org.objectweb.medor.datasource.lib
Class TCWrapper

java.lang.Object
  org.objectweb.medor.datasource.lib.TCWrapper

All Implemented Interfaces:

Wrapper

public class TCWrapper

extends java.lang.Object

implements Wrapper

Constructor Summary

TCWrapper()

Method Summary

TupleCollection

fetchData(QueryLeaf ql, ParameterOperand[] parameters, java.lang.Object conn, EvaluationMetaData evalmd) This method links the wrapper to a particular QueryLeaf, and executes the query on the underlying data store.

Methods inherited from class java.lang.Object

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

Constructor Detail

TCWrapper

public TCWrapper()

Method Detail

fetchData

public TupleCollection fetchData(QueryLeaf ql,
                                 ParameterOperand[] parameters,
                                 java.lang.Object conn,
                                 EvaluationMetaData evalmd)
                          throws EvaluationException

Description copied from interface: Wrapper

This method links the wrapper to a particular QueryLeaf, and executes the query on the underlying data store.

Specified by:

fetchData in interface Wrapper

Parameters:

ql - the QueryLeaf

parameters - the parameters necessary for obtaining data from the QueryLeaf (in the case the QueryLeaf contains an expression)

conn - an Object which contains information for connecting to the DataStore behind the QueryLeaf (could be a JDBC connection, ...)s

Returns:

the TupleCollection containing the result of the execution.

Throws:

EvaluationException - in case of problems during the evaluation.