org.apache.catalina.core.ApplicationResponse Maven / Gradle / Ivy
/*
* 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.catalina.core;
import java.util.Locale;
import javax.servlet.ServletResponse;
import javax.servlet.ServletResponseWrapper;
/**
* Wrapper around a javax.servlet.ServletResponse
* that transforms an application response object (which might be the original
* one passed to a servlet, or might be based on the 2.3
* javax.servlet.ServletResponseWrapper class)
* back into an internal org.apache.catalina.Response.
*
* WARNING: Due to Java's lack of support for multiple
* inheritance, all of the logic in ApplicationResponse is
* duplicated in ApplicationHttpResponse. Make sure that you
* keep these two classes in synchronization when making changes!
*
* @author Craig R. McClanahan
*/
class ApplicationResponse extends ServletResponseWrapper {
// ----------------------------------------------------------- Constructors
/**
* Construct a new wrapped response around the specified servlet response.
*
* @param response The servlet response being wrapped
* @param included true if this response is being processed
* by a RequestDispatcher.include() call
*/
public ApplicationResponse(ServletResponse response, boolean included) {
super(response);
setIncluded(included);
}
// ----------------------------------------------------- Instance Variables
/**
* Is this wrapped response the subject of an include()
* call?
*/
protected boolean included = false;
// ------------------------------------------------ ServletResponse Methods
/**
* Disallow reset() calls on a included response.
*
* @exception IllegalStateException if the response has already
* been committed
*/
@Override
public void reset() {
// If already committed, the wrapped response will throw ISE
if (!included || getResponse().isCommitted())
getResponse().reset();
}
/**
* Disallow setContentLength(int) calls on an included
* response.
*
* @param len The new content length
*/
@Override
public void setContentLength(int len) {
if (!included)
getResponse().setContentLength(len);
}
/**
* Disallow setContentLengthLong(long) calls on an included
* response.
*
* @param len The new content length
*/
@Override
public void setContentLengthLong(long len) {
if (!included)
getResponse().setContentLengthLong(len);
}
/**
* Disallow setContentType() calls on an included response.
*
* @param type The new content type
*/
@Override
public void setContentType(String type) {
if (!included)
getResponse().setContentType(type);
}
/**
* Ignore setLocale() calls on an included response.
*
* @param loc The new locale
*/
@Override
public void setLocale(Locale loc) {
if (!included)
getResponse().setLocale(loc);
}
/**
* Ignore setBufferSize() calls on an included response.
*
* @param size The buffer size
*/
@Override
public void setBufferSize(int size) {
if (!included)
getResponse().setBufferSize(size);
}
// ----------------------------------------- ServletResponseWrapper Methods
/**
* Set the response that we are wrapping.
*
* @param response The new wrapped response
*/
@Override
public void setResponse(ServletResponse response) {
super.setResponse(response);
}
// -------------------------------------------------------- Package Methods
/**
* Set the included flag for this response.
*
* @param included The new included flag
*/
void setIncluded(boolean included) {
this.included = included;
}
}