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

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


001:        package net.sf.saxon.pattern;
002:
003:        import net.sf.saxon.om.NamePool;
004:        import net.sf.saxon.om.NodeInfo;
005:        import net.sf.saxon.tinytree.TinyTree;
006:
007:        /**
008:         * NodeTest is an interface that enables a test of whether a node has a particular
009:         * name and type. A LocalNameTest matches the node type and the local name,
010:         * it represents an XPath 2.0 test of the form *:name.
011:         *
012:         * @author Michael H. Kay
013:         */
014:
015:        public final class LocalNameTest extends NodeTest {
016:
017:            private NamePool namePool;
018:            private int nodeKind;
019:            private String localName;
020:
021:            public LocalNameTest(NamePool pool, int nodeType, String localName) {
022:                namePool = pool;
023:                nodeKind = nodeType;
024:                this .localName = localName;
025:            }
026:
027:            /**
028:             * Test whether this node test is satisfied by a given node
029:             * @param nodeType The type of node to be matched
030:             * @param fingerprint identifies the expanded name of the node to be matched
031:             */
032:
033:            public boolean matches(int nodeType, int fingerprint, int annotation) {
034:                if (fingerprint == -1)
035:                    return false;
036:                if (nodeType != nodeKind)
037:                    return false;
038:                return localName.equals(namePool.getLocalName(fingerprint));
039:            }
040:
041:            /**
042:             * Test whether this node test is satisfied by a given node on a TinyTree. The node
043:             * must be a document, element, text, comment, or processing instruction node.
044:             * This method is provided so that when navigating a TinyTree a node can be rejected without
045:             * actually instantiating a NodeInfo object.
046:             *
047:             * @param tree   the TinyTree containing the node
048:             * @param nodeNr the number of the node within the TinyTree
049:             * @return true if the node matches the NodeTest, otherwise false
050:             */
051:
052:            public boolean matches(TinyTree tree, int nodeNr) {
053:                int fingerprint = tree.getNameCode(nodeNr) & NamePool.FP_MASK;
054:                if (fingerprint == -1)
055:                    return false;
056:                if (tree.getNodeKind(nodeNr) != nodeKind)
057:                    return false;
058:                return localName.equals(namePool.getLocalName(fingerprint));
059:            }
060:
061:            /**
062:             * Test whether this node test is satisfied by a given node. This alternative
063:             * method is used in the case of nodes where calculating the fingerprint is expensive,
064:             * for example DOM or JDOM nodes.
065:             * @param node the node to be matched
066:             */
067:
068:            public boolean matches(NodeInfo node) {
069:                return localName.equals(node.getLocalPart());
070:            }
071:
072:            /**
073:             * Determine the default priority of this node test when used on its own as a Pattern
074:             */
075:
076:            public final double getDefaultPriority() {
077:                return -0.25;
078:            }
079:
080:            /**
081:             * Determine the types of nodes to which this pattern applies. Used for optimisation.
082:             * For patterns that match nodes of several types, return Type.NODE
083:             * @return the type of node matched by this pattern. e.g. Type.ELEMENT or Type.TEXT
084:             */
085:
086:            public int getPrimitiveType() {
087:                return nodeKind;
088:            }
089:
090:            /**
091:             * Get a mask indicating which kinds of nodes this NodeTest can match. This is a combination
092:             * of bits: 1<<Type.ELEMENT for element nodes, 1<<Type.TEXT for text nodes, and so on.
093:             */
094:
095:            public int getNodeKindMask() {
096:                return 1 << nodeKind;
097:            }
098:
099:            public String toString() {
100:                return "*:" + localName;
101:            }
102:
103:            /**
104:             * Returns a hash code value for the object.
105:             */
106:
107:            public int hashCode() {
108:                return nodeKind << 20 ^ localName.hashCode();
109:            }
110:
111:            /**
112:             * Indicates whether some other object is "equal to" this one.
113:             */
114:            public boolean equals(Object other) {
115:                return other instanceof  LocalNameTest
116:                        && ((LocalNameTest) other).namePool == namePool
117:                        && ((LocalNameTest) other).nodeKind == nodeKind
118:                        && ((LocalNameTest) other).localName.equals(localName);
119:            }
120:
121:        }
122:
123:        //
124:        // The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
125:        // you may not use this file except in compliance with the License. You may obtain a copy of the
126:        // License at http://www.mozilla.org/MPL/
127:        //
128:        // Software distributed under the License is distributed on an "AS IS" basis,
129:        // WITHOUT WARRANTY OF ANY KIND, either express or implied.
130:        // See the License for the specific language governing rights and limitations under the License.
131:        //
132:        // The Original Code is: all this file.
133:        //
134:        // The Initial Developer of the Original Code is Michael H. Kay.
135:        //
136:        // Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
137:        //
138:        // Contributor(s): none.
139:        //
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