package org.eclipse.aether.named.providers;
   
   /*
    * 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.
   */
  
  import java.util.concurrent.TimeUnit;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.eclipse.aether.named.support.NamedLockFactorySupport;
  import org.eclipse.aether.named.support.NamedLockSupport;
  
  /**
   * A no-op lock factory, that creates no-op locks.
   */
  @Singleton
  @Named( NoopNamedLockFactory.NAME )
  public class NoopNamedLockFactory
      extends NamedLockFactorySupport
  {
    public static final String NAME = "noop";
  
    @Override
    protected NoopNamedLock createLock( final String name )
    {
      return new NoopNamedLock( name, this );
    }
  
    private static final class NoopNamedLock extends NamedLockSupport
    {
      private NoopNamedLock( final String name, final NamedLockFactorySupport factory )
      {
        super( name, factory );
      }
  
      @Override
      public boolean lockShared( final long time, final TimeUnit unit )
      {
        return true;
      }
  
      @Override
      public boolean lockExclusively( final long time, final TimeUnit unit )
      {
        return true;
      }
  
      @Override
      public void unlock()
      {
        // no-op
      }
    }
  }