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1
56 package org.objectstyle.cayenne.exp.parser;
57
58 import java.math.BigDecimal  ;
59 import java.util.Collection ;
60 import java.util.Iterator ;
61
62 import org.objectstyle.cayenne.exp.Expression;
63 import org.objectstyle.cayenne.util.ConversionUtil;
64
65
70 public class ASTAdd extends SimpleNode {
71 ASTAdd(int id) {
72 super(id);
73 }
74
75 public ASTAdd() {
76 super(ExpressionParserTreeConstants.JJTADD);
77 }
78
79 public ASTAdd(Object [] nodes) {
80 super(ExpressionParserTreeConstants.JJTADD);
81 int len = nodes.length;
82 for (int i = 0; i < len; i++) {
83 jjtAddChild(wrapChild(nodes[i]), i);
84 }
85 }
86
87 public ASTAdd(Collection nodes) {
88 super(ExpressionParserTreeConstants.JJTADD);
89 int len = nodes.size();
90 Iterator it = nodes.iterator();
91 for (int i = 0; i < len; i++) {
92 jjtAddChild(wrapChild(it.next()), i);
93 }
94 }
95
96 protected Object evaluateNode(Object o) throws Exception {
97 int len = jjtGetNumChildren();
98 if (len == 0) {
99 return null;
100 }
101
102 BigDecimal result = null;
103 for (int i = 0; i < len; i++) {
104 BigDecimal value = ConversionUtil.toBigDecimal(evaluateChild(i, o));
105
106 if (value == null) {
107 return null;
108 }
109
110 result = (i == 0) ? value : result.add(value);
111 }
112
113 return result;
114 }
115
116
119 public Expression shallowCopy() {
120 return new ASTAdd(id);
121 }
122
123 protected String getExpressionOperator(int index) {
124 return "+";
125 }
126
127 public int getType() {
128 return Expression.ADD;
129 }
130
131 public void jjtClose() {
132 super.jjtClose();
133 flattenTree();
134 }
135 }
136 |
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