001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041:
042: package org.netbeans.modules.refactoring.java.plugins;
043:
044: import com.sun.source.tree.*;
045: import com.sun.source.util.TreePath;
046: import com.sun.source.util.Trees;
047: import java.util.List;
048: import javax.lang.model.element.*;
049: import javax.lang.model.type.TypeMirror;
050: import javax.lang.model.util.Types;
051: import org.netbeans.api.java.source.WorkingCopy;
052:
053: /**
054: *
055: * @author Jan Becicka
056: */
057: public class FindSubtypesVisitor extends FindVisitor {
058:
059: private boolean recursive;
060:
061: public FindSubtypesVisitor(boolean recursive,
062: WorkingCopy workingCopy) {
063: super (workingCopy);
064: this .recursive = recursive;
065: }
066:
067: @Override
068: public Tree visitClass(ClassTree node, Element elementToFind) {
069: if (workingCopy.getTreeUtilities()
070: .isSynthetic(getCurrentPath())) {
071: return super .visitClass(node, elementToFind);
072: }
073: if (recursive) {
074: if (isSubtype(getCurrentPath(), elementToFind)) {
075: addUsage(getCurrentPath());
076: }
077: } else {
078: TypeElement el = (TypeElement) workingCopy.getTrees()
079: .getElement(getCurrentPath());
080: Types types = workingCopy.getTypes();
081: if (el.getSuperclass() != null
082: && types.isSameType(types.erasure(el
083: .getSuperclass()), types
084: .erasure(elementToFind.asType()))
085: || containsType(el.getInterfaces(), elementToFind
086: .asType())) {
087: addUsage(getCurrentPath());
088: }
089: }
090: return super .visitClass(node, elementToFind);
091: }
092:
093: private boolean containsType(List<? extends TypeMirror> list,
094: TypeMirror t) {
095: Types types = workingCopy.getTypes();
096: t = types.erasure(t);
097: for (TypeMirror m : list) {
098: if (types.isSameType(t, types.erasure(m))) {
099: return true;
100: }
101: ;
102: }
103: return false;
104: }
105:
106: protected boolean isSubtype(TreePath t1, Element t2) {
107: Types types = workingCopy.getTypes();
108: Trees trees = workingCopy.getTrees();
109: TypeMirror tm1 = types.erasure(trees.getTypeMirror(t1));
110: TypeMirror tm2 = types.erasure(t2.asType());
111:
112: return types.isSubtype(tm1, tm2) && !types.isSameType(tm1, tm2);
113: }
114:
115: }
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