Source Code Cross Referenced for DocumentImpl.java in  » XML » saxonb » net » sf » saxon » tree » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » saxonb » net.sf.saxon.tree 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package net.sf.saxon.tree;
002:
003:        import net.sf.saxon.Configuration;
004:        import net.sf.saxon.event.Receiver;
005:        import net.sf.saxon.om.*;
006:        import net.sf.saxon.trans.XPathException;
007:        import net.sf.saxon.type.Type;
008:
009:        import java.util.ArrayList;
010:        import java.util.HashMap;
011:
012:        /**
013:         * A node in the XML parse tree representing the Document itself (or equivalently, the root
014:         * node of the Document).<P>
015:         * @author Michael H. Kay
016:         */
017:
018:        public final class DocumentImpl extends ParentNodeImpl implements 
019:                DocumentInfo {
020:
021:            //private static int nextDocumentNumber = 0;
022:
023:            private ElementImpl documentElement;
024:
025:            private HashMap idTable = null;
026:            private int documentNumber;
027:            private HashMap entityTable = null;
028:            private HashMap elementList = null;
029:            //private StringBuffer characterBuffer;
030:            private Configuration config;
031:            private LineNumberMap lineNumberMap;
032:            private SystemIdMap systemIdMap = new SystemIdMap();
033:
034:            public DocumentImpl() {
035:                parent = null;
036:            }
037:
038:            /**
039:             * Set the Configuration that contains this document
040:             */
041:
042:            public void setConfiguration(Configuration config) {
043:                this .config = config;
044:                documentNumber = config.getDocumentNumberAllocator()
045:                        .allocateDocumentNumber();
046:            }
047:
048:            /**
049:             * Get the configuration previously set using setConfiguration
050:             */
051:
052:            public Configuration getConfiguration() {
053:                return config;
054:            }
055:
056:            /**
057:             * Get the name pool used for the names in this document
058:             */
059:
060:            public NamePool getNamePool() {
061:                return config.getNamePool();
062:            }
063:
064:            /**
065:             * Get the unique document number
066:             */
067:
068:            public int getDocumentNumber() {
069:                return documentNumber;
070:            }
071:
072:            /**
073:             * Set the top-level element of the document (variously called the root element or the
074:             * document element). Note that a DocumentImpl may represent the root of a result tree
075:             * fragment, in which case there is no document element.
076:             * @param e the top-level element
077:             */
078:
079:            void setDocumentElement(ElementImpl e) {
080:                documentElement = e;
081:            }
082:
083:            /**
084:             * Set the system id of this node
085:             */
086:
087:            public void setSystemId(String uri) {
088:                if (uri == null) {
089:                    uri = "";
090:                }
091:                systemIdMap.setSystemId(sequence, uri);
092:            }
093:
094:            /**
095:             * Get the system id of this root node
096:             */
097:
098:            public String getSystemId() {
099:                return systemIdMap.getSystemId(sequence);
100:            }
101:
102:            /**
103:             * Get the base URI of this root node. For a root node the base URI is the same as the
104:             * System ID.
105:             */
106:
107:            public String getBaseURI() {
108:                return getSystemId();
109:            }
110:
111:            /**
112:             * Set the system id of an element in the document
113:             */
114:
115:            void setSystemId(int seq, String uri) {
116:                if (uri == null) {
117:                    uri = "";
118:                }
119:                systemIdMap.setSystemId(seq, uri);
120:            }
121:
122:            /**
123:             * Get the system id of an element in the document
124:             */
125:
126:            String getSystemId(int seq) {
127:                return systemIdMap.getSystemId(seq);
128:            }
129:
130:            /**
131:             * Set line numbering on
132:             */
133:
134:            public void setLineNumbering() {
135:                lineNumberMap = new LineNumberMap();
136:                lineNumberMap.setLineNumber(sequence, 0);
137:            }
138:
139:            /**
140:             * Set the line number for an element. Ignored if line numbering is off.
141:             */
142:
143:            void setLineNumber(int sequence, int line) {
144:                if (lineNumberMap != null) {
145:                    lineNumberMap.setLineNumber(sequence, line);
146:                }
147:            }
148:
149:            /**
150:             * Get the line number for an element. Return -1 if line numbering is off.
151:             */
152:
153:            int getLineNumber(int sequence) {
154:                if (lineNumberMap != null) {
155:                    return lineNumberMap.getLineNumber(sequence);
156:                }
157:                return -1;
158:            }
159:
160:            /**
161:             * Get the line number of this root node.
162:             * @return 0 always
163:             */
164:
165:            public int getLineNumber() {
166:                return 0;
167:            }
168:
169:            /**
170:             * Return the type of node.
171:             * @return Type.DOCUMENT (always)
172:             */
173:
174:            public final int getNodeKind() {
175:                return Type.DOCUMENT;
176:            }
177:
178:            /**
179:             * Get next sibling - always null
180:             * @return null
181:             */
182:
183:            public final NodeInfo getNextSibling() {
184:                return null;
185:            }
186:
187:            /**
188:             * Get previous sibling - always null
189:             * @return null
190:             */
191:
192:            public final NodeInfo getPreviousSibling() {
193:                return null;
194:            }
195:
196:            /**
197:             * Get the root (outermost) element.
198:             * @return the Element node for the outermost element of the document.
199:             */
200:
201:            public ElementImpl getDocumentElement() {
202:                return documentElement;
203:            }
204:
205:            /**
206:             * Get the root node
207:             * @return the NodeInfo representing the root of this tree
208:             */
209:
210:            public NodeInfo getRoot() {
211:                return this ;
212:            }
213:
214:            /**
215:             * Get the root (document) node
216:             * @return the DocumentInfo representing this document
217:             */
218:
219:            public DocumentInfo getDocumentRoot() {
220:                return this ;
221:            }
222:
223:            /**
224:             * Get a character string that uniquely identifies this node
225:             * @return a string based on the document number
226:             */
227:
228:            public String generateId() {
229:                return "d" + documentNumber;
230:            }
231:
232:            /**
233:             * Get a list of all elements with a given name fingerprint
234:             */
235:
236:            AxisIterator getAllElements(int fingerprint) {
237:                Integer elkey = new Integer(fingerprint);
238:                if (elementList == null) {
239:                    elementList = new HashMap(500);
240:                }
241:                ArrayList list = (ArrayList) elementList.get(elkey);
242:                if (list == null) {
243:                    list = new ArrayList(500);
244:                    NodeImpl next = getNextInDocument(this );
245:                    while (next != null) {
246:                        if (next.getNodeKind() == Type.ELEMENT
247:                                && next.getFingerprint() == fingerprint) {
248:                            list.add(next);
249:                        }
250:                        next = next.getNextInDocument(this );
251:                    }
252:                    elementList.put(elkey, list);
253:                }
254:                return new ListIterator(list);
255:            }
256:
257:            /**
258:             * Index all the ID attributes. This is done the first time the id() function
259:             * is used on this document
260:             */
261:
262:            private void indexIDs() {
263:                if (idTable != null)
264:                    return; // ID's are already indexed
265:                idTable = new HashMap(256);
266:                NameChecker checker = getConfiguration().getNameChecker();
267:
268:                NodeImpl curr = this ;
269:                NodeImpl root = curr;
270:                while (curr != null) {
271:                    if (curr.getNodeKind() == Type.ELEMENT) {
272:                        ElementImpl e = (ElementImpl) curr;
273:                        AttributeCollection atts = e.getAttributeList();
274:                        for (int i = 0; i < atts.getLength(); i++) {
275:                            if (atts.isId(i)
276:                                    && checker.isValidNCName(atts.getValue(i)
277:                                            .trim())) {
278:                                // don't index any invalid IDs - these can arise when using a non-validating parser
279:                                registerID(e, atts.getValue(i).trim());
280:                            }
281:                        }
282:                    }
283:                    curr = curr.getNextInDocument(root);
284:                }
285:            }
286:
287:            /**
288:             * Register a unique element ID. Fails if there is already an element with that ID.
289:             * @param e The Element having a particular unique ID value
290:             * @param id The unique ID value
291:             */
292:
293:            private void registerID(NodeInfo e, String id) {
294:                // the XPath spec (5.2.1) says ignore the second ID if it's not unique
295:                Object old = idTable.get(id);
296:                if (old == null) {
297:                    idTable.put(id, e);
298:                }
299:
300:            }
301:
302:            /**
303:             * Get the element with a given ID.
304:             * @param id The unique ID of the required element, previously registered using registerID()
305:             * @return The NodeInfo for the given ID if one has been registered, otherwise null.
306:             */
307:
308:            public NodeInfo selectID(String id) {
309:                if (idTable == null)
310:                    indexIDs();
311:                return (NodeInfo) idTable.get(id);
312:            }
313:
314:            /**
315:             * Set an unparsed entity URI associated with this document. For system use only, while
316:             * building the document.
317:             */
318:
319:            void setUnparsedEntity(String name, String uri, String publicId) {
320:                // System.err.println("setUnparsedEntity( " + name + "," + uri + ")");
321:                if (entityTable == null) {
322:                    entityTable = new HashMap(10);
323:                }
324:                String[] ids = new String[2];
325:                ids[0] = uri;
326:                ids[1] = publicId;
327:                entityTable.put(name, ids);
328:            }
329:
330:            /**
331:             * Get the unparsed entity with a given name
332:             * @param name the name of the entity
333:             * @return if the entity exists, return an array of two Strings, the first holding the system ID
334:             * of the entity, the second holding the public ID if there is one, or null if not. If the entity
335:             * does not exist, return null.    * @return the URI of the entity if there is one, or empty string if not
336:             */
337:
338:            public String[] getUnparsedEntity(String name) {
339:                if (entityTable == null) {
340:                    return null;
341:                }
342:                return (String[]) entityTable.get(name);
343:            }
344:
345:            /**
346:             * Copy this node to a given outputter
347:             */
348:
349:            public void copy(Receiver out, int whichNamespaces,
350:                    boolean copyAnnotations, int locationId)
351:                    throws XPathException {
352:                out.startDocument(0);
353:                NodeImpl next = (NodeImpl) getFirstChild();
354:                while (next != null) {
355:                    next
356:                            .copy(out, whichNamespaces, copyAnnotations,
357:                                    locationId);
358:                    next = (NodeImpl) next.getNextSibling();
359:                }
360:                out.endDocument();
361:            }
362:
363:        }
364:
365:        //
366:        // The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
367:        // you may not use this file except in compliance with the License. You may obtain a copy of the
368:        // License at http://www.mozilla.org/MPL/
369:        //
370:        // Software distributed under the License is distributed on an "AS IS" basis,
371:        // WITHOUT WARRANTY OF ANY KIND, either express or implied.
372:        // See the License for the specific language governing rights and limitations under the License.
373:        //
374:        // The Original Code is: all this file
375:        //
376:        // The Initial Developer of the Original Code is Michael H. Kay.
377:        //
378:        // Contributor(s):
379:        //
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