org.apache.lens.cube.metadata

Class JoinChain

java.lang.Object

org.apache.lens.cube.metadata.JoinChain

All Implemented Interfaces:

Named

public class JoinChain
extends Object
implements Named

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JoinChain.Edge
static class	JoinChain.Path

Constructor Summary

Constructors

Constructor and Description
JoinChain(AbstractCubeTable table, String name) This is used only for serializing
JoinChain(JoinChain other) Copy constructor for JoinChain
JoinChain(String name, String display, String description) Construct join chain

Method Summary

Methods

Modifier and Type	Method and Description
void	addPath(List<TableReference> refs)
void	addProperties(AbstractCubeTable tbl)
void	addProperties(Cube cube)
void	addProperties(Dimension dimension)
String	getDestTable() Get final destination table
Set<String>	getIntermediateDimensions() Get all dimensions involved in paths, except destination table
List<SchemaGraph.JoinPath>	getRelationEdges(CubeMetastoreClient client) Convert join paths to schemaGraph's JoinPath
Set<String>	getSourceColumns() Get all source columns from cube

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lens.cube.metadata.Named

getName

Constructor Detail

JoinChain

public JoinChain(String name,
         String display,
         String description)

Construct join chain

Parameters:

name -

display -

description -

JoinChain

public JoinChain(AbstractCubeTable table,
         String name)

This is used only for serializing

Parameters:

table -

name -

JoinChain

public JoinChain(JoinChain other)

Copy constructor for JoinChain

Parameters:

other - JoinChain

Method Detail

addProperties

public void addProperties(AbstractCubeTable tbl)

addProperties

public void addProperties(Cube cube)

addProperties

public void addProperties(Dimension dimension)

addPath

public void addPath(List<TableReference> refs)

getDestTable

public String getDestTable()

Get final destination table

Returns:

getSourceColumns

public Set<String> getSourceColumns()

Get all source columns from cube

Returns:

getIntermediateDimensions

public Set<String> getIntermediateDimensions()

Get all dimensions involved in paths, except destination table

Returns:

getRelationEdges

public List<SchemaGraph.JoinPath> getRelationEdges(CubeMetastoreClient client)
                                            throws org.apache.hadoop.hive.ql.metadata.HiveException

Convert join paths to schemaGraph's JoinPath

Parameters:

client -

Returns:

List<SchemaGraph.JoinPath>

Throws:

org.apache.hadoop.hive.ql.metadata.HiveException