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.java.hints.errors;
043:
044: import com.sun.source.tree.ExpressionTree;
045: import com.sun.source.tree.Tree;
046: import com.sun.source.tree.VariableTree;
047: import java.io.IOException;
048: import javax.lang.model.type.TypeMirror;
049: import org.netbeans.api.java.source.Task;
050: import org.netbeans.api.java.source.JavaSource;
051: import org.netbeans.api.java.source.TreeMaker;
052: import org.netbeans.api.java.source.JavaSource.Phase;
053: import org.netbeans.api.java.source.WorkingCopy;
054: import org.netbeans.spi.editor.hints.ChangeInfo;
055: import org.netbeans.spi.editor.hints.Fix;
056: import org.openide.ErrorManager;
057: import org.openide.util.NbBundle;
058:
059: /**
060: * This hint changes the type of a variable to the type of
061: * initializer expression. In effect it works opposite of
062: * Add Cast hint.
063: *
064: * @author Sandip Chitale
065: */
066: final class ChangeTypeFix implements Fix {
067:
068: private JavaSource js;
069: private String treeName;
070: private String type;
071: private int position;
072:
073: public ChangeTypeFix(JavaSource js, String treeName, String type,
074: int position) {
075: this .js = js;
076: this .treeName = treeName;
077: this .type = type;
078: this .position = position;
079: }
080:
081: public ChangeInfo implement() throws IOException {
082: js.runModificationTask(new Task<WorkingCopy>() {
083: public void run(final WorkingCopy working)
084: throws IOException {
085: working.toPhase(Phase.RESOLVED);
086: TypeMirror[] tm = new TypeMirror[1];
087: ExpressionTree[] expression = new ExpressionTree[1];
088: TypeMirror[] expressionType = new TypeMirror[1];
089: Tree[] leaf = new Tree[1];
090:
091: ChangeType.computeType(working, position, tm,
092: expression, expressionType, leaf);
093:
094: if (leaf[0] instanceof VariableTree) {
095: VariableTree oldVariableTree = ((VariableTree) leaf[0]);
096: TreeMaker make = working.getTreeMaker();
097:
098: VariableTree newVariableTree = make.Variable(
099: oldVariableTree.getModifiers(),
100: oldVariableTree.getName(), make
101: .Type(expressionType[0]),
102: oldVariableTree.getInitializer());
103:
104: working.rewrite(leaf[0], newVariableTree);
105: }
106: }
107: }).commit();
108:
109: return null;
110: }
111:
112: public String getText() {
113: return NbBundle.getMessage(ChangeTypeFix.class,
114: "MSG_ChangeVariablesType", treeName, type); // NOI18N
115: }
116:
117: }
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