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 threaddemo.model;
043:
044: import java.io.File;
045: import java.io.IOException;
046: import java.io.InputStream;
047: import java.io.OutputStream;
048: import java.util.List;
049: import threaddemo.locking.RWLock;
050: import threaddemo.locking.Locks;
051: import threaddemo.locking.PrivilegedLock;
052:
053: /**
054: * A phadhail in which all model methods are locked with a plain lock.
055: * In this variant, the impl acquires locks automatically, though another
056: * style would be to require the client to do this.
057: * @author Jesse Glick
058: */
059: final class LockedPhadhail extends AbstractPhadhail {
060:
061: private static final PrivilegedLock PLOCK = new PrivilegedLock();
062: static {
063: Locks.readWrite(PLOCK);
064: }
065:
066: private static final AbstractPhadhail.Factory FACTORY = new AbstractPhadhail.Factory() {
067: public AbstractPhadhail create(File f) {
068: return new LockedPhadhail(f);
069: }
070: };
071:
072: public static Phadhail create(File f) {
073: return forFile(f, FACTORY);
074: }
075:
076: private LockedPhadhail(File f) {
077: super (f);
078: }
079:
080: protected Factory factory() {
081: return FACTORY;
082: }
083:
084: public List<Phadhail> getChildren() {
085: PLOCK.enterRead();
086: try {
087: return super .getChildren();
088: } finally {
089: PLOCK.exitRead();
090: }
091: }
092:
093: public String getName() {
094: PLOCK.enterRead();
095: try {
096: return super .getName();
097: } finally {
098: PLOCK.exitRead();
099: }
100: }
101:
102: public String getPath() {
103: PLOCK.enterRead();
104: try {
105: return super .getPath();
106: } finally {
107: PLOCK.exitRead();
108: }
109: }
110:
111: public boolean hasChildren() {
112: PLOCK.enterRead();
113: try {
114: return super .hasChildren();
115: } finally {
116: PLOCK.exitRead();
117: }
118: }
119:
120: public void rename(String nue) throws IOException {
121: PLOCK.enterWrite();
122: try {
123: super .rename(nue);
124: } finally {
125: PLOCK.exitWrite();
126: }
127: }
128:
129: public Phadhail createContainerPhadhail(String name)
130: throws IOException {
131: PLOCK.enterWrite();
132: try {
133: return super .createContainerPhadhail(name);
134: } finally {
135: PLOCK.exitWrite();
136: }
137: }
138:
139: public Phadhail createLeafPhadhail(String name) throws IOException {
140: PLOCK.enterWrite();
141: try {
142: return super .createLeafPhadhail(name);
143: } finally {
144: PLOCK.exitWrite();
145: }
146: }
147:
148: public void delete() throws IOException {
149: PLOCK.enterWrite();
150: try {
151: super .delete();
152: } finally {
153: PLOCK.exitWrite();
154: }
155: }
156:
157: public InputStream getInputStream() throws IOException {
158: PLOCK.enterRead();
159: try {
160: return super .getInputStream();
161: } finally {
162: PLOCK.exitRead();
163: }
164: }
165:
166: public OutputStream getOutputStream() throws IOException {
167: // See comment in AbstractPhadhail re. use of read access.
168: PLOCK.enterRead();
169: try {
170: return super .getOutputStream();
171: } finally {
172: PLOCK.exitRead();
173: }
174: }
175:
176: public RWLock lock() {
177: return PLOCK.getLock();
178: }
179:
180: }
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