org.apache.hawq.pxf.plugins.hbase.utilities

Class HBaseColumnDescriptor

java.lang.Object

org.apache.hawq.pxf.api.utilities.ColumnDescriptor

org.apache.hawq.pxf.plugins.hbase.utilities.HBaseColumnDescriptor

public class HBaseColumnDescriptor
extends ColumnDescriptor

ColumnDescriptor for HBase columns.

Field Summary

Fields inherited from class org.apache.hawq.pxf.api.utilities.ColumnDescriptor

RECORD_KEY_NAME

Constructor Summary

Constructors

Constructor and Description
HBaseColumnDescriptor(ColumnDescriptor copy) Constructs a column descriptor using the given copy's column name.
HBaseColumnDescriptor(ColumnDescriptor copy, byte[] newColumnName) Constructs an HBase column descriptor from a generic column descriptor and an HBase column name.

Method Summary

Modifier and Type	Method and Description
byte[]	columnFamilyBytes() Returns the family column name.
byte[]	qualifierBytes() Returns the qualifier column name.

Methods inherited from class org.apache.hawq.pxf.api.utilities.ColumnDescriptor

columnIndex, columnName, columnTypeCode, columnTypeName, isKeyColumn, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

HBaseColumnDescriptor

public HBaseColumnDescriptor(ColumnDescriptor copy)

Constructs a column descriptor using the given copy's column name.

Parameters:

copy - column descriptor to be copied

HBaseColumnDescriptor

public HBaseColumnDescriptor(ColumnDescriptor copy,
                             byte[] newColumnName)

Constructs an HBase column descriptor from a generic column descriptor and an HBase column name.

The column name must be in either of the following forms:

1. columnfamily:qualifier - standard HBase column.
2. recordkey - Row key column (case insensitive).

For recordkey, no HBase name is created.

Parameters:

copy - column descriptor

newColumnName - HBase column name - can be different than the given column descriptor name.

Method Detail

columnFamilyBytes

public byte[] columnFamilyBytes()

Returns the family column name. (E.g. "cf1:q2" will return "cf1")

Returns:

family column name

qualifierBytes

public byte[] qualifierBytes()

Returns the qualifier column name. (E.g. "cf1:q2" will return "q2")

Returns:

qualifier column name