Source Code Cross Referenced for InteractionsEventNotifier.java in  » IDE » DrJava » edu » rice » cs » drjava » model » repl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE » DrJava » edu.rice.cs.drjava.model.repl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*BEGIN_COPYRIGHT_BLOCK
002:         *
003:         * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
004:         * All rights reserved.
005:         * 
006:         * Redistribution and use in source and binary forms, with or without
007:         * modification, are permitted provided that the following conditions are met:
008:         *    * Redistributions of source code must retain the above copyright
009:         *      notice, this list of conditions and the following disclaimer.
010:         *    * Redistributions in binary form must reproduce the above copyright
011:         *      notice, this list of conditions and the following disclaimer in the
012:         *      documentation and/or other materials provided with the distribution.
013:         *    * Neither the names of DrJava, the JavaPLT group, Rice University, nor the
014:         *      names of its contributors may be used to endorse or promote products
015:         *      derived from this software without specific prior written permission.
016:         * 
017:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
018:         * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
019:         * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
020:         * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
021:         * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
022:         * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
023:         * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
024:         * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
025:         * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
026:         * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
027:         * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
028:         *
029:         * This software is Open Source Initiative approved Open Source Software.
030:         * Open Source Initative Approved is a trademark of the Open Source Initiative.
031:         * 
032:         * This file is part of DrJava.  Download the current version of this project
033:         * from http://www.drjava.org/ or http://sourceforge.net/projects/drjava/
034:         * 
035:         * END_COPYRIGHT_BLOCK*/
036:
037:        package edu.rice.cs.drjava.model.repl;
038:
039:        import java.io.File;
040:
041:        import edu.rice.cs.drjava.model.EventNotifier;
042:
043:        /** Keeps track of all listeners to an InteractionsModel, and has the ability to notify them of some event. <p>
044:         *  This class has a specific role of managing InteractionsListeners.  Other classes with similar names use similar 
045:         *  code to perform the same function for other interfaces, e.g. JavadocEventNotifier and GlobalEventNotifier.
046:         *  These classes implement the appropriate interface definition so that they can be used transparently as composite 
047:         *  packaging for a particular listener interface. <p>
048:         *  Components which might otherwise manage their own list of listeners use EventNotifiers instead to simplify their 
049:         *  internal implementation.  Notifiers should therefore be considered a private implementation detail of the
050:         *  components, and should not be used directly outside of the "host" component. <p>
051:         *  All methods in this class must use the synchronization methods provided by ReaderWriterLock.  This ensures 
052:         *  that multiple notifications (reads) can occur simultaneously, but only one thread can be adding or removing 
053:         *  listeners (writing) at a time, and no reads can occur during a write. <p>
054:         *  <i>No</i> methods on this class should be synchronized using traditional Java synchronization! <p>
055:         *  @version $Id: InteractionsEventNotifier.java 4255 2007-08-28 19:17:37Z mgricken $
056:         */
057:
058:        public class InteractionsEventNotifier extends
059:                EventNotifier<InteractionsListener> implements 
060:                InteractionsListener {
061:
062:            /** Called after an interaction is started by the GlobalModel. */
063:            public void interactionStarted() {
064:                _lock.startRead();
065:                try {
066:                    int size = _listeners.size();
067:                    for (int i = 0; i < size; i++)
068:                        _listeners.get(i).interactionStarted();
069:                } finally {
070:                    _lock.endRead();
071:                }
072:            }
073:
074:            /** Called when an interaction has finished running. */
075:            public void interactionEnded() {
076:                _lock.startRead();
077:                try {
078:                    int size = _listeners.size();
079:                    for (int i = 0; i < size; i++)
080:                        _listeners.get(i).interactionEnded();
081:                } finally {
082:                    _lock.endRead();
083:                }
084:            }
085:
086:            /** Called when the interactions window generates a syntax error.
087:             *  @param offset the error's offset into the InteractionsDocument
088:             *  @param length the length of the error
089:             */
090:            public void interactionErrorOccurred(int offset, int length) {
091:                _lock.startRead();
092:                try {
093:                    int size = _listeners.size();
094:                    for (int i = 0; i < size; i++)
095:                        _listeners.get(i).interactionErrorOccurred(offset,
096:                                length);
097:                } finally {
098:                    _lock.endRead();
099:                }
100:            }
101:
102:            /** Called when the interactionsJVM has begun resetting. */
103:            public void interpreterResetting() {
104:                _lock.startRead();
105:                try {
106:                    int size = _listeners.size();
107:                    //      Utilities.showDebug("InteractionsEventNotifier: interpreterResetting called on " + size + " listeners");
108:                    for (int i = 0; i < size; i++)
109:                        _listeners.get(i).interpreterResetting();
110:                } finally {
111:                    _lock.endRead();
112:                }
113:            }
114:
115:            /** Called when the interactions window is reset. */
116:            public void interpreterReady(File wd) {
117:                _lock.startRead();
118:                try {
119:                    int size = _listeners.size();
120:                    for (int i = 0; i < size; i++)
121:                        _listeners.get(i).interpreterReady(wd);
122:                } finally {
123:                    _lock.endRead();
124:                }
125:            }
126:
127:            /** Called if the interpreter reset failed.
128:             *  @param t Throwable explaining why the reset failed. (Subclasses must maintain listeners.)
129:             */
130:            public void interpreterResetFailed(final Throwable t) {
131:                _lock.startRead();
132:                try {
133:                    int size = _listeners.size();
134:                    for (int i = 0; i < size; i++)
135:                        _listeners.get(i).interpreterResetFailed(t);
136:                } finally {
137:                    _lock.endRead();
138:                }
139:            }
140:
141:            /** Called when the interactions JVM was closed by System.exit or by being aborted. Immediately after this the 
142:             *  interactions will be reset.
143:             *  @param status the exit code
144:             */
145:            public void interpreterExited(int status) {
146:                _lock.startRead();
147:                try {
148:                    int size = _listeners.size();
149:                    for (int i = 0; i < size; i++) {
150:                        _listeners.get(i).interpreterExited(status);
151:                    }
152:                } finally {
153:                    _lock.endRead();
154:                }
155:            }
156:
157:            /** Called when the active interpreter is changed.
158:             *  @param inProgress Whether the new interpreter is currently in progress with an interaction (ie. whether an 
159:             *  interactionEnded event will be fired)
160:             */
161:            public void interpreterChanged(boolean inProgress) {
162:                _lock.startRead();
163:                try {
164:                    int size = _listeners.size();
165:                    for (int i = 0; i < size; i++)
166:                        _listeners.get(i).interpreterChanged(inProgress);
167:                } finally {
168:                    _lock.endRead();
169:                }
170:            }
171:
172:            /** Notifies the view that the current interaction is incomplete. */
173:            public void interactionIncomplete() {
174:                _lock.startRead();
175:                try {
176:                    int size = _listeners.size();
177:                    for (int i = 0; i < size; i++)
178:                        _listeners.get(i).interactionIncomplete();
179:                } finally {
180:                    _lock.endRead();
181:                }
182:            }
183:
184:            /** Notifies listeners that the slaveJVM has been used. */
185:            public void slaveJVMUsed() {
186:                _lock.startRead();
187:                try {
188:                    int size = _listeners.size();
189:                    for (int i = 0; i < size; i++)
190:                        _listeners.get(i).slaveJVMUsed();
191:                } finally {
192:                    _lock.endRead();
193:                }
194:            }
195:        }
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