01: /*
02: $Id: Expression.java 4032 2006-08-30 07:18:49Z mguillem $
03:
04: Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
05:
06: Redistribution and use of this software and associated documentation
07: ("Software"), with or without modification, are permitted provided
08: that the following conditions are met:
09:
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.ArrayList;
49: import java.util.Iterator;
50: import java.util.List;
51:
52: import org.codehaus.groovy.ast.ASTNode;
53: import org.codehaus.groovy.ast.ClassHelper;
54: import org.codehaus.groovy.ast.ClassNode;
55:
56: /**
57: * Represents a base class for expressions which evaluate as an object
58: *
59: * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
60: * @version $Revision: 4032 $
61: */
62: public abstract class Expression extends ASTNode {
63:
64: private ClassNode type = ClassHelper.DYNAMIC_TYPE;
65:
66: /**
67: * Return a copy of the expression calling the transformer on any nested expressions
68: * @param transformer
69: */
70: public abstract Expression transformExpression(
71: ExpressionTransformer transformer);
72:
73: /**
74: * Transforms the list of expressions
75: * @return a new list of transformed expressions
76: */
77: protected List transformExpressions(List expressions,
78: ExpressionTransformer transformer) {
79: List list = new ArrayList(expressions.size());
80: for (Iterator iter = expressions.iterator(); iter.hasNext();) {
81: list.add(transformer.transform((Expression) iter.next()));
82: }
83: return list;
84: }
85:
86: public ClassNode getType() {
87: return type;
88: }
89:
90: public void setType(ClassNode t) {
91: type = t;
92: }
93: }
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