com.h3c.util.persistence.cassandra.query

Class DeleteQuery<I extends Serializable,T extends TransportObject<? super T,I>,C>

java.lang.Object

com.h3c.util.persistence.cassandra.query.DeleteQuery<I,T,C>

Type Parameters:

I - Id of the object that needs to be deleted.

T - Type of the TransportObject

C - Type of Context to execute the query.

All Implemented Interfaces:

WriteQuery<Boolean,C>

public class DeleteQuery<I extends Serializable,T extends TransportObject<? super T,I>,C>
extends Object
implements WriteQuery<Boolean,C>

DeleteQuery used to delete an entry from a ColumnFamily/Table in a database.

Constructor Summary

Constructors

Constructor and Description
DeleteQuery(Id<T,I> id, Dao<I,T,?,?,?,C> dao) Query to delete specific entry from a table/ColumnFamily.

Method Summary

Methods

Modifier and Type	Method and Description
Boolean	execute(C context) Execute the delete operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

DeleteQuery

public DeleteQuery(Id<T,I> id,
           Dao<I,T,?,?,?,C> dao)

Query to delete specific entry from a table/ColumnFamily.

Parameters:

id - Id of the data row to be deleted.

dao - dao to be used for delete operation.

Method Detail

execute

public Boolean execute(C context)
                throws Exception

Execute the delete operation.

Specified by:

execute in interface WriteQuery<Boolean,C>

Parameters:

context - Context to execute the query

Returns:

result of Delete operation(TRUE/FALSE).

Throws:

NullPointerException - In case of context is null.

Exception - Throws Exception in case of any error in query execute.