1 /***
2 * Copyright 2003-2010 Terracotta, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package net.sf.ehcache.search.expression;
18
19 import java.util.Map;
20
21 import net.sf.ehcache.Element;
22 import net.sf.ehcache.search.attribute.AttributeExtractor;
23
24 /***
25 * A search criteria composed of the logical "or" of two or more other criteria
26 *
27 * @author teck
28 */
29 public class Or extends BaseCriteria {
30
31 private final Criteria[] criteria;
32
33 /***
34 * Simple constructor for two criteria
35 *
36 * @param lhs the left hand side of the "or" expression
37 * @param rhs the right hand side of the "or" expression
38 */
39 public Or(Criteria lhs, Criteria rhs) {
40 this.criteria = new Criteria[] {lhs, rhs};
41 }
42
43 private Or(Or original, Criteria additional) {
44 Criteria[] originalCriteria = original.getCriterion();
45 this.criteria = new Criteria[originalCriteria.length + 1];
46 System.arraycopy(originalCriteria, 0, criteria, 0, originalCriteria.length);
47 this.criteria[originalCriteria.length] = additional;
48 }
49
50 /***
51 * {@inheritDoc}
52 */
53 @Override
54 public Criteria or(Criteria other) {
55 return new Or(this, other);
56 }
57
58 /***
59 * Return criteria
60 *
61 * @return criteria
62 */
63 public Criteria[] getCriterion() {
64 return criteria;
65 }
66
67 /***
68 * {@inheritDoc}
69 */
70 public boolean execute(Element e, Map<String, AttributeExtractor> attributeExtractors) {
71 for (Criteria c : criteria) {
72 if (c.execute(e, attributeExtractors)) {
73 return true;
74 }
75 }
76 return false;
77 }
78 }