org.apache.pig.impl.eval
Class FilterSpec

java.lang.Object
  extended by org.apache.pig.impl.eval.EvalSpec
      extended by org.apache.pig.impl.eval.FilterSpec
All Implemented Interfaces:
Serializable

public class FilterSpec
extends EvalSpec

See Also:
Serialized Form

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.pig.impl.eval.EvalSpec
EvalSpec.UserComparator
 
Field Summary
 Cond cond
           
 
Fields inherited from class org.apache.pig.impl.eval.EvalSpec
inner, properties
 
Constructor Summary
FilterSpec(Cond cond)
           
 
Method Summary
 List<String> getFuncs()
          Get the functions required by this spec
 void instantiateFunc(FunctionInstantiator instantiaor)
           
protected  Schema mapInputSchema(Schema schema)
          Given an input schema, determine the output schema of this spec as it operates on input tuples with the input schema.
protected  DataCollector setupDefaultPipe(Properties properties, DataCollector endOfPipe)
          set up a default data processing pipe for processing by this spec This pipe does not include unflattening/flattening at the end
 String toString()
           
 void visit(EvalSpecVisitor v)
           
 
Methods inherited from class org.apache.pig.impl.eval.EvalSpec
addSpec, copy, finish, getCombiner, getComparator, getComparatorName, getLineage, getOutputSchemaForPipe, getProperties, isAsynchronous, isFlattened, isInner, setComparatorName, setFlatten, setInner, setLineageTracer, setSchema, setupPipe, simpleEval
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

cond

public Cond cond
Constructor Detail

FilterSpec

public FilterSpec(Cond cond)
Method Detail

getFuncs

public List<String> getFuncs()
Description copied from class: EvalSpec
Get the functions required by this spec

Specified by:
getFuncs in class EvalSpec
Returns:

mapInputSchema

protected Schema mapInputSchema(Schema schema)
Description copied from class: EvalSpec
Given an input schema, determine the output schema of this spec as it operates on input tuples with the input schema.

Specified by:
mapInputSchema in class EvalSpec
Returns:

setupDefaultPipe

protected DataCollector setupDefaultPipe(Properties properties,
                                         DataCollector endOfPipe)
Description copied from class: EvalSpec
set up a default data processing pipe for processing by this spec This pipe does not include unflattening/flattening at the end

Specified by:
setupDefaultPipe in class EvalSpec
Parameters:
properties - properties for the pipe
endOfPipe - The collector where output is desired
Returns:
The collector where input tuples should be put

toString

public String toString()
Overrides:
toString in class Object

instantiateFunc

public void instantiateFunc(FunctionInstantiator instantiaor)
                     throws IOException
Overrides:
instantiateFunc in class EvalSpec
Throws:
IOException

visit

public void visit(EvalSpecVisitor v)
Specified by:
visit in class EvalSpec


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