/*
* 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.brooklyn.camp.spi.collection;
import java.util.ArrayList;
import java.util.List;
import org.apache.brooklyn.camp.spi.AbstractResource;
public class AggregatingResourceLookup<T extends AbstractResource> extends AbstractResourceLookup<T> {
List<ResourceLookup<T>> targets = new ArrayList<ResourceLookup<T>>();
@SafeVarargs
public static <T extends AbstractResource> AggregatingResourceLookup<T> of(ResourceLookup<T> ...targets) {
AggregatingResourceLookup<T> result = new AggregatingResourceLookup<T>();
for (ResourceLookup<T> item: targets) result.targets.add(item);
return result;
}
public static <T extends AbstractResource> AggregatingResourceLookup<T> of(Iterable<ResourceLookup<T>> targets) {
AggregatingResourceLookup<T> result = new AggregatingResourceLookup<T>();
for (ResourceLookup<T> item: targets) result.targets.add(item);
return result;
}
public T get(String id) {
for (ResourceLookup<T> item: targets) {
T result = item.get(id);
if (result!=null) return result;
}
return null;
}
public List<ResolvableLink<T>> links() {
List<ResolvableLink<T>> result = new ArrayList<ResolvableLink<T>>();
for (ResourceLookup<T> item: targets) result.addAll(item.links());
return result;
}
}