - do we really want to enforce that?
// if (hasAtAspectAnnotation && !javaClass.isPublic()) {
// msgHandler.handleMessage(
// new Message(
// "Found @Aspect annotation on a non public class '" +
// javaClass.getClassName() + "'",
// IMessage.ERROR,
// null,
// type.getSourceLocation()
// )
// );
// return EMPTY_LIST;
// }
// code style pointcuts are class attributes
// we need to gather the @AJ pointcut right now and not at method level
// annotation extraction time
// in order to be able to resolve the pointcut references later on
// we don't need to look in super class, the pointcut reference in the
// grammar will do it
for (int i = 0; i < javaClass.getMethods().length; i++) {
Method method = javaClass.getMethods()[i];
if (method.getName().startsWith(NameMangler.PREFIX)) {
continue; // already dealt with by ajc...
}
// FIXME alex optimize, this method struct will gets recreated for
// advice extraction
AjAttributeMethodStruct mstruct = null;
boolean processedPointcut = false;
Attribute[] mattributes = method.getAttributes();
for (int j = 0; j < mattributes.length; j++) {
Attribute mattribute = mattributes[j];
if (acceptAttribute(mattribute)) {
// TODO speed all this nonsense up rather than looking
// through all the annotations every time
// same for fields
mstruct = new AjAttributeMethodStruct(method, null, type, context, msgHandler);
processedPointcut = handlePointcutAnnotation((RuntimeAnnos) mattribute, mstruct);
if (!processedPointcut) {
processedPointcut = handleDeclareMixinAnnotation((RuntimeAnnos) mattribute, mstruct);
}
// there can only be one RuntimeVisible bytecode attribute
break;
}
}
if (processedPointcut) {
struct.ajAttributes.addAll(mstruct.ajAttributes);
}
}
// code style declare error / warning / implements / parents are field
// attributes
Field[] fs = javaClass.getFields();
for (int i = 0; i < fs.length; i++) {
Field field = fs[i];
if (field.getName().startsWith(NameMangler.PREFIX)) {
continue; // already dealt with by ajc...
}
// FIXME alex optimize, this method struct will gets recreated for
// advice extraction
AjAttributeFieldStruct fstruct = new AjAttributeFieldStruct(field, null, type, context, msgHandler);
Attribute[] fattributes = field.getAttributes();
for (int j = 0; j < fattributes.length; j++) {
Attribute fattribute = fattributes[j];
if (acceptAttribute(fattribute)) {
RuntimeAnnos frvs = (RuntimeAnnos) fattribute;
if (handleDeclareErrorOrWarningAnnotation(model, frvs, fstruct)
|| handleDeclareParentsAnnotation(frvs, fstruct)) {
// semantic check - must be in an @Aspect [remove if
// previous block bypassed in advance]
if (!type.isAnnotationStyleAspect() && !isCodeStyleAspect) {
msgHandler.handleMessage(new Message("Found @AspectJ annotations in a non @Aspect type '"
+ type.getName() + "'", IMessage.WARNING, null, type.getSourceLocation()));
// go ahead
}
}
// there can only be one RuntimeVisible bytecode attribute
break;
}
}
struct.ajAttributes.addAll(fstruct.ajAttributes);
}
return struct.ajAttributes;
}
/**
* Extract method level annotations and turn them into AjAttributes.
*
* @param method
* @param type
* @param context
* @param msgHandler
* @return list of AjAttributes
*/
public static List readAj5MethodAttributes(Method method, BcelMethod bMethod, ResolvedType type,
ResolvedPointcutDefinition preResolvedPointcut, ISourceContext context, IMessageHandler msgHandler) {
if (method.getName().startsWith(NameMangler.PREFIX)) {
return Collections.emptyList(); // already dealt with by ajc...
}
AjAttributeMethodStruct struct = new AjAttributeMethodStruct(method, bMethod, type, context, msgHandler);
Attribute[] attributes = method.getAttributes();
// we remember if we found one @AJ annotation for minimal semantic error
// reporting
// the real reporting beeing done thru AJDT and the compiler mapping @AJ
// to AjAtttribute
// or thru APT
//
// Note: we could actually skip the whole thing if type is not itself an
// @Aspect
// but then we would not see any warning. We do bypass for pointcut but
// not for advice since it would
// be too silent.
boolean hasAtAspectJAnnotation = false;
boolean hasAtAspectJAnnotationMustReturnVoid = false;
for (int i = 0; i < attributes.length; i++) {
Attribute attribute = attributes[i];
try {
if (acceptAttribute(attribute)) {
RuntimeAnnos rvs = (RuntimeAnnos) attribute;
hasAtAspectJAnnotationMustReturnVoid = hasAtAspectJAnnotationMustReturnVoid
|| handleBeforeAnnotation(rvs, struct, preResolvedPointcut);
hasAtAspectJAnnotationMustReturnVoid = hasAtAspectJAnnotationMustReturnVoid
|| handleAfterAnnotation(rvs, struct, preResolvedPointcut);
hasAtAspectJAnnotationMustReturnVoid = hasAtAspectJAnnotationMustReturnVoid
|| handleAfterReturningAnnotation(rvs, struct, preResolvedPointcut, bMethod);
hasAtAspectJAnnotationMustReturnVoid = hasAtAspectJAnnotationMustReturnVoid
|| handleAfterThrowingAnnotation(rvs, struct, preResolvedPointcut, bMethod);
hasAtAspectJAnnotation = hasAtAspectJAnnotation || handleAroundAnnotation(rvs, struct, preResolvedPointcut);
// there can only be one RuntimeVisible bytecode attribute
break;
}
} catch (ReturningFormalNotDeclaredInAdviceSignatureException e) {
msgHandler.handleMessage(new Message(WeaverMessages.format(WeaverMessages.RETURNING_FORMAL_NOT_DECLARED_IN_ADVICE,
e.getFormalName()), IMessage.ERROR, null, bMethod.getSourceLocation()));
} catch (ThrownFormalNotDeclaredInAdviceSignatureException e) {
msgHandler.handleMessage(new Message(WeaverMessages.format(WeaverMessages.THROWN_FORMAL_NOT_DECLARED_IN_ADVICE,
e.getFormalName()), IMessage.ERROR, null, bMethod.getSourceLocation()));
}
}
hasAtAspectJAnnotation = hasAtAspectJAnnotation || hasAtAspectJAnnotationMustReturnVoid;
// semantic check - must be in an @Aspect [remove if previous block
// bypassed in advance]
if (hasAtAspectJAnnotation && !type.isAspect()) { // isAnnotationStyleAspect())
// {
msgHandler.handleMessage(new Message("Found @AspectJ annotations in a non @Aspect type '" + type.getName() + "'",
IMessage.WARNING, null, type.getSourceLocation()));
// go ahead
}
// semantic check - advice must be public
if (hasAtAspectJAnnotation && !struct.method.isPublic()) {
msgHandler.handleMessage(new Message("Found @AspectJ annotation on a non public advice '"
+ methodToString(struct.method) + "'", IMessage.ERROR, null, type.getSourceLocation()));
// go ahead
}
// semantic check - advice must not be static
if (hasAtAspectJAnnotation && struct.method.isStatic()) {
msgHandler.handleMessage(MessageUtil.error("Advice cannot be declared static '" + methodToString(struct.method) + "'",
type.getSourceLocation()));
// new Message(
// "Advice cannot be declared static '" +
// methodToString(struct.method) + "'",
// IMessage.ERROR,
// null,
// type.getSourceLocation()
// )
// );
// go ahead
}
// semantic check for non around advice must return void
if (hasAtAspectJAnnotationMustReturnVoid && !Type.VOID.equals(struct.method.getReturnType())) {
msgHandler.handleMessage(new Message("Found @AspectJ annotation on a non around advice not returning void '"
+ methodToString(struct.method) + "'", IMessage.ERROR, null, type.getSourceLocation()));
// go ahead
}
return struct.ajAttributes;
}
/**
* Extract field level annotations and turn them into AjAttributes.
*
* @param field
* @param type
* @param context
* @param msgHandler
* @return list of AjAttributes, always empty for now
*/
public static List readAj5FieldAttributes(Field field, BcelField bField, ResolvedType type,
ISourceContext context, IMessageHandler msgHandler) {
// Note: field annotation are for ITD and DEOW - processed at class
// level directly
return Collections.emptyList();
}
/**
* Read @Aspect
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handleAspectAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeStruct struct) {
AnnotationGen aspect = getAnnotation(runtimeAnnotations, AjcMemberMaker.ASPECT_ANNOTATION);
if (aspect != null) {
// semantic check for inheritance (only one level up)
boolean extendsAspect = false;
if (!"java.lang.Object".equals(struct.enclosingType.getSuperclass().getName())) {
if (!struct.enclosingType.getSuperclass().isAbstract() && struct.enclosingType.getSuperclass().isAspect()) {
reportError("cannot extend a concrete aspect", struct);
return false;
}
extendsAspect = struct.enclosingType.getSuperclass().isAspect();
}
NameValuePair aspectPerClause = getAnnotationElement(aspect, VALUE);
final PerClause perClause;
if (aspectPerClause == null) {
// empty value means singleton unless inherited
if (!extendsAspect) {
perClause = new PerSingleton();
} else {
perClause = new PerFromSuper(struct.enclosingType.getSuperclass().getPerClause().getKind());
}
} else {
String perX = aspectPerClause.getValue().stringifyValue();
if (perX == null || perX.length() <= 0) {
perClause = new PerSingleton();
} else {
perClause = parsePerClausePointcut(perX, struct);
}
}
if (perClause == null) {
// could not parse it, ignore the aspect
return false;
} else {
perClause.setLocation(struct.context, -1, -1);// struct.context.getOffset(),
// struct.context.getOffset()+1);//FIXME
// AVASM
// Not setting version here
// struct.ajAttributes.add(new AjAttribute.WeaverVersionInfo());
AjAttribute.Aspect aspectAttribute = new AjAttribute.Aspect(perClause);
struct.ajAttributes.add(aspectAttribute);
FormalBinding[] bindings = new org.aspectj.weaver.patterns.FormalBinding[0];
final IScope binding;
binding = new BindingScope(struct.enclosingType, struct.context, bindings);
// // we can't resolve here since the perclause typically refers
// to pointcuts
// // defined in the aspect that we haven't told the
// BcelObjectType about yet.
//
// perClause.resolve(binding);
// so we prepare to do it later...
aspectAttribute.setResolutionScope(binding);
return true;
}
}
return false;
}
/**
* Read a perClause, returns null on failure and issue messages
*
* @param perClauseString like "pertarget(.....)"
* @param struct for which we are parsing the per clause
* @return a PerClause instance
*/
private static PerClause parsePerClausePointcut(String perClauseString, AjAttributeStruct struct) {
final String pointcutString;
Pointcut pointcut = null;
TypePattern typePattern = null;
final PerClause perClause;
if (perClauseString.startsWith(PerClause.KindAnnotationPrefix.PERCFLOW.getName())) {
pointcutString = PerClause.KindAnnotationPrefix.PERCFLOW.extractPointcut(perClauseString);
pointcut = parsePointcut(pointcutString, struct, false);
perClause = new PerCflow(pointcut, false);
} else if (perClauseString.startsWith(PerClause.KindAnnotationPrefix.PERCFLOWBELOW.getName())) {
pointcutString = PerClause.KindAnnotationPrefix.PERCFLOWBELOW.extractPointcut(perClauseString);
pointcut = parsePointcut(pointcutString, struct, false);
perClause = new PerCflow(pointcut, true);
} else if (perClauseString.startsWith(PerClause.KindAnnotationPrefix.PERTARGET.getName())) {
pointcutString = PerClause.KindAnnotationPrefix.PERTARGET.extractPointcut(perClauseString);
pointcut = parsePointcut(pointcutString, struct, false);
perClause = new PerObject(pointcut, false);
} else if (perClauseString.startsWith(PerClause.KindAnnotationPrefix.PERTHIS.getName())) {
pointcutString = PerClause.KindAnnotationPrefix.PERTHIS.extractPointcut(perClauseString);
pointcut = parsePointcut(pointcutString, struct, false);
perClause = new PerObject(pointcut, true);
} else if (perClauseString.startsWith(PerClause.KindAnnotationPrefix.PERTYPEWITHIN.getName())) {
pointcutString = PerClause.KindAnnotationPrefix.PERTYPEWITHIN.extractPointcut(perClauseString);
typePattern = parseTypePattern(pointcutString, struct);
perClause = new PerTypeWithin(typePattern);
} else if (perClauseString.equalsIgnoreCase(PerClause.SINGLETON.getName() + "()")) {
perClause = new PerSingleton();
} else {
// could not parse the @AJ perclause - fallback to singleton and
// issue an error
reportError("@Aspect per clause cannot be read '" + perClauseString + "'", struct);
return null;
}
if (!PerClause.SINGLETON.equals(perClause.getKind()) && !PerClause.PERTYPEWITHIN.equals(perClause.getKind())
&& pointcut == null) {
// we could not parse the pointcut
return null;
}
if (PerClause.PERTYPEWITHIN.equals(perClause.getKind()) && typePattern == null) {
// we could not parse the type pattern
return null;
}
return perClause;
}
/**
* Read @DeclarePrecedence
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handlePrecedenceAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeStruct struct) {
AnnotationGen aspect = getAnnotation(runtimeAnnotations, AjcMemberMaker.DECLAREPRECEDENCE_ANNOTATION);
if (aspect != null) {
NameValuePair precedence = getAnnotationElement(aspect, VALUE);
if (precedence != null) {
String precedencePattern = precedence.getValue().stringifyValue();
PatternParser parser = new PatternParser(precedencePattern);
DeclarePrecedence ajPrecedence = parser.parseDominates();
struct.ajAttributes.add(new AjAttribute.DeclareAttribute(ajPrecedence));
return true;
}
}
return false;
}
// /**
// * Read @DeclareImplements
// *
// * @param runtimeAnnotations
// * @param struct
// * @return true if found
// */
// private static boolean
// handleDeclareImplementsAnnotation(RuntimeAnnotations runtimeAnnotations,
// AjAttributeFieldStruct
// struct) {//, ResolvedPointcutDefinition preResolvedPointcut) {
// Annotation deci = getAnnotation(runtimeAnnotations,
// AjcMemberMaker.DECLAREIMPLEMENTS_ANNOTATION);
// if (deci != null) {
// ElementNameValuePairGen deciPatternNVP = getAnnotationElement(deci,
// VALUE);
// String deciPattern = deciPatternNVP.getValue().stringifyValue();
// if (deciPattern != null) {
// TypePattern typePattern = parseTypePattern(deciPattern, struct);
// ResolvedType fieldType =
// UnresolvedType.forSignature(struct.field.getSignature()).resolve(struct.enclosingType.getWorld());
// if (fieldType.isPrimitiveType()) {
// return false;
// } else if (fieldType.isInterface()) {
// TypePattern parent = new
// ExactTypePattern(UnresolvedType.forSignature(struct.field.getSignature()),
// false, false);
// parent.resolve(struct.enclosingType.getWorld());
// List parents = new ArrayList(1);
// parents.add(parent);
// //TODO kick ISourceLocation sl = struct.bField.getSourceLocation(); ??
// struct.ajAttributes.add(
// new AjAttribute.DeclareAttribute(
// new DeclareParents(
// typePattern,
// parents,
// false
// )
// )
// );
// return true;
// } else {
// reportError("@DeclareImplements: can only be used on field whose type is an interface",
// struct);
// return false;
// }
// }
// }
// return false;
// }
/**
* Read @DeclareParents
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handleDeclareParentsAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeFieldStruct struct) {// ,
// ResolvedPointcutDefinition
// preResolvedPointcut)
// {
AnnotationGen decp = getAnnotation(runtimeAnnotations, AjcMemberMaker.DECLAREPARENTS_ANNOTATION);
if (decp != null) {
NameValuePair decpPatternNVP = getAnnotationElement(decp, VALUE);
String decpPattern = decpPatternNVP.getValue().stringifyValue();
if (decpPattern != null) {
TypePattern typePattern = parseTypePattern(decpPattern, struct);
ResolvedType fieldType = UnresolvedType.forSignature(struct.field.getSignature()).resolve(
struct.enclosingType.getWorld());
if (fieldType.isParameterizedOrRawType()) {
fieldType = fieldType.getGenericType();
}
if (fieldType.isInterface()) {
TypePattern parent = parseTypePattern(fieldType.getName(), struct);
FormalBinding[] bindings = new org.aspectj.weaver.patterns.FormalBinding[0];
IScope binding = new BindingScope(struct.enclosingType, struct.context, bindings);
// first add the declare implements like
List parents = new ArrayList(1);
parents.add(parent);
DeclareParents dp = new DeclareParents(typePattern, parents, false);
dp.resolve(binding); // resolves the parent and child parts of the decp
// resolve this so that we can use it for the
// MethodDelegateMungers below.
// eg. '@Coloured *' will change from a WildTypePattern to
// an 'AnyWithAnnotationTypePattern' after this resolution
typePattern = dp.getChild(); // this retrieves the resolved version
// TODO kick ISourceLocation sl =
// struct.bField.getSourceLocation(); ??
// dp.setLocation(dp.getDeclaringType().getSourceContext(),
// dp.getDeclaringType().getSourceLocation().getOffset(),
// dp.getDeclaringType().getSourceLocation().getOffset());
dp.setLocation(struct.context, -1, -1); // not ideal...
struct.ajAttributes.add(new AjAttribute.DeclareAttribute(dp));
// do we have a defaultImpl=xxx.class (ie implementation)
String defaultImplClassName = null;
NameValuePair defaultImplNVP = getAnnotationElement(decp, "defaultImpl");
if (defaultImplNVP != null) {
ClassElementValue defaultImpl = (ClassElementValue) defaultImplNVP.getValue();
defaultImplClassName = UnresolvedType.forSignature(defaultImpl.getClassString()).getName();
if (defaultImplClassName.equals("org.aspectj.lang.annotation.DeclareParents")) {
defaultImplClassName = null;
} else {
// check public no arg ctor
ResolvedType impl = struct.enclosingType.getWorld().resolve(defaultImplClassName, false);
ResolvedMember[] mm = impl.getDeclaredMethods();
int implModifiers = impl.getModifiers();
boolean defaultVisibilityImpl = !(Modifier.isPrivate(implModifiers)
|| Modifier.isProtected(implModifiers) || Modifier.isPublic(implModifiers));
boolean hasNoCtorOrANoArgOne = true;
ResolvedMember foundOneOfIncorrectVisibility = null;
for (int i = 0; i < mm.length; i++) {
ResolvedMember resolvedMember = mm[i];
if (resolvedMember.getName().equals("")) {
hasNoCtorOrANoArgOne = false;
if (resolvedMember.getParameterTypes().length == 0) {
if (defaultVisibilityImpl) { // default visibility implementation
if (resolvedMember.isPublic() || resolvedMember.isDefault()) {
hasNoCtorOrANoArgOne = true;
} else {
foundOneOfIncorrectVisibility = resolvedMember;
}
} else if (Modifier.isPublic(implModifiers)) { // public
// implementation
if (resolvedMember.isPublic()) {
hasNoCtorOrANoArgOne = true;
} else {
foundOneOfIncorrectVisibility = resolvedMember;
}
}
}
}
if (hasNoCtorOrANoArgOne) {
break;
}
}
if (!hasNoCtorOrANoArgOne) {
if (foundOneOfIncorrectVisibility != null) {
reportError(
"@DeclareParents: defaultImpl=\""
+ defaultImplClassName
+ "\" has a no argument constructor, but it is of incorrect visibility. It must be at least as visible as the type.",
struct);
} else {
reportError("@DeclareParents: defaultImpl=\"" + defaultImplClassName
+ "\" has no public no-arg constructor", struct);
}
}
if (!fieldType.isAssignableFrom(impl)) {
reportError("@DeclareParents: defaultImpl=\"" + defaultImplClassName
+ "\" does not implement the interface '" + fieldType.toString() + "'", struct);
}
}
}
// then iterate on field interface hierarchy (not object)
boolean hasAtLeastOneMethod = false;
Iterator methodIterator = fieldType.getMethodsIncludingIntertypeDeclarations(false, true);
while (methodIterator.hasNext()) {
ResolvedMember method = methodIterator.next();
if (method.isAbstract()) {
// moved to be detected at weave time if the target
// doesnt implement the methods
// if (defaultImplClassName == null) {
// // non marker interface with no default impl
// provided
// reportError("@DeclareParents: used with a non marker interface and no defaultImpl=\"...\" provided",
// struct);
// return false;
// }
hasAtLeastOneMethod = true;
// What we are saying here:
// We have this method 'method' and we want to put a
// forwarding method into a type that matches
// typePattern that should delegate to the version
// of the method in 'defaultImplClassName'
// Now the method may be from a supertype but the
// declaring type of the method we pass into the
// type
// munger is what is used to determine the type of
// the field that hosts the delegate instance.
// So here we create a modified method with an
// alternative declaring type so that we lookup
// the right field. See pr164016.
MethodDelegateTypeMunger mdtm = new MethodDelegateTypeMunger(method, struct.enclosingType, defaultImplClassName, typePattern);
mdtm.setFieldType(fieldType);
mdtm.setSourceLocation(struct.enclosingType.getSourceLocation());
struct.ajAttributes.add(new AjAttribute.TypeMunger(mdtm));
}
}
// successful so far, we thus need a bcel type munger to have
// a field hosting the mixin in the target type
if (hasAtLeastOneMethod && defaultImplClassName != null) {
ResolvedMember fieldHost = AjcMemberMaker.itdAtDeclareParentsField(null, fieldType, struct.enclosingType);
struct.ajAttributes.add(new AjAttribute.TypeMunger(new MethodDelegateTypeMunger.FieldHostTypeMunger(
fieldHost, struct.enclosingType, typePattern)));
}
return true;
} else {
reportError("@DeclareParents: can only be used on a field whose type is an interface", struct);
return false;
}
}
}
return false;
}
/**
* Return a nicely formatted method string, for example: int X.foo(java.lang.String)
*/
public static String getMethodForMessage(AjAttributeMethodStruct methodstructure) {
StringBuffer sb = new StringBuffer();
sb.append("Method '");
sb.append(methodstructure.method.getReturnType().toString());
sb.append(" ").append(methodstructure.enclosingType).append(".").append(methodstructure.method.getName());
sb.append("(");
Type[] args = methodstructure.method.getArgumentTypes();
if (args != null) {
for (int t = 0; t < args.length; t++) {
if (t > 0) {
sb.append(",");
}
sb.append(args[t].toString());
}
}
sb.append(")'");
return sb.toString();
}
/**
* Process any @DeclareMixin annotation.
*
* Example Declaration
*
* @DeclareMixin("Foo+") public I createImpl(Object o) { return new Impl(o); }
*
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handleDeclareMixinAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeMethodStruct struct) {
AnnotationGen declareMixinAnnotation = getAnnotation(runtimeAnnotations, AjcMemberMaker.DECLAREMIXIN_ANNOTATION);
if (declareMixinAnnotation == null) {
// No annotation found
return false;
}
Method annotatedMethod = struct.method;
World world = struct.enclosingType.getWorld();
NameValuePair declareMixinPatternNameValuePair = getAnnotationElement(declareMixinAnnotation, VALUE);
// declareMixinPattern could be of the form "Bar*" or "A || B" or "Foo+"
String declareMixinPattern = declareMixinPatternNameValuePair.getValue().stringifyValue();
TypePattern targetTypePattern = parseTypePattern(declareMixinPattern, struct);
// Return value of the annotated method is the interface or class that the mixin delegate should have
ResolvedType methodReturnType = UnresolvedType.forSignature(annotatedMethod.getReturnType().getSignature()).resolve(world);
if (methodReturnType.isParameterizedOrRawType()) {
methodReturnType = methodReturnType.getGenericType();
}
if (methodReturnType.isPrimitiveType()) {
reportError(getMethodForMessage(struct) + ": factory methods for a mixin cannot return void or a primitive type",
struct);
return false;
}
if (annotatedMethod.getArgumentTypes().length > 1) {
reportError(getMethodForMessage(struct) + ": factory methods for a mixin can take a maximum of one parameter", struct);
return false;
}
// The set of interfaces to be mixed in is either:
// supplied as a list in the 'Class[] interfaces' value in the annotation value
// supplied as just the interface return value of the annotated method
// supplied as just the class return value of the annotated method
NameValuePair interfaceListSpecified = getAnnotationElement(declareMixinAnnotation, "interfaces");
List newParents = new ArrayList(1);
List newInterfaceTypes = new ArrayList(1);
if (interfaceListSpecified != null) {
ArrayElementValue arrayOfInterfaceTypes = (ArrayElementValue) interfaceListSpecified.getValue();
int numberOfTypes = arrayOfInterfaceTypes.getElementValuesArraySize();
ElementValue[] theTypes = arrayOfInterfaceTypes.getElementValuesArray();
for (int i = 0; i < numberOfTypes; i++) {
ClassElementValue interfaceType = (ClassElementValue) theTypes[i];
// Check: needs to be resolvable
// TODO crappy replace required
ResolvedType ajInterfaceType = UnresolvedType.forSignature(interfaceType.getClassString().replace("/", "."))
.resolve(world);
if (ajInterfaceType.isMissing() || !ajInterfaceType.isInterface()) {
reportError(
"Types listed in the 'interfaces' DeclareMixin annotation value must be valid interfaces. This is invalid: "
+ ajInterfaceType.getName(), struct); // TODO better error location, use the method position
return false;
}
if (!ajInterfaceType.isAssignableFrom(methodReturnType)) {
reportError(getMethodForMessage(struct) + ": factory method does not return something that implements '"
+ ajInterfaceType.getName() + "'", struct);
return false;
}
newInterfaceTypes.add(ajInterfaceType);
// Checking that it is a superinterface of the methods return value is done at weave time
TypePattern newParent = parseTypePattern(ajInterfaceType.getName(), struct);
newParents.add(newParent);
}
} else {
if (methodReturnType.isClass()) {
reportError(
getMethodForMessage(struct)
+ ": factory methods for a mixin must either return an interface type or specify interfaces in the annotation and return a class",
struct);
return false;
}
// Use the method return type: this might be a class or an interface
TypePattern newParent = parseTypePattern(methodReturnType.getName(), struct);
newInterfaceTypes.add(methodReturnType);
newParents.add(newParent);
}
if (newParents.size() == 0) {
// Warning: did they foolishly put @DeclareMixin(value="Bar+",interfaces={})
// TODO output warning
return false;
}
// Create the declare parents that will add the interfaces to matching targets
FormalBinding[] bindings = new org.aspectj.weaver.patterns.FormalBinding[0];
IScope binding = new BindingScope(struct.enclosingType, struct.context, bindings);
// how do we mark this as a decp due to decmixin?
DeclareParents dp = new DeclareParentsMixin(targetTypePattern, newParents);
dp.resolve(binding);
targetTypePattern = dp.getChild();
dp.setLocation(struct.context, -1, -1); // not ideal...
struct.ajAttributes.add(new AjAttribute.DeclareAttribute(dp));
// The factory method for building the implementation is the
// one attached to the annotation:
// Method implementationFactory = struct.method;
boolean hasAtLeastOneMethod = false;
for (Iterator iterator = newInterfaceTypes.iterator(); iterator.hasNext();) {
ResolvedType typeForDelegation = iterator.next();
// TODO check for overlapping interfaces. Eg. A implements I, I extends J - if they specify interfaces={I,J} we dont
// want to do any methods twice
ResolvedMember[] methods = typeForDelegation.getMethodsWithoutIterator(true, false, false).toArray(
new ResolvedMember[0]);
for (int i = 0; i < methods.length; i++) {
ResolvedMember method = methods[i];
if (method.isAbstract()) {
hasAtLeastOneMethod = true;
if (method.hasBackingGenericMember()) {
method = method.getBackingGenericMember();
}
MethodDelegateTypeMunger mdtm = new MethodDelegateTypeMunger(method, struct.enclosingType, "",
targetTypePattern, struct.method.getName(), struct.method.getSignature());
mdtm.setFieldType(methodReturnType);
mdtm.setSourceLocation(struct.enclosingType.getSourceLocation());
struct.ajAttributes.add(new AjAttribute.TypeMunger(mdtm));
}
}
}
// if any method delegate was created then a field to hold the delegate instance must also be added
if (hasAtLeastOneMethod) {
ResolvedMember fieldHost = AjcMemberMaker.itdAtDeclareParentsField(null, methodReturnType, struct.enclosingType);
struct.ajAttributes.add(new AjAttribute.TypeMunger(new MethodDelegateTypeMunger.FieldHostTypeMunger(fieldHost,
struct.enclosingType, targetTypePattern)));
}
return true;
}
/**
* Read @Before
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handleBeforeAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeMethodStruct struct,
ResolvedPointcutDefinition preResolvedPointcut) {
AnnotationGen before = getAnnotation(runtimeAnnotations, AjcMemberMaker.BEFORE_ANNOTATION);
if (before != null) {
NameValuePair beforeAdvice = getAnnotationElement(before, VALUE);
if (beforeAdvice != null) {
// this/target/args binding
String argumentNames = getArgNamesValue(before);
if (argumentNames != null) {
struct.unparsedArgumentNames = argumentNames;
}
FormalBinding[] bindings = new org.aspectj.weaver.patterns.FormalBinding[0];
try {
bindings = extractBindings(struct);
} catch (UnreadableDebugInfoException unreadableDebugInfoException) {
return false;
}
IScope binding = new BindingScope(struct.enclosingType, struct.context, bindings);
// joinpoint, staticJoinpoint binding
int extraArgument = extractExtraArgument(struct.method);
Pointcut pc = null;
if (preResolvedPointcut != null) {
pc = preResolvedPointcut.getPointcut();
// pc.resolve(binding);
} else {
pc = parsePointcut(beforeAdvice.getValue().stringifyValue(), struct, false);
if (pc == null) {
return false;// parse error
}
pc = pc.resolve(binding);
}
setIgnoreUnboundBindingNames(pc, bindings);
ISourceLocation sl = struct.context.makeSourceLocation(struct.bMethod.getDeclarationLineNumber(),
struct.bMethod.getDeclarationOffset());
struct.ajAttributes.add(new AjAttribute.AdviceAttribute(AdviceKind.Before, pc, extraArgument, sl.getOffset(), sl
.getOffset() + 1,// FIXME AVASM
struct.context));
return true;
}
}
return false;
}
/**
* Read @After
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handleAfterAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeMethodStruct struct,
ResolvedPointcutDefinition preResolvedPointcut) {
AnnotationGen after = getAnnotation(runtimeAnnotations, AjcMemberMaker.AFTER_ANNOTATION);
if (after != null) {
NameValuePair afterAdvice = getAnnotationElement(after, VALUE);
if (afterAdvice != null) {
// this/target/args binding
FormalBinding[] bindings = new org.aspectj.weaver.patterns.FormalBinding[0];
String argumentNames = getArgNamesValue(after);
if (argumentNames != null) {
struct.unparsedArgumentNames = argumentNames;
}
try {
bindings = extractBindings(struct);
} catch (UnreadableDebugInfoException unreadableDebugInfoException) {
return false;
}
IScope binding = new BindingScope(struct.enclosingType, struct.context, bindings);
// joinpoint, staticJoinpoint binding
int extraArgument = extractExtraArgument(struct.method);
Pointcut pc = null;
if (preResolvedPointcut != null) {
pc = preResolvedPointcut.getPointcut();
} else {
pc = parsePointcut(afterAdvice.getValue().stringifyValue(), struct, false);
if (pc == null) {
return false;// parse error
}
pc.resolve(binding);
}
setIgnoreUnboundBindingNames(pc, bindings);
ISourceLocation sl = struct.context.makeSourceLocation(struct.bMethod.getDeclarationLineNumber(),
struct.bMethod.getDeclarationOffset());
struct.ajAttributes.add(new AjAttribute.AdviceAttribute(AdviceKind.After, pc, extraArgument, sl.getOffset(), sl
.getOffset() + 1,// FIXME AVASM
struct.context));
return true;
}
}
return false;
}
/**
* Read @AfterReturning
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handleAfterReturningAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeMethodStruct struct,
ResolvedPointcutDefinition preResolvedPointcut, BcelMethod owningMethod)
throws ReturningFormalNotDeclaredInAdviceSignatureException {
AnnotationGen after = getAnnotation(runtimeAnnotations, AjcMemberMaker.AFTERRETURNING_ANNOTATION);
if (after != null) {
NameValuePair annValue = getAnnotationElement(after, VALUE);
NameValuePair annPointcut = getAnnotationElement(after, POINTCUT);
NameValuePair annReturned = getAnnotationElement(after, RETURNING);
// extract the pointcut and returned type/binding - do some checks
String pointcut = null;
String returned = null;
if ((annValue != null && annPointcut != null) || (annValue == null && annPointcut == null)) {
reportError("@AfterReturning: either 'value' or 'poincut' must be provided, not both", struct);
return false;
}
if (annValue != null) {
pointcut = annValue.getValue().stringifyValue();
} else {
pointcut = annPointcut.getValue().stringifyValue();
}
if (isNullOrEmpty(pointcut)) {
reportError("@AfterReturning: either 'value' or 'poincut' must be provided, not both", struct);
return false;
}
if (annReturned != null) {
returned = annReturned.getValue().stringifyValue();
if (isNullOrEmpty(returned)) {
returned = null;
} else {
// check that thrownFormal exists as the last parameter in
// the advice
String[] pNames = owningMethod.getParameterNames();
if (pNames == null || pNames.length == 0 || !Arrays.asList(pNames).contains(returned)) {
throw new ReturningFormalNotDeclaredInAdviceSignatureException(returned);
}
}
}
String argumentNames = getArgNamesValue(after);
if (argumentNames != null) {
struct.unparsedArgumentNames = argumentNames;
}
// this/target/args binding
// exclude the return binding from the pointcut binding since it is
// an extraArg binding
FormalBinding[] bindings = new org.aspectj.weaver.patterns.FormalBinding[0];
try {
bindings = (returned == null ? extractBindings(struct) : extractBindings(struct, returned));
} catch (UnreadableDebugInfoException unreadableDebugInfoException) {
return false;
}
IScope binding = new BindingScope(struct.enclosingType, struct.context, bindings);
// joinpoint, staticJoinpoint binding
int extraArgument = extractExtraArgument(struct.method);
// return binding
if (returned != null) {
extraArgument |= Advice.ExtraArgument;
}
Pointcut pc = null;
if (preResolvedPointcut != null) {
pc = preResolvedPointcut.getPointcut();
} else {
pc = parsePointcut(pointcut, struct, false);
if (pc == null) {
return false;// parse error
}
pc.resolve(binding);
}
setIgnoreUnboundBindingNames(pc, bindings);
ISourceLocation sl = struct.context.makeSourceLocation(struct.bMethod.getDeclarationLineNumber(),
struct.bMethod.getDeclarationOffset());
struct.ajAttributes.add(new AjAttribute.AdviceAttribute(AdviceKind.AfterReturning, pc, extraArgument, sl.getOffset(),
sl.getOffset() + 1,// FIXME AVASM
struct.context));
return true;
}
return false;
}
/**
* Read @AfterThrowing
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handleAfterThrowingAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeMethodStruct struct,
ResolvedPointcutDefinition preResolvedPointcut, BcelMethod owningMethod)
throws ThrownFormalNotDeclaredInAdviceSignatureException {
AnnotationGen after = getAnnotation(runtimeAnnotations, AjcMemberMaker.AFTERTHROWING_ANNOTATION);
if (after != null) {
NameValuePair annValue = getAnnotationElement(after, VALUE);
NameValuePair annPointcut = getAnnotationElement(after, POINTCUT);
NameValuePair annThrown = getAnnotationElement(after, THROWING);
// extract the pointcut and throwned type/binding - do some checks
String pointcut = null;
String thrownFormal = null;
if ((annValue != null && annPointcut != null) || (annValue == null && annPointcut == null)) {
reportError("@AfterThrowing: either 'value' or 'poincut' must be provided, not both", struct);
return false;
}
if (annValue != null) {
pointcut = annValue.getValue().stringifyValue();
} else {
pointcut = annPointcut.getValue().stringifyValue();
}
if (isNullOrEmpty(pointcut)) {
reportError("@AfterThrowing: either 'value' or 'poincut' must be provided, not both", struct);
return false;
}
if (annThrown != null) {
thrownFormal = annThrown.getValue().stringifyValue();
if (isNullOrEmpty(thrownFormal)) {
thrownFormal = null;
} else {
// check that thrownFormal exists as the last parameter in
// the advice
String[] pNames = owningMethod.getParameterNames();
if (pNames == null || pNames.length == 0 || !Arrays.asList(pNames).contains(thrownFormal)) {
throw new ThrownFormalNotDeclaredInAdviceSignatureException(thrownFormal);
}
}
}
String argumentNames = getArgNamesValue(after);
if (argumentNames != null) {
struct.unparsedArgumentNames = argumentNames;
}
// this/target/args binding
// exclude the throwned binding from the pointcut binding since it
// is an extraArg binding
FormalBinding[] bindings = new org.aspectj.weaver.patterns.FormalBinding[0];
try {
bindings = (thrownFormal == null ? extractBindings(struct) : extractBindings(struct, thrownFormal));
} catch (UnreadableDebugInfoException unreadableDebugInfoException) {
return false;
}
IScope binding = new BindingScope(struct.enclosingType, struct.context, bindings);
// joinpoint, staticJoinpoint binding
int extraArgument = extractExtraArgument(struct.method);
// return binding
if (thrownFormal != null) {
extraArgument |= Advice.ExtraArgument;
}
Pointcut pc = null;
if (preResolvedPointcut != null) {
pc = preResolvedPointcut.getPointcut();
} else {
pc = parsePointcut(pointcut, struct, false);
if (pc == null) {
return false;// parse error
}
pc.resolve(binding);
}
setIgnoreUnboundBindingNames(pc, bindings);
ISourceLocation sl = struct.context.makeSourceLocation(struct.bMethod.getDeclarationLineNumber(),
struct.bMethod.getDeclarationOffset());
struct.ajAttributes.add(new AjAttribute.AdviceAttribute(AdviceKind.AfterThrowing, pc, extraArgument, sl.getOffset(), sl
.getOffset() + 1, struct.context));
return true;
}
return false;
}
/**
* Read @Around
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handleAroundAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeMethodStruct struct,
ResolvedPointcutDefinition preResolvedPointcut) {
AnnotationGen around = getAnnotation(runtimeAnnotations, AjcMemberMaker.AROUND_ANNOTATION);
if (around != null) {
NameValuePair aroundAdvice = getAnnotationElement(around, VALUE);
if (aroundAdvice != null) {
// this/target/args binding
String argumentNames = getArgNamesValue(around);
if (argumentNames != null) {
struct.unparsedArgumentNames = argumentNames;
}
FormalBinding[] bindings = new org.aspectj.weaver.patterns.FormalBinding[0];
try {
bindings = extractBindings(struct);
} catch (UnreadableDebugInfoException unreadableDebugInfoException) {
return false;
}
IScope binding = new BindingScope(struct.enclosingType, struct.context, bindings);
// joinpoint, staticJoinpoint binding
int extraArgument = extractExtraArgument(struct.method);
Pointcut pc = null;
if (preResolvedPointcut != null) {
pc = preResolvedPointcut.getPointcut();
} else {
pc = parsePointcut(aroundAdvice.getValue().stringifyValue(), struct, false);
if (pc == null) {
return false;// parse error
}
pc.resolve(binding);
}
setIgnoreUnboundBindingNames(pc, bindings);
ISourceLocation sl = struct.context.makeSourceLocation(struct.bMethod.getDeclarationLineNumber(),
struct.bMethod.getDeclarationOffset());
struct.ajAttributes.add(new AjAttribute.AdviceAttribute(AdviceKind.Around, pc, extraArgument, sl.getOffset(), sl
.getOffset() + 1,// FIXME AVASM
struct.context));
return true;
}
}
return false;
}
/**
* Read @Pointcut and handle the resolving in a lazy way to deal with pointcut references
*
* @param runtimeAnnotations
* @param struct
* @return true if a pointcut was handled
*/
private static boolean handlePointcutAnnotation(RuntimeAnnos runtimeAnnotations, AjAttributeMethodStruct struct) {
AnnotationGen pointcut = getAnnotation(runtimeAnnotations, AjcMemberMaker.POINTCUT_ANNOTATION);
if (pointcut == null) {
return false;
}
NameValuePair pointcutExpr = getAnnotationElement(pointcut, VALUE);
// semantic check: the method must return void, or be
// "public static boolean" for if() support
if (!(Type.VOID.equals(struct.method.getReturnType()) || (Type.BOOLEAN.equals(struct.method.getReturnType())
&& struct.method.isStatic() && struct.method.isPublic()))) {
reportWarning("Found @Pointcut on a method not returning 'void' or not 'public static boolean'", struct);
// no need to stop
}
// semantic check: the method must not throw anything
if (struct.method.getExceptionTable() != null) {
reportWarning("Found @Pointcut on a method throwing exception", struct);
// no need to stop
}
String argumentNames = getArgNamesValue(pointcut);
if (argumentNames != null) {
struct.unparsedArgumentNames = argumentNames;
}
// this/target/args binding
final IScope binding;
try {
if (struct.method.isAbstract()) {
binding = null;
} else {
binding = new BindingScope(struct.enclosingType, struct.context, extractBindings(struct));
}
} catch (UnreadableDebugInfoException e) {
return false;
}
UnresolvedType[] argumentTypes = new UnresolvedType[struct.method.getArgumentTypes().length];
for (int i = 0; i < argumentTypes.length; i++) {
argumentTypes[i] = UnresolvedType.forSignature(struct.method.getArgumentTypes()[i].getSignature());
}
Pointcut pc = null;
if (struct.method.isAbstract()) {
if ((pointcutExpr != null && isNullOrEmpty(pointcutExpr.getValue().stringifyValue())) || pointcutExpr == null) {
// abstract pointcut
// leave pc = null
} else {
reportError("Found defined @Pointcut on an abstract method", struct);
return false;// stop
}
} else {
if (pointcutExpr == null || isNullOrEmpty(pointcutExpr.getValue().stringifyValue())) {
// the matches nothing pointcut (125475/125480) - perhaps not as
// cleanly supported as it could be.
} else {
// if (pointcutExpr != null) {
// use a LazyResolvedPointcutDefinition so that the pointcut is
// resolved lazily
// since for it to be resolved, we will need other pointcuts to
// be registered as well
pc = parsePointcut(pointcutExpr.getValue().stringifyValue(), struct, true);
if (pc == null) {
return false;// parse error
}
pc.setLocation(struct.context, -1, -1);// FIXME AVASM !! bMethod
// is null here..
// } else {
// reportError("Found undefined @Pointcut on a non-abstract method",
// struct);
// return false;
// }
}
}
// do not resolve binding now but lazily
struct.ajAttributes.add(new AjAttribute.PointcutDeclarationAttribute(new LazyResolvedPointcutDefinition(
struct.enclosingType, struct.method.getModifiers(), struct.method.getName(), argumentTypes, UnresolvedType
.forSignature(struct.method.getReturnType().getSignature()), pc,// can
// be
// null
// for
// abstract
// pointcut
binding // can be null for abstract pointcut
)));
return true;
}
/**
* Read @DeclareError, @DeclareWarning
*
* @param runtimeAnnotations
* @param struct
* @return true if found
*/
private static boolean handleDeclareErrorOrWarningAnnotation(AsmManager model, RuntimeAnnos runtimeAnnotations,
AjAttributeFieldStruct struct) {
AnnotationGen error = getAnnotation(runtimeAnnotations, AjcMemberMaker.DECLAREERROR_ANNOTATION);
boolean hasError = false;
if (error != null) {
NameValuePair declareError = getAnnotationElement(error, VALUE);
if (declareError != null) {
if (!STRING_DESC.equals(struct.field.getSignature()) || struct.field.getConstantValue() == null) {
reportError("@DeclareError used on a non String constant field", struct);
return false;
}
Pointcut pc = parsePointcut(declareError.getValue().stringifyValue(), struct, false);
if (pc == null) {
hasError = false;// cannot parse pointcut
} else {
DeclareErrorOrWarning deow = new DeclareErrorOrWarning(true, pc, struct.field.getConstantValue().toString());
setDeclareErrorOrWarningLocation(model, deow, struct);
struct.ajAttributes.add(new AjAttribute.DeclareAttribute(deow));
hasError = true;
}
}
}
AnnotationGen warning = getAnnotation(runtimeAnnotations, AjcMemberMaker.DECLAREWARNING_ANNOTATION);
boolean hasWarning = false;
if (warning != null) {
NameValuePair declareWarning = getAnnotationElement(warning, VALUE);
if (declareWarning != null) {
if (!STRING_DESC.equals(struct.field.getSignature()) || struct.field.getConstantValue() == null) {
reportError("@DeclareWarning used on a non String constant field", struct);
return false;
}
Pointcut pc = parsePointcut(declareWarning.getValue().stringifyValue(), struct, false);
if (pc == null) {
hasWarning = false;// cannot parse pointcut
} else {
DeclareErrorOrWarning deow = new DeclareErrorOrWarning(false, pc, struct.field.getConstantValue().toString());
setDeclareErrorOrWarningLocation(model, deow, struct);
struct.ajAttributes.add(new AjAttribute.DeclareAttribute(deow));
return hasWarning = true;
}
}
}
return hasError || hasWarning;
}
/**
* Sets the location for the declare error / warning using the corresponding IProgramElement in the structure model. This will
* only fix bug 120356 if compiled with -emacssym, however, it does mean that the cross references view in AJDT will show the
* correct information.
*
* Other possibilities for fix: 1. using the information in ajcDeclareSoft (if this is set correctly) which will fix the problem
* if compiled with ajc but not if compiled with javac. 2. creating an AjAttribute called FieldDeclarationLineNumberAttribute
* (much like MethodDeclarationLineNumberAttribute) which we can ask for the offset. This will again only fix bug 120356 when
* compiled with ajc.
*
* @param deow
* @param struct
*/
private static void setDeclareErrorOrWarningLocation(AsmManager model, DeclareErrorOrWarning deow, AjAttributeFieldStruct struct) {
IHierarchy top = (model == null ? null : model.getHierarchy());
if (top != null && top.getRoot() != null) {
IProgramElement ipe = top.findElementForLabel(top.getRoot(), IProgramElement.Kind.FIELD, struct.field.getName());
if (ipe != null && ipe.getSourceLocation() != null) {
ISourceLocation sourceLocation = ipe.getSourceLocation();
int start = sourceLocation.getOffset();
int end = start + struct.field.getName().length();
deow.setLocation(struct.context, start, end);
return;
}
}
deow.setLocation(struct.context, -1, -1);
}
/**
* Returns a readable representation of a method. Method.toString() is not suitable.
*
* @param method
* @return a readable representation of a method
*/
private static String methodToString(Method method) {
StringBuffer sb = new StringBuffer();
sb.append(method.getName());
sb.append(method.getSignature());
return sb.toString();
}
/**
* Build the bindings for a given method (pointcut / advice)
*
* @param struct
* @return null if no debug info is available
*/
private static FormalBinding[] extractBindings(AjAttributeMethodStruct struct) throws UnreadableDebugInfoException {
Method method = struct.method;
String[] argumentNames = struct.getArgumentNames();
// assert debug info was here
if (argumentNames.length != method.getArgumentTypes().length) {
reportError(
"Cannot read debug info for @Aspect to handle formal binding in pointcuts (please compile with 'javac -g' or ' bindings = new ArrayList();
for (int i = 0; i < argumentNames.length; i++) {
String argumentName = argumentNames[i];
UnresolvedType argumentType = UnresolvedType.forSignature(method.getArgumentTypes()[i].getSignature());
// do not bind JoinPoint / StaticJoinPoint /
// EnclosingStaticJoinPoint
// TODO solve me : this means that the JP/SJP/ESJP cannot appear as
// binding
// f.e. when applying advice on advice etc
if ((AjcMemberMaker.TYPEX_JOINPOINT.equals(argumentType)
|| AjcMemberMaker.TYPEX_PROCEEDINGJOINPOINT.equals(argumentType)
|| AjcMemberMaker.TYPEX_STATICJOINPOINT.equals(argumentType)
|| AjcMemberMaker.TYPEX_ENCLOSINGSTATICJOINPOINT.equals(argumentType) || AjcMemberMaker.AROUND_CLOSURE_TYPE
.equals(argumentType))) {
// continue;// skip
bindings.add(new FormalBinding.ImplicitFormalBinding(argumentType, argumentName, i));
} else {
bindings.add(new FormalBinding(argumentType, argumentName, i));
}
}
return bindings.toArray(new FormalBinding[] {});
}
// FIXME alex deal with exclude index
private static FormalBinding[] extractBindings(AjAttributeMethodStruct struct, String excludeFormal)
throws UnreadableDebugInfoException {
FormalBinding[] bindings = extractBindings(struct);
// int excludeIndex = -1;
for (int i = 0; i < bindings.length; i++) {
FormalBinding binding = bindings[i];
if (binding.getName().equals(excludeFormal)) {
// excludeIndex = i;
bindings[i] = new FormalBinding.ImplicitFormalBinding(binding.getType(), binding.getName(), binding.getIndex());
break;
}
}
return bindings;
//
// if (excludeIndex >= 0) {
// FormalBinding[] bindingsFiltered = new
// FormalBinding[bindings.length-1];
// int k = 0;
// for (int i = 0; i < bindings.length; i++) {
// if (i == excludeIndex) {
// ;
// } else {
// bindingsFiltered[k] = new FormalBinding(bindings[i].getType(),
// bindings[i].getName(), k);
// k++;
// }
// }
// return bindingsFiltered;
// } else {
// return bindings;
// }
}
/**
* Compute the flag for the xxxJoinPoint extra argument
*
* @param method
* @return extra arg flag
*/
private static int extractExtraArgument(Method method) {
Type[] methodArgs = method.getArgumentTypes();
String[] sigs = new String[methodArgs.length];
for (int i = 0; i < methodArgs.length; i++) {
sigs[i] = methodArgs[i].getSignature();
}
return extractExtraArgument(sigs);
}
/**
* Compute the flag for the xxxJoinPoint extra argument
*
* @param argumentSignatures
* @return extra arg flag
*/
public static int extractExtraArgument(String[] argumentSignatures) {
int extraArgument = 0;
for (int i = 0; i < argumentSignatures.length; i++) {
if (AjcMemberMaker.TYPEX_JOINPOINT.getSignature().equals(argumentSignatures[i])) {
extraArgument |= Advice.ThisJoinPoint;
} else if (AjcMemberMaker.TYPEX_PROCEEDINGJOINPOINT.getSignature().equals(argumentSignatures[i])) {
extraArgument |= Advice.ThisJoinPoint;
} else if (AjcMemberMaker.TYPEX_STATICJOINPOINT.getSignature().equals(argumentSignatures[i])) {
extraArgument |= Advice.ThisJoinPointStaticPart;
} else if (AjcMemberMaker.TYPEX_ENCLOSINGSTATICJOINPOINT.getSignature().equals(argumentSignatures[i])) {
extraArgument |= Advice.ThisEnclosingJoinPointStaticPart;
}
}
return extraArgument;
}
/**
* Returns the runtime (RV/RIV) annotation of type annotationType or null if no such annotation
*
* @param rvs
* @param annotationType
* @return annotation
*/
private static AnnotationGen getAnnotation(RuntimeAnnos rvs, UnresolvedType annotationType) {
final String annotationTypeName = annotationType.getName();
for (AnnotationGen rv : rvs.getAnnotations()) {
if (annotationTypeName.equals(rv.getTypeName())) {
return rv;
}
}
return null;
}
/**
* Returns the value of a given element of an annotation or null if not found Caution: Does not handles default value.
*
* @param annotation
* @param elementName
* @return annotation NVP
*/
private static NameValuePair getAnnotationElement(AnnotationGen annotation, String elementName) {
for (NameValuePair element : annotation.getValues()) {
if (elementName.equals(element.getNameString())) {
return element;
}
}
return null;
}
/**
* Return the argNames set for an annotation or null if it is not specified.
*/
private static String getArgNamesValue(AnnotationGen anno) {
List elements = anno.getValues();
for (NameValuePair element : elements) {
if (ARGNAMES.equals(element.getNameString())) {
return element.getValue().stringifyValue();
}
}
return null;
}
private static String lastbit(String fqname) {
int i = fqname.lastIndexOf(".");
if (i == -1) {
return fqname;
} else {
return fqname.substring(i + 1);
}
}
/**
* Extract the method argument names. First we try the debug info attached to the method (the LocalVariableTable) - if we cannot
* find that we look to use the argNames value that may have been supplied on the associated annotation. If that fails we just
* don't know and return an empty string.
*
* @param method
* @param argNamesFromAnnotation
* @param methodStruct
* @return method argument names
*/
private static String[] getMethodArgumentNames(Method method, String argNamesFromAnnotation,
AjAttributeMethodStruct methodStruct) {
if (method.getArgumentTypes().length == 0) {
return EMPTY_STRINGS;
}
final int startAtStackIndex = method.isStatic() ? 0 : 1;
final List arguments = new ArrayList();
LocalVariableTable lt = method.getLocalVariableTable();
if (lt != null) {
LocalVariable[] lvt = lt.getLocalVariableTable();
for (int j = 0; j < lvt.length; j++) {
LocalVariable localVariable = lvt[j];
if (localVariable != null) { // pr348488
if (localVariable.getStartPC() == 0) {
if (localVariable.getIndex() >= startAtStackIndex) {
arguments.add(new MethodArgument(localVariable.getName(), localVariable.getIndex()));
}
}
} else {
String typename = (methodStruct.enclosingType != null ? methodStruct.enclosingType.getName() : "");
System.err.println("AspectJ: 348488 debug: unusual local variable table for method " + typename + "."
+ method.getName());
}
}
if (arguments.size() == 0) {
// could be cobertura code where some extra bytecode has been stuffed in at the start of the method
// but the local variable table hasn't been repaired - for example:
// LocalVariable(start_pc = 6, length = 40, index = 0:com.example.ExampleAspect this)
// LocalVariable(start_pc = 6, length = 40, index = 1:org.aspectj.lang.ProceedingJoinPoint pjp)
// LocalVariable(start_pc = 6, length = 40, index = 2:int __cobertura__line__number__)
// LocalVariable(start_pc = 6, length = 40, index = 3:int __cobertura__branch__number__)
LocalVariable localVariable = lvt[0];
if (localVariable != null) { // pr348488
if (localVariable.getStartPC() != 0) {
// looks suspicious so let's use this information
for (int j = 0; j < lvt.length && arguments.size() < method.getArgumentTypes().length; j++) {
localVariable = lvt[j];
if (localVariable.getIndex() >= startAtStackIndex) {
arguments.add(new MethodArgument(localVariable.getName(), localVariable.getIndex()));
}
}
}
}
}
} else {
// No debug info, do we have an annotation value we can rely on?
if (argNamesFromAnnotation != null) {
StringTokenizer st = new StringTokenizer(argNamesFromAnnotation, " ,");
List args = new ArrayList();
while (st.hasMoreTokens()) {
args.add(st.nextToken());
}
if (args.size() != method.getArgumentTypes().length) {
StringBuffer shortString = new StringBuffer().append(lastbit(method.getReturnType().toString())).append(" ")
.append(method.getName());
if (method.getArgumentTypes().length > 0) {
shortString.append("(");
for (int i = 0; i < method.getArgumentTypes().length; i++) {
shortString.append(lastbit(method.getArgumentTypes()[i].toString()));
if ((i + 1) < method.getArgumentTypes().length) {
shortString.append(",");
}
}
shortString.append(")");
}
reportError("argNames annotation value does not specify the right number of argument names for the method '"
+ shortString.toString() + "'", methodStruct);
return EMPTY_STRINGS;
}
return args.toArray(new String[] {});
}
}
if (arguments.size() != method.getArgumentTypes().length) {
return EMPTY_STRINGS;
}
// sort by index
Collections.sort(arguments, new Comparator() {
public int compare(MethodArgument mo, MethodArgument mo1) {
if (mo.indexOnStack == mo1.indexOnStack) {
return 0;
} else if (mo.indexOnStack > mo1.indexOnStack) {
return 1;
} else {
return -1;
}
}
});
String[] argumentNames = new String[arguments.size()];
int i = 0;
for (MethodArgument methodArgument : arguments) {
argumentNames[i++] = methodArgument.name;
}
return argumentNames;
}
/**
* A method argument, used for sorting by indexOnStack (ie order in signature)
*
* @author Alexandre Vasseur
*/
private static class MethodArgument {
String name;
int indexOnStack;
public MethodArgument(String name, int indexOnStack) {
this.name = name;
this.indexOnStack = indexOnStack;
}
}
/**
* LazyResolvedPointcutDefinition lazyly resolve the pointcut so that we have time to register all pointcut referenced before
* pointcut resolution happens
*
* @author Alexandre Vasseur
*/
public static class LazyResolvedPointcutDefinition extends ResolvedPointcutDefinition {
private final Pointcut m_pointcutUnresolved; // null for abstract
// pointcut
private final IScope m_binding;
private Pointcut m_lazyPointcut = null;
public LazyResolvedPointcutDefinition(UnresolvedType declaringType, int modifiers, String name,
UnresolvedType[] parameterTypes, UnresolvedType returnType, Pointcut pointcut, IScope binding) {
super(declaringType, modifiers, name, parameterTypes, returnType, Pointcut.makeMatchesNothing(Pointcut.RESOLVED));
m_pointcutUnresolved = pointcut;
m_binding = binding;
}
@Override
public Pointcut getPointcut() {
if (m_lazyPointcut == null && m_pointcutUnresolved == null) {
m_lazyPointcut = Pointcut.makeMatchesNothing(Pointcut.CONCRETE);
}
if (m_lazyPointcut == null && m_pointcutUnresolved != null) {
m_lazyPointcut = m_pointcutUnresolved.resolve(m_binding);
m_lazyPointcut.copyLocationFrom(m_pointcutUnresolved);
}
return m_lazyPointcut;
}
}
/**
* Helper to test empty strings
*
* @param s
* @return true if empty or null
*/
private static boolean isNullOrEmpty(String s) {
return (s == null || s.length() <= 0);
}
/**
* Set the pointcut bindings for which to ignore unbound issues, so that we can implicitly bind xxxJoinPoint for @AJ advices
*
* @param pointcut
* @param bindings
*/
private static void setIgnoreUnboundBindingNames(Pointcut pointcut, FormalBinding[] bindings) {
// register ImplicitBindings as to be ignored since unbound
// TODO is it likely to fail in a bad way if f.e. this(jp) etc ?
List ignores = new ArrayList();
for (int i = 0; i < bindings.length; i++) {
FormalBinding formalBinding = bindings[i];
if (formalBinding instanceof FormalBinding.ImplicitFormalBinding) {
ignores.add(formalBinding.getName());
}
}
pointcut.m_ignoreUnboundBindingForNames = ignores.toArray(new String[ignores.size()]);
}
/**
* A check exception when we cannot read debug info (needed for formal binding)
*/
private static class UnreadableDebugInfoException extends Exception {
}
/**
* Report an error
*
* @param message
* @param location
*/
private static void reportError(String message, AjAttributeStruct location) {
if (!location.handler.isIgnoring(IMessage.ERROR)) {
location.handler.handleMessage(new Message(message, location.enclosingType.getSourceLocation(), true));
}
}
// private static void reportError(String message, IMessageHandler handler, ISourceLocation sourceLocation) {
// if (!handler.isIgnoring(IMessage.ERROR)) {
// handler.handleMessage(new Message(message, sourceLocation, true));
// }
// }
/**
* Report a warning
*
* @param message
* @param location
*/
private static void reportWarning(String message, AjAttributeStruct location) {
if (!location.handler.isIgnoring(IMessage.WARNING)) {
location.handler.handleMessage(new Message(message, location.enclosingType.getSourceLocation(), false));
}
}
/**
* Parse the given pointcut, return null on failure and issue an error
*
* @param pointcutString
* @param struct
* @param allowIf
* @return pointcut, unresolved
*/
private static Pointcut parsePointcut(String pointcutString, AjAttributeStruct struct, boolean allowIf) {
try {
PatternParser parser = new PatternParser(pointcutString, struct.context);
Pointcut pointcut = parser.parsePointcut();
parser.checkEof();
pointcut.check(null, struct.enclosingType.getWorld());
if (!allowIf && pointcutString.indexOf("if()") >= 0 && hasIf(pointcut)) {
reportError("if() pointcut is not allowed at this pointcut location '" + pointcutString + "'", struct);
return null;
}
pointcut.setLocation(struct.context, -1, -1);// FIXME -1,-1 is not
// good enough
return pointcut;
} catch (ParserException e) {
reportError("Invalid pointcut '" + pointcutString + "': " + e.toString()
+ (e.getLocation() == null ? "" : " at position " + e.getLocation().getStart()), struct);
return null;
}
}
private static boolean hasIf(Pointcut pointcut) {
IfFinder visitor = new IfFinder();
pointcut.accept(visitor, null);
return visitor.hasIf;
}
/**
* Parse the given type pattern, return null on failure and issue an error
*
* @param patternString
* @param location
* @return type pattern
*/
private static TypePattern parseTypePattern(String patternString, AjAttributeStruct location) {
try {
TypePattern typePattern = new PatternParser(patternString).parseTypePattern();
typePattern.setLocation(location.context, -1, -1);// FIXME -1,-1 is
// not good
// enough
return typePattern;
} catch (ParserException e) {
reportError("Invalid type pattern'" + patternString + "' : " + e.getLocation(), location);
return null;
}
}
static class ThrownFormalNotDeclaredInAdviceSignatureException extends Exception {
private final String formalName;
public ThrownFormalNotDeclaredInAdviceSignatureException(String formalName) {
this.formalName = formalName;
}
public String getFormalName() {
return formalName;
}
}
static class ReturningFormalNotDeclaredInAdviceSignatureException extends Exception {
private final String formalName;
public ReturningFormalNotDeclaredInAdviceSignatureException(String formalName) {
this.formalName = formalName;
}
public String getFormalName() {
return formalName;
}
}
}