org.eclipse.birt.data.engine.api.querydefn
Class JoinCondition

java.lang.Object
  org.eclipse.birt.data.engine.api.querydefn.JoinCondition

All Implemented Interfaces:

IJoinCondition

public class JoinCondition
extends java.lang.Object
implements IJoinCondition

An implementation of IJoinConditionExpression.

Field Summary

Fields inherited from interface org.eclipse.birt.data.engine.api.IJoinCondition

OP_EQ

Constructor Summary

JoinCondition(IScriptExpression left, IScriptExpression right, int op)
Constructor.

Method Summary

IScriptExpression	getLeftExpression() This method returns the IScriptExpression instance which will be evaluated against the data set which servers as left operand of a joint.
int	getOperator() This method returns the integer standing for a compare operator.
IScriptExpression	getRightExpression() This method returns the IScriptExpression instance which will be evaluated against the data set which servers as right operand of a joint.

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinCondition

public JoinCondition(IScriptExpression left,
                     IScriptExpression right,
                     int op)
              throws org.eclipse.birt.data.engine.core.DataException

Constructor.

Parameters:

left -

right -

op -

Throws:

org.eclipse.birt.data.engine.core.DataException

Method Detail

getLeftExpression

public IScriptExpression getLeftExpression()

Description copied from interface: IJoinCondition

This method returns the IScriptExpression instance which will be evaluated against the data set which servers as left operand of a joint.

Specified by:

getLeftExpression in interface IJoinCondition

Returns:

the expression servers as first operand of a joint.

getRightExpression

public IScriptExpression getRightExpression()

Description copied from interface: IJoinCondition

This method returns the IScriptExpression instance which will be evaluated against the data set which servers as right operand of a joint.

Specified by:

getRightExpression in interface IJoinCondition

Returns:

the expression servers as second operand of a joint.

getOperator

public int getOperator()

Description copied from interface: IJoinCondition

This method returns the integer standing for a compare operator. All supported compare operators are defined in this interface.

Specified by:

getOperator in interface IJoinCondition

Returns:

The operator specified using one of the OP_xxx enumeration values defined in this interface.