org.apache.pig.data
Class SchemaTupleClassGenerator

java.lang.Object
  org.apache.pig.data.SchemaTupleClassGenerator

@InterfaceAudience.Private
@InterfaceStability.Unstable
public class SchemaTupleClassGenerator
extends Object

This class encapsulates the generation of SchemaTuples, as well as some logic around shipping code to the distributed cache.

Nested Class Summary

static class

SchemaTupleClassGenerator.GenContext The GenContext mechanism provides a level of control in where SchemaTupleFactories are used.

Method Summary

protected static void	generateSchemaTuple(Schema s, boolean appendable, int id, File codeDir, SchemaTupleClassGenerator.GenContext... contexts) This class actually generates the code for a given Schema.
protected static int	getNextGlobalClassIdentifier()
protected static void	resetGlobalClassIdentifier()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

resetGlobalClassIdentifier

protected static void resetGlobalClassIdentifier()

generateSchemaTuple

protected static void generateSchemaTuple(Schema s,
                                          boolean appendable,
                                          int id,
                                          File codeDir,
                                          SchemaTupleClassGenerator.GenContext... contexts)

This class actually generates the code for a given Schema.

Parameters:

s - as Schema

appendable - as boolean, true or false depending on whether it should be appendable

id - as int, id means identifier

contexts - which are a list of contexts in which the SchemaTuple is intended to be instantiated

getNextGlobalClassIdentifier

protected static int getNextGlobalClassIdentifier()