ContainerFilter.java

/*
 * 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.permissions.utils;

import java.util.function.Predicate;

import org.apache.jena.rdf.model.Property ;
import org.apache.jena.rdf.model.Statement ;
import org.apache.jena.vocabulary.RDF ;

public class ContainerFilter implements Predicate<Statement>
{

	@Override
	public boolean test( final Statement o )
	{
		final Property p = o.getPredicate();
		if (p.getNameSpace().equals(RDF.getURI())
				&& p.getLocalName().startsWith("_"))
		{
			try
			{
				Integer.parseInt(p.getLocalName().substring(1));
				return true;
			}
			catch (final NumberFormatException e)
			{
				// acceptable;
			}
		}
		return false;
	}

}