@@ -0,0 +1,1232 @@
+/*%0A * Copyright 2015 Michael Rozumyanskiy%0A *%0A * Licensed under the Apache License, Version 2.0 (the %22License%22);%0A * you may not use this file except in compliance with the License.%0A * You may obtain a copy of the License at%0A *%0A *     http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0A%0Apackage com.michaelrocks.lightsaber;%0A%0Aimport javax.inject.Provider;%0A%0Apublic class SingletonProvider%3CT%3E implements Provider%3CT%3E %7B%0A    private final Provider%3CT%3E provider;%0A    private volatile T instance;%0A    private final Object instanceLock = new Object();%0A%0A    public SingletonProvider(final Provider%3CT%3E provider) %7B%0A        this.provider = provider;%0A    %7D%0A%0A    @Override%0A    public T get() %7B%0A        if (instance == null) %7B%0A            synchronized (instanceLock) %7B%0A                if (instance == null) %7B%0A                    instance = provider.get();%0A                %7D%0A            %7D%0A        %7D%0A        return instance;%0A    %7D%0A%7D%0A

Implement provider for singleton scope