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1
56 package org.objectstyle.cayenne.exp.parser;
57
58 import java.io.PrintWriter  ;
59 import java.util.ArrayList ;
60 import java.util.Collection ;
61 import java.util.Iterator ;
62 import java.util.List ;
63
64 import org.objectstyle.cayenne.exp.Expression;
65
66
72 public class ASTList extends SimpleNode {
73 protected Object [] values;
74
75 ASTList(int id) {
76 super(id);
77 }
78
79 public ASTList() {
80 super(ExpressionParserTreeConstants.JJTLIST);
81 }
82
83
86 public ASTList(Object [] objects) {
87 super(ExpressionParserTreeConstants.JJTLIST);
88 setValues(objects);
89 }
90
91
94 public ASTList(Collection objects) {
95 super(ExpressionParserTreeConstants.JJTLIST);
96 setValues(objects);
97 }
98
99
102 public ASTList(Iterator objects) {
103 super(ExpressionParserTreeConstants.JJTLIST);
104 setValues(objects);
105 }
106
107
110 public Expression shallowCopy() {
111 return new ASTList(id);
112 }
113
114 protected Object evaluateNode(Object o) throws Exception {
115 return values;
116 }
117
118 public int getType() {
119 return Expression.LIST;
120 }
121
122 protected String getExpressionOperator(int index) {
123 return ",";
124 }
125
126 public void encodeAsString(PrintWriter pw) {
127 pw.print('(');
128
129 if ((values != null) && (values.length > 0)) {
130 for (int i = 0; i < values.length; ++i) {
131 if (i > 0) {
132 pw.print(getExpressionOperator(i));
133 pw.print(' ');
134 }
135
136 if (values[i] instanceof Expression) {
137 ((Expression) values[i]).encodeAsString(pw);
138 }
139 else {
140 encodeScalarAsString(pw, values[i]);
141 }
142 }
143 }
144
145 pw.print(')');
146 }
147
148 public int getOperandCount() {
149 return 1;
150 }
151
152 public Object getOperand(int index) {
153 if (index == 0) {
154 return values;
155 }
156
157 throw new ArrayIndexOutOfBoundsException (index);
158 }
159
160 public void setOperand(int index, Object value) {
161 if (index != 0) {
162 throw new ArrayIndexOutOfBoundsException (index);
163 }
164
165 setValues(value);
166 }
167
168
172 protected void setValues(Object value) {
173 if (value == null) {
174 this.values = null;
175 }
176 else if (value instanceof Object []) {
177 this.values = (Object []) value;
178 }
179 else if (value instanceof Collection ) {
180 this.values = ((Collection ) value).toArray();
181 }
182 else if (value instanceof Iterator ) {
183 List values = new ArrayList ();
184 Iterator it = (Iterator ) value;
185 while (it.hasNext()) {
186 values.add(it.next());
187 }
188
189 this.values = values.toArray();
190 }
191 else {
192 throw new IllegalArgumentException (
193 "Invalid value class '"
194 + value.getClass().getName()
195 + "', expected null, Object[], Collection, Iterator");
196 }
197 }
198
199 public void jjtClose() {
200 super.jjtClose();
201
202 int size = jjtGetNumChildren();
206 Object [] listValue = new Object [size];
207 for (int i = 0; i < size; i++) {
208 listValue[i] = unwrapChild(jjtGetChild(i));
209 }
210
211 setValues(listValue);
212
213 children = null;
215 }
216 }
217 |
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