line source
/**
* Title: ToolboxCodePage
* Copyright: Copyright (c) 2001, 2002, 2003
* Company:
* @author Kenneth J. Pouncey
* rewritten by LDC, WVL, Luc
* @version 0.4
*
* Description:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
*/
package org.tn5250j.encoding;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import android.util.Log;
class ToolboxCodePageFactory {
private static final String TAG = "ToolboxCodePageFactory";
private final static String[] CODEPAGES = { "Big5", "Cp037", "Cp273", "Cp277", "Cp278",
"Cp280", "Cp284", "Cp285", "Cp297", "Cp420", "Cp424", "Cp437",
"Cp500", "Cp737", "Cp775", "Cp838", "Cp850", "Cp852", "Cp855",
"Cp856", "Cp857", "Cp858", "Cp860", "Cp861", "Cp862", "Cp863",
"Cp864", "Cp865", "Cp866", "Cp868", "Cp869", "Cp870",
"Cp871", "Cp874", "Cp875", "Cp918", "Cp921", "Cp922",
"Cp923", // IBM Latin-9.
"Cp930", "Cp933", "Cp935", "Cp937", "Cp939", "Cp942", "Cp943",
"Cp948", "Cp949", "Cp950", "Cp964", "Cp970", "Cp1006", "Cp1025",
"Cp1026", "Cp1046", "Cp1097", "Cp1098", "Cp1112", "Cp1122",
"Cp1123", "Cp1124", "Cp1140", "Cp1141", "Cp1142", "Cp1143",
"Cp1144", "Cp1145", "Cp1146", "Cp1147", "Cp1148", "Cp1149",
"Cp1252", "Cp1250", "Cp1251", "Cp1253", "Cp1254", "Cp1255",
"Cp1256", "Cp1257", "Cp1258", "Cp1381", "Cp1383", "Cp33722"
};
private static final String CONVERTER_NAME = "com.ibm.as400.access.CharConverter";
private static final String TOBYTES_NAME = "stringToByteArray";
private static final String TOSTRING_NAME = "byteArrayToString";
private static ToolboxCodePageFactory singleton;
private ToolboxCodePageFactory() {
/* private for singleton */
}
public static synchronized ToolboxCodePageFactory getInstance() {
if (singleton == null) {
singleton = new ToolboxCodePageFactory();
}
return singleton;
}
/**
* @return
*/
public String[] getAvailableCodePages() {
try {
final ClassLoader loader = getClassLoader();
Class.forName(CONVERTER_NAME, false, loader);
return CODEPAGES;
}
catch (Exception e) {
Log.i(TAG, "Couldn't locate JT400 Toolbox in classpath. Charset converters can't be used.");
return new String[0];
}
}
/**
* @param encoding
* @return
*/
public ICodePage getCodePage(String encoding) {
try {
ClassLoader loader = getClassLoader();
Class<?> conv_class = Class.forName(CONVERTER_NAME, true, loader);
Constructor<?> conv_constructor = conv_class.getConstructor(new Class[] { String.class });
Method toBytes_method = conv_class.getMethod(TOBYTES_NAME, new Class[] { String.class });
Method toString_method = conv_class.getMethod(TOSTRING_NAME, new Class[] { byte[].class });
Object convobj = conv_constructor.newInstance(new Object[] { encoding });
return new ToolboxConverterProxy(convobj, toBytes_method, toString_method);
}
catch (Exception e) {
Log.w(TAG, "Can't load charset converter from JT400 Toolbox for code page " + encoding, e);
return null;
}
}
private static final ClassLoader getClassLoader() {
ClassLoader loader = ToolboxCodePageFactory.class.getClassLoader();
if (loader == null) {
loader = ClassLoader.getSystemClassLoader();
}
return loader;
}
private static class ToolboxConverterProxy implements ICodePage {
private final Object converter;
private final Method tobytesMethod;
private final Method tostringMethod;
private ToolboxConverterProxy(Object converterObject, Method tobytesMethod, Method tostringMethod) {
super();
this.converter = converterObject;
this.tobytesMethod = tobytesMethod;
this.tostringMethod = tostringMethod;
}
public char ebcdic2uni(int index) {
Object result;
try {
result = tostringMethod.invoke(converter, new Object[] { new byte[] { (byte)(index & 0xFF) } });
}
catch (Throwable t) {
result = null;
}
if (result == null)
return 0x00;
return ((String) result).charAt(0);
}
public byte uni2ebcdic(char index) {
Object result;
try {
result = tobytesMethod.invoke(converter, new Object[] { new String(new char[] { index }) });
}
catch (Throwable t) {
result = null;
}
if (result == null)
return 0x00;
return ((byte[]) result)[0];
}
}
}