Examples of cascading.tuple.TupleEntrySchemeIterator

cascading.tuple.TupleEntrySchemeIterator
Class TupleEntrySchemeIterator is a helper class for wrapping a {@link Scheme} instance, calling{@link Scheme#source(cascading.flow.FlowProcess,cascading.scheme.SourceCall)} on every call to{@link #next()}. The behavior can be controlled via properties defined in {@link TupleEntrySchemeIteratorProps}.
Use this class inside a custom {@link cascading.tap.Tap} when overriding the{@link cascading.tap.Tap#openForRead(cascading.flow.FlowProcess)} method.

  protected TupleEntrySchemeIterator createTupleEntrySchemeIterator( FlowProcess<? extends Properties> flowProcess, Tap parent, String path, InputStream input ) throws FileNotFoundException
    {
    if( input == null )
      input = new FileInputStream( path );


    return new TupleEntrySchemeIterator( flowProcess, parent.getScheme(), input, path );
    }

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      reset( iterators );
      }


    private PartitionTupleEntryIterator createPartitionEntryIterator( FlowProcess<? extends Config> flowProcess, Input input, String parentIdentifier, String childIdentifier ) throws IOException
      {
      TupleEntrySchemeIterator schemeIterator = createTupleEntrySchemeIterator( flowProcess, parent, childIdentifier, input );


      return new PartitionTupleEntryIterator( getSourceFields(), partition, parentIdentifier, childIdentifier, schemeIterator );
      }

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Related Classes of cascading.tuple.TupleEntrySchemeIterator

cascading.scheme.ConcreteCall

cascading.tap.local.PartitionTap

cascading.tap.partition.BasePartitionTap$PartitionIterator

cascading.util.SingleCloseableInputIterator

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