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: * Implementation of PropertyAccessor that sets and gets properties by storing and looking
37: * up values in Maps.
38: * @author Luke Blanshard (blanshlu@netscape.net)
39: * @author Drew Davidson (drew@ognl.org)
40: */
41: public class MapPropertyAccessor implements PropertyAccessor {
42: public Object getProperty(Map context, Object target, Object name)
43: throws OgnlException {
44: Object result;
45: Map map = (Map) target;
46: Node currentNode = ((OgnlContext) context).getCurrentNode()
47: .jjtGetParent();
48: boolean indexedAccess = false;
49:
50: if (currentNode == null) {
51: throw new OgnlException("node is null for '" + name + "'");
52: }
53: if (!(currentNode instanceof ASTProperty)) {
54: currentNode = currentNode.jjtGetParent();
55: }
56: if (currentNode instanceof ASTProperty) {
57: indexedAccess = ((ASTProperty) currentNode)
58: .isIndexedAccess();
59: }
60: if ((name instanceof String) && !indexedAccess) {
61: if (name.equals("size")) {
62: result = new Integer(map.size());
63: } else {
64: if (name.equals("keys")) {
65: result = map.keySet();
66: } else {
67: if (name.equals("values")) {
68: result = map.values();
69: } else {
70: if (name.equals("isEmpty")) {
71: result = map.isEmpty() ? Boolean.TRUE
72: : Boolean.FALSE;
73: } else {
74: result = map.get(name);
75: }
76: }
77: }
78: }
79: } else {
80: result = map.get(name);
81: }
82: return result;
83: }
84:
85: public void setProperty(Map context, Object target, Object name,
86: Object value) throws OgnlException {
87: Map map = (Map) target;
88: map.put(name, value);
89: }
90: }
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