Source Code Cross Referenced for NodeTestPattern.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.expr.XPathContext;
004:        import net.sf.saxon.om.NodeInfo;
005:
006:        /**
007:         * A NodeTestPattern is a pattern that consists simply of a NodeTest.
008:         * @author Michael H. Kay
009:         */
010:
011:        public class NodeTestPattern extends Pattern {
012:
013:            private NodeTest nodeTest;
014:
015:            public NodeTestPattern() {
016:            }
017:
018:            public NodeTestPattern(NodeTest test) {
019:                nodeTest = test;
020:            }
021:
022:            public void setNodeTest(NodeTest test) {
023:                nodeTest = test;
024:            }
025:
026:            /**
027:             * Determine whether this Pattern matches the given Node. This is the main external interface
028:             * for matching patterns: it sets current() to the node being tested
029:             * @param node The NodeInfo representing the Element or other node to be tested against the Pattern
030:             * @param context The context in which the match is to take place. Only relevant if the pattern
031:             * uses variables, or contains calls on functions such as document() or key(). Not used (and can be
032:             * set to null) in the case of patterns that are NodeTests
033:             * @return true if the node matches the Pattern, false otherwise
034:             */
035:
036:            public boolean matches(NodeInfo node, XPathContext context) {
037:                return nodeTest.matches(node);
038:            }
039:
040:            /**
041:             * Get a NodeTest that all the nodes matching this pattern must satisfy
042:             */
043:
044:            public NodeTest getNodeTest() {
045:                return nodeTest;
046:            }
047:
048:            /**
049:             * Determine the default priority of this node test when used on its own as a Pattern
050:             */
051:
052:            public final double getDefaultPriority() {
053:                return nodeTest.getDefaultPriority();
054:            }
055:
056:            /**
057:             * Determine the types of nodes to which this pattern applies. Used for optimisation.
058:             * For patterns that match nodes of several types, return Type.NODE
059:             *
060:             * @return the type of node matched by this pattern. e.g. Type.ELEMENT or Type.TEXT
061:             */
062:
063:            public int getNodeKind() {
064:                return nodeTest.getPrimitiveType();
065:            }
066:
067:            /**
068:             * Determine the name fingerprint of nodes to which this pattern applies. Used for
069:             * optimisation.
070:             *
071:             * @return A fingerprint that the nodes must match, or -1 if it can match multiple fingerprints
072:             */
073:
074:            public int getFingerprint() {
075:                return nodeTest.getFingerprint();
076:            }
077:
078:            /**
079:             * Display the pattern for diagnostics
080:             */
081:
082:            public String toString() {
083:                return nodeTest.toString();
084:            }
085:
086:        }
087:
088:        //
089:        // The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
090:        // you may not use this file except in compliance with the License. You may obtain a copy of the
091:        // License at http://www.mozilla.org/MPL/
092:        //
093:        // Software distributed under the License is distributed on an "AS IS" basis,
094:        // WITHOUT WARRANTY OF ANY KIND, either express or implied.
095:        // See the License for the specific language governing rights and limitations under the License.
096:        //
097:        // The Original Code is: all this file.
098:        //
099:        // The Initial Developer of the Original Code is Michael H. Kay.
100:        //
101:        // Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
102:        //
103:        // Contributor(s): none.
104:        //
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