com.wwm.postcode.PostZonConvertor Maven / Gradle / Ivy
/******************************************************************************
* Copyright (c) 2005-2008 Whirlwind Match Limited. All rights reserved.
*
* This is open source software; you can use, redistribute and/or modify
* it under the terms of the Open Software Licence v 3.0 as published by the
* Open Source Initiative.
*
* You should have received a copy of the Open Software Licence along with this
* application. if not, contact the Open Source Initiative (www.opensource.org)
*****************************************************************************/
package com.wwm.postcode;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.util.TreeMap;
import org.slf4j.Logger;
import java.util.zip.GZIPInputStream;
import com.wwm.db.core.Settings;
import com.wwm.postcode.PostcodeConvertor.LostDbConnection;
import com.wwm.util.StringUtils;
/**
* Old version with high memory footprint
* @deprecated Now use efficient version supplied by PostcodeService.
*/
@Deprecated
public class PostZonConvertor {
private final Logger log;
private static final String fullFile = Settings.getInstance().getPostcodeRoot() + File.separatorChar + PostZonImporter.postzonDataDir;
// Future use
// class Cluster {
// final static float offsetMultiplier = 0.002f;
// float latOrigin;
// float lonOrigin;
// String[] town;
// char[] code;
// byte latOffset[];
// byte lonOffset[];
// byte townOffset[];
//
// void test() {
// synchronized (code) {}
// }
// }
//HashMap longCache = new HashMap();
public PostZonConvertor(Logger log) {
this.log = log;
log.info("Starting up PostcodeConvertor");
}
/**Look up a full postcode.
WARNING - EXECUTING THIS FUNCTION COSTS 1p!!
* @param postcode A full postcode to lookup, any caps, any spaces
* @return A PostcodeResult if the postcode is valid, otherwise null
* @throws LostDbConnection
*/
@SuppressWarnings("unchecked")
public synchronized PostcodeResult lookupFull(String postcode) throws LostDbConnection {
postcode = StringUtils.stripSpaces(postcode.toUpperCase());
if (postcode.length() < PostcodeService.minPostcodeLen) {
return null;
}
String filename = postcode.substring(0, postcode.length()-PostZonImporter.blocksize);
InputStream is;
byte[] cached = null; //longCache.get(filename);
if (cached == null) {
try {
File f = new File(fullFile + File.separator + filename);
cached = new byte[(int) f.length()];
FileInputStream fis = new FileInputStream(f);
fis.read(cached);
//longCache.put(filename, cached);
} catch (FileNotFoundException e) {
log.warn("Failed to load Full data from " + fullFile + " for prefix: " + filename + ", bad code or missing file?");
return null;
} catch (IOException e) {
log.error("Error reading full data: " + e);
return null;
}
}
is = new ByteArrayInputStream(cached);
try {
GZIPInputStream gzis = new GZIPInputStream(is);
ObjectInputStream ois = new ObjectInputStream(gzis);
TreeMap subMap = (TreeMap)ois.readObject();
PostcodeResult pr = subMap.get(postcode);
return pr;
} catch (IOException e) {
log.error("Error reading full data: " + e);
return null;
} catch (ClassNotFoundException e) {
log.error("PostcodeConvertor internal error, Error reading full data: " + e);
return null;
}
}
}