core/src/main/java/org/jclouds/providers/ProviderRegistry.java

/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.jclouds.providers;

import java.util.HashSet;
import java.util.Set;

/**
 * A registry for holding {@link org.jclouds.providers.ProviderMetadata}.
 */
public class ProviderRegistry {

  private static final Set<ProviderMetadata> providers = new HashSet<ProviderMetadata>();

  public static void registerProvider(ProviderMetadata provider) {
    providers.add(provider);
  }

  public static void uRegisterProvider(ProviderMetadata provider) {
    providers.remove(provider);
  }

  public static Iterable<ProviderMetadata> fromRegistry() {
    return Iterable.class.cast(providers);
  }

  public static void clear() {
    providers.clear();
  }
}