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

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


001:        package net.sf.saxon.dom;
002:
003:        import net.sf.saxon.om.*;
004:        import net.sf.saxon.pattern.NameTest;
005:        import net.sf.saxon.type.Type;
006:        import org.w3c.dom.*;
007:
008:        /**
009:         * This class is an implementation of the DOM Element class that wraps a Saxon NodeInfo
010:         * representation of an element node.
011:         */
012:
013:        public class ElementOverNodeInfo extends NodeOverNodeInfo implements 
014:                Element {
015:
016:            /**
017:             *  The name of the element (DOM interface).
018:             */
019:
020:            public String getTagName() {
021:                return node.getDisplayName();
022:            }
023:
024:            /**
025:             * Returns a <code>NodeList</code> of all descendant <code>Elements</code>
026:             * with a given tag name, in document order.
027:             *
028:             * @param name The name of the tag to match on. The special value "*"
029:             *             matches all tags.
030:             * @return A list of matching <code>Element</code> nodes.
031:             */
032:            public NodeList getElementsByTagName(String name) {
033:                return DocumentOverNodeInfo.getElementsByTagName(node, name);
034:            }
035:
036:            /**
037:             * Returns a <code>NodeList</code> of all the descendant
038:             * <code>Elements</code> with a given local name and namespace URI in
039:             * document order.
040:             *
041:             * @param namespaceURI The namespace URI of the elements to match on. The
042:             *                     special value "*" matches all namespaces.
043:             * @param localName    The local name of the elements to match on. The
044:             *                     special value "*" matches all local names.
045:             * @return A new <code>NodeList</code> object containing all the matched
046:             *         <code>Elements</code>.
047:             * @throws org.w3c.dom.DOMException NOT_SUPPORTED_ERR: May be raised if the implementation does not
048:             *                                  support the feature <code>"XML"</code> and the language exposed
049:             *                                  through the Document does not support XML Namespaces (such as [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]).
050:             * @since DOM Level 2
051:             */
052:            public NodeList getElementsByTagNameNS(String namespaceURI,
053:                    String localName) throws DOMException {
054:                return DocumentOverNodeInfo.getElementsByTagNameNS(node,
055:                        namespaceURI, localName);
056:            }
057:
058:            /**
059:             * Retrieves an attribute value by name. Namespace declarations will not
060:             * be retrieved. DOM interface.
061:             * @param name  The QName of the attribute to retrieve.
062:             * @return  The <code>Attr</code> value as a string, or the empty string if
063:             *    that attribute does not have a specified or default value.
064:             */
065:
066:            public String getAttribute(String name) {
067:                AxisIterator atts = node.iterateAxis(Axis.ATTRIBUTE);
068:                while (true) {
069:                    NodeInfo att = (NodeInfo) atts.next();
070:                    if (att == null) {
071:                        return "";
072:                    }
073:                    if (att.getDisplayName().equals(name)) {
074:                        String val = att.getStringValue();
075:                        if (val == null)
076:                            return "";
077:                        return val;
078:                    }
079:                }
080:            }
081:
082:            /**
083:             * Retrieves an attribute node by name.
084:             * Namespace declarations will not be retrieved.
085:             * <br> To retrieve an attribute node by qualified name and namespace URI,
086:             * use the <code>getAttributeNodeNS</code> method.
087:             * @param name  The name (<code>nodeName</code> ) of the attribute to
088:             *   retrieve.
089:             * @return  The <code>Attr</code> node with the specified name (
090:             *   <code>nodeName</code> ) or <code>null</code> if there is no such
091:             *   attribute.
092:             */
093:
094:            public Attr getAttributeNode(String name) {
095:                AxisIterator atts = node.iterateAxis(Axis.ATTRIBUTE);
096:                while (true) {
097:                    NodeInfo att = (NodeInfo) atts.next();
098:                    if (att == null) {
099:                        return null;
100:                    }
101:                    if (att.getDisplayName().equals(name)) {
102:                        return (Attr) att;
103:                    }
104:                }
105:            }
106:
107:            /**
108:             * Adds a new attribute node. Always fails
109:             * @exception org.w3c.dom.DOMException
110:             *    NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
111:             */
112:
113:            public Attr setAttributeNode(Attr newAttr) throws DOMException {
114:                disallowUpdate();
115:                return null;
116:            }
117:
118:            /**
119:             * Removes the specified attribute. Always fails
120:             * @exception org.w3c.dom.DOMException
121:             *    NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
122:             */
123:
124:            public void removeAttribute(String oldAttr) throws DOMException {
125:                disallowUpdate();
126:            }
127:
128:            /**
129:             * Removes the specified attribute node. Always fails
130:             * @exception org.w3c.dom.DOMException
131:             *    NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
132:             */
133:
134:            public Attr removeAttributeNode(Attr oldAttr) throws DOMException {
135:                disallowUpdate();
136:                return null;
137:            }
138:
139:            /**
140:             * Retrieves an attribute value by local name and namespace URI.
141:             * HTML-only DOM implementations do not need to implement this method.
142:             * @param namespaceURI  The  namespace URI of the attribute to retrieve.
143:             * @param localName  The  local name of the attribute to retrieve.
144:             * @return  The <code>Attr</code> value as a string, or the empty string if
145:             *    that attribute does not have a specified or default value.
146:             * @since DOM Level 2
147:             */
148:
149:            public String getAttributeNS(String namespaceURI, String localName) {
150:                String val = Navigator.getAttributeValue(node, namespaceURI,
151:                        localName);
152:                if (val == null)
153:                    return "";
154:                return val;
155:            }
156:
157:            /**
158:             * Adds a new attribute. Always fails
159:             *
160:             * @param name  The name of the attribute to create or alter.
161:             * @param value Value to set in string form.
162:             * @throws org.w3c.dom.DOMException INVALID_CHARACTER_ERR: Raised if the specified name is not an XML
163:             *                                  name according to the XML version in use specified in the
164:             *                                  <code>Document.xmlVersion</code> attribute.
165:             *                                  <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
166:             */
167:            public void setAttribute(String name, String value)
168:                    throws DOMException {
169:                disallowUpdate();
170:            }
171:
172:            /**
173:             * Adds a new attribute. Always fails.
174:             * @param namespaceURI  The  namespace URI of the attribute to create or
175:             *   alter.
176:             * @param qualifiedName  The  qualified name of the attribute to create or
177:             *   alter.
178:             * @param value  The value to set in string form.
179:             * @exception org.w3c.dom.DOMException
180:             *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
181:             */
182:
183:            public void setAttributeNS(String namespaceURI,
184:                    String qualifiedName, String value) throws DOMException {
185:                disallowUpdate();
186:            }
187:
188:            /**
189:             * Removes an attribute by local name and namespace URI. Always fails
190:             * @exception org.w3c.dom.DOMException
191:             *    NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
192:             * @since DOM Level 2
193:             */
194:
195:            public void removeAttributeNS(String namespaceURI, String localName)
196:                    throws DOMException {
197:                disallowUpdate();
198:            }
199:
200:            /**
201:             * Retrieves an <code>Attr</code> node by local name and namespace URI.
202:             * DOM method, so namespace declarations count as attributes.
203:             * @param namespaceURI  The  namespace URI of the attribute to retrieve.
204:             * @param localName  The  local name of the attribute to retrieve.
205:             * @return  The <code>Attr</code> node with the specified attribute local
206:             *   name and namespace URI or <code>null</code> if there is no such
207:             *   attribute.
208:             * @since DOM Level 2
209:             */
210:
211:            public Attr getAttributeNodeNS(String namespaceURI, String localName) {
212:                DocumentInfo doc = node.getDocumentRoot();
213:                if (doc == null) {
214:                    throw new UnsupportedOperationException(
215:                            "getAttributeNodeNS is not supported on a tree with no document node");
216:                }
217:                int fingerprint = doc.getNamePool().getFingerprint(
218:                        namespaceURI, localName);
219:                if (fingerprint == -1)
220:                    return null;
221:                NameTest test = new NameTest(Type.ATTRIBUTE, fingerprint, node
222:                        .getNamePool());
223:                AxisIterator atts = node.iterateAxis(Axis.ATTRIBUTE, test);
224:                return (Attr) wrap((NodeInfo) atts.next());
225:            }
226:
227:            /**
228:             * Add a new attribute. Always fails.
229:             * @param newAttr  The <code>Attr</code> node to add to the attribute list.
230:             * @return  If the <code>newAttr</code> attribute replaces an existing
231:             *   attribute with the same  local name and  namespace URI , the
232:             *   replaced <code>Attr</code> node is returned, otherwise
233:             *   <code>null</code> is returned.
234:             * @exception org.w3c.dom.DOMException
235:             *   <br> NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
236:             * @since DOM Level 2
237:             */
238:
239:            public Attr setAttributeNodeNS(Attr newAttr) throws DOMException {
240:                disallowUpdate();
241:                return null;
242:            }
243:
244:            /**
245:             * Returns <code>true</code> when an attribute with a given name is
246:             * specified on this element or has a default value, <code>false</code>
247:             * otherwise.
248:             * Namespace declarations will not be retrieved.
249:             * @param name  The name of the attribute to look for.
250:             * @return <code>true</code> if an attribute with the given name is
251:             *   specified on this element or has a default value, <code>false</code>
252:             *   otherwise.
253:             * @since DOM Level 2
254:             */
255:
256:            public boolean hasAttribute(String name) {
257:                AxisIterator atts = node.iterateAxis(Axis.ATTRIBUTE);
258:                while (true) {
259:                    NodeInfo att = (NodeInfo) atts.next();
260:                    if (att == null) {
261:                        return false;
262:                    }
263:                    if (att.getDisplayName().equals(name)) {
264:                        return true;
265:                    }
266:                }
267:            }
268:
269:            /**
270:             * Returns <code>true</code> when an attribute with a given local name
271:             * and namespace URI is specified on this element or has a default value,
272:             * <code>false</code> otherwise.
273:             * Namespace declarations will not be retrieved.
274:             * @param namespaceURI  The  namespace URI of the attribute to look for.
275:             * @param localName  The  local name of the attribute to look for.
276:             * @return <code>true</code> if an attribute with the given local name and
277:             *   namespace URI is specified or has a default value on this element,
278:             *   <code>false</code> otherwise.
279:             * @since DOM Level 2
280:             */
281:
282:            public boolean hasAttributeNS(String namespaceURI, String localName) {
283:                return (Navigator.getAttributeValue(node, namespaceURI,
284:                        localName) != null);
285:            }
286:
287:            // DOM Level 3 methods
288:
289:            public void setIdAttribute(String name, boolean isId)
290:                    throws DOMException {
291:                disallowUpdate();
292:            }
293:
294:            public void setIdAttributeNS(String namespaceURI, String localName,
295:                    boolean isId) throws DOMException {
296:                disallowUpdate();
297:            }
298:
299:            public void setIdAttributeNode(Attr idAttr, boolean isId)
300:                    throws DOMException {
301:                disallowUpdate();
302:            }
303:
304:            /**
305:             * Get the schema type information for this node. Returns null for an untyped node.
306:             */
307:
308:            public TypeInfo getSchemaTypeInfo() {
309:                int annotation = node.getTypeAnnotation();
310:                if (annotation == -1) {
311:                    return null;
312:                }
313:                return new TypeInfoImpl(node.getConfiguration(), node
314:                        .getConfiguration().getSchemaType(annotation));
315:            }
316:
317:        }
318:
319:        //
320:        // The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
321:        // you may not use this file except in compliance with the License. You may obtain a copy of the
322:        // License at http://www.mozilla.org/MPL/
323:        //
324:        // Software distributed under the License is distributed on an "AS IS" basis,
325:        // WITHOUT WARRANTY OF ANY KIND, either express or implied.
326:        // See the License for the specific language governing rights and limitations under the License.
327:        //
328:        // The Original Code is: all this file.
329:        //
330:        // The Initial Developer of the Original Code is Michael H. Kay.
331:        //
332:        // Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
333:        //
334:        // Contributor(s): none.
335:        //
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