/* eXist Open Source Native XML Database
* Copyright (C) 2000-09, Wolfgang M. Meier (meier@ifs.tu-darmstadt.de)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Id$
*/
package org.exist.xquery.functions.fn;
import org.exist.dom.QName;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.Dependency;
import org.exist.xquery.Function;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.Profiler;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.BooleanValue;
import org.exist.xquery.value.FunctionReturnSequenceType;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.Type;
public class FunTrueOrFalse extends BasicFunction {
public final static FunctionSignature fnTrue =
new FunctionSignature(
new QName("true", Function.BUILTIN_FUNCTION_NS),
"Always returns the boolean value true",
null,
new FunctionReturnSequenceType(Type.BOOLEAN, Cardinality.EXACTLY_ONE, "true"));
public final static FunctionSignature fnFalse =
new FunctionSignature(
new QName("false", Function.BUILTIN_FUNCTION_NS),
"Always returns the boolean value false",
null,
new FunctionReturnSequenceType(Type.BOOLEAN, Cardinality.EXACTLY_ONE, "false"));
public FunTrueOrFalse(XQueryContext context, FunctionSignature signature) {
super(context, signature);
}
public int returnsType() {
return Type.BOOLEAN;
}
/* (non-Javadoc)
* @see org.exist.xquery.Function#getDependencies()
*/
public int getDependencies() {
return Dependency.NO_DEPENDENCY;
}
/* (non-Javadoc)
* @see org.exist.xquery.Function#getCardinality()
*/
public int getCardinality() {
return Cardinality.EXACTLY_ONE;
}
public Sequence eval(Sequence args[], Sequence contextSequence) {
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 (isCalledAs("true"))
{result = BooleanValue.TRUE;}
else
{result = BooleanValue.FALSE;}
if (context.getProfiler().isEnabled())
{context.getProfiler().end(this, "", result);}
return result;
}
}