001/* 002 * Copyright (c) 2007-2017 Xplenty, 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 }