/*
* 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 org.apache.shale.test.el;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import javax.el.ELContext;
import javax.el.PropertyNotFoundException;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
/**
* <p><code>ELResolver</code> implementation that accesses scoped variables
* in the current request context. See the JSF 1.2 Specification, section
* 5.6.2.7, for requirements implemented by this class.</p>
*
* @since 1.0.4
*/
public class FacesScopedAttributeELResolver extends AbstractELResolver {
/**
* <p>Return the most general type this resolver accepts for the
* <code>property</code> argument.</p>
*/
public Class getCommonPropertyType(ELContext context, Object base) {
if (base != null) {
return null;
} else {
return String.class;
}
}
/**
* <p>Return an <code>Iterator</code> over the attributes that this
* resolver knows how to deal with.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
*/
public Iterator getFeatureDescriptors(ELContext context, Object base) {
if (base != null) {
return null;
}
// Create the variables we will need
FacesContext fcontext = (FacesContext) context.getContext(FacesContext.class);
ExternalContext econtext = fcontext.getExternalContext();
List descriptors = new ArrayList();
Map map = null;
Set set = null;
Iterator items = null;
String key = null;
Object value = null;
// Add feature descriptors for request scoped attributes
set = econtext.getRequestMap().entrySet();
items = set.iterator();
while (items.hasNext()) {
Entry item = (Entry) items.next();
key = (String) item.getKey();
value = item.getValue();
descriptors.add(descriptor(key, key, "Request Scope Attribute " + key,
false, false, true, value.getClass(), true));
}
// Add feature descriptors for session scoped attributes
set = econtext.getSessionMap().entrySet();
items = set.iterator();
while (items.hasNext()) {
Entry item = (Entry) items.next();
key = (String) item.getKey();
value = item.getValue();
descriptors.add(descriptor(key, key, "Session Scope Attribute " + key,
false, false, true, value.getClass(), true));
}
// Add feature descriptors for application scoped attributes
set = econtext.getApplicationMap().entrySet();
items = set.iterator();
while (items.hasNext()) {
Entry item = (Entry) items.next();
key = (String) item.getKey();
value = item.getValue();
descriptors.add(descriptor(key, key, "Application Scope Attribute " + key,
false, false, true, value.getClass(), true));
}
// Return the accumulated descriptors
return descriptors.iterator();
}
/**
* <p>Return the Java type of the specified property.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
* (must be null because we are evaluating a top level variable)
* @param property Property name to be accessed
*/
public Class getType(ELContext context, Object base, Object property) {
if (base != null) {
return null;
}
if (property == null) {
throw new PropertyNotFoundException("No property specified");
}
context.setPropertyResolved(true);
return Object.class;
}
/**
* <p>Return an existing scoped object for the specified name (if any);
* otherwise, return <code>null</code>.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
* (must be null because we are evaluating a top level variable)
* @param property Property name to be accessed
*/
public Object getValue(ELContext context, Object base, Object property) {
if (base != null) {
return null;
}
if (property == null) {
throw new PropertyNotFoundException("No property specified");
}
FacesContext fcontext = (FacesContext) context.getContext(FacesContext.class);
ExternalContext econtext = fcontext.getExternalContext();
Object value = null;
value = econtext.getRequestMap().get(property);
if (value != null) {
context.setPropertyResolved(true);
return value;
}
value = econtext.getSessionMap().get(property);
if (value != null) {
context.setPropertyResolved(true);
return value;
}
value = econtext.getApplicationMap().get(property);
if (value != null) {
context.setPropertyResolved(true);
return value;
}
return null;
}
/**
* <p>Return <code>true</code> if the specified property is read only.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
* (must be null because we are evaluating a top level variable)
* @param property Property name to be accessed
*/
public boolean isReadOnly(ELContext context, Object base, Object property) {
if (base == null) {
context.setPropertyResolved(true);
return false;
}
return false;
}
/**
* <p>Set the value of a scoped object for the specified name.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
* (must be null because we are evaluating a top level variable)
* @param property Property name to be accessed
* @param value New value to be set
*/
public void setValue(ELContext context, Object base, Object property, Object value) {
if (base != null) {
return;
}
if (property == null) {
throw new PropertyNotFoundException("No property specified");
}
context.setPropertyResolved(true);
String key = property.toString();
Object result = null;
FacesContext fcontext = (FacesContext) context.getContext(FacesContext.class);
ExternalContext econtext = fcontext.getExternalContext();
if (econtext.getRequestMap().containsKey(property)) {
econtext.getRequestMap().put(key, value);
} else if (econtext.getSessionMap().containsKey(property)) {
econtext.getSessionMap().put(key, value);
} else if (econtext.getApplicationMap().containsKey(property)) {
econtext.getApplicationMap().put(key, value);
} else {
econtext.getRequestMap().put(key, value);
}
}
}