org.elasticsearch.common.io.stream.HandlesStreamInput Maven / Gradle / Ivy
/*
* Licensed to Elasticsearch 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.common.io.stream;
import com.carrotsearch.hppc.IntObjectOpenHashMap;
import org.elasticsearch.common.text.Text;
import java.io.IOException;
/**
*
*/
public class HandlesStreamInput extends AdapterStreamInput {
private final IntObjectOpenHashMap handles = new IntObjectOpenHashMap();
private final IntObjectOpenHashMap handlesText = new IntObjectOpenHashMap();
HandlesStreamInput() {
super();
}
public HandlesStreamInput(StreamInput in) {
super(in);
}
@Override
public String readSharedString() throws IOException {
byte b = in.readByte();
if (b == 0) {
// full string with handle
int handle = in.readVInt();
String s = in.readString();
handles.put(handle, s);
return s;
} else if (b == 1) {
return handles.get(in.readVInt());
} else {
throw new IOException("Expected handle header, got [" + b + "]");
}
}
@Override
public String readString() throws IOException {
return in.readString();
}
@Override
public Text readSharedText() throws IOException {
byte b = in.readByte();
if (b == 0) {
int handle = in.readVInt();
Text s = in.readText();
handlesText.put(handle, s);
return s;
} else if (b == 1) {
return handlesText.get(in.readVInt());
} else if (b == 2) {
return in.readText();
} else {
throw new IOException("Expected handle header, got [" + b + "]");
}
}
@Override
public void reset() throws IOException {
super.reset();
cleanHandles();
}
public void reset(StreamInput in) {
super.reset(in);
cleanHandles();
}
public void cleanHandles() {
handles.clear();
handlesText.clear();
}
}