org.apache.jena.sparql.engine.optimizer.Pattern Maven / Gradle / Ivy

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ARQ is a SPARQL 1.1 query engine for Apache Jena

There is a newer version: 5.1.0

/*
 * 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.engine.optimizer;

import org.apache.jena.atlas.io.IndentedWriter ;
import org.apache.jena.atlas.io.PrintUtils ;
import org.apache.jena.atlas.io.Printable ;
import org.apache.jena.sparql.sse.Item ;

public class Pattern implements Printable
{
    Item subjItem ;
    Item predItem ;
    Item objItem ;
    double weight ; 
    
    public Pattern(double w, Item subj, Item pred, Item obj)
    {
        weight = w ;
        subjItem = subj ;
        predItem = pred ;
        objItem = obj ;
    }        
    
    @Override
    public String toString()
    {
        //return "("+subjItem+" "+predItem+" "+objItem+") ==> "+weight ;
        return PrintUtils.toString(this) ;
    }
    
    @Override
    public void output(IndentedWriter out)
    {
        out.print("(") ;
        out.print("(") ;
        out.print(subjItem.toString()) ;
        out.print(" ") ;
        out.print(predItem.toString()) ;
        out.print(" ") ;
        out.print(objItem.toString()) ;
        out.print(")") ;
        out.print(" ") ;
        out.print(Double.toString(weight)) ;
        out.print(")") ;
    }
}