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 }