org.elasticsearch.transport.TransportResponse Maven / Gradle / Ivy
/*
* Licensed to ElasticSearch and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. ElasticSearch 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.elasticsearch.transport;
import com.google.common.collect.Maps;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Streamable;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
*/
public abstract class TransportResponse implements Streamable {
public static class Empty extends TransportResponse {
public static final Empty INSTANCE = new Empty();
public Empty() {
super();
}
public Empty(TransportResponse request) {
super(request);
}
}
private Map headers;
protected TransportResponse() {
}
protected TransportResponse(TransportResponse request) {
// create a new copy of the headers, since we are creating a new request which might have
// its headers changed in the context of that specific request
if (request.getHeaders() != null) {
this.headers = new HashMap(request.getHeaders());
}
}
@SuppressWarnings("unchecked")
public final TransportResponse putHeader(String key, Object value) {
if (headers == null) {
headers = Maps.newHashMap();
}
headers.put(key, value);
return this;
}
@SuppressWarnings("unchecked")
public final V getHeader(String key) {
if (headers == null) {
return null;
}
return (V) headers.get(key);
}
public Map getHeaders() {
return this.headers;
}
@Override
public void readFrom(StreamInput in) throws IOException {
if (in.readBoolean()) {
headers = in.readMap();
}
}
@Override
public void writeTo(StreamOutput out) throws IOException {
if (headers == null) {
out.writeBoolean(false);
} else {
out.writeBoolean(true);
out.writeMap(headers);
}
}
}