--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/software/eXist/mpdl-modules/src/org/exist/xquery/modules/mpdltext/GetTranscodedText.java	Wed Nov 24 17:24:23 2010 +0100
@@ -0,0 +1,84 @@
+/*
+ *  eXist Open Source Native XML Database: Extension module
+ *  Copyright (C) 2008 Josef Willenborg
+ *  jwillenborg@mpiwg-berlin.mpg.de
+ *  http://www.mpiwg-berlin.mpg.de
+ *  
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, 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 Lesser General Public License for more details.
+ *  
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *  
+ *  $Id: TextModule.java $
+ */
+package org.exist.xquery.modules.mpdltext;
+
+import org.exist.dom.QName;
+import org.exist.xquery.BasicFunction;
+import org.exist.xquery.Cardinality;
+import org.exist.xquery.FunctionSignature;
+import org.exist.xquery.XPathException;
+import org.exist.xquery.XQueryContext;
+import org.exist.xquery.value.Sequence;
+import org.exist.xquery.value.SequenceType;
+import org.exist.xquery.value.StringValue;
+import org.exist.xquery.value.Type;
+import org.exist.xquery.value.ValueSequence;
+
+import de.mpg.mpiwg.berlin.mpdl.exception.ApplicationException;
+import de.mpg.mpiwg.berlin.mpdl.lt.lex.db.LexHandler;
+
+/**
+ * @author Josef Willenborg (jwillenborg@mpiwg-berlin.mpg.de)
+ */
+public class GetTranscodedText extends BasicFunction {
+
+	public final static FunctionSignature signature =
+		new FunctionSignature(
+			new QName("transcode", MPDLTextModule.NAMESPACE_URI, MPDLTextModule.PREFIX),
+			"A function which transcodes the given string to the given coding. First parameter " +
+			"is the from coding (e.g. buckwalter), second parameter is the to coding (e.g. unicode) " +
+			"and third parameter is the text which should be transcoded.",
+			new SequenceType[] { new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE), 
+                           new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE),
+			                     new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE) },
+			new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE));
+
+	public GetTranscodedText(XQueryContext context) {
+		super(context, signature);
+	}
+
+	public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
+	  Sequence fromEncodingSeq = args[0];
+    Sequence toEncodingSeq = args[1];
+    Sequence inputStrSeq = args[2];
+    String fromEncoding = "";
+    String toEncoding = "";
+    String inputStr = "";
+		if (fromEncodingSeq.isEmpty() || toEncodingSeq.isEmpty())
+			return Sequence.EMPTY_SEQUENCE;
+		fromEncoding = fromEncodingSeq.getStringValue();
+		toEncoding = toEncodingSeq.getStringValue();
+		inputStr = inputStrSeq.getStringValue();
+		String transcodedStr = null;
+		try {
+	    LexHandler lexHandler = LexHandler.getInstance();
+	    transcodedStr = lexHandler.transcode(fromEncoding, toEncoding, inputStr);
+    } catch (ApplicationException e) {
+      throw new XPathException(e);
+    }
+    ValueSequence result = new ValueSequence();
+    result.add(new StringValue(transcodedStr));
+		return result;
+	}
+	
+}