TreeLocation.java

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2002-2006
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: TreeLocation.java,v 1.1 2006/05/06 09:00:13 ckaestne Exp $
 */

package com.sleepycat.je.tree;

import com.sleepycat.je.utilint.DbLsn;

/*
 * TreeLocation is a cursor like object that keeps track of a location
 * in a tree. It's used during recovery.
 */
public class TreeLocation {
    public BIN bin;         // parent BIN for the target LN
    public int index;       // index of where the LN is or should go
    public byte[] lnKey;    // the key that represents this LN in this BIN
    public long childLsn = DbLsn.NULL_LSN; // current LSN value in that slot.

    public void reset() {
        bin = null;
        index = -1;
        lnKey = null;
        childLsn = DbLsn.NULL_LSN;
    }

    public String toString() {
	StringBuffer sb = new StringBuffer("<TreeLocation bin=\"");
	if (bin == null) {
	    sb.append("null");
	} else {
	    sb.append(bin.getNodeId());
	}
	sb.append("\" index=\"");
	sb.append(index);
	sb.append("\" lnKey=\"");
	sb.append(Key.dumpString(lnKey,0));
	sb.append("\" childLsn=\"");
	sb.append(DbLsn.toString(childLsn));
	sb.append("\">");
	return sb.toString();
    }
}