/*-
    * #%L
    * io.earcam.instrumental.lade.jpms
    * %%
    * Copyright (C) 2018 earcam
    * %%
    * SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT)
    * 
    * You <b>must</b> choose to accept, in full - any individual or combination of 
   * the following licenses:
   * <ul>
   * 	<li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li>
   * 	<li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li>
   * 	<li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li>
   * 	<li><a href="https://opensource.org/licenses/MIT">MIT</a></li>
   * </ul>
   * #L%
   */
  package io.earcam.instrumental.lade.jpms;
  
  import java.io.IOException;
  import java.lang.module.ModuleDescriptor;
  import java.lang.module.ModuleReader;
  import java.lang.module.ModuleReference;
  import java.net.URI;
  import java.util.Optional;
  import java.util.Set;
  import java.util.stream.Stream;
  
  import io.earcam.unexceptional.Exceptional;
  
  final class InMemoryModuleReference extends ModuleReference {
  
  	private class InMemoryModuleReader implements ModuleReader {
  		@Override
  		public Stream<String> list() throws IOException
  		{
  			return list.stream();
  		}
  
  
  		@Override
  		public Optional<URI> find(String name) throws IOException
  		{
  			return list()
  					.filter(r -> r.startsWith(location().get().toString()))
  					.map(Exceptional::uri)
  					.filter(r -> r.toString().endsWith(name))
  					.findAny();
  		}
  
  
  		@Override
  		public void close()
  		{
  			/* NoOp */
  		}
  	}
  
  	private final Set<String> list;
  
  
  	InMemoryModuleReference(ModuleDescriptor descriptor, URI location, Set<String> list)
  	{
  		super(descriptor, location);
  		this.list = list;
  	}
  
  
  	@Override
  	public ModuleReader open() throws IOException
  	{
  		return new InMemoryModuleReader();
  	}
  }