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/****************************************************************************
* Sangria *
* Copyright (C) 2014 Tavian Barnes <tavianator@tavianator.com> *
* *
* 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 com.tavianator.sangria.lazy;
import com.google.inject.Key;
import com.google.inject.Provider;
import com.google.inject.Scope;
import com.google.inject.Scopes;
/**
* Lazy scope implementations.
*
* @author Tavian Barnes (tavianator@tavianator.com)
* @version 1.2
* @since 1.2
*/
public class LazyScopes {
/**
* Lazy version of {@link Scopes#SINGLETON}.
*
* @see LazySingleton
*/
public static final Scope LAZY_SINGLETON = new Scope() {
public <T> Provider<T> scope(final Key<T> key, final Provider<T> creator) {
final Provider<T> singleton = Scopes.SINGLETON.scope(key, creator);
return new Provider<T>() {
public T get() {
return singleton.get();
}
@Override
public String toString() {
return String.format("%s[%s]", creator, LAZY_SINGLETON);
}
};
}
@Override
public String toString() {
return "LazyScopes.LAZY_SINGLETON";
}
};
}
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