/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *   SPDX-License-Identifier: Apache-2.0
 */

package org.apache.jena.sparql.function.library.cdt;

import java.util.Arrays;
import java.util.List;

import org.apache.jena.cdt.CDTValue;
import org.apache.jena.sparql.expr.NodeValue;

public class ReverseFct extends FunctionBase1List
{
    @Override
    protected NodeValue _exec( final List<CDTValue> list, final NodeValue nvList ) {
        if ( list.size() < 2 )
            return nvList;

        final CDTValue[] reverseArray = new CDTValue[ list.size() ];
        int i = list.size() - 1;
        for ( final CDTValue v : list ) {
            reverseArray[i] = v;
            i--;
        }

        final List<CDTValue> reverseList = Arrays.asList(reverseArray);
        return CDTLiteralFunctionUtils.createNodeValue(reverseList);
    }

}
