Package com.hp.gloze.extension

Source Code of com.hp.gloze.extension.CountValues

/*
*  (c) Copyright Hewlett-Packard Company 2001 - 2009
*  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
*  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package com.hp.gloze.extension;

import com.hp.hpl.jena.datatypes.RDFDatatype;
import com.hp.hpl.jena.datatypes.TypeMapper;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.reasoner.InfGraph;
import com.hp.hpl.jena.reasoner.rulesys.BindingEnvironment;
import com.hp.hpl.jena.reasoner.rulesys.RuleContext;
import com.hp.hpl.jena.reasoner.rulesys.builtins.BaseBuiltin;
import com.hp.hpl.jena.util.iterator.ExtendedIterator;
import com.hp.hpl.jena.vocabulary.XSD;
/**
* @author steven.a.battle@googlemail.com
*/
public class CountValues extends BaseBuiltin {

  public String getName() {
    return "countValues";
  }

  public int getArgLength() {
    return 3;
  }

  public String getURI() {
    return "http://www.hp.com/gloze/extension/countValues";
  }

  public boolean bodyCall(Node[] args, int length, RuleContext context) {
    BindingEnvironment env = context.getEnv();
    InfGraph graph = context.getGraph();

    Node s = env.getGroundVersion(args[0]);
    Node p = env.getGroundVersion(args[1]);
    ExtendedIterator i = graph.find(s,p,null);
    int n = i.toSet().size();
   
    TypeMapper tm = TypeMapper.getInstance();
    RDFDatatype type = tm.getTypeByName(XSD.xint.getURI());
    Node count = Node.createLiteral(Integer.toString(n),null,type);
    env.bind(args[2],count);
    return true;
  }
}
TOP

Related Classes of com.hp.gloze.extension.CountValues

TOP
Copyright © 2018 www.massapi.com. All rights reserved.
All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.