/*******************************************************************************
* Copyright 2014 Miami-Dade County
*
* Licensed 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.sharegov.cirm.utils;
import org.sharegov.cirm.RequestScopeFilter;
public class RequestScopeRef<T> implements Ref<T>
{
Ref<T> factory;
public RequestScopeRef(Ref<T> factory)
{
this.factory = factory;
}
@SuppressWarnings("unchecked")
@Override
public T resolve()
{
T value = (T)RequestScopeFilter.get(this);
if (value == null)
{
value = factory.resolve();
RequestScopeFilter.set(this, value);
}
return value;
}
public RequestScopeRef<T> set(T value)
{
RequestScopeFilter.set(this, value);
return this;
}
}