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1
56 package org.objectstyle.cayenne.exp;
57
58 import java.io.PrintWriter  ;
59
60
65 public class TernaryExpression extends Expression {
66 protected Object operand0;
67 protected Object operand1;
68 protected Object operand2;
69
70 public TernaryExpression() {
71 }
72
73 public TernaryExpression(int type) {
74 this.type = type;
75 }
76
77 protected void flattenTree() {
78
79 }
80
81 protected boolean pruneNodeForPrunedChild(Object prunedChild) {
82 return true;
83 }
84
85 public final int getOperandCount() {
86 return 3;
87 }
88
89
94 public Expression shallowCopy() {
95 return new TernaryExpression(type);
96 }
97
98 public Object getOperand(int index) {
99 if (index == 0)
100 return operand0;
101 else if (index == 1)
102 return operand1;
103 else if (index == 2)
104 return operand2;
105
106 throw new IllegalArgumentException (
107 "Invalid operand index for TernaryExpression: " + index);
108 }
109
110 public void setOperand(int index, Object value) {
111 if (index == 0) {
112 operand0 = value;
113 return;
114 }
115 else if (index == 1) {
116 operand1 = value;
117 return;
118 }
119 else if (index == 2) {
120 operand2 = value;
121 return;
122 }
123
124 throw new IllegalArgumentException (
125 "Invalid operand index for TernaryExpression: " + index);
126 }
127
128
131 public void encodeAsString(PrintWriter pw) {
132 StringBuffer buffer = new StringBuffer ();
135 toStringBuffer(buffer);
136 pw.print(buffer.toString());
137 }
138 } |
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