01: /*
02: * Copyright 2003,2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16: package org.apache.commons.jexl.parser;
17:
18: import org.apache.commons.jexl.JexlContext;
19:
20: /**
21: * Size Method, e.g. size().
22: *
23: * @author <a href="mailto:mhw@kremvax.net">Mark H. Wilkinson</a>
24: * @version $Id: ASTSizeMethod.java 398324 2006-04-30 12:20:24Z dion $
25: */
26: public class ASTSizeMethod extends SimpleNode {
27: /**
28: * Create the node given an id.
29: *
30: * @param id node id.
31: */
32: public ASTSizeMethod(int id) {
33: super (id);
34: }
35:
36: /**
37: * Create a node with the given parser and id.
38: *
39: * @param p a parser.
40: * @param id node id.
41: */
42: public ASTSizeMethod(Parser p, int id) {
43: super (p, id);
44: }
45:
46: /** {@inheritDoc} */
47: public Object jjtAccept(ParserVisitor visitor, Object data) {
48: return visitor.visit(this , data);
49: }
50:
51: /**
52: * evaluate size as part of an expression on a base object.
53: *
54: * foo.bar.size
55: *
56: * @param jc the {@link JexlContext} to evaluate against.
57: * @param obj not used.
58: * @return the value of the array expression.
59: * @throws Exception on any error
60: */
61: public Object execute(Object obj, JexlContext jc) throws Exception {
62: return new Integer(ASTSizeFunction.sizeOf(obj));
63: }
64:
65: }
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