search/org/eclipse/jdt/internal/core/search/matching/MethodLocator.java - gerrit/e4/org.eclipse.jdt.core - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2004 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.internal.core.search.matching;

 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.*;
 import org.eclipse.jdt.core.*;
 import org.eclipse.jdt.core.compiler.CharOperation;
 import org.eclipse.jdt.core.search.*;
 import org.eclipse.jdt.core.search.SearchMatch;
 import org.eclipse.jdt.internal.compiler.ast.*;
 import org.eclipse.jdt.internal.compiler.env.IBinaryType;
 import org.eclipse.jdt.internal.compiler.lookup.*;
 import org.eclipse.jdt.internal.core.util.SimpleSet;

 public class MethodLocator extends PatternLocator {

 protected MethodPattern pattern;
 protected boolean isDeclarationOfReferencedMethodsPattern;

 //extra reference info
 public char[][][] allSuperDeclaringTypeNames;

 public MethodLocator(MethodPattern pattern) {
 	super(pattern);

 	this.pattern = pattern;
 	this.isDeclarationOfReferencedMethodsPattern = this.pattern instanceof DeclarationOfReferencedMethodsPattern;
 }
 public void initializePolymorphicSearch(MatchLocator locator) {
 	try {
 		this.allSuperDeclaringTypeNames =
 			new SuperTypeNamesCollector(
 				this.pattern,
 				this.pattern.declaringSimpleName,
 				this.pattern.declaringQualification,
 				locator,
 				this.pattern.declaringType,
 				locator.progressMonitor).collect();
 	} catch (JavaModelException e) {
 		// inaccurate matches will be found
 	}
 }
 /**
  * Returns whether the code gen will use an invoke virtual for
  * this message send or not.
  */
 protected boolean isVirtualInvoke(MethodBinding method, MessageSend messageSend) {
 	return !method.isStatic() && !method.isPrivate() && !messageSend.isSuperAccess();
 }
 //public int match(ASTNode node, MatchingNodeSet nodeSet) - SKIP IT
 //public int match(ConstructorDeclaration node, MatchingNodeSet nodeSet) - SKIP IT
 //public int match(Expression node, MatchingNodeSet nodeSet) - SKIP IT
 //public int match(FieldDeclaration node, MatchingNodeSet nodeSet) - SKIP IT
 public int match(MethodDeclaration node, MatchingNodeSet nodeSet) {
 	if (!this.pattern.findDeclarations) return IMPOSSIBLE_MATCH;

 	if (!matchesName(this.pattern.selector, node.selector)) return IMPOSSIBLE_MATCH;
 	if (this.pattern.parameterSimpleNames != null) {
 		int length = this.pattern.parameterSimpleNames.length;
 		ASTNode[] args = node.arguments;
 		int argsLength = args == null ? 0 : args.length;
 		if (length != argsLength) return IMPOSSIBLE_MATCH;

 		for (int i = 0; i < argsLength; i++)
 			if (!matchesTypeReference(this.pattern.parameterSimpleNames[i], ((Argument) args[i]).type)) return IMPOSSIBLE_MATCH;
 	}
 	if (!matchesTypeReference(this.pattern.returnSimpleName, node.returnType)) return IMPOSSIBLE_MATCH;

 	return nodeSet.addMatch(node, ((InternalSearchPattern)this.pattern).mustResolve ? POSSIBLE_MATCH : ACCURATE_MATCH);
 }
 public int match(MessageSend node, MatchingNodeSet nodeSet) {
 	if (!this.pattern.findReferences) return IMPOSSIBLE_MATCH;

 	if (!matchesName(this.pattern.selector, node.selector)) return IMPOSSIBLE_MATCH;
 	if (this.pattern.parameterSimpleNames != null) {
 		int length = this.pattern.parameterSimpleNames.length;
 		ASTNode[] args = node.arguments;
 		int argsLength = args == null ? 0 : args.length;
 		if (length != argsLength) return IMPOSSIBLE_MATCH;
 	}

 	return nodeSet.addMatch(node, ((InternalSearchPattern)this.pattern).mustResolve ? POSSIBLE_MATCH : ACCURATE_MATCH);
 }
 //public int match(Reference node, MatchingNodeSet nodeSet) - SKIP IT
 //public int match(TypeDeclaration node, MatchingNodeSet nodeSet) - SKIP IT
 //public int match(TypeReference node, MatchingNodeSet nodeSet) - SKIP IT

 protected int matchContainer() {
 	if (this.pattern.findReferences) {
 		// need to look almost everywhere to find in javadocs
 		return CLASS_CONTAINER | METHOD_CONTAINER | FIELD_CONTAINER;
 	}
 	return CLASS_CONTAINER;
 }
 protected int matchMethod(MethodBinding method) {
 	if (!matchesName(this.pattern.selector, method.selector)) return IMPOSSIBLE_MATCH;

 	int level = ACCURATE_MATCH;
 	// look at return type only if declaring type is not specified
 	if (this.pattern.declaringSimpleName == null) {
 		int newLevel = resolveLevelForType(this.pattern.returnSimpleName, this.pattern.returnQualification, method.returnType);
 		if (level > newLevel) {
 			if (newLevel == IMPOSSIBLE_MATCH) return IMPOSSIBLE_MATCH;
 			level = newLevel; // can only be downgraded
 		}
 	}

 	// parameter types
 	int parameterCount = this.pattern.parameterSimpleNames == null ? -1 : this.pattern.parameterSimpleNames.length;
 	if (parameterCount > -1) {
 		if (method.parameters == null) return INACCURATE_MATCH;
 		if (parameterCount != method.parameters.length) return IMPOSSIBLE_MATCH;
 		for (int i = 0; i < parameterCount; i++) {
 			int newLevel = resolveLevelForType(this.pattern.parameterSimpleNames[i], this.pattern.parameterQualifications[i], method.parameters[i]);
 			if (level > newLevel) {
 				if (newLevel == IMPOSSIBLE_MATCH) return IMPOSSIBLE_MATCH;
 				level = newLevel; // can only be downgraded
 			}
 		}
 	}
 	return level;
 }
 /**
  * @see SearchPattern#matchReportReference
  */
 protected void matchReportReference(ASTNode reference, IJavaElement element, int accuracy, MatchLocator locator) throws CoreException {
 	if (this.isDeclarationOfReferencedMethodsPattern) {
 		// need exact match to be able to open on type ref
 		if (accuracy != SearchMatch.A_ACCURATE) return;

 		// element that references the method must be included in the enclosing element
 		DeclarationOfReferencedMethodsPattern declPattern = (DeclarationOfReferencedMethodsPattern) this.pattern;
 		while (element != null && !declPattern.enclosingElement.equals(element))
 			element = element.getParent();
 		if (element != null)
 			reportDeclaration(((MessageSend) reference).binding, locator, declPattern.knownMethods);
 	} else if (this.pattern.findReferences && reference instanceof MessageSend) {
 		int offset = (int) (((MessageSend) reference).nameSourcePosition >>> 32);
 		SearchMatch match = locator.newMethodReferenceMatch(element, accuracy, offset, reference.sourceEnd-offset+1, reference);
 		locator.report(match);
 	} else {
 		int offset = reference.sourceStart;
 		SearchMatch match = locator.newMethodReferenceMatch(element, accuracy, offset, reference.sourceEnd-offset+1, reference);
 		locator.report(match);
 	}
 }
 protected int referenceType() {
 	return IJavaElement.METHOD;
 }
 protected void reportDeclaration(MethodBinding methodBinding, MatchLocator locator, SimpleSet knownMethods) throws CoreException {
 	ReferenceBinding declaringClass = methodBinding.declaringClass;
 	IType type = locator.lookupType(declaringClass);
 	if (type == null) return; // case of a secondary type

 	char[] bindingSelector = methodBinding.selector;
 	TypeBinding[] parameters = methodBinding.parameters;
 	int parameterLength = parameters.length;
 	String[] parameterTypes = new String[parameterLength];
 	for (int i = 0; i  < parameterLength; i++)
 		parameterTypes[i] = Signature.createTypeSignature(parameters[i].sourceName(), false);
 	IMethod method = type.getMethod(new String(bindingSelector), parameterTypes);
 	if (knownMethods.includes(method)) return;

 	knownMethods.add(method);
 	IResource resource = type.getResource();
 	boolean isBinary = type.isBinary();
 	IBinaryType info = null;
 	if (isBinary) {
 		if (resource == null)
 			resource = type.getJavaProject().getProject();
 		info = locator.getBinaryInfo((org.eclipse.jdt.internal.core.ClassFile)type.getClassFile(), resource);
 		locator.reportBinaryMemberDeclaration(resource, method, info, SearchMatch.A_ACCURATE);
 	} else {
 		ClassScope scope = ((SourceTypeBinding) declaringClass).scope;
 		if (scope != null) {
 			TypeDeclaration typeDecl = scope.referenceContext;
 			AbstractMethodDeclaration methodDecl = null;
 			AbstractMethodDeclaration[] methodDecls = typeDecl.methods;
 			for (int i = 0, length = methodDecls.length; i < length; i++) {
 				if (CharOperation.equals(bindingSelector, methodDecls[i].selector)) {
 					methodDecl = methodDecls[i];
 					break;
 				}
 			}
 			if (methodDecl != null) {
 				int offset = methodDecl.sourceStart;
 				SearchMatch match = new MethodDeclarationMatch(method, SearchMatch.A_ACCURATE, offset, methodDecl.sourceEnd-offset+1, locator.getParticipant(), resource);
 				locator.report(match);
 			}
 		}
 	}
 }
 public int resolveLevel(ASTNode possibleMatchingNode) {
 	if (this.pattern.findReferences && possibleMatchingNode instanceof MessageSend)
 		return resolveLevel((MessageSend) possibleMatchingNode);
 	if (this.pattern.findDeclarations && possibleMatchingNode instanceof MethodDeclaration)
 		return resolveLevel(((MethodDeclaration) possibleMatchingNode).binding);
 	return IMPOSSIBLE_MATCH;
 }
 public int resolveLevel(Binding binding) {
 	if (binding == null) return INACCURATE_MATCH;
 	if (!(binding instanceof MethodBinding)) return IMPOSSIBLE_MATCH;

 	MethodBinding method = (MethodBinding) binding;
 	int methodLevel = matchMethod(method);
 	if (methodLevel == IMPOSSIBLE_MATCH) return IMPOSSIBLE_MATCH;

 	// declaring type
 	char[] qualifiedPattern = qualifiedPattern(this.pattern.declaringSimpleName, this.pattern.declaringQualification);
 	if (qualifiedPattern == null) return methodLevel; // since any declaring class will do

 	int declaringLevel = !method.isStatic() && !method.isPrivate()
 		? resolveLevelAsSubtype(qualifiedPattern, method.declaringClass)
 		: resolveLevelForType(qualifiedPattern, method.declaringClass);
 	return methodLevel > declaringLevel ? declaringLevel : methodLevel; // return the weaker match
 }
 protected int resolveLevel(MessageSend messageSend) {
 	MethodBinding method = messageSend.binding;
 	if (method == null) return INACCURATE_MATCH;

 	int methodLevel = matchMethod(method);
 	if (methodLevel == IMPOSSIBLE_MATCH) return IMPOSSIBLE_MATCH;

 	// receiver type
 	char[] qualifiedPattern = qualifiedPattern(this.pattern.declaringSimpleName, this.pattern.declaringQualification);
 	if (qualifiedPattern == null) return methodLevel; // since any declaring class will do

 	int declaringLevel;
 	if (isVirtualInvoke(method, messageSend) && !(messageSend.receiverType instanceof ArrayBinding)) {
 		declaringLevel = resolveLevelAsSubtype(qualifiedPattern, method.declaringClass);
 		if (declaringLevel == IMPOSSIBLE_MATCH) {
 			if (method.declaringClass == null || this.allSuperDeclaringTypeNames == null) {
 				declaringLevel = INACCURATE_MATCH;
 			} else {
 				char[][] compoundName = method.declaringClass.compoundName;
 				for (int i = 0, max = this.allSuperDeclaringTypeNames.length; i < max; i++)
 					if (CharOperation.equals(this.allSuperDeclaringTypeNames[i], compoundName))
 						return methodLevel; // since this is an ACCURATE_MATCH so return the possibly weaker match
 			}
 		}
 	} else {
 		declaringLevel = resolveLevelForType(qualifiedPattern, method.declaringClass);
 	}
 	return methodLevel > declaringLevel ? declaringLevel : methodLevel; // return the weaker match
 }
 /**
  * Returns whether the given reference type binding matches or is a subtype of a type
  * that matches the given qualified pattern.
  * Returns ACCURATE_MATCH if it does.
  * Returns INACCURATE_MATCH if resolve fails
  * Returns IMPOSSIBLE_MATCH if it doesn't.
  */
 protected int resolveLevelAsSubtype(char[] qualifiedPattern, ReferenceBinding type) {
 	if (type == null) return INACCURATE_MATCH;

 	int level = resolveLevelForType(qualifiedPattern, type);
 	if (level != IMPOSSIBLE_MATCH) return level;

 	// matches superclass
 	if (!type.isInterface() && !CharOperation.equals(type.compoundName, TypeConstants.JAVA_LANG_OBJECT)) {
 		level = resolveLevelAsSubtype(qualifiedPattern, type.superclass());
 		if (level != IMPOSSIBLE_MATCH) return level;
 	}

 	// matches interfaces
 	ReferenceBinding[] interfaces = type.superInterfaces();
 	if (interfaces == null) return INACCURATE_MATCH;
 	for (int i = 0; i < interfaces.length; i++) {
 		level = resolveLevelAsSubtype(qualifiedPattern, interfaces[i]);
 		if (level != IMPOSSIBLE_MATCH) return level;
 	}
 	return IMPOSSIBLE_MATCH;
 }
 public String toString() {
 	return "Locator for " + this.pattern.toString(); //$NON-NLS-1$
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2004 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.internal.core.search.matching;

	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.runtime.*;
	import org.eclipse.jdt.core.*;
	import org.eclipse.jdt.core.compiler.CharOperation;
	import org.eclipse.jdt.core.search.*;
	import org.eclipse.jdt.core.search.SearchMatch;
	import org.eclipse.jdt.internal.compiler.ast.*;
	import org.eclipse.jdt.internal.compiler.env.IBinaryType;
	import org.eclipse.jdt.internal.compiler.lookup.*;
	import org.eclipse.jdt.internal.core.util.SimpleSet;

	public class MethodLocator extends PatternLocator {

	protected MethodPattern pattern;
	protected boolean isDeclarationOfReferencedMethodsPattern;

	//extra reference info
	public char[][][] allSuperDeclaringTypeNames;

	public MethodLocator(MethodPattern pattern) {
	super(pattern);

	this.pattern = pattern;
	this.isDeclarationOfReferencedMethodsPattern = this.pattern instanceof DeclarationOfReferencedMethodsPattern;
	}
	public void initializePolymorphicSearch(MatchLocator locator) {
	try {
	this.allSuperDeclaringTypeNames =
	new SuperTypeNamesCollector(
	this.pattern,
	this.pattern.declaringSimpleName,
	this.pattern.declaringQualification,
	locator,
	this.pattern.declaringType,
	locator.progressMonitor).collect();
	} catch (JavaModelException e) {
	// inaccurate matches will be found
	}
	}
	/**
	* Returns whether the code gen will use an invoke virtual for
	* this message send or not.
	*/
	protected boolean isVirtualInvoke(MethodBinding method, MessageSend messageSend) {
	return !method.isStatic() && !method.isPrivate() && !messageSend.isSuperAccess();
	}
	//public int match(ASTNode node, MatchingNodeSet nodeSet) - SKIP IT
	//public int match(ConstructorDeclaration node, MatchingNodeSet nodeSet) - SKIP IT
	//public int match(Expression node, MatchingNodeSet nodeSet) - SKIP IT
	//public int match(FieldDeclaration node, MatchingNodeSet nodeSet) - SKIP IT
	public int match(MethodDeclaration node, MatchingNodeSet nodeSet) {
	if (!this.pattern.findDeclarations) return IMPOSSIBLE_MATCH;

	if (!matchesName(this.pattern.selector, node.selector)) return IMPOSSIBLE_MATCH;
	if (this.pattern.parameterSimpleNames != null) {
	int length = this.pattern.parameterSimpleNames.length;
	ASTNode[] args = node.arguments;
	int argsLength = args == null ? 0 : args.length;
	if (length != argsLength) return IMPOSSIBLE_MATCH;

	for (int i = 0; i < argsLength; i++)
	if (!matchesTypeReference(this.pattern.parameterSimpleNames[i], ((Argument) args[i]).type)) return IMPOSSIBLE_MATCH;
	}
	if (!matchesTypeReference(this.pattern.returnSimpleName, node.returnType)) return IMPOSSIBLE_MATCH;

	return nodeSet.addMatch(node, ((InternalSearchPattern)this.pattern).mustResolve ? POSSIBLE_MATCH : ACCURATE_MATCH);
	}
	public int match(MessageSend node, MatchingNodeSet nodeSet) {
	if (!this.pattern.findReferences) return IMPOSSIBLE_MATCH;

	if (!matchesName(this.pattern.selector, node.selector)) return IMPOSSIBLE_MATCH;
	if (this.pattern.parameterSimpleNames != null) {
	int length = this.pattern.parameterSimpleNames.length;
	ASTNode[] args = node.arguments;
	int argsLength = args == null ? 0 : args.length;
	if (length != argsLength) return IMPOSSIBLE_MATCH;
	}

	return nodeSet.addMatch(node, ((InternalSearchPattern)this.pattern).mustResolve ? POSSIBLE_MATCH : ACCURATE_MATCH);
	}
	//public int match(Reference node, MatchingNodeSet nodeSet) - SKIP IT
	//public int match(TypeDeclaration node, MatchingNodeSet nodeSet) - SKIP IT
	//public int match(TypeReference node, MatchingNodeSet nodeSet) - SKIP IT

	protected int matchContainer() {
	if (this.pattern.findReferences) {
	// need to look almost everywhere to find in javadocs
	return CLASS_CONTAINER \| METHOD_CONTAINER \| FIELD_CONTAINER;
	}
	return CLASS_CONTAINER;
	}
	protected int matchMethod(MethodBinding method) {
	if (!matchesName(this.pattern.selector, method.selector)) return IMPOSSIBLE_MATCH;

	int level = ACCURATE_MATCH;
	// look at return type only if declaring type is not specified
	if (this.pattern.declaringSimpleName == null) {
	int newLevel = resolveLevelForType(this.pattern.returnSimpleName, this.pattern.returnQualification, method.returnType);
	if (level > newLevel) {
	if (newLevel == IMPOSSIBLE_MATCH) return IMPOSSIBLE_MATCH;
	level = newLevel; // can only be downgraded
	}
	}

	// parameter types
	int parameterCount = this.pattern.parameterSimpleNames == null ? -1 : this.pattern.parameterSimpleNames.length;
	if (parameterCount > -1) {
	if (method.parameters == null) return INACCURATE_MATCH;
	if (parameterCount != method.parameters.length) return IMPOSSIBLE_MATCH;
	for (int i = 0; i < parameterCount; i++) {
	int newLevel = resolveLevelForType(this.pattern.parameterSimpleNames[i], this.pattern.parameterQualifications[i], method.parameters[i]);
	if (level > newLevel) {
	if (newLevel == IMPOSSIBLE_MATCH) return IMPOSSIBLE_MATCH;
	level = newLevel; // can only be downgraded
	}
	}
	}
	return level;
	}
	/**
	* @see SearchPattern#matchReportReference
	*/
	protected void matchReportReference(ASTNode reference, IJavaElement element, int accuracy, MatchLocator locator) throws CoreException {
	if (this.isDeclarationOfReferencedMethodsPattern) {
	// need exact match to be able to open on type ref
	if (accuracy != SearchMatch.A_ACCURATE) return;

	// element that references the method must be included in the enclosing element
	DeclarationOfReferencedMethodsPattern declPattern = (DeclarationOfReferencedMethodsPattern) this.pattern;
	while (element != null && !declPattern.enclosingElement.equals(element))
	element = element.getParent();
	if (element != null)
	reportDeclaration(((MessageSend) reference).binding, locator, declPattern.knownMethods);
	} else if (this.pattern.findReferences && reference instanceof MessageSend) {
	int offset = (int) (((MessageSend) reference).nameSourcePosition >>> 32);
	SearchMatch match = locator.newMethodReferenceMatch(element, accuracy, offset, reference.sourceEnd-offset+1, reference);
	locator.report(match);
	} else {
	int offset = reference.sourceStart;
	SearchMatch match = locator.newMethodReferenceMatch(element, accuracy, offset, reference.sourceEnd-offset+1, reference);
	locator.report(match);
	}
	}
	protected int referenceType() {
	return IJavaElement.METHOD;
	}
	protected void reportDeclaration(MethodBinding methodBinding, MatchLocator locator, SimpleSet knownMethods) throws CoreException {
	ReferenceBinding declaringClass = methodBinding.declaringClass;
	IType type = locator.lookupType(declaringClass);
	if (type == null) return; // case of a secondary type

	char[] bindingSelector = methodBinding.selector;
	TypeBinding[] parameters = methodBinding.parameters;
	int parameterLength = parameters.length;
	String[] parameterTypes = new String[parameterLength];
	for (int i = 0; i < parameterLength; i++)
	parameterTypes[i] = Signature.createTypeSignature(parameters[i].sourceName(), false);
	IMethod method = type.getMethod(new String(bindingSelector), parameterTypes);
	if (knownMethods.includes(method)) return;

	knownMethods.add(method);
	IResource resource = type.getResource();
	boolean isBinary = type.isBinary();
	IBinaryType info = null;
	if (isBinary) {
	if (resource == null)
	resource = type.getJavaProject().getProject();
	info = locator.getBinaryInfo((org.eclipse.jdt.internal.core.ClassFile)type.getClassFile(), resource);
	locator.reportBinaryMemberDeclaration(resource, method, info, SearchMatch.A_ACCURATE);
	} else {
	ClassScope scope = ((SourceTypeBinding) declaringClass).scope;
	if (scope != null) {
	TypeDeclaration typeDecl = scope.referenceContext;
	AbstractMethodDeclaration methodDecl = null;
	AbstractMethodDeclaration[] methodDecls = typeDecl.methods;
	for (int i = 0, length = methodDecls.length; i < length; i++) {
	if (CharOperation.equals(bindingSelector, methodDecls[i].selector)) {
	methodDecl = methodDecls[i];
	break;
	}
	}
	if (methodDecl != null) {
	int offset = methodDecl.sourceStart;
	SearchMatch match = new MethodDeclarationMatch(method, SearchMatch.A_ACCURATE, offset, methodDecl.sourceEnd-offset+1, locator.getParticipant(), resource);
	locator.report(match);
	}
	}
	}
	}
	public int resolveLevel(ASTNode possibleMatchingNode) {
	if (this.pattern.findReferences && possibleMatchingNode instanceof MessageSend)
	return resolveLevel((MessageSend) possibleMatchingNode);
	if (this.pattern.findDeclarations && possibleMatchingNode instanceof MethodDeclaration)
	return resolveLevel(((MethodDeclaration) possibleMatchingNode).binding);
	return IMPOSSIBLE_MATCH;
	}
	public int resolveLevel(Binding binding) {
	if (binding == null) return INACCURATE_MATCH;
	if (!(binding instanceof MethodBinding)) return IMPOSSIBLE_MATCH;

	MethodBinding method = (MethodBinding) binding;
	int methodLevel = matchMethod(method);
	if (methodLevel == IMPOSSIBLE_MATCH) return IMPOSSIBLE_MATCH;

	// declaring type
	char[] qualifiedPattern = qualifiedPattern(this.pattern.declaringSimpleName, this.pattern.declaringQualification);
	if (qualifiedPattern == null) return methodLevel; // since any declaring class will do

	int declaringLevel = !method.isStatic() && !method.isPrivate()
	? resolveLevelAsSubtype(qualifiedPattern, method.declaringClass)
	: resolveLevelForType(qualifiedPattern, method.declaringClass);
	return methodLevel > declaringLevel ? declaringLevel : methodLevel; // return the weaker match
	}
	protected int resolveLevel(MessageSend messageSend) {
	MethodBinding method = messageSend.binding;
	if (method == null) return INACCURATE_MATCH;

	int methodLevel = matchMethod(method);
	if (methodLevel == IMPOSSIBLE_MATCH) return IMPOSSIBLE_MATCH;

	// receiver type
	char[] qualifiedPattern = qualifiedPattern(this.pattern.declaringSimpleName, this.pattern.declaringQualification);
	if (qualifiedPattern == null) return methodLevel; // since any declaring class will do

	int declaringLevel;
	if (isVirtualInvoke(method, messageSend) && !(messageSend.receiverType instanceof ArrayBinding)) {
	declaringLevel = resolveLevelAsSubtype(qualifiedPattern, method.declaringClass);
	if (declaringLevel == IMPOSSIBLE_MATCH) {
	if (method.declaringClass == null \|\| this.allSuperDeclaringTypeNames == null) {
	declaringLevel = INACCURATE_MATCH;
	} else {
	char[][] compoundName = method.declaringClass.compoundName;
	for (int i = 0, max = this.allSuperDeclaringTypeNames.length; i < max; i++)
	if (CharOperation.equals(this.allSuperDeclaringTypeNames[i], compoundName))
	return methodLevel; // since this is an ACCURATE_MATCH so return the possibly weaker match
	}
	}
	} else {
	declaringLevel = resolveLevelForType(qualifiedPattern, method.declaringClass);
	}
	return methodLevel > declaringLevel ? declaringLevel : methodLevel; // return the weaker match
	}
	/**
	* Returns whether the given reference type binding matches or is a subtype of a type
	* that matches the given qualified pattern.
	* Returns ACCURATE_MATCH if it does.
	* Returns INACCURATE_MATCH if resolve fails
	* Returns IMPOSSIBLE_MATCH if it doesn't.
	*/
	protected int resolveLevelAsSubtype(char[] qualifiedPattern, ReferenceBinding type) {
	if (type == null) return INACCURATE_MATCH;

	int level = resolveLevelForType(qualifiedPattern, type);
	if (level != IMPOSSIBLE_MATCH) return level;

	// matches superclass
	if (!type.isInterface() && !CharOperation.equals(type.compoundName, TypeConstants.JAVA_LANG_OBJECT)) {
	level = resolveLevelAsSubtype(qualifiedPattern, type.superclass());
	if (level != IMPOSSIBLE_MATCH) return level;
	}

	// matches interfaces
	ReferenceBinding[] interfaces = type.superInterfaces();
	if (interfaces == null) return INACCURATE_MATCH;
	for (int i = 0; i < interfaces.length; i++) {
	level = resolveLevelAsSubtype(qualifiedPattern, interfaces[i]);
	if (level != IMPOSSIBLE_MATCH) return level;
	}
	return IMPOSSIBLE_MATCH;
	}
	public String toString() {
	return "Locator for " + this.pattern.toString(); //$NON-NLS-1$
	}
	}