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    1   /*
    2    $Id: ArrayExpression.java,v 1.7 2004/07/10 03:31:37 bran 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.GroovyCodeVisitor;
    53  import org.codehaus.groovy.classgen.BytecodeHelper;
    54  import org.codehaus.groovy.classgen.AsmClassGenerator2;
    55
    56  /***
    57   * Represents an array object construction either using a fixed size
    58   * or an initializer expression
    59   *
    60   * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
    61   * @version $Revision: 1.7 $
    62   */
    63  public class ArrayExpression extends Expression {
    64      private List expressions;
    65      private Expression sizeExpression;
    66
    67      private String elementType;
    68      /***
    69       * Creates an array using an initializer expression
    70       */
    71      public ArrayExpression(String type, List expressions) {
    72          // there is never primitive element in native groovy code
    73          String boxedType = BytecodeHelper.getObjectTypeForPrimitive(type);
    74          this.elementType = boxedType;
    75          setSuperType(boxedType);
    76          this.expressions = expressions;
    77
    78          for (Iterator iter = expressions.iterator(); iter.hasNext();) {
    79              Object item = iter.next();
    80              if (!(item instanceof Expression)) {
    81                  throw new ClassCastException("Item: " + item + " is not an Expression");
    82              }
    83          }
    84      }
    85
    86      private void setSuperType(String type) {
    87          if (type == null) System.out.println("setSuperType: null");
    88          if (type.endsWith("[]")) {
    89          }
    90          else {
    91              type += "[]";
    92          }
    93          super.setType(type); //  array type. todo probably need to wait until ClassGen time to avoid resolve "this" type
    94      }
    95
    96      /***
    97       * Creates an empty array of a certain size
    98       */
    99      public ArrayExpression(String type, Expression sizeExpression) {
    100         String boxedType = BytecodeHelper.getObjectTypeForPrimitive(type);
    101         this.elementType = boxedType;
    102         setSuperType(boxedType);
    103         this.sizeExpression = sizeExpression;
    104         this.expressions = Collections.EMPTY_LIST;
    105     }
    106
    107     public void addExpression(Expression expression) {
    108         expressions.add(expression);
    109     }
    110
    111     public List getExpressions() {
    112         return expressions;
    113     }
    114
    115     public void visit(GroovyCodeVisitor visitor) {
    116         visitor.visitArrayExpression(this);
    117     }
    118
    119     public boolean isDynamic() {
    120         return false;
    121     }
    122
    123     public Expression transformExpression(ExpressionTransformer transformer) {
    124         return new ArrayExpression(type, transformExpressions(expressions, transformer));
    125     }
    126
    127     public Expression getExpression(int i) {
    128         Object object = expressions.get(i);
    129         return (Expression) object;
    130     }
    131
    132     public String getElementType() {
    133         if (BytecodeHelper.isPrimitiveType(elementType)) {
    134             return BytecodeHelper.getObjectTypeForPrimitive(elementType);
    135         }
    136         return elementType;
    137     }
    138
    139     public String getText() {
    140         StringBuffer buffer = new StringBuffer("[");
    141         boolean first = true;
    142         for (Iterator iter = expressions.iterator(); iter.hasNext();) {
    143             if (first) {
    144                 first = false;
    145             }
    146             else {
    147                 buffer.append(", ");
    148             }
    149
    150             buffer.append(((Expression) iter.next()).getText());
    151         }
    152         buffer.append("]");
    153         return buffer.toString();
    154     }
    155
    156     public Expression getSizeExpression() {
    157         return sizeExpression;
    158     }
    159
    160     public String toString() {
    161         return super.toString() + expressions;
    162     }
    163
    164     protected void resolveType(AsmClassGenerator2 resolver) {
    165         //
    166     }
    167 }