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A library for core classes (Graph, Vertex, Edge, etc.)

There is a newer version: 2.11.0

package io.konig.core.impl;

/*
 * #%L
 * Konig Core
 * %%
 * Copyright (C) 2015 - 2017 Gregory McFall
 * %%
 * Licensed 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.
 * #L%
 */


import java.util.ArrayList;
import java.util.Collection;

import org.openrdf.model.Namespace;

import io.konig.core.NamespaceManager;

public class EmptyNamespaceManager implements NamespaceManager {
	
	private static EmptyNamespaceManager INSTANCE = new EmptyNamespaceManager();
	
	public static EmptyNamespaceManager getInstance() {
		return INSTANCE;
	}

	@Override
	public Namespace findByPrefix(String prefix) {
		return null;
	}

	@Override
	public Namespace findByName(String name) {
		return null;
	}

	@Override
	public NamespaceManager add(Namespace ns) {
		throw new UnsupportedOperationException();
	}

	@Override
	public NamespaceManager add(String prefix, String namespace) {
		throw new UnsupportedOperationException();
	}

	@Override
	public Collection listNamespaces() {
		return new ArrayList<>();
	}

}