001 /* 002 $Id: Expression.java 4032 2006-08-30 07:18:49Z mguillem $ 003 004 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. 005 006 Redistribution and use of this software and associated documentation 007 ("Software"), with or without modification, are permitted provided 008 that the following conditions are met: 009 010 1. Redistributions of source code must retain copyright 011 statements and notices. Redistributions must also contain a 012 copy of this document. 013 014 2. Redistributions in binary form must reproduce the 015 above copyright notice, this list of conditions and the 016 following disclaimer in the documentation and/or other 017 materials provided with the distribution. 018 019 3. The name "groovy" must not be used to endorse or promote 020 products derived from this Software without prior written 021 permission of The Codehaus. For written permission, 022 please contact info@codehaus.org. 023 024 4. Products derived from this Software may not be called "groovy" 025 nor may "groovy" appear in their names without prior written 026 permission of The Codehaus. "groovy" is a registered 027 trademark of The Codehaus. 028 029 5. Due credit should be given to The Codehaus - 030 http://groovy.codehaus.org/ 031 032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS 033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 043 OF THE POSSIBILITY OF SUCH DAMAGE. 044 045 */ 046 package org.codehaus.groovy.ast.expr; 047 048 import java.util.ArrayList; 049 import java.util.Iterator; 050 import java.util.List; 051 052 import org.codehaus.groovy.ast.ASTNode; 053 import org.codehaus.groovy.ast.ClassHelper; 054 import org.codehaus.groovy.ast.ClassNode; 055 056 /** 057 * Represents a base class for expressions which evaluate as an object 058 * 059 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> 060 * @version $Revision: 4032 $ 061 */ 062 public abstract class Expression extends ASTNode { 063 064 private ClassNode type=ClassHelper.DYNAMIC_TYPE; 065 066 /** 067 * Return a copy of the expression calling the transformer on any nested expressions 068 * @param transformer 069 */ 070 public abstract Expression transformExpression(ExpressionTransformer transformer); 071 072 /** 073 * Transforms the list of expressions 074 * @return a new list of transformed expressions 075 */ 076 protected List transformExpressions(List expressions, ExpressionTransformer transformer) { 077 List list = new ArrayList(expressions.size()); 078 for (Iterator iter = expressions.iterator(); iter.hasNext(); ) { 079 list.add(transformer.transform((Expression) iter.next())); 080 } 081 return list; 082 } 083 084 public ClassNode getType() { 085 return type; 086 } 087 088 public void setType(ClassNode t) { 089 type=t; 090 } 091 }