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1
56 package org.objectstyle.cayenne.exp.parser;
57
58 import org.apache.commons.collections.Transformer;
59 import org.objectstyle.cayenne.exp.Expression;
60 import org.objectstyle.cayenne.exp.ExpressionException;
61
62
70 public abstract class AggregateConditionNode extends SimpleNode {
71 AggregateConditionNode(int i) {
72 super(i);
73 }
74
75 protected boolean pruneNodeForPrunedChild(Object  prunedChild) {
76 return false;
77 }
78
79 public Expression transform(Transformer transformer) {
80 Expression copy = super.transform(transformer);
81
82 if (!(copy instanceof AggregateConditionNode)) {
83 return copy;
84 }
85
86 switch (copy.getOperandCount()) {
89 case 1 :
90 return (Expression) copy.getOperand(0);
91 case 0 :
92 return null;
93 default :
94 return copy;
95 }
96 }
97
98 public void jjtSetParent(Node n) {
99
102 if (!(n instanceof AggregateConditionNode)) {
104 String label =
105 (n instanceof SimpleNode)
106 ? ((SimpleNode) n).expName()
107 : String.valueOf(n);
108 throw new ExpressionException(expName() + ": invalid parent - " + label);
109 }
110
111 super.jjtSetParent(n);
112 }
113
114 public void jjtAddChild(Node n, int i) {
115
118 if (!(n instanceof ConditionNode) && !(n instanceof AggregateConditionNode)) {
120 String label =
121 (n instanceof SimpleNode)
122 ? ((SimpleNode) n).expName()
123 : String.valueOf(n);
124 throw new ExpressionException(expName() + ": invalid child - " + label);
125 }
126
127 super.jjtAddChild(n, i);
128 }
129 }
130 |
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