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/*
* @(#)BtreeDictParameters.java 1.15 06/10/30
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @(#) BtreeDictParameters.java 1.5 - last change made 04/01/98
*/
package com.sun.java.help.search;
import java.net.URL;
import java.net.URLConnection;
import java.util.StringTokenizer;
import java.io.*;
/**
*
* @version 1.5 04/01/98
* @author Jacek R. Ambroziak
* @author Roger D. Brinkley
* @author Eduardo Pelegri-Llopart
*/
class BtreeDictParameters extends BlockManagerParameters
{
private int id1;
private String dirName;
// some form of this is needed for starting new DBs
public BtreeDictParameters(URL fileName, int blockSize, int root,
int freeID)
{
super(fileName, blockSize, root);
id1 = freeID;
}
public BtreeDictParameters(Schema schema, String partName)
throws Exception
{
super(schema, partName);
}
public boolean readState()
{
if (super.readState())
{
setFreeID(integerParameter("id1"));
return true;
}
else
return false;
}
public void writeState() {
}
public int getFreeID() {
return id1;
}
public final void setFreeID(int id) {
id1 = id;
}
private void setDirName(String dirName) {
this.dirName = dirName;
}
public static BtreeDictParameters create(URL dirName)
{
try {
URL url = new URL(dirName, "TMAP");
BtreeDictParameters bdp = null;
// new BtreeDictParameters(url, 2048, 0, 1);
bdp.setDirName(dirName.getFile());
return bdp;
} catch (java.net.MalformedURLException e) {
System.out.println ("Couldn't create " + dirName + File.separator + "TMAP");
}
return null;
}
public static BtreeDictParameters read(String dir, URL hsBase)
throws Exception
{
URL baseURL=null, url, tmapURL=null;
URLConnection connect;
BufferedReader in;
File file;
int blockSize = -1;
int rootPosition = -1;
int freeID = -1;
if (hsBase == null) {
file = new File(dir);
if (file.exists()) {
// On Win32 we need to convert all "\" to "/"
if (File.separatorChar != '/') {
dir = dir.replace(File.separatorChar, '/');
}
// Make sure the last character is a file separator
if (dir.lastIndexOf(File.separatorChar)
!= dir.length() - 1) {
dir = dir.concat(File.separator);
}
debug ("file:" + dir);
// Use a file protocol
baseURL = new URL("file", "", dir);
} else {
// Assume that some protocol was specified and try it
baseURL = new URL(dir);
}
}
// Read the SCHEMA data
if (hsBase != null) {
url = new URL(hsBase, dir + "/SCHEMA");
} else {
url = new URL(baseURL, "SCHEMA");
}
connect = url.openConnection();
in = new BufferedReader
(new InputStreamReader(connect.getInputStream()));
// This needs to be replaced with our XML Parser
String line;
do {
line = in.readLine();
}
while (!line.startsWith("TMAP"));
in.close();
StringTokenizer tokens = new StringTokenizer(line, " =");
tokens.nextToken(); // skip over 'TMAP'
while (tokens.hasMoreTokens())
{
String token = tokens.nextToken();
if (token.equals("bs"))
blockSize = Integer.parseInt(tokens.nextToken());
else if (token.equals("rt"))
rootPosition = Integer.parseInt(tokens.nextToken());
else if (token.equals("id1"))
freeID = Integer.parseInt(tokens.nextToken());
}
if (hsBase != null) {
tmapURL = new URL(hsBase, dir + "/TMAP");
} else {
tmapURL = new URL(baseURL, "TMAP");
}
BtreeDictParameters bdp = null;
// new BtreeDictParameters(tmapURL, blockSize, rootPosition, freeID);
if (hsBase == null) {
bdp.setDirName(Utilities.URLDecoder(baseURL.getFile()));
}
return bdp;
}
public void updateSchema() {
super.updateSchema("id1="+id1+" id2=1");
}
public void write() throws java.io.IOException
{
FileWriter out = new FileWriter(dirName + "/SCHEMA");
out.write("JavaSearch 1.0\n");
out.write("TMAP bs=2048 rt="+root+" fl=-1 id1="+id1+" id2=1\n");
out.close();
}
/**
* For printf debugging.
*/
private static boolean debugFlag = false;
private static void debug(String str) {
if( debugFlag ) {
System.out.println("BtreeDictParamters: " + str);
}
}
}
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