/**
 * ============LICENSE_START====================================================
 * org.onap.aaf
 * ===========================================================================
 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
 * ===========================================================================
 * 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.
 * ============LICENSE_END====================================================
 *
 */
package org.onap.aaf.cadi.locator;

import java.net.URI;
import java.net.URISyntaxException;

import org.onap.aaf.cadi.Locator;
import org.onap.aaf.cadi.LocatorException;

public class SingleEndpointLocator implements Locator<URI> {
	private final URI uri;
	private final static Item item = new Item() {};  
	
	public SingleEndpointLocator(final URI uri) {
		this.uri = uri;
	}
	
	public SingleEndpointLocator(final String endpoint) throws URISyntaxException {
		this.uri = new URI(endpoint);
	}

	@Override
	public URI get(Item item) throws LocatorException {
		return uri;
	}

	@Override
	public boolean hasItems() {
		return true;
	}

	@Override
	public void invalidate(Item item) throws LocatorException {
		// Endpoints cannot be invalidated
	}

	@Override
	public Item best() throws LocatorException {
		return item;
	}

	@Override
	public Item first() throws LocatorException {
		return item;
	}

	@Override
	public Item next(Item inItem) throws LocatorException {
		// only one item
		return null;
	}

	@Override
	public boolean refresh() {
		// Never refreshed
		return true;
	}

	@Override
	public void destroy() {
		// Nothing to do here
	}
}