    001    /*
    002     * Copyright (c) 2007-2014 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
    021    package cascading.tap.local;
    022
    023    import java.io.IOException;
    024    import java.io.InputStream;
    025    import java.util.Properties;
    026
    027    import cascading.flow.FlowProcess;
    028    import cascading.scheme.Scheme;
    029    import cascading.tap.SourceTap;
    030    import cascading.tuple.TupleEntryIterator;
    031    import cascading.tuple.TupleEntrySchemeIterator;
    032
    033    /** Class StdInTap provides a local mode tap for reading data from the {@code stdin} stream. */
    034    public 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<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      }