--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/software/eXist/mpdl-modules/src/org/exist/xquery/modules/mpdltext/GetDonatusQueryVariants.java	Wed Nov 24 17:24:23 2010 +0100
@@ -0,0 +1,92 @@
+/*
+ *  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 java.util.ArrayList;
+
+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.donatus.xmlrpc.DonatusCache;
+import de.mpg.mpiwg.berlin.mpdl.donatus.xmlrpc.DonatusVariant;
+import de.mpg.mpiwg.berlin.mpdl.exception.ApplicationException;
+
+/**
+ * @author Josef Willenborg (jwillenborg@mpiwg-berlin.mpg.de)
+ */
+public class GetDonatusQueryVariants extends BasicFunction {
+
+	public final static FunctionSignature signature =
+		new FunctionSignature(
+			new QName("get-donatus-query-variants", MPDLTextModule.NAMESPACE_URI, MPDLTextModule.PREFIX),
+			"A function which delivers morphological variants (seperated by |) of a given Lucene query string of a given " +
+			"language over the lemma of that variant by the Donatus language technology",
+			new SequenceType[] { new SequenceType(Type.STRING, Cardinality.ZERO_OR_MORE), 
+			                     new SequenceType(Type.STRING, Cardinality.ZERO_OR_MORE) },
+			new SequenceType(Type.STRING, Cardinality.ZERO_OR_MORE));
+
+	public GetDonatusQueryVariants(XQueryContext context) {
+		super(context, signature);
+	}
+
+	public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
+	  Sequence langSeq = args[0];
+    Sequence luceneQueryStringSeq = args[1];
+    String language = "";
+    String luceneQueryString = "";
+		if (langSeq.isEmpty() || luceneQueryStringSeq.isEmpty())
+			return Sequence.EMPTY_SEQUENCE;
+		language = langSeq.getStringValue();
+		luceneQueryString = luceneQueryStringSeq.getStringValue();
+		ArrayList<DonatusVariant> resultVariants = null;
+		try { 
+	    DonatusCache donatusCache = DonatusCache.getInstance();
+	    resultVariants = donatusCache.getQueryVariants(language, luceneQueryString);
+    } catch (ApplicationException e) {
+      throw new XPathException(e);
+    }
+    ValueSequence result = new ValueSequence();
+    String resultStr = "";
+    int size = resultVariants.size();
+    for (int i=0; i<size; i++) {
+      String variantStr = resultVariants.get(i).getForm();
+      resultStr = resultStr + variantStr + "|";
+    }
+    if (size == 0) {
+      result.add(new StringValue(""));
+    } else {
+      resultStr = resultStr.substring(0, resultStr.length() - 1); // without last | character
+      result.add(new StringValue(resultStr));
+    }
+		return result;
+	}
+}