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


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19
20
21 package org.apache.cayenne.exp.parser;
22
23 import org.apache.cayenne.exp.ExpressionException;
24
25 /**
26  * Superclass of conditional expressions.
27  *
28  * @since 1.1
29  * @author Andrus Adamchik
30  */
31 public abstract class ConditionNode extends SimpleNode {
32
33     public ConditionNode(int i) {
34         super(i);
35     }
36
37     public void jjtSetParent(Node n) {
38         // this is a check that we can't handle properly
39 // in the grammar... do it here...
40
41         // disallow non-aggregated condition parents...
42 if (!(n instanceof AggregateConditionNode)) {
43             String JavaDoc label = (n instanceof SimpleNode) ? ((SimpleNode)n).expName() : String.valueOf(n);
44             throw new ExpressionException(expName() + ": invalid parent - " + label);
45         }
46
47         super.jjtSetParent(n);
48     }
49 }
50
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