Source code: ognl/ASTProperty.java
1 //--------------------------------------------------------------------------
2 // Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
3 // All rights reserved.
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
7 // met:
8 //
9 // 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.beans.IndexedPropertyDescriptor;
34 import java.beans.PropertyDescriptor;
35 import java.util.Map;
36
37 /**
38 * @author Luke Blanshard (blanshlu@netscape.net)
39 * @author Drew Davidson (drew@ognl.org)
40 */
41 class ASTProperty extends SimpleNode
42 {
43 private boolean indexedAccess = false;
44
45 public ASTProperty(int id)
46 {
47 super(id);
48 }
49
50 public ASTProperty(OgnlParser p, int id)
51 {
52 super(p, id);
53 }
54
55 public void setIndexedAccess( boolean value )
56 {
57 indexedAccess = value;
58 }
59
60 /**
61 Returns true iff this property is itself an index reference.
62 */
63 public boolean isIndexedAccess()
64 {
65 return indexedAccess;
66 }
67
68 /**
69 Returns true if this property is described by an IndexedPropertyDescriptor
70 and that if followed by an index specifier it will call the index get/set
71 methods rather than go through property accessors.
72 */
73 public int getIndexedPropertyType(OgnlContext context, Object source) throws OgnlException
74 {
75 if (!isIndexedAccess()) {
76 Object property = getProperty(context, source);
77
78 if (property instanceof String) {
79 return OgnlRuntime.getIndexedPropertyType(context, (source == null) ? null : source.getClass(), (String)property);
80 }
81 }
82 return OgnlRuntime.INDEXED_PROPERTY_NONE;
83 }
84
85 public Object getProperty( OgnlContext context, Object source ) throws OgnlException
86 {
87 return children[0].getValue( context, context.getRoot() );
88 }
89
90 protected Object getValueBody( OgnlContext context, Object source ) throws OgnlException
91 {
92 Object result,
93 property = getProperty(context, source);
94 Node indexSibling;
95
96 result = OgnlRuntime.getProperty( context, source, property );
97 if (result == null) {
98 result = OgnlRuntime.getNullHandler(OgnlRuntime.getTargetClass(source)).nullPropertyValue(context, source, property);
99 }
100 return result;
101 }
102
103 protected void setValueBody( OgnlContext context, Object target, Object value ) throws OgnlException
104 {
105 OgnlRuntime.setProperty( context, target, getProperty( context, target), value );
106 }
107
108 public boolean isNodeSimpleProperty( OgnlContext context ) throws OgnlException
109 {
110 return (children != null) && (children.length == 1) && ((SimpleNode)children[0]).isConstant(context);
111 }
112
113 public String toString()
114 {
115 String result;
116
117 if (isIndexedAccess()) {
118 result = "[" + children[0] + "]";
119 } else {
120 result = ((ASTConst)children[0]).getValue().toString();
121 }
122 return result;
123 }
124 }