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46 package org.codehaus.groovy.ast.expr;
47
48 import java.util.Collections;
49 import java.util.Iterator;
50 import java.util.List;
51
52 import org.codehaus.groovy.ast.ClassNode;
53 import org.codehaus.groovy.ast.GroovyCodeVisitor;
54
55 /***
56 * Represents an array object construction either using a fixed size
57 * or an initializer expression
58 *
59 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
60 * @version $Revision: 1.14 $
61 */
62 public class ArrayExpression extends Expression {
63 private List expressions;
64 private Expression sizeExpression;
65
66 private ClassNode elementType;
67
68 private ArrayExpression(ClassNode elementType, List expressions, Expression sizeExpression) {
69
70 super.setType(elementType.makeArray());
71 this.elementType = elementType;
72 this.expressions = expressions;
73 this.sizeExpression = sizeExpression;
74
75 for (Iterator iter = expressions.iterator(); iter.hasNext();) {
76 Object item = iter.next();
77 if (!(item instanceof Expression)) {
78 throw new ClassCastException("Item: " + item + " is not an Expression");
79 }
80 }
81 }
82
83
84 /***
85 * Creates an array using an initializer expression
86 */
87 public ArrayExpression(ClassNode elementType, List expressions) {
88 this(elementType,expressions,null);
89 }
90
91 /***
92 * Creates an empty array of a certain size
93 */
94 public ArrayExpression(ClassNode elementType, Expression sizeExpression) {
95 this(elementType,Collections.EMPTY_LIST,sizeExpression);
96 }
97
98 public void addExpression(Expression expression) {
99 expressions.add(expression);
100 }
101
102 public List getExpressions() {
103 return expressions;
104 }
105
106 public void visit(GroovyCodeVisitor visitor) {
107 visitor.visitArrayExpression(this);
108 }
109
110 public boolean isDynamic() {
111 return false;
112 }
113
114 public Expression transformExpression(ExpressionTransformer transformer) {
115 return new ArrayExpression(elementType, transformExpressions(expressions, transformer), transformer.transform(sizeExpression));
116 }
117
118 public Expression getExpression(int i) {
119 Object object = expressions.get(i);
120 return (Expression) object;
121 }
122
123 public ClassNode getElementType() {
124 return elementType;
125 }
126
127 public String getText() {
128 StringBuffer buffer = new StringBuffer("[");
129 boolean first = true;
130 for (Iterator iter = expressions.iterator(); iter.hasNext();) {
131 if (first) {
132 first = false;
133 }
134 else {
135 buffer.append(", ");
136 }
137
138 buffer.append(((Expression) iter.next()).getText());
139 }
140 buffer.append("]");
141 return buffer.toString();
142 }
143
144 public Expression getSizeExpression() {
145 return sizeExpression;
146 }
147
148 public String toString() {
149 return super.toString() + expressions;
150 }
151 }