com.impetus.client.cassandra.thrift

Class ThriftDataResultHelper

java.lang.Object

com.impetus.client.cassandra.thrift.ThriftDataResultHelper

public class ThriftDataResultHelper
extends Object

Provides utility methods for extracting useful data from Thrift result retrieved from database (usually in the form of ColumnOrSuperColumn.

Author:

amresh.singh

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ThriftDataResultHelper.ColumnFamilyType The Enum ColumnFamilyType.

Constructor Summary

Constructors

Constructor and Description
ThriftDataResultHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static List<Object>	getRowKeys(List<org.apache.cassandra.thrift.KeySlice> keySlices, EntityMetadata metadata) Fetches Row keys from a List of KeySlice.
static <T> T	transformThriftResult(org.apache.cassandra.thrift.ColumnOrSuperColumn cosc, ThriftDataResultHelper.ColumnFamilyType columnFamilyType, ThriftRow row) Transform thrift result.
static <T> List<T>	transformThriftResult(List<org.apache.cassandra.thrift.ColumnOrSuperColumn> coscList, ThriftDataResultHelper.ColumnFamilyType columnFamilyType, ThriftRow row) Transforms data retrieved as result via thrift to a List whose content type is determined by ThriftDataResultHelper.ColumnFamilyType.
static <T> Map<ByteBuffer,List<T>>	transformThriftResult(Map<ByteBuffer,List<org.apache.cassandra.thrift.ColumnOrSuperColumn>> coscResultMap, ThriftDataResultHelper.ColumnFamilyType columnFamilyType, ThriftRow row) Transforms data retrieved as result via thrift to a Map whose content type is determined by ThriftDataResultHelper.ColumnFamilyType.
static <T> Map<ByteBuffer,List<T>>	transformThriftResult(ThriftDataResultHelper.ColumnFamilyType columnFamilyType, List<org.apache.cassandra.thrift.KeySlice> keySlices, ThriftRow row) Transform thrift result.
<T> List<T>	transformThriftResultAndAddToList(Map<ByteBuffer,List<org.apache.cassandra.thrift.ColumnOrSuperColumn>> coscResultMap, ThriftDataResultHelper.ColumnFamilyType columnFamilyType, ThriftRow row) Transforms data retrieved as result via thrift to a List whose content type is determined by ThriftDataResultHelper.ColumnFamilyType.
ThriftRow	translateToThriftRow(Map<ByteBuffer,List<org.apache.cassandra.thrift.ColumnOrSuperColumn>> coscResultMap, boolean isCounterType, EntityMetadata.Type columnFamilyType, ThriftRow row) Translates into thrift row.

Methods inherited from class java.lang.Object

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

Constructor Detail

ThriftDataResultHelper

public ThriftDataResultHelper()

Method Detail

transformThriftResult

public static <T> List<T> transformThriftResult(List<org.apache.cassandra.thrift.ColumnOrSuperColumn> coscList,
                                ThriftDataResultHelper.ColumnFamilyType columnFamilyType,
                                ThriftRow row)

Transforms data retrieved as result via thrift to a List whose content type is determined by ThriftDataResultHelper.ColumnFamilyType.

Type Parameters:

T - the generic type

Parameters:

coscList - the cosc list

columnFamilyType - the column family type

row - the row

Returns:

the list

transformThriftResult

public static <T> T transformThriftResult(org.apache.cassandra.thrift.ColumnOrSuperColumn cosc,
                          ThriftDataResultHelper.ColumnFamilyType columnFamilyType,
                          ThriftRow row)

Transform thrift result.

Type Parameters:

T - the generic type

Parameters:

cosc - the cosc

columnFamilyType - the column family type

row - the row

Returns:

the t

transformThriftResult

public static <T> Map<ByteBuffer,List<T>> transformThriftResult(Map<ByteBuffer,List<org.apache.cassandra.thrift.ColumnOrSuperColumn>> coscResultMap,
                                                ThriftDataResultHelper.ColumnFamilyType columnFamilyType,
                                                ThriftRow row)

Transforms data retrieved as result via thrift to a Map whose content type is determined by ThriftDataResultHelper.ColumnFamilyType.

Type Parameters:

T - the generic type

Parameters:

coscResultMap - the cosc result map

columnFamilyType - the column family type

row - the row

Returns:

the map

transformThriftResult

public static <T> Map<ByteBuffer,List<T>> transformThriftResult(ThriftDataResultHelper.ColumnFamilyType columnFamilyType,
                                                List<org.apache.cassandra.thrift.KeySlice> keySlices,
                                                ThriftRow row)

Transform thrift result.

Type Parameters:

T - the generic type

Parameters:

columnFamilyType - the column family type

keySlices - the key slices

row - the row

Returns:

the map

transformThriftResultAndAddToList

public <T> List<T> transformThriftResultAndAddToList(Map<ByteBuffer,List<org.apache.cassandra.thrift.ColumnOrSuperColumn>> coscResultMap,
                                            ThriftDataResultHelper.ColumnFamilyType columnFamilyType,
                                            ThriftRow row)

Transforms data retrieved as result via thrift to a List whose content type is determined by ThriftDataResultHelper.ColumnFamilyType.

Type Parameters:

T - the generic type

Parameters:

coscResultMap - the cosc result map

columnFamilyType - the column family type

row - the row

Returns:

the list

translateToThriftRow

public ThriftRow translateToThriftRow(Map<ByteBuffer,List<org.apache.cassandra.thrift.ColumnOrSuperColumn>> coscResultMap,
                             boolean isCounterType,
                             EntityMetadata.Type columnFamilyType,
                             ThriftRow row)

Translates into thrift row.

Parameters:

coscResultMap - the cosc result map

isCounterType - the is counter type

columnFamilyType - the column family type

row - the row

Returns:

the thrift row

getRowKeys

public static List<Object> getRowKeys(List<org.apache.cassandra.thrift.KeySlice> keySlices,
                      EntityMetadata metadata)

Fetches Row keys from a List of KeySlice.

Parameters:

keySlices - the key slices

metadata - the metadata

Returns:

the row keys