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: package org.netbeans.modules.java.hints.errors;
042:
043: import com.sun.source.tree.Tree.Kind;
044: import com.sun.source.tree.TypeCastTree;
045: import com.sun.source.util.TreePath;
046: import java.io.IOException;
047: import java.util.Collections;
048: import java.util.List;
049: import java.util.Set;
050: import org.netbeans.api.java.source.Task;
051: import org.netbeans.api.java.source.CompilationInfo;
052: import org.netbeans.api.java.source.JavaSource;
053: import org.netbeans.api.java.source.JavaSource.Phase;
054: import org.netbeans.api.java.source.TreePathHandle;
055: import org.netbeans.api.java.source.WorkingCopy;
056: import org.netbeans.modules.java.hints.spi.ErrorRule;
057: import org.netbeans.spi.editor.hints.ChangeInfo;
058: import org.netbeans.spi.editor.hints.Fix;
059: import org.openide.util.Exceptions;
060: import org.openide.util.NbBundle;
061:
062: /**
063: *
064: * @author Jan Lahoda
065: */
066: public final class RemoveUselessCast implements ErrorRule<Void> {
067:
068: public RemoveUselessCast() {
069: }
070:
071: public Set<String> getCodes() {
072: return Collections.singleton("compiler.warn.redundant.cast"); // NOI18N
073: }
074:
075: public List<Fix> run(CompilationInfo info, String diagnosticKey,
076: int offset, TreePath treePath, Data<Void> data) {
077: TreePath path = info.getTreeUtilities().pathFor(offset + 1);
078:
079: if (path != null && path.getLeaf().getKind() == Kind.TYPE_CAST) {
080: TreePathHandle handle = TreePathHandle.create(path, info);
081:
082: return Collections.<Fix> singletonList(new FixImpl(info
083: .getJavaSource(), handle));
084: }
085:
086: return Collections.<Fix> emptyList();
087: }
088:
089: public void cancel() {
090: //XXX: not yet implemented
091: }
092:
093: public String getId() {
094: return RemoveUselessCast.class.getName();
095: }
096:
097: public String getDisplayName() {
098: return NbBundle.getMessage(RemoveUselessCast.class,
099: "LBL_Remove_Useless_Cast_Fix");
100: }
101:
102: public String getDescription() {
103: return NbBundle.getMessage(RemoveUselessCast.class,
104: "DSC_Remove_Useless_Cast_Fix");
105: }
106:
107: private static final class FixImpl implements Fix {
108:
109: private JavaSource js;
110: private TreePathHandle handle;
111:
112: public FixImpl(JavaSource js, TreePathHandle handle) {
113: this .js = js;
114: this .handle = handle;
115: }
116:
117: public String getText() {
118: return NbBundle.getMessage(RemoveUselessCast.class,
119: "LBL_FIX_Remove_redundant_cast");
120: }
121:
122: public ChangeInfo implement() throws IOException {
123: js.runModificationTask(new Task<WorkingCopy>() {
124: public void run(WorkingCopy copy) throws IOException {
125: copy.toPhase(Phase.RESOLVED);
126: TreePath path = handle.resolve(copy);
127:
128: if (path != null) {
129: TypeCastTree tct = (TypeCastTree) path
130: .getLeaf();
131:
132: copy.rewrite(tct, tct.getExpression());
133: }
134: }
135:
136: }).commit();
137:
138: return null;
139: }
140: }
141: }
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