/**
*
* Copyright 2004 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 org.apache.geronimo.messaging.interceptors;
import org.apache.geronimo.messaging.Msg;
import org.apache.geronimo.messaging.MsgHeader;
/**
* Counterpart of HeaderInInterceptor.
*
* @version $Rev: 46019 $ $Date: 2004-09-14 04:56:06 -0500 (Tue, 14 Sep 2004) $
*/
public class HeaderOutInterceptor
implements MsgOutInterceptor
{
/**
* Key of the header to insert.
*/
private final Object key;
/**
* Value of the header to insert.
*/
private final Object value;
/**
* Next interceptor.
*/
private final MsgOutInterceptor next;
/**
* Creates an outbound interceptor, which adds a header having the key
* aKey and the value aValue.
*
* @param aKey Header key.
* @param aValue Header value.
* @param aNext Interceptor towards which the Msgs are pushed.
*/
public HeaderOutInterceptor(Object aKey, Object aValue,
MsgOutInterceptor aNext) {
if ( null == aKey ) {
throw new IllegalArgumentException("Key is required.");
} else if ( null == aValue ) {
throw new IllegalArgumentException("Value is required.");
} else if ( null == aNext ) {
throw new IllegalArgumentException("Next interceptor is required.");
}
key = aKey;
value = aValue;
next = aNext;
}
/**
* Adds an header to the Msg and pushes it to the next interceptor.
*
* @param aMsg Msg to process.
*/
public void push(Msg aMsg) {
MsgHeader header = aMsg.getHeader();
header.addHeader(key, value);
next.push(aMsg);
}
}