/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002-2006
* Sleepycat Software. All rights reserved.
*
* $Id: NameLN.java,v 1.1 2006/05/06 09:00:12 ckaestne Exp $
*/
package com.sleepycat.je.tree;
import java.nio.ByteBuffer;
import com.sleepycat.je.dbi.DatabaseId;
import com.sleepycat.je.log.LogEntryType;
import com.sleepycat.je.log.LogException;
import com.sleepycat.je.log.LogUtils;
/**
* A NameLN represents a Leaf Node in the name->database id mapping tree.
*/
public final class NameLN extends LN {
private static final String BEGIN_TAG = "<nameLN>";
private static final String END_TAG = "</nameLN>";
private DatabaseId id;
private boolean deleted;
/**
* In the ideal world, we'd have a base LN class so that this NameLN
* doesn't have a superfluous data field, but we want to optimize the LN
* class for size and speed right now.
*/
public NameLN(DatabaseId id) {
super(new byte[0]);
this.id = id;
deleted = false;
}
/**
* Create an empty NameLN, to be filled in from the log.
*/
public NameLN() {
super();
id = new DatabaseId();
}
public boolean isDeleted() {
return deleted;
}
void makeDeleted() {
deleted = true;
}
public DatabaseId getId() {
return id;
}
public void setId(DatabaseId id) {
this.id = id;
}
/*
* Dumping
*/
public String toString() {
return dumpString(0, true);
}
public String beginTag() {
return BEGIN_TAG;
}
public String endTag() {
return END_TAG;
}
public String dumpString(int nSpaces, boolean dumpTags) {
StringBuffer sb = new StringBuffer();
sb.append(super.dumpString(nSpaces, dumpTags));
sb.append('\n');
sb.append(TreeUtils.indent(nSpaces));
sb.append("<deleted val=\"").append(Boolean.toString(deleted));
sb.append("\">");
sb.append('\n');
sb.append(TreeUtils.indent(nSpaces));
sb.append("<id val=\"").append(id);
sb.append("\">");
sb.append('\n');
return sb.toString();
}
/*
* Logging
*/
/**
* Log type for transactional entries.
*/
protected LogEntryType getTransactionalLogType() {
return LogEntryType.LOG_NAMELN_TRANSACTIONAL;
}
/**
* @see LN#getLogType
*/
public LogEntryType getLogType() {
return LogEntryType.LOG_NAMELN;
}
/**
* @see LN#getLogSize
*/
public int getLogSize() {
return
super.getLogSize() + // superclass
id.getLogSize() + // id
LogUtils.getBooleanLogSize(); // deleted flag
}
/**
* @see LN#writeToLog
*/
public void writeToLog(ByteBuffer logBuffer) {
/* Ask ancestors to write to log. */
super.writeToLog(logBuffer); // super class
id.writeToLog(logBuffer); // id
LogUtils.writeBoolean(logBuffer, deleted); // deleted flag
}
/**
* @see LN#readFromLog
*/
public void readFromLog(ByteBuffer itemBuffer, byte entryTypeVersion)
throws LogException {
super.readFromLog(itemBuffer, entryTypeVersion); // super class
id.readFromLog(itemBuffer, entryTypeVersion); // id
deleted = LogUtils.readBoolean(itemBuffer); // deleted flag
}
/**
* Dump additional fields. Done this way so the additional info can be
* within the XML tags defining the dumped log entry.
*/
protected void dumpLogAdditional(StringBuffer sb, boolean verbose) {
id.dumpLog(sb, true);
}
}