com.arangodb.vst.internal.Chunk Maven / Gradle / Ivy
/*
* DISCLAIMER
*
* Copyright 2016 ArangoDB GmbH, Cologne, Germany
*
* 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.
*
* Copyright holder is ArangoDB GmbH, Cologne, Germany
*/
package com.arangodb.vst.internal;
/**
* @author Mark Vollmary
*/
public class Chunk {
private final long messageId;
private final long messageLength;
private final int chunkX;
private final int contentOffset;
private final int contentLength;
public Chunk(final long messageId, final int chunkX, final long messageLength, final int contentOffset,
final int contentLength) {
this.messageId = messageId;
this.chunkX = chunkX;
this.messageLength = messageLength;
this.contentOffset = contentOffset;
this.contentLength = contentLength;
}
public Chunk(final long messageId, final int chunkIndex, final int numberOfChunks, final long messageLength,
final int contentOffset, final int contentLength) {
this(messageId, chunkX(chunkIndex, numberOfChunks), messageLength, contentOffset, contentLength);
}
private static int chunkX(final int chunkIndex, final int numberOfChunks) {
int chunkX;
if (numberOfChunks == 1) {
chunkX = 3;// last byte: 0000 0011
} else if (chunkIndex == 0) {
chunkX = (numberOfChunks << 1) + 1;
} else {
chunkX = chunkIndex << 1;
}
return chunkX;
}
public long getMessageId() {
return messageId;
}
public long getMessageLength() {
return messageLength;
}
public boolean isFirstChunk() {
return 1 == (chunkX & 0x1);
}
public int getChunk() {
return chunkX >> 1;
}
public int getChunkX() {
return chunkX;
}
public int getContentOffset() {
return contentOffset;
}
public int getContentLength() {
return contentLength;
}
}