Source Code Cross Referenced for ElementImpl.java in  » XML » XPath-Saxon » net » sf » saxon » tree » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » XPath Saxon » 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.event.LocationCopier;
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:        /**
010:         * ElementImpl implements an element with no attributes or namespace declarations.<P>
011:         * This class is an implementation of NodeInfo. For elements with attributes or
012:         * namespace declarations, class ElementWithAttributes is used.
013:         * @author Michael H. Kay
014:         */
015:
016:        public class ElementImpl extends ParentNodeImpl {
017:
018:            private static final AttributeCollectionImpl emptyAtts = new AttributeCollectionImpl(
019:                    null);
020:
021:            protected int nameCode;
022:            protected DocumentImpl root;
023:
024:            /**
025:             * Construct an empty ElementImpl
026:             */
027:
028:            public ElementImpl() {
029:            }
030:
031:            /**
032:             * Set the name code. Used when creating a dummy element in the Stripper
033:             */
034:
035:            public void setNameCode(int nameCode) {
036:                this .nameCode = nameCode;
037:            }
038:
039:            /**
040:             * Initialise a new ElementImpl with an element name
041:             * @param nameCode  Integer representing the element name, with namespaces resolved
042:             * @param atts The attribute list: always null
043:             * @param parent  The parent node
044:             * @param baseURI  The base URI of the new element
045:             * @param lineNumber  The line number of the element in the source document
046:             * @param sequenceNumber  Integer identifying this element within the document
047:             */
048:
049:            public void initialise(int nameCode, AttributeCollectionImpl atts,
050:                    NodeInfo parent, String baseURI, int lineNumber,
051:                    int sequenceNumber) {
052:                this .nameCode = nameCode;
053:                this .parent = (ParentNodeImpl) parent;
054:                this .sequence = sequenceNumber;
055:                this .root = (DocumentImpl) parent.getDocumentRoot();
056:                root.setLineNumber(sequenceNumber, lineNumber);
057:                root.setSystemId(sequenceNumber, baseURI);
058:            }
059:
060:            /**
061:             * Set the system ID of this node. This method is provided so that a NodeInfo
062:             * implements the javax.xml.transform.Source interface, allowing a node to be
063:             * used directly as the Source of a transformation
064:             */
065:
066:            public void setSystemId(String uri) {
067:                root.setSystemId(sequence, uri);
068:            }
069:
070:            /**
071:             * Get the root node
072:             */
073:
074:            public NodeInfo getRoot() {
075:                return root;
076:            }
077:
078:            /**
079:             * Get the root document node
080:             */
081:
082:            public DocumentInfo getDocumentRoot() {
083:                return root;
084:            }
085:
086:            /**
087:             * Get the system ID of the entity containing this element node.
088:             */
089:
090:            public final String getSystemId() {
091:                return ((DocumentImpl) getDocumentRoot()).getSystemId(sequence);
092:            }
093:
094:            /**
095:             * Get the base URI of this element node. This will be the same as the System ID unless
096:             * xml:base has been used.
097:             */
098:
099:            public String getBaseURI() {
100:                return Navigator.getBaseURI(this );
101:            }
102:
103:            /**
104:             * Set the line number of the element within its source document entity
105:             */
106:
107:            public void setLineNumber(int line) {
108:                ((DocumentImpl) getDocumentRoot())
109:                        .setLineNumber(sequence, line);
110:            }
111:
112:            /**
113:             * Get the line number of the node within its source document entity
114:             */
115:
116:            public int getLineNumber() {
117:                return ((DocumentImpl) getDocumentRoot())
118:                        .getLineNumber(sequence);
119:            }
120:
121:            /**
122:             * Get the nameCode of the node. This is used to locate the name in the NamePool
123:             */
124:
125:            public int getNameCode() {
126:                return nameCode;
127:            }
128:
129:            /**
130:             * Get a character string that uniquely identifies this node
131:             * @return a string.
132:             */
133:
134:            public String generateId() {
135:                return getDocumentRoot().generateId() + 'e' + sequence;
136:            }
137:
138:            /**
139:             * Output all namespace nodes associated with this element.
140:             * @param out The relevant outputter
141:             */
142:
143:            public void sendNamespaceDeclarations(Receiver out,
144:                    boolean includeAncestors) throws XPathException {
145:
146:                // just add the namespaces defined on the ancestor nodes. We rely on the outputter
147:                // to eliminate multiple declarations of the same prefix
148:
149:                if (includeAncestors) {
150:                    if (!(parent instanceof  DocumentInfo)) {
151:                        parent.sendNamespaceDeclarations(out, true);
152:                    }
153:                }
154:            }
155:
156:            /**
157:             * Get all namespace undeclarations and undeclarations defined on this element.
158:             *
159:             * @param buffer If this is non-null, and the result array fits in this buffer, then the result
160:             *               may overwrite the contents of this array, to avoid the cost of allocating a new array on the heap.
161:             * @return An array of integers representing the namespace declarations and undeclarations present on
162:             *         this element. For a node other than an element, return null. Otherwise, the returned array is a
163:             *         sequence of namespace codes, whose meaning may be interpreted by reference to the name pool. The
164:             *         top half word of each namespace code represents the prefix, the bottom half represents the URI.
165:             *         If the bottom half is zero, then this is a namespace undeclaration rather than a declaration.
166:             *         The XML namespace is never included in the list. If the supplied array is larger than required,
167:             *         then the first unused entry will be set to -1.
168:             *         <p/>
169:             *         <p>For a node other than an element, the method returns null.</p>
170:             */
171:
172:            public int[] getDeclaredNamespaces(int[] buffer) {
173:                return EMPTY_NAMESPACE_LIST;
174:            }
175:
176:            /**
177:             * Return the type of node.
178:             * @return Type.ELEMENT
179:             */
180:
181:            public final int getNodeKind() {
182:                return Type.ELEMENT;
183:            }
184:
185:            /**
186:             * Get the attribute list for this element.
187:             * @return The attribute list. This will not include any
188:             * namespace attributes. The attribute names will be in expanded form, with prefixes
189:             * replaced by URIs
190:             */
191:
192:            public AttributeCollection getAttributeList() {
193:                return emptyAtts;
194:            }
195:
196:            /**
197:             *  Find the value of a given attribute of this element. <BR>
198:             *  This is a short-cut method; the full capability to examine
199:             *  attributes is offered via the getAttributeList() method. <BR>
200:             *  The attribute may either be one that was present in the original XML document,
201:             *  or one that has been set by the application using setAttribute(). <BR>
202:             *  @param name the name of an attribute. There must be no prefix in the name.
203:             *  @return the value of the attribute, if it exists, otherwise null
204:             */
205:
206:            //    public String getAttributeValue( String name ) {
207:            //        return null;
208:            //    }
209:
210:            /**
211:             * Copy this node to a given outputter (supporting xsl:copy-of)
212:             * @param out The outputter
213:             * @param whichNamespaces indicates which namespaces should be output: all, none, or local
214:             * namespaces only (those not declared on the parent element)
215:             */
216:
217:            public void copy(Receiver out, int whichNamespaces,
218:                    boolean copyAnnotations, int locationId)
219:                    throws XPathException {
220:
221:                int typeCode = (copyAnnotations ? getTypeAnnotation() : -1);
222:                if (locationId == 0 && out instanceof  LocationCopier) {
223:                    out.setSystemId(getSystemId());
224:                    ((LocationCopier) out).setLineNumber(getLineNumber());
225:                }
226:                out.startElement(getNameCode(), typeCode, locationId, 0);
227:
228:                // output the namespaces
229:
230:                if (whichNamespaces != NO_NAMESPACES) {
231:                    sendNamespaceDeclarations(out,
232:                            whichNamespaces == ALL_NAMESPACES);
233:                }
234:
235:                // output the children
236:
237:                int childNamespaces = (whichNamespaces == NO_NAMESPACES ? NO_NAMESPACES
238:                        : LOCAL_NAMESPACES);
239:                NodeImpl next = (NodeImpl) getFirstChild();
240:                while (next != null) {
241:                    next
242:                            .copy(out, childNamespaces, copyAnnotations,
243:                                    locationId);
244:                    next = (NodeImpl) next.getNextSibling();
245:                }
246:
247:                out.endElement();
248:            }
249:
250:        }
251:
252:        //
253:        // The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
254:        // you may not use this file except in compliance with the License. You may obtain a copy of the
255:        // License at http://www.mozilla.org/MPL/
256:        //
257:        // Software distributed under the License is distributed on an "AS IS" basis,
258:        // WITHOUT WARRANTY OF ANY KIND, either express or implied.
259:        // See the License for the specific language governing rights and limitations under the License.
260:        //
261:        // The Original Code is: all this file.
262:        //
263:        // The Initial Developer of the Original Code is Michael H. Kay.
264:        //
265:        // Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
266:        //
267:        // Contributor(s): none.
268:        //
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