com.sun.jersey.spi.container.CachedEntityContainerRequest Maven / Gradle / Ivy
Show all versions of jersey-bundle Show documentation
/*
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. 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://jersey.dev.java.net/CDDL+GPL.html
* or jersey/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 jersey/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [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.jersey.spi.container;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
/**
* A cached entity in-bound HTTP request that caches the entity instance
* obtained from the adapted container request.
*
* A filter may utilize this class if it requires an entity of a specific type
* and that same type will also be utilized by a resource method.
*
* @author [email protected]
*/
public class CachedEntityContainerRequest extends AdaptingContainerRequest {
Object entity;
public CachedEntityContainerRequest(ContainerRequest acr) {
super(acr);
}
/**
* Get the entity or a cached instance.
*
* @return If called for the first time obtain the entity from the adapting
* container request and cache the instance. If called for second or
* subsequent time return the cached instance.
* @throws ClassCastException if the cached entity cannot be cast to the
* type requested.
*/
@Override
public T getEntity(Class type) throws ClassCastException {
if (entity == null) {
T t = acr.getEntity(type);
entity = t;
return t;
} else {
return type.cast(entity);
}
}
/**
* Get the entity or a cached instance.
*
* @return If called for the first time obtain the entity from the adapting
* container request and cache the instance. If called for second or
* subsequent time return the cached instance.
* @throws ClassCastException if the cached entity cannot be cast to the
* type requested.
*/
@Override
public T getEntity(Class type, Type genericType, Annotation[] as) throws ClassCastException {
if (entity == null) {
T t = acr.getEntity(type, genericType, as);
entity = t;
return t;
} else {
return type.cast(entity);
}
}
}