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/*
* 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.tuscany.sca.implementation.java.injection;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;
import org.apache.tuscany.sca.core.factory.ObjectCreationException;
import org.apache.tuscany.sca.core.factory.ObjectFactory;
/**
* Resolves targets configured in a multiplicity by delegating to object factories and returning an <code>List</code>
* containing object instances
*
* @version $Rev$ $Date$
*/
public class ListMultiplicityObjectFactory implements ObjectFactory<Collection<?>> {
private Collection<ObjectFactory<?>> factories;
private Class<?> collectionType;
public ListMultiplicityObjectFactory(List<ObjectFactory<?>> factories, Class<?> collectionType) {
assert factories != null : "Object factories were null";
this.factories = factories;
this.collectionType = collectionType;
}
public Collection<?> getInstance() throws ObjectCreationException {
Collection<Object> collection = null;
if (SortedSet.class.isAssignableFrom(collectionType)) {
collection = new TreeSet<Object>();
} else if (Set.class.isAssignableFrom(collectionType)) {
collection = new HashSet<Object>();
} else if (List.class.isAssignableFrom(collectionType)) {
collection = new ArrayList<Object>();
} else {
collection = new ArrayList<Object>();
}
for (ObjectFactory<?> factory : factories) {
collection.add(factory.getInstance());
}
return collection;
}
}
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