001    /*
002     * Copyright (c) 2007-2015 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      }