`/*
* (c) Copyright 2007, 2008 Hewlett-Packard Development Company, LP
* All rights reserved.
* [See end of file]
*/
package arq.examples.filter;
import com.hp.hpl.jena.sparql.expr.NodeValue;
import com.hp.hpl.jena.sparql.function.FunctionBase1;
/** Example filter function that returns an indicative type string.
* <ul>
* <li>"Number", if it's a number of some kind</li>
* <li>"String", if it's string</li>
* <li>"DateTime", if it's a date time</li>
* <li>"unknown" otherwise</li>
* </ul>
*
* Usage:
* <pre>
* PREFIX ext: <java:arq.examples.ext.>
* </pre>
* <pre>
* FILTER ext:classify(3+?x)
* <pre>
* @author Andy Seaborne
*/
public class classify extends FunctionBase1
{
public classify() { super() ; }
//@Override
public NodeValue exec(NodeValue v)
{
if ( v.isNumber() ) return NodeValue.makeString("number") ;
if ( v.isDateTime() ) return NodeValue.makeString("dateTime") ;
if ( v.isString() ) return NodeValue.makeString("string") ;
return NodeValue.makeString("unknown") ;
}
}
/*
* (c) Copyright 2007, 2008 Hewlett-Packard Development Company, LP
* 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.
*/`