Source Code Cross Referenced for COSCompositeObject.java in  » PDF » jPod » de » intarsys » pdf » cos » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » PDF » jPod » de.intarsys.pdf.cos 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 2007, intarsys consulting GmbH
003:         *
004:         * Redistribution and use in source and binary forms, with or without
005:         * modification, are permitted provided that the following conditions are met:
006:         *
007:         * - Redistributions of source code must retain the above copyright notice,
008:         *   this list of conditions and the following disclaimer.
009:         *
010:         * - Redistributions in binary form must reproduce the above copyright notice,
011:         *   this list of conditions and the following disclaimer in the documentation
012:         *   and/or other materials provided with the distribution.
013:         *
014:         * - Neither the name of intarsys nor the names of its contributors may be used
015:         *   to endorse or promote products derived from this software without specific
016:         *   prior written permission.
017:         *
018:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019:         * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020:         * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021:         * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
022:         * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
023:         * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
024:         * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
025:         * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
026:         * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
027:         * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
028:         * POSSIBILITY OF SUCH DAMAGE.
029:         */
030:        package de.intarsys.pdf.cos;
031:
032:        import java.util.ArrayList;
033:        import java.util.HashMap;
034:        import java.util.Iterator;
035:        import java.util.List;
036:        import java.util.Map;
037:        import de.intarsys.tools.attribute.IAttributeSupport;
038:
039:        /**
040:         * A superclass implementation for all containers of other {@link COSObject}
041:         * instances.
042:         * 
043:         */
044:        abstract public class COSCompositeObject extends COSObject implements 
045:                ICOSContainer, IAttributeSupport {
046:            /**
047:             * Generic attribute support
048:             */
049:            private Map attributes;
050:
051:            /**
052:             * Collection of listeners to object changes
053:             */
054:            protected List objectListeners;
055:
056:            protected COSCompositeObject() {
057:                super ();
058:            }
059:
060:            /**
061:             * Copy constructor for creating save state.
062:             * 
063:             * @param object
064:             *            The original object.
065:             */
066:            protected COSCompositeObject(COSObject object) {
067:                super (object);
068:            }
069:
070:            /*
071:             * (non-Javadoc)
072:             * 
073:             * @see de.intarsys.tools.attribute.IAttributeSupport#setAttribute(java.lang.Object,
074:             *      java.lang.Object)
075:             */
076:            synchronized public Object setAttribute(Object key, Object value) {
077:                if (attributes == null) {
078:                    attributes = new HashMap();
079:                }
080:                return attributes.put(key, value);
081:            }
082:
083:            /**
084:             * Change the reference to the object contained in this to an indirect one
085:             * via reference.
086:             * 
087:             * <p>
088:             * This method must be redefined by all containers to reflect the new
089:             * reference type in their child references.
090:             * </p>
091:             * 
092:             * <p>
093:             * This event is delegated to the document to create the correct state for a
094:             * new indirect object. If a document is not yet present, the state is
095:             * changed when the COSObject (s) are added to the document finally. This
096:             * can happen when constructing a COSObject graph "offline" and later add it
097:             * to the document.
098:             * </p>
099:             * 
100:             * <p>
101:             * From the COS invariants you can be sure that the object referenced by ref
102:             * is contained in this at most once
103:             * </p>
104:             * 
105:             * @param object
106:             */
107:            public COSIndirectObject referenceIndirect(COSObject object) {
108:                return COSIndirectObject.create(object);
109:            }
110:
111:            /*
112:             * (non-Javadoc)
113:             * 
114:             * @see de.intarsys.pdf.cos.ICOSContainer#willChange(de.intarsys.pdf.cos.COSObject)
115:             */
116:            public void willChange(COSObject change) {
117:                container.willChange(change);
118:            }
119:
120:            /*
121:             * (non-Javadoc)
122:             * 
123:             * @see de.intarsys.pdf.cos.COSObject#isPrimitive()
124:             */
125:            public boolean isPrimitive() {
126:                return false;
127:            }
128:
129:            /*
130:             * (non-Javadoc)
131:             * 
132:             * @see de.intarsys.tools.component.IAttributeSupport#getAttribute(java.lang.Object)
133:             */
134:            synchronized public Object getAttribute(Object key) {
135:                if (attributes == null) {
136:                    return null;
137:                }
138:                return attributes.get(key);
139:            }
140:
141:            /*
142:             * (non-Javadoc)
143:             * 
144:             * @see de.intarsys.tools.component.IAttributeSupport#removeAttribute(java.lang.Object)
145:             */
146:            synchronized public Object removeAttribute(Object key) {
147:                if (attributes != null) {
148:                    attributes.remove(key);
149:                }
150:                return null;
151:            }
152:
153:            /*
154:             * (non-Javadoc)
155:             * 
156:             * @see de.intarsys.pdf.cos.COSObject#addObjectListener(de.intarsys.pdf.cos.ICOSObjectListener)
157:             */
158:            public void addObjectListener(ICOSObjectListener listener) {
159:                List newListeners;
160:                if (objectListeners == null) {
161:                    newListeners = new ArrayList();
162:                } else {
163:                    newListeners = new ArrayList(objectListeners);
164:                }
165:                newListeners.add(listener);
166:                objectListeners = newListeners;
167:            }
168:
169:            /* (non-Javadoc)
170:             * @see de.intarsys.pdf.cos.COSObject#isObjectListenerAvailable()
171:             */
172:            public boolean isObjectListenerAvailable() {
173:                if (objectListeners == null) {
174:                    return false;
175:                } else {
176:                    return !objectListeners.isEmpty();
177:                }
178:            }
179:
180:            /*
181:             * (non-Javadoc)
182:             * 
183:             * @see de.intarsys.pdf.cos.COSObject#removeObjectListener(de.intarsys.pdf.cos.ICOSObjectListener)
184:             */
185:            public void removeObjectListener(ICOSObjectListener listener) {
186:                if (objectListeners == null) {
187:                    return;
188:                }
189:                List newListeners;
190:                newListeners = new ArrayList(objectListeners);
191:                newListeners.remove(listener);
192:                objectListeners = newListeners;
193:            }
194:
195:            /*
196:             * (non-Javadoc)
197:             * 
198:             * @see de.intarsys.pdf.cos.ICOSContainer#associate(de.intarsys.pdf.cos.ICOSContainer,
199:             *      de.intarsys.pdf.cos.COSObject)
200:             */
201:            public ICOSContainer associate(ICOSContainer newContainer,
202:                    COSObject object) {
203:                if (newContainer == this ) {
204:                    // error ?
205:                    return this ;
206:                }
207:
208:                // sorry, this is an error
209:                throw new IllegalStateException(
210:                        "object may only be contained once (use indirect object)"); //$NON-NLS-1$
211:            }
212:
213:            /*
214:             * (non-Javadoc)
215:             * 
216:             * @see de.intarsys.pdf.cos.ICOSContainer#disassociate(de.intarsys.pdf.cos.ICOSContainer,
217:             *      de.intarsys.pdf.cos.COSObject)
218:             */
219:            public ICOSContainer disassociate(ICOSContainer oldContainer,
220:                    COSObject object) {
221:                if (oldContainer == this ) {
222:                    // object removed from container
223:                    object.basicSetContainer(COSObject.NULL_CONTAINER);
224:                    return COSObject.NULL_CONTAINER;
225:                }
226:
227:                // sorry, this is an error
228:                throw new IllegalStateException("association inconsistent"); //$NON-NLS-1$
229:            }
230:
231:            /*
232:             * (non-Javadoc)
233:             * 
234:             * @see de.intarsys.pdf.cos.ICOSContainer#containable(de.intarsys.pdf.cos.COSObject)
235:             */
236:            public COSDocumentElement containable(COSObject object) {
237:                return object;
238:            }
239:
240:            /*
241:             * (non-Javadoc)
242:             * 
243:             * @see de.intarsys.pdf.cos.COSObject#copyDeep()
244:             */
245:            public final COSObject copyDeep() {
246:                return copyDeep(new HashMap());
247:            }
248:
249:            /*
250:             * (non-Javadoc)
251:             * 
252:             * @see de.intarsys.pdf.cos.COSDocumentElement#copyDeep(java.util.Map)
253:             */
254:            public COSObject copyDeep(Map copied) {
255:                COSObject result = copyBasic();
256:                if (isIndirect()) {
257:                    result.beIndirect();
258:                    copied.put(getIndirectObject(), result);
259:                }
260:                return result;
261:            }
262:
263:            /*
264:             * (non-Javadoc)
265:             * 
266:             * @see de.intarsys.pdf.cos.ICOSContainer#register(de.intarsys.pdf.cos.COSObject)
267:             */
268:            public void register(COSDocumentElement object) {
269:                COSDocument doc = getDoc();
270:                if (doc != null) {
271:                    object.registerWith(doc);
272:                }
273:            }
274:
275:            /*
276:             * (non-Javadoc)
277:             * 
278:             * @see de.intarsys.pdf.cos.COSObject#registerWith(de.intarsys.pdf.cos.COSDocument)
279:             */
280:            protected void registerWith(COSDocument doc) {
281:                // register descendents
282:                for (Iterator i = basicIterator(); i.hasNext();) {
283:                    COSDocumentElement element = (COSDocumentElement) i.next();
284:                    element.registerWith(doc);
285:                }
286:            }
287:
288:            /*
289:             * reference count from non indirect references is always 1
290:             * 
291:             * @see de.intarsys.pdf.cos.ICOSContainer#referenceCount()
292:             */
293:            public int referenceCount() {
294:                return 1;
295:            }
296:
297:            /*
298:             * (non-Javadoc)
299:             * 
300:             * @see de.intarsys.pdf.cos.ICOSContainer#saveStateContainer()
301:             */
302:            public ICOSContainer saveStateContainer() {
303:                return this ;
304:            }
305:
306:            /*
307:             * (non-Javadoc)
308:             * 
309:             * @see de.intarsys.pdf.cos.ICOSContainer#restoreStateContainer(de.intarsys.pdf.cos.ICOSContainer)
310:             */
311:            public ICOSContainer restoreStateContainer(ICOSContainer pContainer) {
312:                return pContainer;
313:            }
314:
315:            protected void triggerChanged(Object slot, Object oldValue,
316:                    Object newValue) {
317:                if (objectListeners == null) {
318:                    return;
319:                }
320:                for (Iterator it = objectListeners.iterator(); it.hasNext();) {
321:                    ICOSObjectListener listener = (ICOSObjectListener) it
322:                            .next();
323:                    listener.changed(this, slot, oldValue, newValue);
324:                }
325:            }
326:        }
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