org.elasticsearch.common.lucene.store.ChecksumIndexOutput Maven / Gradle / Ivy
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* 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.lucene.store;
import org.apache.lucene.store.IndexOutput;
import java.io.IOException;
import java.util.zip.Checksum;
/**
*/
public class ChecksumIndexOutput extends IndexOutput {
private final IndexOutput out;
private final Checksum digest;
public ChecksumIndexOutput(IndexOutput out, Checksum digest) {
this.out = out;
this.digest = digest;
}
public Checksum digest() {
return digest;
}
@Override
public void writeByte(byte b) throws IOException {
out.writeByte(b);
digest.update(b);
}
@Override
public void setLength(long length) throws IOException {
out.setLength(length);
}
// don't override copyBytes, since we need to read it and compute it
// @Override
// public void copyBytes(DataInput input, long numBytes) throws IOException {
// super.copyBytes(input, numBytes);
// }
@Override
public String toString() {
return out.toString();
}
@Override
public void writeBytes(byte[] b, int offset, int length) throws IOException {
out.writeBytes(b, offset, length);
digest.update(b, offset, length);
}
@Override
public void flush() throws IOException {
out.flush();
}
@Override
public void close() throws IOException {
out.close();
}
@Override
public long getFilePointer() {
return out.getFilePointer();
}
@Override
public void seek(long pos) throws IOException {
out.seek(pos);
}
@Override
public long length() throws IOException {
return out.length();
}
}