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    1   /*
    2    $Id: ArrayExpression.java,v 1.16 2006/01/19 00:06:51 blackdrag Exp $
    3
    4    Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
    5
    6    Redistribution and use of this software and associated documentation
    7    ("Software"), with or without modification, are permitted provided
    8    that the following conditions are met:
    9
    10   1. Redistributions of source code must retain copyright
    11      statements and notices.  Redistributions must also contain a
    12      copy of this document.
    13
    14   2. Redistributions in binary form must reproduce the
    15      above copyright notice, this list of conditions and the
    16      following disclaimer in the documentation and/or other
    17      materials provided with the distribution.
    18
    19   3. The name "groovy" must not be used to endorse or promote
    20      products derived from this Software without prior written
    21      permission of The Codehaus.  For written permission,
    22      please contact info@codehaus.org.
    23
    24   4. Products derived from this Software may not be called "groovy"
    25      nor may "groovy" appear in their names without prior written
    26      permission of The Codehaus. "groovy" is a registered
    27      trademark of The Codehaus.
    28
    29   5. Due credit should be given to The Codehaus -
    30      http://groovy.codehaus.org/
    31
    32   THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
    33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
    34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
    35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
    36   THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
    37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    39   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    40   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    41   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    42   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
    43   OF THE POSSIBILITY OF SUCH DAMAGE.
    44
    45   */
    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: 1.16 $
    61   */
    62  public class ArrayExpression extends Expression {
    63      private List expressions;
    64      private List sizeExpression;
    65
    66      private ClassNode elementType;
    67
    68      private static ClassNode makeArray(ClassNode base, List sizeExpression) {
    69      	ClassNode ret = base.makeArray();
    70      	if (sizeExpression==null) return ret;
    71      	int size = sizeExpression.size();
    72      	for (int i=1; i<size; i++) {
    73      		ret = ret.makeArray();
    74      	}
    75      	return ret;
    76      }
    77
    78      public ArrayExpression(ClassNode elementType, List expressions, List sizeExpression) {
    79          //expect to get the elementType
    80          super.setType(makeArray(elementType,sizeExpression));
    81          if (expressions==null) expressions=Collections.EMPTY_LIST;
    82          this.elementType = elementType;
    83          this.expressions = expressions;
    84          this.sizeExpression = sizeExpression;
    85
    86          for (Iterator iter = expressions.iterator(); iter.hasNext();) {
    87              Object item = iter.next();
    88              if (item!=null && !(item instanceof Expression)) {
    89                  throw new ClassCastException("Item: " + item + " is not an Expression");
    90              }
    91          }
    92          if (sizeExpression!=null) {
    93  	        for (Iterator iter = sizeExpression.iterator(); iter.hasNext();) {
    94  	            Object item = iter.next();
    95  	            if (!(item instanceof Expression)) {
    96  	                throw new ClassCastException("Item: " + item + " is not an Expression");
    97  	            }
    98  	        }
    99          }
    100     }
    101
    102
    103     /***
    104      * Creates an array using an initializer expression
    105      */
    106     public ArrayExpression(ClassNode elementType, List expressions) {
    107         this(elementType,expressions,null);
    108     }
    109
    110     public void addExpression(Expression expression) {
    111         expressions.add(expression);
    112     }
    113
    114     public List getExpressions() {
    115         return expressions;
    116     }
    117
    118     public void visit(GroovyCodeVisitor visitor) {
    119         visitor.visitArrayExpression(this);
    120     }
    121
    122     public boolean isDynamic() {
    123         return false;
    124     }
    125
    126     public Expression transformExpression(ExpressionTransformer transformer) {
    127     	List exprList = transformExpressions(expressions, transformer);
    128     	List sizes = null;
    129     	if (sizeExpression!=null) sizes = transformExpressions(sizeExpression,transformer);
    130         Expression ret = new ArrayExpression(elementType, exprList, sizes);
    131         ret.setSourcePosition(this);
    132         return ret;
    133     }
    134
    135     public Expression getExpression(int i) {
    136         Object object = expressions.get(i);
    137         return (Expression) object;
    138     }
    139
    140     public ClassNode getElementType() {
    141         return elementType;
    142     }
    143
    144     public String getText() {
    145         StringBuffer buffer = new StringBuffer("[");
    146         boolean first = true;
    147         for (Iterator iter = expressions.iterator(); iter.hasNext();) {
    148             if (first) {
    149                 first = false;
    150             }
    151             else {
    152                 buffer.append(", ");
    153             }
    154
    155             buffer.append(((Expression) iter.next()).getText());
    156         }
    157         buffer.append("]");
    158         return buffer.toString();
    159     }
    160
    161     public List getSizeExpression() {
    162         return sizeExpression;
    163     }
    164
    165     public String toString() {
    166         return super.toString() + expressions;
    167     }
    168 }