--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tn5250j/encoding/ToolboxCodePageFactory.java	Thu May 22 12:38:09 2014 -0700
@@ -0,0 +1,156 @@
+/**
+ * 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 org.tn5250j.tools.logging.TN5250jLogFactory;
+import org.tn5250j.tools.logging.TN5250jLogger;
+
+/* package */ class 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 final TN5250jLogger log = TN5250jLogFactory.getLogger(this.getClass());
+
+	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.info("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.warn("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;
+		}
+
+		@Override
+		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);
+		}
+
+		@Override
+		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];
+		}
+	}
+
+}
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