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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.qpid.server.model;
import java.util.HashMap;
import java.util.Map;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.MoreExecutors;
import com.google.common.util.concurrent.SettableFuture;
import org.apache.qpid.server.plugin.ConfiguredObjectTypeFactory;
import org.apache.qpid.server.store.ConfiguredObjectDependency;
import org.apache.qpid.server.store.ConfiguredObjectRecord;
import org.apache.qpid.server.store.UnresolvedConfiguredObject;
abstract public class AbstractConfiguredObjectTypeFactory<X extends AbstractConfiguredObject<X>> implements ConfiguredObjectTypeFactory<X>
{
private final Class<X> _clazz;
public AbstractConfiguredObjectTypeFactory(final Class<X> clazz)
{
_clazz = clazz;
}
@Override
public final String getType()
{
return ConfiguredObjectTypeRegistry.getType(_clazz);
}
@Override
public final Class<? super X> getCategoryClass()
{
return (Class<? super X>) ConfiguredObjectTypeRegistry.getCategory(_clazz);
}
@Override
public X create(final ConfiguredObjectFactory factory,
final Map<String, Object> attributes,
final ConfiguredObject<?>... parents)
{
X instance = createInstance(attributes, parents);
instance.create();
return instance;
}
@Override
public ListenableFuture<X> createAsync(final ConfiguredObjectFactory factory,
final Map<String, Object> attributes,
final ConfiguredObject<?>... parents)
{
final SettableFuture<X> returnVal = SettableFuture.create();
final X instance = createInstance(attributes, parents);
final ListenableFuture<Void> createFuture = instance.createAsync();
createFuture.addListener(new Runnable()
{
@Override
public void run()
{
returnVal.set(instance);
}
}, MoreExecutors.sameThreadExecutor());
return returnVal;
}
protected abstract X createInstance(Map<String, Object> attributes, ConfiguredObject<?>... parents);
public final <C extends ConfiguredObject<?>> C getParent(Class<C> parentClass, ConfiguredObject<?>... parents)
{
if(!parents[0].getModel().getParentTypes((Class<? extends ConfiguredObject>) getCategoryClass()).contains(
ConfiguredObjectTypeRegistry.getCategory(parentClass)))
{
throw new IllegalArgumentException(parentClass.getSimpleName() + " is not a parent of " + _clazz.getSimpleName());
}
for(ConfiguredObject<?> parent : parents)
{
if(parentClass.isInstance(parent))
{
return (C) parent;
}
}
throw new IllegalArgumentException("No parent of class " + parentClass.getSimpleName() + " found.");
}
@Override
public UnresolvedConfiguredObject<X> recover(final ConfiguredObjectFactory factory,
final ConfiguredObjectRecord record,
final ConfiguredObject<?>... parents)
{
return new GenericUnresolvedConfiguredObject( record, parents );
}
private class GenericUnresolvedConfiguredObject extends AbstractUnresolvedObject<X>
{
public GenericUnresolvedConfiguredObject(
final ConfiguredObjectRecord record, final ConfiguredObject<?>[] parents)
{
super(_clazz, record, parents);
}
@Override
protected <C extends ConfiguredObject<C>> void resolved(final ConfiguredObjectDependency<C> dependency,
final C value)
{
}
@Override
public X resolve()
{
Map<String,Object> attributesWithId = new HashMap<String, Object>(getRecord().getAttributes());
attributesWithId.put(ConfiguredObject.ID, getRecord().getId());
X instance = createInstance(attributesWithId, getParents());
instance.registerWithParents();
return instance;
}
}
}
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