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Java > Open Source Codes > org > apache > cayenne > exp > parser > ASTOr


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19
20 package org.apache.cayenne.exp.parser;
21
22 import java.util.Collection JavaDoc;
23 import java.util.Iterator JavaDoc;
24
25 import org.apache.cayenne.exp.Expression;
26 import org.apache.cayenne.util.ConversionUtil;
27
28 /**
29  * "Or" expression.
30  *
31  * @since 1.1
32  * @author Andrus Adamchik
33  */
34 public class ASTOr extends AggregateConditionNode {
35     ASTOr(int id) {
36         super(id);
37     }
38
39     public ASTOr() {
40         super(ExpressionParserTreeConstants.JJTOR);
41     }
42
43     public ASTOr(Object JavaDoc[] nodes) {
44         super(ExpressionParserTreeConstants.JJTOR);
45         int len = nodes.length;
46         for (int i = 0; i < len; i++) {
47             jjtAddChild((Node) nodes[i], i);
48         }
49     }
50
51     public ASTOr(Collection JavaDoc nodes) {
52         super(ExpressionParserTreeConstants.JJTOR);
53         int len = nodes.size();
54         Iterator JavaDoc it = nodes.iterator();
55         for (int i = 0; i < len; i++) {
56             jjtAddChild((Node) it.next(), i);
57         }
58     }
59
60     protected Object JavaDoc evaluateNode(Object JavaDoc o) throws Exception JavaDoc {
61         int len = jjtGetNumChildren();
62         if (len == 0) {
63             return Boolean.FALSE;
64         }
65
66         for (int i = 0; i < len; i++) {
67             if (ConversionUtil.toBoolean(evaluateChild(i, o))) {
68                 return Boolean.TRUE;
69             }
70         }
71
72         return Boolean.FALSE;
73     }
74
75     /**
76      * Creates a copy of this expression node, without copying children.
77      */
78     public Expression shallowCopy() {
79         return new ASTOr(id);
80     }
81
82     protected String JavaDoc getExpressionOperator(int index) {
83         return "or";
84     }
85
86     public int getType() {
87         return Expression.OR;
88     }
89
90     public void jjtClose() {
91         super.jjtClose();
92         flattenTree();
93     }
94 }
95
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