Source Code Cross Referenced for WindowImpl.java in  » 6.0-JDK-Modules » j2me » com » sun » jumpimpl » module » windowing » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.jumpimpl.module.windowing 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * %W% %E%
003:         *
004:         * Copyright  1990-2006 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         *
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation.
010:         *
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt).
016:         *
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA
021:         *
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions.
025:         */
026:
027:        package com.sun.jumpimpl.module.windowing;
028:
029:        import com.sun.jump.executive.JUMPExecutive;
030:        import com.sun.jump.common.JUMPIsolate;
031:        import com.sun.jump.common.JUMPWindow;
032:
033:        import com.sun.jumpimpl.process.JUMPIsolateProxyImpl;
034:
035:        import java.util.TreeMap;
036:        import java.util.Comparator;
037:
038:        public class WindowImpl extends JUMPWindow {
039:            public static int executiveId = JUMPExecutive.getInstance()
040:                    .getProcessId();
041:
042:            private String state;
043:            private int id;
044:            private int isolateId;
045:
046:            private static long getKey(Object o) {
047:                if (o == null || !(o instanceof  WindowImpl)) {
048:                    return 0;
049:                }
050:
051:                WindowImpl w = (WindowImpl) o;
052:
053:                long res = w.id;
054:                return (res << 32 | w.isolateId);
055:            }
056:
057:            // all known windows
058:            // use TreeMap and not HashMap or something similar to enforce use of
059:            // custom comparator that ignores WindowImpl#state member field in key
060:            // generation
061:            private static TreeMap windows = new TreeMap(new Comparator() {
062:                public int compare(Object o1, Object o2) {
063:                    long res = (getKey(o1) - getKey(o2));
064:                    if (res < 0) {
065:                        return -1;
066:                    }
067:                    if (res > 0) {
068:                        return 1;
069:                    }
070:                    return 0;
071:                }
072:            });
073:            // key to reuse in window look up
074:            private static WindowImpl key = new WindowImpl(0, 0);
075:
076:            private WindowImpl(int isolateId, int id) {
077:                this .id = id;
078:                this .isolateId = isolateId;
079:
080:                JUMPIsolateProxyImpl isolateProxy = (JUMPIsolateProxyImpl) getIsolate();
081:                if (isolateProxy != null) {
082:                    isolateProxy.registerWindow(this );
083:                }
084:            }
085:
086:            static synchronized WindowImpl getWindow(int isolateId, int id) {
087:                // don't create key for look up, instead initialize precreated one
088:                key.id = id;
089:                key.isolateId = isolateId;
090:
091:                WindowImpl w = (WindowImpl) windows.get(key);
092:                if (w == null) {
093:                    w = new WindowImpl(isolateId, id);
094:                    windows.put(w, w);
095:                }
096:
097:                return w;
098:            }
099:
100:            void setState(String state) {
101:                this .state = state;
102:            }
103:
104:            public String getState() {
105:                return this .state;
106:            }
107:
108:            public int getId() {
109:                return this .id;
110:            }
111:
112:            public JUMPIsolate getIsolate() {
113:                if (isolateId == executiveId) {
114:                    // this WindowImpl was created in executive's VM
115:                    return null;
116:                }
117:
118:                return JUMPExecutive.getInstance().getIsolateFactory()
119:                        .getIsolate(isolateId);
120:            }
121:        }
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