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2 * Licensed to the Apache Software Foundation (ASF) under one *
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6 * to you under the Apache License, Version 2.0 (the *
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14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
15 * KIND, either express or implied. See the License for the *
16 * specific language governing permissions and limitations *
17 * under the License. *
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19
20 package org.apache.james.jspf.impl;
21
22
23 import org.apache.james.jspf.parser.TermDefinition;
24
25 import java.util.regex.Pattern;
26
27 /**
28 * Default implementation for the TermDefinition.
29 * This implementation try to retrieve the definition looking up a
30 * static REGEX field in the term class.
31 */
32 public class DefaultTermDefinition implements TermDefinition {
33
34 private Pattern pattern;
35
36 private Class termDef;
37
38 private int matchSize = 0;
39
40 public DefaultTermDefinition(Class tClass) throws IllegalArgumentException,
41 SecurityException, IllegalAccessException, NoSuchFieldException {
42 String pString = (String) tClass.getField("REGEX").get(null);
43 pattern = Pattern.compile(pString);
44 termDef = tClass;
45 calcGroups(pString);
46 }
47
48 /**
49 * This method should be done differently. We currently don't hanlde the
50 * escaping at all.
51 *
52 * @param pString
53 */
54 private void calcGroups(String pString) {
55 int i = 0;
56 int c = 0;
57 while (true) {
58 int p1 = pString.indexOf("(", i);
59 int p2 = pString.indexOf("(?:", i);
60 if (p1 < 0)
61 break;
62 if (p1 != p2)
63 c++;
64 i = p1 + 1;
65 }
66 matchSize = c;
67 }
68
69 /**
70 * @see org.apache.james.jspf.parser.TermDefinition#getPattern()
71 */
72 public Pattern getPattern() {
73 return pattern;
74 }
75
76 /**
77 * @see org.apache.james.jspf.parser.TermDefinition#getTermDef()
78 */
79 public Class getTermDef() {
80 return termDef;
81 }
82
83 /**
84 * @see org.apache.james.jspf.parser.TermDefinition#getMatchSize()
85 */
86 public int getMatchSize() {
87 return matchSize;
88 }
89 }