/*
* Syncany, www.syncany.org
* Copyright (C) 2011-2015 Philipp C. Heckel <philipp.heckel@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.syncany.database;
import java.util.ArrayList;
import java.util.List;
import org.syncany.database.ChunkEntry.ChunkChecksum;
/**
* The multichunk entry represents the chunk container in which a set of
* {@link ChunkEntry}s is stored. On a file, level, a multichunk is represented
* by a file (container format) and chunks are added to this file.
*
* <p>A multichunk is identified by a unique identifier (random, not a checksum),
* and contains references to {@link ChunkEntry}s.
*
* @author Philipp C. Heckel <philipp.heckel@gmail.com>
*/
public class MultiChunkEntry {
private static final byte MULTICHUNK_ID_LENGTH = 20;
private MultiChunkId id;
private long size;
private List<ChunkChecksum> chunks;
public MultiChunkEntry(MultiChunkId id, long size) {
this.id = id;
this.size = size;
this.chunks = new ArrayList<ChunkChecksum>();
}
public void addChunk(ChunkChecksum chunk) {
chunks.add(chunk);
}
public MultiChunkId getId() {
return id;
}
public void setId(MultiChunkId id) {
this.id = id;
}
public List<ChunkChecksum> getChunks() {
return chunks;
}
public long getSize() {
return size;
}
public void setSize(long size) {
this.size = size;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((chunks == null) ? 0 : chunks.hashCode());
result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof MultiChunkEntry)) {
return false;
}
MultiChunkEntry other = (MultiChunkEntry) obj;
if (chunks == null) {
if (other.chunks != null) {
return false;
}
}
else if (!chunks.equals(other.chunks)) {
return false;
}
if (id == null) {
if (other.id != null) {
return false;
}
}
else if (!id.equals(other.id)) {
return false;
}
return true;
}
@Override
public String toString() {
return "MultiChunkEntry [id=" + id + ", chunks=" + chunks + "]";
}
public static class MultiChunkId extends ObjectId {
public MultiChunkId(byte[] array) {
super(array);
}
public static MultiChunkId secureRandomMultiChunkId() {
return new MultiChunkId(ObjectId.secureRandomBytes(MULTICHUNK_ID_LENGTH));
}
public static MultiChunkId parseMultiChunkId(String s) {
return new MultiChunkId(ObjectId.parseObjectId(s));
}
}
}