core/spi/src/main/java/org/qi4j/spi/cache/NullCache.java

/*
 * Copyright 2010 Niclas Hedhman.
 *
 * 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.qi4j.spi.cache;

/**
 * Cache null object.
 */
public final class NullCache<T>
    implements Cache<T>
{
    @Override
    public T get( String key )
    {
        return null;
    }

    @Override
    public T remove( String key )
    {
        return null;
    }

    @Override
    public void put( String key, T value )
    {
    }

    @Override
    public boolean exists( String key )
    {
        return false;
    }
}