/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.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; version 2 of the License.
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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.bigdata.journal;
/**
* Interface for access to the snapshot metadata.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
*/
public interface ICommitTimeEntry {
/**
* Return the bytes on the disk for the snapshot file.
*/
public long sizeOnDisk();
/**
* The commit counter associated with the index entry.
*/
public long getCommitCounter();
/**
* The commit time associated with the index entry.
*/
public long getCommitTime();
/**
* Return the {@link IRootBlockView} of the snapshot.
*/
public IRootBlockView getRootBlock();
//public static class SnapshotRecord implements ISnapshotRecord,
// Externalizable {
//
// private static final int VERSION0 = 0x0;
//
// private static final int currentVersion = VERSION0;
//
// /**
// * Note: This is NOT {@link Serializable}.
// */
// private IRootBlockView rootBlock;
//
// private long sizeOnDisk;
//
// /**
// * De-serialization constructor.
// */
// public SnapshotRecord() {
// }
//
// public SnapshotRecord(final IRootBlockView rootBlock,
// final long sizeOnDisk) {
//
// if (rootBlock == null)
// throw new IllegalArgumentException();
//
// if (sizeOnDisk < 0L)
// throw new IllegalArgumentException();
//
// this.rootBlock = rootBlock;
//
// this.sizeOnDisk = sizeOnDisk;
//
// }
//
// @Override
// public long sizeOnDisk() {
// return sizeOnDisk;
// }
//
// @Override
// public IRootBlockView getRootBlock() {
// return rootBlock;
// }
//
// @Override
// public boolean equals(final Object o) {
// if (this == o)
// return true;
// if (!(o instanceof ISnapshotRecord))
// return false;
// final ISnapshotRecord t = (ISnapshotRecord) o;
// if (sizeOnDisk() != t.sizeOnDisk())
// return false;
// if (!getRootBlock().equals(t.getRootBlock()))
// return false;
// return true;
// }
//
// @Override
// public int hashCode() {
// return getRootBlock().hashCode();
// }
//
// @Override
// public void writeExternal(final ObjectOutput out) throws IOException {
//
// out.writeInt(currentVersion);
//
// final byte[] a = BytesUtil.getBytes(rootBlock.asReadOnlyBuffer());
//
// final int sizeOfRootBlock = a.length;
//
// out.writeInt(sizeOfRootBlock);
//
// out.write(a, 0, sizeOfRootBlock);
//
// out.writeLong(sizeOnDisk);
//
// }
//
// @Override
// public void readExternal(final ObjectInput in) throws IOException,
// ClassNotFoundException {
//
// final int version = in.readInt();
//
// switch (version) {
// case VERSION0:
// break;
// default:
// throw new IOException("Unknown version: " + version);
// }
//
// final int sizeOfRootBlock = in.readInt();
//
// final byte[] a = new byte[sizeOfRootBlock];
//
// in.readFully(a, 0, sizeOfRootBlock);
//
// rootBlock = new RootBlockView(false/* rootBlock0 */,
// ByteBuffer.wrap(a), ChecksumUtility.getCHK());
//
// sizeOnDisk = in.readLong();
//
// }
//
//} // SnapshotRecord
//
///**
// * Encapsulates key and value formation.
// *
// * @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
// */
//static protected class TupleSerializer extends
// DefaultTupleSerializer<Long, ISnapshotRecord> {
//
// /**
// *
// */
// private static final long serialVersionUID = -2851852959439807542L;
//
// /**
// * De-serialization ctor.
// */
// public TupleSerializer() {
//
// super();
//
// }
//
// /**
// * Ctor when creating a new instance.
// *
// * @param keyBuilderFactory
// */
// public TupleSerializer(final IKeyBuilderFactory keyBuilderFactory) {
//
// super(keyBuilderFactory);
//
// }
//
// /**
// * Decodes the key as a commit time.
// */
// @Override
// @SuppressWarnings("rawtypes")
// public Long deserializeKey(final ITuple tuple) {
//
// return KeyBuilder
// .decodeLong(tuple.getKeyBuffer().array(), 0/* offset */);
//
// }
//
// /**
// * The initial version (no additional persistent state).
// */
// private final static transient byte VERSION0 = 0;
//
// /**
// * The current version.
// */
// private final static transient byte VERSION = VERSION0;
//
// public void readExternal(final ObjectInput in) throws IOException,
// ClassNotFoundException {
//
// super.readExternal(in);
//
// final byte version = in.readByte();
//
// switch (version) {
// case VERSION0:
// break;
// default:
// throw new UnsupportedOperationException("Unknown version: "
// + version);
// }
//
// }
//
// public void writeExternal(final ObjectOutput out) throws IOException {
//
// super.writeExternal(out);
//
// out.writeByte(VERSION);
//
// }
}