org.apache.hadoop.hbase.client.coprocessor

Class AggregationHelper

java.lang.Object

org.apache.hadoop.hbase.client.coprocessor.AggregationHelper

@InterfaceAudience.Private
public final class AggregationHelper
extends Object

Helper class for constructing aggregation request and response.

Method Summary

Modifier and Type	Method and Description
static <T extends Message> T	getParsedGenericInstance(Class<?> runtimeClass, int position, ByteString b) Get an instance of the argument type declared in a class's signature.

Methods inherited from class java.lang.Object

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

Method Detail

getParsedGenericInstance

public static <T extends Message> T getParsedGenericInstance(Class<?> runtimeClass,
                                                             int position,
                                                             ByteString b)
                                                      throws IOException

Get an instance of the argument type declared in a class's signature. The argument type is assumed to be a PB Message subclass, and the instance is created using parseFrom method on the passed ByteString.

Parameters:

runtimeClass - the runtime type of the class

position - the position of the argument in the class declaration

b - the ByteString which should be parsed to get the instance created

Returns:

the instance

Throws:

IOException - Either we couldn't instantiate the method object, or "parseFrom" failed.