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/*
* 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 io.milton.zsync;
import java.util.Comparator;
/**
* An object representing a single match between a block on the client file and a block
* on the server file. The Pair (localOffset, remoteBlock) means that the block in the local file
* at byte localOffset is identical to block number remoteBlock in
* the remote file.
*
* @author Nick
*/
public class OffsetPair{
/**
* The byte offset of the block in the local file
*/
public final long localOffset;
/**
* The index of the block in the remote file
*/
public final long remoteBlock;
/**
* Constructs an immutable OffsetPair.
*
* @param offset The start byte of the local block
* @param blockIndex The index of the remote block
*/
public OffsetPair(long offset, long blockIndex){
localOffset = offset;
remoteBlock = blockIndex;
}
/**
* A Comparator used to sort a list of OffsetPairs by their remoteBlock values.
*
* @author Nick
*
*/
static class RemoteSort implements Comparator{
@Override
public int compare(OffsetPair o1, OffsetPair o2) {
return (int) (o1.remoteBlock - o2.remoteBlock);
}
}
/**
* A Comparator used to sort a list of OffsetPairs by their localOffset values.
*
* @author Nick
*
*/
static class LocalSort implements Comparator{
@Override
public int compare(OffsetPair o1, OffsetPair o2) {
return (int) (o1.localOffset - o2.localOffset);
}
}
}