    001/*
    002 * Copyright (c) 2007-2016 Concurrent, Inc. All Rights Reserved.
    003 *
    004 * Project and contact information: http://www.cascading.org/
    005 *
    006 * This file is part of the Cascading project.
    007 *
    008 * Licensed under the Apache License, Version 2.0 (the "License");
    009 * you may not use this file except in compliance with the License.
    010 * You may obtain a copy of the License at
    011 *
    012 *     http://www.apache.org/licenses/LICENSE-2.0
    013 *
    014 * Unless required by applicable law or agreed to in writing, software
    015 * distributed under the License is distributed on an "AS IS" BASIS,
    016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    017 * See the License for the specific language governing permissions and
    018 * limitations under the License.
    019 */
    020
    021package cascading.tap.local;
    022
    023import java.io.IOException;
    024import java.io.InputStream;
    025import java.util.Properties;
    026
    027import cascading.flow.FlowProcess;
    028import cascading.scheme.Scheme;
    029import cascading.tap.SourceTap;
    030import cascading.tuple.TupleEntryIterator;
    031import cascading.tuple.TupleEntrySchemeIterator;
    032
    033/** Class StdInTap provides a local mode tap for reading data from the {@code stdin} stream. */
    034public class StdInTap extends SourceTap<Properties, InputStream>
    035  {
    036  public StdInTap( Scheme<Properties, InputStream, ?, ?, ?> scheme )
    037    {
    038    super( scheme );
    039    }
    040
    041  @Override
    042  public String getIdentifier()
    043    {
    044    return "stdIn";
    045    }
    046
    047  @Override
    048  public TupleEntryIterator openForRead( FlowProcess<? extends Properties> flowProcess, InputStream inputStream ) throws IOException
    049    {
    050    return new TupleEntrySchemeIterator<Properties, InputStream>( flowProcess, getScheme(), System.in );
    051    }
    052
    053  @Override
    054  public boolean resourceExists( Properties conf ) throws IOException
    055    {
    056    return true;
    057    }
    058
    059  @Override
    060  public long getModifiedTime( Properties conf ) throws IOException
    061    {
    062    return System.currentTimeMillis();
    063    }
    064  }