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The public API classes of the Apache MyFaces CORE JSF-2.2 project
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.faces.convert;
import javax.el.ValueExpression;
import javax.faces.FacesException;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
/**
* @author Manfred Geiler (latest modification by $Author: lu4242 $)
* @version $Revision: 1378433 $ $Date: 2012-08-28 22:19:33 -0500 (Tue, 28 Aug 2012) $
*/
class _MessageUtils
{
private static final String DETAIL_SUFFIX = "_detail";
static FacesMessage getErrorMessage(FacesContext facesContext,
String messageId,
Object args[])
{
return getMessage(facesContext,
facesContext.getViewRoot().getLocale(),
FacesMessage.SEVERITY_ERROR,
messageId,
args);
}
static FacesMessage getMessage(FacesContext facesContext,
Locale locale,
FacesMessage.Severity severity,
String messageId,
Object args[])
{
ResourceBundle appBundle;
ResourceBundle defBundle;
String summary;
String detail;
appBundle = getApplicationBundle(facesContext, locale);
summary = getBundleString(appBundle, messageId);
if (summary != null)
{
detail = getBundleString(appBundle, messageId + DETAIL_SUFFIX);
}
else
{
defBundle = getDefaultBundle(facesContext, locale);
summary = getBundleString(defBundle, messageId);
if (summary != null)
{
detail = getBundleString(defBundle, messageId + DETAIL_SUFFIX);
}
else
{
//Try to find detail alone
detail = getBundleString(appBundle, messageId + DETAIL_SUFFIX);
if (detail != null)
{
summary = null;
}
else
{
detail = getBundleString(defBundle, messageId + DETAIL_SUFFIX);
if (detail != null)
{
summary = null;
}
else
{
//Neither detail nor summary found
facesContext.getExternalContext().log("No message with id " + messageId
+ " found in any bundle");
return new FacesMessage(severity, messageId, null);
}
}
}
}
if (args != null && args.length > 0)
{
return new _ParametrizableFacesMessage(severity, summary, detail, args, locale);
}
else
{
return new FacesMessage(severity, summary, detail);
}
}
private static String getBundleString(ResourceBundle bundle, String key)
{
try
{
return bundle == null ? null : bundle.getString(key);
}
catch (MissingResourceException e)
{
return null;
}
}
private static ResourceBundle getApplicationBundle(FacesContext facesContext, Locale locale)
{
String bundleName = facesContext.getApplication().getMessageBundle();
return bundleName != null ? getBundle(facesContext, locale, bundleName) : null;
}
private static ResourceBundle getDefaultBundle(FacesContext facesContext,
Locale locale)
{
return getBundle(facesContext, locale, FacesMessage.FACES_MESSAGES);
}
private static ResourceBundle getBundle(FacesContext facesContext,
Locale locale,
String bundleName)
{
try
{
//First we try the JSF implementation class loader
return ResourceBundle.getBundle(bundleName,
locale,
facesContext.getClass().getClassLoader());
}
catch (MissingResourceException ignore1)
{
try
{
//Next we try the JSF API class loader
return ResourceBundle.getBundle(bundleName,
locale,
_MessageUtils.class.getClassLoader());
}
catch (MissingResourceException ignore2)
{
try
{
//Last resort is the context class loader
if (System.getSecurityManager() != null)
{
Object cl = AccessController.doPrivileged(new PrivilegedExceptionAction()
{
public Object run() throws PrivilegedActionException
{
return Thread.currentThread().getContextClassLoader();
}
});
return ResourceBundle.getBundle(bundleName,locale,(ClassLoader)cl);
}
else
{
return ResourceBundle.getBundle(bundleName,locale,
Thread.currentThread().getContextClassLoader());
}
}
catch(PrivilegedActionException pae)
{
throw new FacesException(pae);
}
catch (MissingResourceException damned)
{
facesContext.getExternalContext().log("resource bundle " + bundleName + " could not be found");
return null;
}
}
}
}
static Object getLabel(FacesContext facesContext, UIComponent component)
{
Object label = component.getAttributes().get("label");
ValueExpression expression = null;
if (label != null &&
label instanceof String && ((String)label).length() == 0 )
{
// Note component.getAttributes().get("label") internally try to
// evaluate the EL expression for the label, but in some cases,
// when PSS is disabled and f:loadBundle is used, when the view is
// restored the bundle is not set to the EL expression returns an
// empty String. It is not possible to check if there is a
// hardcoded label, but we can check if there is
// an EL expression set, so the best in this case is use that, and if
// there is an EL expression set, use it, otherwise use the hardcoded
// value. See MYFACES-3591 for details.
expression = component.getValueExpression("label");
if (expression != null)
{
// Set the label to null and use the EL expression instead.
label = null;
}
}
if(label != null)
{
return label;
}
expression = (expression == null) ? component.getValueExpression("label") : expression;
if(expression != null)
{
return expression;
}
//If no label is not specified, use clientId
return component.getClientId( facesContext );
}
}
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