/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-2009 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 program; if not, write to the Free Software Foundation
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $Id$
*/
package org.exist.xquery.functions;
import java.text.Collator;
import org.exist.dom.QName;
import org.exist.util.Collations;
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.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.Item;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;
public class FunEndsWith extends CollatingFunction {
public final static FunctionSignature signatures [] = {
new FunctionSignature(
new QName("ends-with", Function.BUILTIN_FUNCTION_NS),
"Returns true if the string value of $suffix is a suffix of the " +
"string value of $source-string, false otherwise. If either $source-string or $suffix is the empty " +
"sequence, the empty sequence is returned.",
new SequenceType[] {
new FunctionParameterSequenceType("source-string", Type.STRING, Cardinality.ZERO_OR_ONE, "The source-string"),
new FunctionParameterSequenceType("suffix", Type.STRING, Cardinality.ZERO_OR_ONE, "The suffix")
},
new FunctionReturnSequenceType(Type.BOOLEAN, Cardinality.ONE, "true() if $suffix is suffix of $source-string, false() otherwise")),
new FunctionSignature (
new QName("ends-with", Function.BUILTIN_FUNCTION_NS),
"Returns true if the string value of $suffix is a suffix of the " +
"string value of $source-string using collation $collation-uri, " + " false otherwise. If " +
"either $source-string or $suffix is the empty sequence, the empty sequence" +
" is returned. " + THIRD_REL_COLLATION_ARG_EXAMPLE,
new SequenceType[] {
new FunctionParameterSequenceType("source-string", Type.STRING, Cardinality.ZERO_OR_ONE, "The source-string"),
new FunctionParameterSequenceType("suffix", Type.STRING, Cardinality.ZERO_OR_ONE, "The suffix"),
new FunctionParameterSequenceType("collation-uri", Type.STRING, Cardinality.EXACTLY_ONE, "The collation URI")
},
new FunctionReturnSequenceType(Type.BOOLEAN, Cardinality.ZERO_OR_ONE, "true() if $suffix is suffix of $source-string, false() otherwise"))
};
public FunEndsWith(XQueryContext context, FunctionSignature signature) {
super(context, signature);
}
//Why override ?
public int returnsType() {
return Type.BOOLEAN;
}
public Sequence eval(Sequence contextSequence, Item contextItem) 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);
if (contextItem != null)
context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
}
Sequence s1 = getArgument(0).eval(contextSequence, contextItem);
Sequence s2 = getArgument(1).eval(contextSequence, contextItem);
Sequence result;
if (s1.isEmpty() || s2.isEmpty())
result = Sequence.EMPTY_SEQUENCE;
else {
Collator collator = getCollator(contextSequence, contextItem, 3);
if (Collations.endsWith(collator, s1.getStringValue(), s2.getStringValue()))
result = BooleanValue.TRUE;
else
result = BooleanValue.FALSE;
}
if (context.getProfiler().isEnabled())
context.getProfiler().end(this, "", result);
return result;
}
}