org.jclouds.vcloud.functions.OrgNameToEndpoint Maven / Gradle / Ivy

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/**
 * 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.vcloud.functions;

import java.net.URI;
import java.util.Map;
import java.util.NoSuchElementException;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.jclouds.vcloud.domain.ReferenceType;
import org.jclouds.vcloud.endpoints.Org;

import com.google.common.base.Function;
import com.google.common.base.Supplier;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class OrgNameToEndpoint implements Function {
   private final Supplier> orgNameToEndpointSupplier;
   private final Supplier defaultOrg;

   @Inject
   public OrgNameToEndpoint(@Org Supplier> orgNameToEndpointSupplier,
         @Org Supplier defaultOrg) {
      this.orgNameToEndpointSupplier = orgNameToEndpointSupplier;
      this.defaultOrg = defaultOrg;
   }

   public URI apply(Object from) {
      try {
         Map orgNameToEndpoint = orgNameToEndpointSupplier.get();
         return from == null ? defaultOrg.get().getHref() : orgNameToEndpoint.get(from).getHref();
      } catch (NullPointerException e) {
         throw new NoSuchElementException("org " + from + " not found in " + orgNameToEndpointSupplier.get().keySet());
      }
   }

}