This repository was archived by the owner on Jan 30, 2019. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 10
Expand file tree
/
Copy pathAstFunction.java
More file actions
227 lines (202 loc) · 8.34 KB
/
AstFunction.java
File metadata and controls
227 lines (202 loc) · 8.34 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.el.parser;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import javax.el.ELException;
import javax.el.FunctionMapper;
import javax.el.LambdaExpression;
import javax.el.ValueExpression;
import javax.el.VariableMapper;
import javax.el.ELClass;
import com.sun.el.lang.EvaluationContext;
import com.sun.el.util.MessageFactory;
/**
* @author Jacob Hookom [jacob@hookom.net]
* @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: kchung $
*/
public final class AstFunction extends SimpleNode {
protected String localName = "";
protected String prefix = "";
public AstFunction(int id) {
super(id);
}
public String getLocalName() {
return localName;
}
public String getOutputName() {
if (this.prefix.length() == 0) {
return this.localName;
} else {
return this.prefix + ":" + this.localName;
}
}
public String getPrefix() {
return prefix;
}
@Override
public Class getType(EvaluationContext ctx)
throws ELException {
FunctionMapper fnMapper = ctx.getFunctionMapper();
// quickly validate again for this request
if (fnMapper == null) {
throw new ELException(MessageFactory.get("error.fnMapper.null"));
}
Method m = fnMapper.resolveFunction(this.prefix, this.localName);
if (m == null) {
throw new ELException(MessageFactory.get("error.fnMapper.method",
this.getOutputName()));
}
return m.getReturnType();
}
/*
* Find the object associated with the given name. Return null if the
* there is no such object.
*/
private Object findValue(EvaluationContext ctx, String name) {
Object value;
// First check if this is a Lambda argument
if (ctx.isLambdaArgument(name)) {
return ctx.getLambdaArgument(name);
}
// Next check if this an EL variable
VariableMapper varMapper = ctx.getVariableMapper();
if (varMapper != null) {
ValueExpression expr = varMapper.resolveVariable(name);
if (expr != null) {
return expr.getValue(ctx.getELContext());
}
}
// Check if this is resolvable by an ELResolver
ctx.setPropertyResolved(false);
Object ret = ctx.getELResolver().getValue(ctx, null, name);
if (ctx.isPropertyResolved()) {
return ret;
}
return null;
}
@Override
public Object getValue(EvaluationContext ctx)
throws ELException {
// Check to see if a function is a bean that is a Lambdaexpression.
// If so, invoke it. Also allow for the case that a Lambda expression
// can return another Lambda expression.
if (prefix.length() == 0) {
Object val = findValue(ctx, this.localName);
// Check the case of repeated lambda invocation, such as f()()()
if ((val != null) && (val instanceof LambdaExpression)) {
for (int i = 0; i < this.children.length; i++) {
Object[] params = ((AstMethodArguments)this.children[i]).
getParameters(ctx);
if (! (val instanceof LambdaExpression)) {
throw new ELException(MessageFactory.get(
"error.function.syntax", getOutputName()));
}
val = ((LambdaExpression)val).invoke(ctx, params);
}
return val;
}
}
FunctionMapper fnMapper = ctx.getFunctionMapper();
// quickly validate again for this request
if (fnMapper == null) {
throw new ELException(MessageFactory.get("error.fnMapper.null"));
}
Method m = fnMapper.resolveFunction(this.prefix, this.localName);
if (m == null) {
if (this.prefix.length() == 0 && ctx.getImportHandler() != null) {
Class<?> c = null;;
// Check if this is a constructor call for an imported class
c = ctx.getImportHandler().resolveClass(this.localName);
String methodName = null;
if (c != null) {
methodName = "<init>";
} else {
// Check if this is a imported static method
c = ctx.getImportHandler().resolveStatic(this.localName);
methodName = this.localName;;
}
if (c != null) {
// Use StaticFieldELResolver to invoke the constructor or the
// static method.
Object[] params =
((AstMethodArguments)this.children[0]).getParameters(ctx);
return ctx.getELResolver().invoke(ctx, new ELClass(c),
methodName, null, params);
}
}
throw new ELException(MessageFactory.get("error.fnMapper.method",
this.getOutputName()));
}
Class[] paramTypes = m.getParameterTypes();
Object[] params =
((AstMethodArguments)this.children[0]).getParameters(ctx);
Object result = null;
for (int i = 0; i < params.length; i++) {
try {
params[i] = ctx.convertToType(params[i], paramTypes[i]);
} catch (ELException ele) {
throw new ELException(MessageFactory.get("error.function", this
.getOutputName()), ele);
}
}
try {
result = m.invoke(null, params);
} catch (IllegalAccessException iae) {
throw new ELException(MessageFactory.get("error.function", this
.getOutputName()), iae);
} catch (InvocationTargetException ite) {
throw new ELException(MessageFactory.get("error.function", this
.getOutputName()), ite.getCause());
}
return result;
}
public void setLocalName(String localName) {
this.localName = localName;
}
public void setPrefix(String prefix) {
this.prefix = prefix;
}
@Override
public String toString()
{
return ELParserTreeConstants.jjtNodeName[id] + "[" + this.getOutputName() + "]";
}
}