01: //--------------------------------------------------------------------------
02: // Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
03: // All rights reserved.
04: //
05: // Redistribution and use in source and binary forms, with or without
06: // modification, are permitted provided that the following conditions are
07: // met:
08: //
09: // Redistributions of source code must retain the above copyright notice,
10: // this list of conditions and the following disclaimer.
11: // Redistributions in binary form must reproduce the above copyright
12: // notice, this list of conditions and the following disclaimer in the
13: // documentation and/or other materials provided with the distribution.
14: // Neither the name of the Drew Davidson nor the names of its contributors
15: // may be used to endorse or promote products derived from this software
16: // without specific prior written permission.
17: //
18: // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19: // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20: // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21: // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22: // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23: // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24: // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25: // OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26: // AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27: // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
28: // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
29: // DAMAGE.
30: //--------------------------------------------------------------------------
31: package ognl;
32:
33: import java.util.*;
34:
35: /**
36: * @author Luke Blanshard (blanshlu@netscape.net)
37: * @author Drew Davidson (drew@ognl.org)
38: */
39: class ASTSelectLast extends SimpleNode {
40: public ASTSelectLast(int id) {
41: super (id);
42: }
43:
44: public ASTSelectLast(OgnlParser p, int id) {
45: super (p, id);
46: }
47:
48: protected Object getValueBody(OgnlContext context, Object source)
49: throws OgnlException {
50: Node expr = children[0];
51: List answer = new ArrayList();
52: ElementsAccessor elementsAccessor = OgnlRuntime
53: .getElementsAccessor(OgnlRuntime.getTargetClass(source));
54:
55: for (Enumeration e = elementsAccessor.getElements(source); e
56: .hasMoreElements();) {
57: Object next = e.nextElement();
58:
59: if (OgnlOps.booleanValue(expr.getValue(context, next))) {
60: answer.clear();
61: answer.add(next);
62: }
63: }
64: return answer;
65: }
66:
67: public String toString() {
68: return "{$ " + children[0] + " }";
69: }
70: }
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