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The Open Source version of the IBM Toolbox for Java
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (IBM Toolbox for Java - OSS version)
//
// Filename: NLS.java
//
// The source code contained herein is licensed under the IBM Public License
// Version 1.0, which has been approved by the Open Source Initiative.
// Copyright (C) 1997-2001 International Business Machines Corporation and
// others. All rights reserved.
//
///////////////////////////////////////////////////////////////////////////////
package com.ibm.as400.access;
import java.io.*;
import java.util.*;
/**
* The NLS class contains a set of static methods that can be used
* to access various pieces of National Language Support information
* (such as language and country descriptions) on a system.
**/
public final class NLS
{
private static final String CLASSNAME = "com.ibm.as400.access.NLS";
static
{
if (Trace.traceOn_) Trace.logLoadPath(CLASSNAME);
}
private static int countryBytes_ = 11000;
private static int languageBytes_ = 3000;
private static final Hashtable languages_ = new Hashtable();
private static final Hashtable countries_ = new Hashtable();
static boolean forceJavaTables_ = false;
private NLS()
{
}
//@B0A
/**
* Returns a best-guess Java encoding given a CCSID.
* @param ccsid The coded character set identifier (CCSID), e.g. 37.
* @return The encoding that maps to the given CCSID, or null
* if one is not known.
* @see #encodingToCCSID
* @see #localeToCCSID
**/
public static String ccsidToEncoding(int ccsid)
{
return (String)ConversionMaps.ccsidEncoding_.get(Integer.toString(ccsid));
}
//@B0A
/**
* Returns a best-guess CCSID given a Java encoding.
* @param encoding The encoding, e.g. "Cp037".
* @return The CCSID that maps to the given encoding, or -1
* if one is not known.
* @see #ccsidToEncoding
* @see #localeToCCSID
**/
public static int encodingToCCSID(String encoding)
{
if (encoding == null) return -1;
String ccsid = (String)ConversionMaps.encodingCcsid_.get(encoding);
if (ccsid == null) return -1;
return Integer.parseInt(ccsid);
}
//@B0A
/**
* Returns a best-guess CCSID given a Java locale string.
* Note that the CCSID returned will be the preferred system CCSID, i.e.
* usually EBCDIC. So, the locale string representing English "en" will
* return the single-byte EBCDIC CCSID of 37.
* @param localeString The locale string, e.g. "de_CH".
* @return The CCSID that maps the given locale string, or -1
* if one is not known.
**/
public static int localeToCCSID(String localeString)
{
if (localeString == null) return -1;
String ls = localeString.trim();
while (ls != null && ls.length() > 0)
{
String ccsidString = (String)ConversionMaps.localeCcsidMap_.get(ls);
if (ccsidString != null)
{
return Integer.parseInt(ccsidString);
}
ls = ls.substring(0, ls.lastIndexOf('_'));
}
return -1;
}
//@B0A
/**
* Returns a best-guess CCSID given a Java Locale object.
* Note that the CCSID returned will be the preferred system CCSID, i.e.
* usually EBCDIC. So, the Locale representing English ({@link java.util.Locale#ENGLISH Locale.ENGLISH})
* will return the single-byte EBCDIC CCSID of 37.
* @param locale The Locale object.
* @return The CCSID that maps the given locale, or -1
* if one is not known.
**/
public static int localeToCCSID(Locale locale)
{
if (locale == null) return -1;
String ls = locale.toString();
return localeToCCSID(ls);
}
/**
* Returns a best-guess National Language Version (NLV) string given a Java locale string.
* If there is no known mapping for the given Locale or one of its parents (e.g. "en" is a parent of "en_US"),
* then "" is returned.
* @param localeString The locale string, e.g. "de_CH".
* @return The NLV string (e.g. "2924") that maps the given locale, or "" if one is not known.
**/
public static String localeToNLV(String localeString)
{
if (localeString == null) return "";
String ls = localeString.trim();
while (ls != null && ls.length() > 0)
{
String nlvString = (String)ConversionMaps.localeNlvMap_.get(ls);
if (nlvString != null)
{
return nlvString;
}
ls = ls.substring(0, ls.lastIndexOf('_'));
}
return "";
}
/**
* Returns a best-guess National Language Version (NLV) string given a Java Locale object.
* If there is no known mapping for the given Locale or one of its parents (e.g. "en" is a parent of "en_US"),
* then "" is returned.
* @param locale The Locale object.
* @return The NLV string (e.g. "2924") that maps the given locale, or "" if one is not known.
**/
public static String localeToNLV(Locale locale)
{
if (locale == null) return "";
String ls = locale.toString();
return localeToNLV(ls);
}
/**
* Retrieves the descriptive text for the specified country or region identifier.
* The list is cached, so that a subsequent call to this method will
* return immediately if the specified country or region identifier is in the list.
* If it is not in the list, the system will be queried.
* @param system The system.
* @param countryID The country or region identifier.
* @return The descriptive text.
* @throws AS400Exception If an error occurs.
* @throws AS400SecurityException If a security or authority error occurs.
* @throws ErrorCompletingRequestException If an error occurs before the request is completed.
* @throws InterruptedException If this thread is interrupted.
* @throws IOException If an error occurs while communicating with the system.
* @throws ObjectDoesNotExistException If the object does not exist.
* @see #getLanguageDescription
**/
public static String getCountryDescription(AS400 system, String countryID)
throws AS400Exception,
AS400SecurityException,
ErrorCompletingRequestException,
InterruptedException,
IOException,
ObjectDoesNotExistException
{
countryID = countryID.trim().toUpperCase();
String description = (String)countries_.get(countryID);
if (description == null)
{
// Retrieve it from the system.
int ccsid = system.getCcsid();
ConvTable conv = ConvTable.getTable(ccsid, null);
ProgramParameter[] parms = new ProgramParameter[4];
parms[0] = new ProgramParameter(countryBytes_); // receiver variable
parms[1] = new ProgramParameter(BinaryConverter.intToByteArray(countryBytes_)); // length of receiver variable
parms[2] = new ProgramParameter(conv.stringToByteArray("RTVC0100")); // format name
parms[3] = new ProgramParameter(new byte[4]); // error code
ProgramCall pc = new ProgramCall(system, "/QSYS.LIB/QLGRTVCI.PGM", parms);
if (!pc.run())
{
throw new AS400Exception(pc.getMessageList());
}
// Note: The V5R1 API doc has the wrong offsets.
byte[] output = parms[0].getOutputData();
int bytesReturned = BinaryConverter.byteArrayToInt(output, 0);
int bytesAvailable = BinaryConverter.byteArrayToInt(output, 4);
int offset = BinaryConverter.byteArrayToInt(output, 12);
if (bytesAvailable > bytesReturned)
{
if (Trace.traceOn_)
{
Trace.log(Trace.DIAGNOSTIC, "Increasing RetrieveCountryID chunk size from "+countryBytes_+" to "+(bytesAvailable+offset)+" and re-retrieving.");
}
countryBytes_ = bytesAvailable+offset;
return getCountryDescription(system, countryID);
}
ccsid = BinaryConverter.byteArrayToInt(output, 8);
conv = ConvTable.getTable(ccsid, null);
int numberOfIDs = BinaryConverter.byteArrayToInt(output, 16);
for (int i=0; i bytesReturned)
{
if (Trace.traceOn_)
{
Trace.log(Trace.DIAGNOSTIC, "Increasing RetrieveLanguageID chunk size from "+languageBytes_+" to "+(bytesAvailable+offset)+" and re-retrieving.");
}
languageBytes_ = bytesAvailable+offset;
return getLanguageDescription(system, languageID);
}
int numberOfIDs = BinaryConverter.byteArrayToInt(output, 8);
ccsid = BinaryConverter.byteArrayToInt(output, 12);
conv = ConvTable.getTable(ccsid, null);
for (int i=0; i
* The usefulness of this method is arbitrary. Typically, applications only need to
* force Java conversion if they are seeing inconsistent character conversion between
* an older release of the Toolbox and a newer one. Some problem characters include
* EBCDIC line feeds and a few characters in Katakana, such as the middle dot or bullet.
* @param forceJavaTables Specify true if the Java Runtime Environement converter tables are used;
* false if the Toolbox converter tables are used. The default is false.
* @see #isForceJavaConversion
**/
public static void setForceJavaConversion(boolean forceJavaTables)
{
forceJavaTables_ = forceJavaTables;
}
}