/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002, 2011 Oracle and/or its affiliates. All rights reserved.
*
*/
package com.sleepycat.je.tree.dupConvert;
import java.nio.ByteBuffer;
import com.sleepycat.je.EnvironmentFailureException;
import com.sleepycat.je.dbi.DatabaseId;
import com.sleepycat.je.log.LogUtils;
import com.sleepycat.je.log.Loggable;
import com.sleepycat.je.tree.Key;
/**
* INDupDeleteInfo encapsulates the information logged about the removal of a
* child from a duplicate IN during IN compression.
*
* Obsolete in log version 8, only used by DupConvert and some log readers.
*/
public class INDupDeleteInfo implements Loggable {
private long deletedNodeId;
private byte[] deletedMainKey;
private byte[] deletedDupKey;
private final DatabaseId dbId;
private boolean dupRootDeletion;
/**
* Used by logging system only.
*/
public INDupDeleteInfo() {
dbId = new DatabaseId();
}
/*
* Accessors.
*/
public long getDeletedNodeId() {
return deletedNodeId;
}
public byte[] getDeletedMainKey() {
return deletedMainKey;
}
public byte[] getDeletedDupKey() {
return deletedDupKey;
}
public DatabaseId getDatabaseId() {
return dbId;
}
/**
* Returns true if we are certain that this log entry reflects deletion of
* a DIN root. Returns false if it may or may not be a DIN root. [#18663]
*/
public boolean isDupRootDeletion() {
return dupRootDeletion;
}
/*
* Logging support for writing.
*/
/**
* @see Loggable#getLogSize
*/
public int getLogSize() {
throw EnvironmentFailureException.unexpectedState();
}
/**
* @see Loggable#writeToLog
*/
public void writeToLog(ByteBuffer logBuffer) {
throw EnvironmentFailureException.unexpectedState();
}
/**
* @see Loggable#readFromLog
*/
public void readFromLog(ByteBuffer itemBuffer, int entryVersion) {
boolean unpacked = (entryVersion < 6);
deletedNodeId = LogUtils.readLong(itemBuffer, unpacked);
deletedMainKey =
LogUtils.readByteArray(itemBuffer, unpacked);
deletedDupKey = LogUtils.readByteArray(itemBuffer, unpacked);
dbId.readFromLog(itemBuffer, entryVersion);
/*
* This log entry is only logged for dup root deletion, starting in
* JE 2.1. We can't distinguish JE 2.1 through 3.2 using the log
* version, so we are only certain that this is a dup root deletion for
* version 6 (JE 3.3) and above. [#18663]
*/
dupRootDeletion = (entryVersion >= 6);
}
/**
* @see Loggable#dumpLog
*/
public void dumpLog(StringBuilder sb, boolean verbose) {
sb.append("<INDupDeleteEntry node=\"").append(deletedNodeId);
sb.append("\">");
sb.append(Key.dumpString(deletedMainKey, 0));
sb.append(Key.dumpString(deletedDupKey, 0));
dbId.dumpLog(sb, verbose);
sb.append("</INDupDeleteEntry>");
}
/**
* @see Loggable#getTransactionId
*/
public long getTransactionId() {
return 0;
}
/**
* @see Loggable#logicalEquals
* Always return false, this item should never be compared.
*/
public boolean logicalEquals(Loggable other) {
return false;
}
}