/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 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.
*
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package javax.el;
import java.lang.reflect.
InvocationTargetException;
import java.lang.reflect.
Method;
import java.lang.reflect.
Constructor;
import java.lang.reflect.
Modifier;
import java.text.
MessageFormat;
import java.util.
HashMap;
import java.util.
Locale;
import java.util.
Map;
import java.util.
MissingResourceException;
import java.util.
ResourceBundle;
/**
*
* <p>Utility methods for this portion of the EL implementation</p>
*
* <p>Methods on this class use a Map instance stored in ThreadLocal storage
* to minimize the performance impact on operations that take place multiple
* times on a single Thread. The keys and values of the Map
* are implementation private.</p>
*
* @author edburns
* @author Kin-man Chung
*/
class
ELUtil {
/**
* <p>This class may not be constructed.</p>
*/
private
ELUtil() {
}
/* For testing Backward Compatibility option
static java.util.Properties properties = new java.util.Properties();
static {
properties.setProperty("javax.el.bc2.2", "true");
}
*/
public static
ExpressionFactory exprFactory =
ExpressionFactory.
newInstance(/*properties*/);
/**
* <p>The <code>ThreadLocal</code> variable used to record the
* {@link javax.faces.context.FacesContext} instance for each
* processing thread.</p>
*/
private static
ThreadLocal<
Map<
String,
ResourceBundle>>
instance =
new
ThreadLocal<
Map<
String,
ResourceBundle>>() {
protected
Map<
String,
ResourceBundle>
initialValue() {
return (null);
}
};
/**
* @return a Map stored in ThreadLocal storage. This may
* be used by methods of this class to minimize the performance
* impact for operations that may take place multiple times on a given
* Thread instance.
*/
private static
Map<
String,
ResourceBundle>
getCurrentInstance() {
Map<
String,
ResourceBundle>
result =
instance.
get();
if (null ==
result) {
result = new
HashMap<
String,
ResourceBundle>();
setCurrentInstance(
result);
}
return
result;
}
/**
* <p>Replace the Map with the argument context.</p>
*
* @param context the Map to be stored in ThreadLocal storage.
*/
private static void
setCurrentInstance(
Map<
String,
ResourceBundle>
context) {
instance.
set(
context);
}
/*
* <p>Convenience method, calls through to
* {@link #getExceptionMessageString(javax.el.ELContext,java.lang.String,Object []).
* </p>
*
* @param context the ELContext from which the Locale for this message
* is extracted.
*
* @param messageId the messageId String in the ResourceBundle
*
* @return a localized String for the argument messageId
*/
public static
String getExceptionMessageString(
ELContext context,
String messageId) {
return
getExceptionMessageString(
context,
messageId, null);
}
/*
* <p>Return a Localized message String suitable for use as an Exception message.
* Examine the argument <code>context</code> for a <code>Locale</code>. If
* not present, use <code>Locale.getDefault()</code>. Load the
* <code>ResourceBundle</code> "javax.el.Messages" using that locale. Get
* the message string for argument <code>messageId</code>. If not found
* return "Missing Resource in EL implementation ??? messageId ???"
* with messageId substituted with the runtime
* value of argument <code>messageId</code>. If found, and argument
* <code>params</code> is non-null, format the message using the
* params. If formatting fails, return a sensible message including
* the <code>messageId</code>. If argument <code>params</code> is
* <code>null</code>, skip formatting and return the message directly, otherwise
* return the formatted message.</p>
*
* @param context the ELContext from which the Locale for this message
* is extracted.
*
* @param messageId the messageId String in the ResourceBundle
*
* @param params parameters to the message
*
* @return a localized String for the argument messageId
*/
public static
String getExceptionMessageString(
ELContext context,
String messageId,
Object []
params) {
String result = "";
Locale locale = null;
if (null ==
context || null ==
messageId) {
return
result;
}
if (null == (
locale =
context.
getLocale())) {
locale =
Locale.
getDefault();
}
if (null !=
locale) {
Map<
String,
ResourceBundle>
threadMap =
getCurrentInstance();
ResourceBundle rb = null;
if (null == (
rb = (
ResourceBundle)
threadMap.
get(
locale.
toString()))) {
rb =
ResourceBundle.
getBundle("javax.el.PrivateMessages",
locale);
threadMap.
put(
locale.
toString(),
rb);
}
if (null !=
rb) {
try {
result =
rb.
getString(
messageId);
if (null !=
params) {
result =
MessageFormat.
format(
result,
params);
}
} catch (
IllegalArgumentException iae) {
result = "Can't get localized message: parameters to message appear to be incorrect. Message to format: " +
messageId;
} catch (
MissingResourceException mre) {
result = "Missing Resource in EL implementation: ???" +
messageId + "???";
} catch (
Exception e) {
result = "Exception resolving message in EL implementation: ???" +
messageId + "???";
}
}
}
return
result;
}
static
ExpressionFactory getExpressionFactory() {
return
exprFactory;
}
static
Constructor<?>
findConstructor(
Class<?>
klass,
Class<?>[]
paramTypes,
Object[]
params) {
if (
paramTypes != null) {
try {
Constructor<?>
c =
klass.
getConstructor(
paramTypes);
if (
Modifier.
isPublic(
c.
getModifiers())) {
return
c;
}
} catch (java.lang.
NoSuchMethodException ex) {
}
throw new
MethodNotFoundException("The constructor for class " +
klass + " not found or accessible");
}
int
paramCount = (
params == null)? 0:
params.length;
for (
Constructor<?>
c:
klass.
getConstructors()) {
if (
c.
isVarArgs() ||
c.
getParameterTypes().length==
paramCount) {
return
c;
}
}
throw new
MethodNotFoundException("The constructor for class " +
klass + " not found");
}
static
Object invokeConstructor(
ELContext context,
Constructor<?>
c,
Object[]
params) {
Class[]
parameterTypes =
c.
getParameterTypes();
Object[]
parameters = null;
if (
parameterTypes.length > 0) {
if (
c.
isVarArgs()) {
// TODO
} else {
parameters = new
Object[
parameterTypes.length];
for (int
i = 0;
i <
parameterTypes.length;
i++) {
parameters[
i] =
context.
convertToType(
params[
i],
parameterTypes[
i]);
}
}
}
try {
return
c.
newInstance(
parameters);
} catch (
IllegalAccessException iae) {
throw new
ELException(
iae);
} catch (
InvocationTargetException ite) {
throw new
ELException(
ite.
getCause());
} catch (
InstantiationException ie) {
throw new
ELException(
ie.
getCause());
}
}
static
Method findMethod(
Class<?>
klass,
String method,
Class<?>[]
paramTypes,
Object[]
params,
boolean
staticOnly) {
if (
paramTypes != null) {
try {
Method m =
klass.
getMethod(
method,
paramTypes);
int
mod =
m.
getModifiers();
if (
Modifier.
isPublic(
mod) &&
(!
staticOnly ||
Modifier.
isStatic(
mod))) {
return
m;
}
} catch (java.lang.
NoSuchMethodException ex) {
}
throw new
MethodNotFoundException("Method " +
method +
"for class " +
klass +
" not found or accessible");
}
int
paramCount = (
params == null)? 0:
params.length;
for (
Method m:
klass.
getMethods()) {
if (
m.
getName().
equals(
method) && (
m.
isVarArgs() ||
m.
getParameterTypes().length==
paramCount)){
return
m;
}
}
throw new
MethodNotFoundException("Method " +
method + " not found");
}
static
Object invokeMethod(
ELContext context,
Method m,
Object base,
Object[]
params) {
Class[]
parameterTypes =
m.
getParameterTypes();
Object[]
parameters = null;
if (
parameterTypes.length > 0) {
if (
m.
isVarArgs()) {
// TODO
} else {
parameters = new
Object[
parameterTypes.length];
for (int
i = 0;
i <
parameterTypes.length;
i++) {
parameters[
i] =
context.
convertToType(
params[
i],
parameterTypes[
i]);
}
}
}
try {
return
m.
invoke(
base,
parameters);
} catch (
IllegalAccessException iae) {
throw new
ELException(
iae);
} catch (
InvocationTargetException ite) {
throw new
ELException(
ite.
getCause());
}
}
}