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Java > Open Source Codes > org > objectstyle > cayenne > exp > parser > ASTNotIn


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56
57 package org.objectstyle.cayenne.exp.parser;
58
59 import org.objectstyle.cayenne.exp.Expression;
60
61 /**
62  * "Not In" expression.
63  *
64  * @author Andrei Adamchik
65  */
66 public class ASTNotIn extends ConditionNode {
67     ASTNotIn(int id) {
68         super(id);
69     }
70
71     public ASTNotIn() {
72         super(ExpressionParserTreeConstants.JJTNOTIN);
73     }
74
75     public ASTNotIn(ASTPath path, ASTList list) {
76         super(ExpressionParserTreeConstants.JJTNOTIN);
77         jjtAddChild(path, 0);
78         jjtAddChild(list, 1);
79     }
80
81     protected Object JavaDoc evaluateNode(Object JavaDoc o) throws Exception JavaDoc {
82         int len = jjtGetNumChildren();
83         if (len != 2) {
84             return Boolean.FALSE;
85         }
86
87         Object JavaDoc o1 = evaluateChild(0, o);
88         if (o1 == null) {
89             return Boolean.FALSE;
90         }
91
92         Object JavaDoc[] objects = (Object JavaDoc[]) evaluateChild(1, o);
93         if (objects == null) {
94             return Boolean.FALSE;
95         }
96
97         int size = objects.length;
98         for (int i = 0; i < size; i++) {
99             if (o1.equals(objects[i])) {
100                 return Boolean.FALSE;
101             }
102         }
103
104         return Boolean.TRUE;
105     }
106
107     /**
108      * Creates a copy of this expression node, without copying children.
109      */
110     public Expression shallowCopy() {
111         return new ASTNotIn(id);
112     }
113
114     protected String JavaDoc getExpressionOperator(int index) {
115         return "not in";
116     }
117
118     public int getType() {
119         return Expression.NOT_IN;
120     }
121 }
122
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