MemoryModelGetter.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.rdf.model.impl;

import java.util.HashMap;

import org.apache.jena.rdf.model.Model ;
import org.apache.jena.rdf.model.ModelFactory ;
import org.apache.jena.rdf.model.ModelGetter ;
import org.apache.jena.rdf.model.ModelReader ;

public class MemoryModelGetter implements ModelGetter
	{
	protected HashMap<String, Model> models = new HashMap<>();
	
	@Override
    public Model getModel(String URL) 
		{ return models.get( URL ); }
	
	@Override
    public Model getModel(String URL, ModelReader loadIfAbsent) 
		{
		Model m = models.get( URL );
		if (m == null) models.put( URL, m = ModelFactory.createDefaultModel() );
		return m;
		}
	}