/*
* eXist Open Source Native XML Database
* Copyright (C) 2006-2009 The eXist Project
* http://exist-db.org
*
* 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
package org.exist.xquery.functions.fn;
import org.exist.dom.QName;
import org.exist.util.Collations;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.Constants;
import org.exist.xquery.Dependency;
import org.exist.xquery.Function;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.Profiler;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.BooleanValue;
import org.exist.xquery.value.FunctionReturnSequenceType;
import org.exist.xquery.value.FunctionParameterSequenceType;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;
/**
*
* @author perig
*
*/
public class FunCodepointEqual extends BasicFunction {
public final static FunctionSignature signature =
new FunctionSignature(
new QName("codepoint-equal", Function.BUILTIN_FUNCTION_NS, FnModule.PREFIX),
"Returns true or false depending on whether the value of $string-1 " +
"is equal to the value of $string-2, according to the Unicode " +
"code point collation.",
new SequenceType[] {
new FunctionParameterSequenceType("string-1", Type.STRING,
Cardinality.ZERO_OR_ONE, "The first string"),
new FunctionParameterSequenceType("string-2", Type.STRING,
Cardinality.ZERO_OR_ONE, "The second string"),
},
new FunctionReturnSequenceType(Type.BOOLEAN, Cardinality.ZERO_OR_ONE,
"true() if the codepoints are equal, false() otherwise"));
public FunCodepointEqual(XQueryContext context) {
super(context, signature);
}
public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
if (context.getProfiler().isEnabled()) {
context.getProfiler().start(this);
context.getProfiler().message(this, Profiler.DEPENDENCIES,
"DEPENDENCIES", Dependency.getDependenciesName(this.getDependencies()));
if (contextSequence != null)
{context.getProfiler().message(this, Profiler.START_SEQUENCES,
"CONTEXT SEQUENCE", contextSequence);}
}
Sequence result;
if (args[0].isEmpty())
{result = Sequence.EMPTY_SEQUENCE;}
else if (args[1].isEmpty())
{result = Sequence.EMPTY_SEQUENCE;}
else {
result = new BooleanValue(Collations.compare(
//TODO : how ugly ! We should be able to use Collations.CODEPOINT here ! -pb
context.getDefaultCollator(),
getArgument(0).eval(contextSequence).getStringValue(),
getArgument(1).eval(contextSequence).getStringValue())
== Constants.EQUAL);
}
if (context.getProfiler().isEnabled())
{context.getProfiler().end(this, "", result);}
return result;
}
}