diff src/org/tn5250j/encoding/JavaCodePageFactory.java @ 5:cbdff98c45ea tn5250

adding tn5250 files
author Carl Byington <carl@five-ten-sg.com>
date Thu, 22 May 2014 12:38:09 -0700
parents
children ab8d2f6c5847
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tn5250j/encoding/JavaCodePageFactory.java	Thu May 22 12:38:09 2014 -0700
@@ -0,0 +1,94 @@
+/**
+ * Title: JavaCodePage
+ * Copyright:   Copyright (c) 2001, 2002, 2003
+ * Company:
+ * @author  LDC, WVL, Luc, master_jaf
+ * @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.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.CharsetEncoder;
+
+/* package */ class JavaCodePageFactory extends AbstractCodePage {
+
+	private final CharsetEncoder encoder;
+	private final CharsetDecoder decoder;
+
+	/* package */ JavaCodePageFactory(String encoding, CharsetEncoder encoder, CharsetDecoder decoder) {
+		super(encoding);
+		this.encoder = encoder;
+		this.decoder = decoder;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.tn5250j.encoding.CodePage#ebcdic2uni(int)
+	 */
+	@Override
+	public char ebcdic2uni(int codepoint) {
+		try {
+			final ByteBuffer in = ByteBuffer.wrap(new byte[] { (byte) codepoint });
+			final CharBuffer out = this.decoder.decode(in);
+			return out.get(0);
+		} catch (Exception cce) {
+			return ' ';
+		}
+	}
+
+	/* (non-Javadoc)
+	 * @see org.tn5250j.encoding.CodePage#uni2ebcdic(char)
+	 */
+	@Override
+	public byte uni2ebcdic(char character) {
+		try {
+			final CharBuffer in = CharBuffer.wrap(new char[] {character});
+			final ByteBuffer out = this.encoder.encode(in);
+			return out.get(0);
+		} catch (Exception cce) {
+			return 0x0;
+		}
+	}
+
+	/**
+	 * @param encoding
+	 * @return A new {@link CodePage} object OR null, if not available.
+	 */
+	/* package */ static ICodePage getCodePage(final String encoding) {
+		CharsetDecoder dec = null;
+		CharsetEncoder enc = null;
+		try {
+			final Charset cs = java.nio.charset.Charset.forName(encoding);
+			dec = cs.newDecoder();
+			enc = cs.newEncoder();
+		} catch (Exception e) {
+			enc = null;
+			dec = null;
+		}
+		if ((enc != null) && (dec != null)) {
+			return new JavaCodePageFactory(encoding, enc, dec);
+		}
+		return null;
+	}
+
+}
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