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ARQ is a SPARQL 1.1 query engine for Apache Jena

There is a newer version: 5.2.0

/*
 * 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
 *
 *     http://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.
 */

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

import org.apache.jena.atlas.lib.Lib;
import org.apache.jena.query.QueryBuildException;
import org.apache.jena.sparql.expr.ExprEvalException;
import org.apache.jena.sparql.expr.ExprList;
import org.apache.jena.sparql.expr.NodeValue;
import org.apache.jena.sparql.expr.nodevalue.XSDFuncOp;
import org.apache.jena.sparql.function.FunctionBase;

import java.util.ArrayList;
import java.util.List;

/** sprintf(string,v1,v2,...) - Java style */

public class sprintf extends FunctionBase
{
    public sprintf() { super() ; }

    @Override
    public void checkBuild(String uri, ExprList args) {
        if(args.size() < 2)
            throw new QueryBuildException("Function '"+ Lib.className(this)+"' takes at least two arguments") ;
    }

    @Override
    public NodeValue exec(List args) {
        if ( args.size() < 2 )
            throw new ExprEvalException(Lib.className(this)+": Wrong number of arguments: "+
                    args.size()+" : [wanted at least 2]") ;

        NodeValue v1 = args.get(0) ;
        List allArgs = new ArrayList<>();
        for(int i = 1;i < args.size();i++)
            allArgs.add(args.get(i));

        return XSDFuncOp.javaSprintf(v1, allArgs) ;
    }
}