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1
17
18 package org.apache.jasper.el;
19
20 import java.util.Iterator  ;
21
22 import javax.el.ArrayELResolver;
23 import javax.el.BeanELResolver;
24 import javax.el.CompositeELResolver;
25 import javax.el.ELContext;
26 import javax.el.ELException;
27 import javax.el.ELResolver;
28 import javax.el.ListELResolver;
29 import javax.el.MapELResolver;
30 import javax.el.PropertyNotFoundException;
31 import javax.el.PropertyNotWritableException;
32 import javax.el.ResourceBundleELResolver;
33 import javax.servlet.jsp.el.VariableResolver ;
34
35 public final class ELResolverImpl extends ELResolver {
36
37 public final static ELResolver DefaultResolver = new CompositeELResolver();
38
39 static {
40 ((CompositeELResolver) DefaultResolver).add(new MapELResolver());
41 ((CompositeELResolver) DefaultResolver).add(new ResourceBundleELResolver());
42 ((CompositeELResolver) DefaultResolver).add(new ListELResolver());
43 ((CompositeELResolver) DefaultResolver).add(new ArrayELResolver());
44 ((CompositeELResolver) DefaultResolver).add(new BeanELResolver());
45 }
46
47 private final VariableResolver variableResolver;
48
49 public ELResolverImpl(VariableResolver variableResolver) {
50 this.variableResolver = variableResolver;
51 }
52
53 public Object getValue(ELContext context, Object base, Object property)
54 throws NullPointerException , PropertyNotFoundException, ELException {
55 if (context == null) {
56 throw new NullPointerException ();
57 }
58
59 if (base == null) {
60 context.setPropertyResolved(true);
61 if (property != null) {
62 try {
63 return this.variableResolver.resolveVariable(property
64 .toString());
65 } catch (javax.servlet.jsp.el.ELException e) {
66 throw new ELException(e.getMessage(), e.getCause());
67 }
68 }
69 }
70
71 if (!context.isPropertyResolved()) {
72 return DefaultResolver.getValue(context, base, property);
73 }
74 return null;
75 }
76
77 public Class <?> getType(ELContext context, Object base, Object property)
78 throws NullPointerException , PropertyNotFoundException, ELException {
79 if (context == null) {
80 throw new NullPointerException ();
81 }
82
83 if (base == null) {
84 context.setPropertyResolved(true);
85 if (property != null) {
86 try {
87 Object obj = this.variableResolver.resolveVariable(property
88 .toString());
89 return (obj != null) ? obj.getClass() : null;
90 } catch (javax.servlet.jsp.el.ELException e) {
91 throw new ELException(e.getMessage(), e.getCause());
92 }
93 }
94 }
95
96 if (!context.isPropertyResolved()) {
97 return DefaultResolver.getType(context, base, property);
98 }
99 return null;
100 }
101
102 public void setValue(ELContext context, Object base, Object property,
103 Object value) throws NullPointerException ,
104 PropertyNotFoundException, PropertyNotWritableException,
105 ELException {
106 if (context == null) {
107 throw new NullPointerException ();
108 }
109
110 if (base == null) {
111 context.setPropertyResolved(true);
112 throw new PropertyNotWritableException(
113 "Legacy VariableResolver wrapped, not writable");
114 }
115
116 if (!context.isPropertyResolved()) {
117 DefaultResolver.setValue(context, base, property, value);
118 }
119 }
120
121 public boolean isReadOnly(ELContext context, Object base, Object property)
122 throws NullPointerException , PropertyNotFoundException, ELException {
123 if (context == null) {
124 throw new NullPointerException ();
125 }
126
127 if (base == null) {
128 context.setPropertyResolved(true);
129 return true;
130 }
131
132 return DefaultResolver.isReadOnly(context, base, property);
133 }
134
135 public Iterator <java.beans.FeatureDescriptor > getFeatureDescriptors(ELContext context, Object base) {
136 return DefaultResolver.getFeatureDescriptors(context, base);
137 }
138
139 public Class <?> getCommonPropertyType(ELContext context, Object base) {
140 if (base == null) {
141 return String .class;
142 }
143 return DefaultResolver.getCommonPropertyType(context, base);
144 }
145
146 }
147 |
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