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
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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
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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.infrastructure;
043:
044: import org.netbeans.modules.java.hints.infrastructure.CreatorBasedLazyFixList;
045: import org.netbeans.modules.java.hints.*;
046: import java.lang.ref.Reference;
047: import java.lang.ref.WeakReference;
048: import java.util.ArrayList;
049: import java.util.Collections;
050: import java.util.List;
051: import java.util.Map;
052: import java.util.WeakHashMap;
053: import org.netbeans.api.java.source.CancellableTask;
054: import org.netbeans.api.java.source.CompilationInfo;
055: import org.netbeans.api.java.source.JavaSource.Phase;
056: import org.netbeans.api.java.source.JavaSource.Priority;
057: import org.netbeans.api.java.source.support.EditorAwareJavaSourceTaskFactory;
058: import org.openide.filesystems.FileObject;
059: import org.openide.util.Lookup;
060:
061: /**
062: *
063: * @author Jan Lahoda
064: */
065: public class LazyHintComputationFactory extends
066: EditorAwareJavaSourceTaskFactory {
067:
068: private static Map<FileObject, List<Reference<CreatorBasedLazyFixList>>> file2Creators = new WeakHashMap<FileObject, List<Reference<CreatorBasedLazyFixList>>>();
069:
070: /** Creates a new instance of LazyHintComputationFactory */
071: public LazyHintComputationFactory() {
072: super (Phase.RESOLVED, Priority.LOW);
073: }
074:
075: public CancellableTask<CompilationInfo> createTask(FileObject file) {
076: return new LazyHintComputation(file);
077: }
078:
079: private static void rescheduleImpl(FileObject file) {
080: LazyHintComputationFactory f = Lookup.getDefault().lookup(
081: LazyHintComputationFactory.class);
082:
083: if (f != null) {
084: f.reschedule(file);
085: }
086: }
087:
088: public static void addToCompute(FileObject file,
089: CreatorBasedLazyFixList list) {
090: synchronized (LazyHintComputationFactory.class) {
091: List<Reference<CreatorBasedLazyFixList>> references = file2Creators
092: .get(file);
093:
094: if (references == null) {
095: file2Creators
096: .put(
097: file,
098: references = new ArrayList<Reference<CreatorBasedLazyFixList>>());
099: }
100:
101: references.add(new WeakReference(list));
102: }
103:
104: rescheduleImpl(file);
105: }
106:
107: public static synchronized List<CreatorBasedLazyFixList> getAndClearToCompute(
108: FileObject file) {
109: List<Reference<CreatorBasedLazyFixList>> references = file2Creators
110: .get(file);
111:
112: if (references == null) {
113: return Collections.emptyList();
114: }
115:
116: List<CreatorBasedLazyFixList> result = new ArrayList<CreatorBasedLazyFixList>();
117:
118: for (Reference<CreatorBasedLazyFixList> r : references) {
119: CreatorBasedLazyFixList c = r.get();
120:
121: if (c != null) {
122: result.add(c);
123: }
124: }
125:
126: references.clear();
127:
128: return result;
129: }
130: }
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