com.sun.faces.facelets.tag.composite.AttributeHandler Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jsf-impl Show documentation
Show all versions of jsf-impl Show documentation
This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
The newest version!
/*
* 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 2005-2007 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 com.sun.faces.facelets.tag.composite;
import com.sun.faces.facelets.tag.TagHandlerImpl;
import com.sun.faces.facelets.util.ReflectionUtil;
import com.sun.faces.util.FacesLogger;
import java.lang.reflect.Method;
import javax.el.ValueExpression;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.*;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.el.ELContext;
import javax.faces.context.FacesContext;
public class AttributeHandler extends TagHandlerImpl {
private final Logger LOGGER = FacesLogger.TAGLIB.getLogger();
private static final String[] COMPOSITE_ATTRIBUTE_ATTRIBUTES = {
"required",
"targets",
"targetAttributeName",
"default",
"displayName",
"preferred",
"hidden",
"expert",
"shortDescription",
"method-signature",
"type",
};
private static final PropertyHandlerManager ATTRIBUTE_MANAGER =
PropertyHandlerManager.getInstance(COMPOSITE_ATTRIBUTE_ATTRIBUTES);
private TagAttribute name;
public AttributeHandler(TagConfig config) {
super(config);
this.name = this.getRequiredAttribute("name");
}
public void apply(FaceletContext ctx, UIComponent parent) throws IOException {
// only process if it's been created
if (null == parent ||
(null == (parent = parent.getParent())) ||
!(ComponentHandler.isNew(parent))) {
return;
}
Map attrs = parent.getAttributes();
CompositeComponentBeanInfo componentBeanInfo =
(CompositeComponentBeanInfo) attrs.get(UIComponent.BEANINFO_KEY);
assert(null != componentBeanInfo);
List declaredAttributes =
componentBeanInfo.getPropertyDescriptorsList();
// Get the value of required the name propertyDescriptor
ValueExpression ve = name.getValueExpression(ctx, String.class);
String strValue = (String) ve.getValue(ctx);
// Search the propertyDescriptors for one for this attribute
for (PropertyDescriptor cur: declaredAttributes) {
if (strValue.endsWith(cur.getName())) {
// If we have a match, no need to waste time
// duplicating and replacing it.
return;
}
}
PropertyDescriptor propertyDescriptor;
try {
propertyDescriptor = new CCAttributePropertyDescriptor(strValue, null, null);
declaredAttributes.add(propertyDescriptor);
} catch (IntrospectionException ex) {
throw new TagException(tag, "Unable to create property descriptor for property " + strValue, ex);
}
TagAttribute defaultTagAttribute = null;
PropertyHandler defaultHandler = null;
for (TagAttribute tagAttribute : this.tag.getAttributes().getAll()) {
String attributeName = tagAttribute.getLocalName();
if("default".equals(attributeName)) {
// store the TagAttribute and the PropertyHandler for later
// execution, as the handler for the default-attribute requires,
// that the PropertyHandler for 'type' - if it exists - has been
// applied first.
defaultTagAttribute = tagAttribute;
defaultHandler = ATTRIBUTE_MANAGER.getHandler(ctx, "default");
} else {
PropertyHandler handler =
ATTRIBUTE_MANAGER.getHandler(ctx, attributeName);
if (handler != null) {
handler.apply(ctx, attributeName, propertyDescriptor,
tagAttribute);
}
}
}
if(defaultHandler!=null) {
// If the 'default'-attribute of cc:attribute was set, apply the
// previously stored PropertyHandler (see above) now, as now it is
// guaranteed that if a 'type'-attribute existed, that its handler
// was already applied
try {
defaultHandler.apply(ctx, "default", propertyDescriptor,
defaultTagAttribute);
} catch (IllegalArgumentException ex) {
// If the type (according to the type-attribute) can not be
// found, the DefaultPropertyHandler will wrapp the
// ClassNotFoundException into an IllegalArgumentException,
// which is unwrapped into a TagException here.
throw new TagException(tag,
"'type' could not be resolved: " + ex.getCause(),
ex.getCause());
}
}
this.nextHandler.apply(ctx, parent);
}
private class CCAttributePropertyDescriptor extends PropertyDescriptor {
public CCAttributePropertyDescriptor(String propertyName, Method readMethod, Method writeMethod) throws IntrospectionException {
super(propertyName, readMethod, writeMethod);
}
@Override
public Object getValue(String attributeName) {
Object result = super.getValue(attributeName);
if ("type".equals(attributeName)) {
if ((null != result) && !(result instanceof Class)) {
FacesContext context = FacesContext.getCurrentInstance();
ELContext elContext = context.getELContext();
String classStr = (String) ((ValueExpression)result).getValue(elContext);
if (null != classStr) {
try {
result = ReflectionUtil.forName(classStr);
this.setValue(attributeName, result);
} catch (ClassNotFoundException ex) {
classStr = "java.lang." + classStr;
boolean throwException = false;
try {
result = ReflectionUtil.forName(classStr);
this.setValue(attributeName, result);
} catch (ClassNotFoundException ex2) {
throwException = true;
}
if (throwException) {
String message = "Unable to obtain class for " + classStr;
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.log(Level.INFO, message, ex);
}
throw new TagAttributeException(tag, name, message, ex);
}
}
}
}
}
return result;
}
}
}