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1
9
10 package org.ozoneDB.xml.dom4j.xpath;
11
12 import org.dom4j.InvalidXPathException;
13 import org.dom4j.Node;
14 import org.dom4j.XPathException;
15 import org.jaxen.*;
16 import org.jaxen.dom4j.DocumentNavigator;
17 import org.jaxen.pattern.Pattern;
18 import org.jaxen.pattern.PatternParser;
19 import org.ozoneDB.OzoneInterface;
20 import org.ozoneDB.OzoneObject;
21
22 import java.util.ArrayList  ;
23
24
31 public class XPathPatternImpl extends OzoneObject implements XPathPattern {
32
33 final static long serialVersionUID = 1L;
34
35 private String text;
36 private Pattern pattern;
37 private Context context;
38
39 public static XPathPattern create(OzoneInterface db, Pattern pattern) {
40 final Class [] signature = new Class [] {Pattern.class};
41 return (XPathPattern) db.createObject(XPathPatternImpl.class,
42 signature,
43 new Object []{pattern}
44 );
45
46 }
47
48 public XPathPatternImpl(Pattern pattern) {
49 this.pattern = pattern;
50 this.text = pattern.getText();
51 this.context = new Context(getContextSupport());
52 }
53
54 public static XPathPattern create(OzoneInterface db, String text) {
55 final Class [] signature = new Class [] {String .class};
56 return (XPathPattern) db.createObject(XPathPatternImpl.class,
57 signature,
58 new Object []{text}
59 );
60
61 }
62
63 public XPathPatternImpl(String text) {
64 this.text = text;
65 this.context = new Context(getContextSupport());
66 try {
67 this.pattern = PatternParser.parse(text);
68 } catch (Exception e) {
69 throw new InvalidXPathException(text, e.getMessage());
70 }
71 }
72
73 public boolean matches(Node node) {
74 try {
75 ArrayList list = new ArrayList (1);
76 list.add(node);
77 context.setNodeSet(list);
78 return pattern.matches(node, context);
79 } catch (JaxenException e) {
80 handleJaxenException(e);
81 return false;
82 }
83 }
84
85 public String getText() {
86 return text;
87 }
88
89
90 public double getPriority() {
91 return pattern.getPriority();
92 }
93
94 public org.dom4j.rule.Pattern[] getUnionPatterns() {
95 Pattern[] patterns = pattern.getUnionPatterns();
96 if (patterns != null) {
97 int size = patterns.length;
98 XPathPattern[] answer = new XPathPattern[size];
99 for (int i = 0; i < size; i++) {
100 answer[i] = create(database(), patterns[i]);
101 }
102 return answer;
103 }
104 return null;
105 }
106
107 public short getMatchType() {
108 return pattern.getMatchType();
109 }
110
111 public String getMatchesNodeName() {
112 return pattern.getMatchesNodeName();
113 }
114
115 public void setVariableContext(VariableContext variableContext) {
116 context.getContextSupport().setVariableContext(variableContext);
117 }
118
119
120 public String toString() {
121 return "[XPathPatternImpl: text: " + text + " Pattern: " + pattern + "]";
122 }
123
124 protected ContextSupport getContextSupport() {
125 return new ContextSupport(
126 new SimpleNamespaceContext(),
127 XPathFunctionContext.getInstance(),
128 new SimpleVariableContext(),
129 DocumentNavigator.getInstance()
130 );
131 }
132
133 protected void handleJaxenException(JaxenException e) throws XPathException {
134 throw new XPathException(text, e);
135 }
136 }
137
138
139
183 |
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