TypeDeclarationLocator.java

/*******************************************************************************
 * Copyright (c) 2000, 2009 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.core.search.matching;

import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.lookup.Binding;
import org.eclipse.jdt.internal.compiler.lookup.ProblemReferenceBinding;
import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;

public class TypeDeclarationLocator extends PatternLocator {

	protected TypeDeclarationPattern pattern; // can be a QualifiedTypeDeclarationPattern

	public TypeDeclarationLocator(TypeDeclarationPattern pattern) {
		super(pattern);

		this.pattern= pattern;
	}

//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) - SKIP IT
//public int match(MessageSend node, MatchingNodeSet nodeSet) - SKIP IT
//public int match(Reference node, MatchingNodeSet nodeSet) - SKIP IT
	public int match(TypeDeclaration node, MatchingNodeSet nodeSet) {
		if (this.pattern.simpleName == null || matchesName(this.pattern.simpleName, node.name))
			return nodeSet.addMatch(node, this.pattern.mustResolve ? POSSIBLE_MATCH : ACCURATE_MATCH);

		return IMPOSSIBLE_MATCH;
	}

//public int match(TypeReference node, MatchingNodeSet nodeSet) - SKIP IT

	public int resolveLevel(ASTNode node) {
		if (!(node instanceof TypeDeclaration))
			return IMPOSSIBLE_MATCH;

		return resolveLevel(((TypeDeclaration)node).binding);
	}

	public int resolveLevel(Binding binding) {
		if (binding == null)
			return INACCURATE_MATCH;
		if (!(binding instanceof TypeBinding))
			return IMPOSSIBLE_MATCH;

		TypeBinding type= (TypeBinding)binding;

		switch (this.pattern.typeSuffix) {
			case CLASS_SUFFIX:
				if (!type.isClass())
					return IMPOSSIBLE_MATCH;
				break;
			case CLASS_AND_INTERFACE_SUFFIX:
				if (!(type.isClass() || (type.isInterface() && !type.isAnnotationType())))
					return IMPOSSIBLE_MATCH;
				break;
			case CLASS_AND_ENUM_SUFFIX:
				if (!(type.isClass() || type.isEnum()))
					return IMPOSSIBLE_MATCH;
				break;
			case INTERFACE_SUFFIX:
				if (!type.isInterface() || type.isAnnotationType())
					return IMPOSSIBLE_MATCH;
				break;
			case INTERFACE_AND_ANNOTATION_SUFFIX:
				if (!(type.isInterface() || type.isAnnotationType()))
					return IMPOSSIBLE_MATCH;
				break;
			case ENUM_SUFFIX:
				if (!type.isEnum())
					return IMPOSSIBLE_MATCH;
				break;
			case ANNOTATION_TYPE_SUFFIX:
				if (!type.isAnnotationType())
					return IMPOSSIBLE_MATCH;
				break;
			case TYPE_SUFFIX: // nothing
		}

		// fully qualified name
		if (this.pattern instanceof QualifiedTypeDeclarationPattern) {
			QualifiedTypeDeclarationPattern qualifiedPattern= (QualifiedTypeDeclarationPattern)this.pattern;
			return resolveLevelForType(qualifiedPattern.simpleName, qualifiedPattern.qualification, type);
		} else {
			char[] enclosingTypeName= this.pattern.enclosingTypeNames == null ? null : CharOperation.concatWith(this.pattern.enclosingTypeNames, '.');
			return resolveLevelForType(this.pattern.simpleName, this.pattern.pkg, enclosingTypeName, type);
		}
	}

	/**
	 * Returns whether the given type binding matches the given simple name pattern qualification
	 * pattern and enclosing type name pattern.
	 */
	protected int resolveLevelForType(char[] simpleNamePattern, char[] qualificationPattern, char[] enclosingNamePattern, TypeBinding type) {
		if (enclosingNamePattern == null)
			return resolveLevelForType(simpleNamePattern, qualificationPattern, type);
		if (qualificationPattern == null)
			return resolveLevelForType(simpleNamePattern, enclosingNamePattern, type);

		// case of an import reference while searching for ALL_OCCURENCES of a type (see bug 37166)
		if (type instanceof ProblemReferenceBinding)
			return IMPOSSIBLE_MATCH;

		// pattern was created from a Java element: qualification is the package name.
		char[] fullQualificationPattern= CharOperation.concat(qualificationPattern, enclosingNamePattern, '.');
		if (CharOperation.equals(this.pattern.pkg, CharOperation.concatWith(type.getPackage().compoundName, '.')))
			return resolveLevelForType(simpleNamePattern, fullQualificationPattern, type);
		return IMPOSSIBLE_MATCH;
	}

	public String toString() {
		return "Locator for " + this.pattern.toString(); //$NON-NLS-1$
	}
}