javax.wbem.query
Class BinaryRelQueryExp

java.lang.Object
  |
  +--javax.wbem.query.QueryExp
        |
        +--javax.wbem.query.BinaryRelQueryExp

All Implemented Interfaces:

java.io.Serializable

public class BinaryRelQueryExp

extends QueryExp

Class representing binary relations between non-boolean operands.

     v1 relop v2, where

     relop is <, >, <=, >=, ==, like, not like
 

Since:

WBEM 1.0

Constructor Summary

BinaryRelQueryExp()
Empty constructor.

BinaryRelQueryExp(int op, ValueExp v1, ValueExp v2)
Constructor for binary relations.

Method Summary

boolean	apply(CIMElement obj) returns true if the 'columns' of the input 'row' satisfy the binary relation.
ValueExp	getLeftValue() Accessor for left value
int	getOperator() Accessor for the relational operation
ValueExp	getRightValue() Accessor for right value
java.lang.String	toString()

Methods inherited from class javax.wbem.query.QueryExp

canonizeCOD, canonizeDOC

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

BinaryRelQueryExp

public BinaryRelQueryExp(int op,
                         ValueExp v1,
                         ValueExp v2)

Constructor for binary relations.

Parameters:

op - Represents the relation between operands.

v1 - The left valueExp. It is assumed that the left value is always a attribute.

v2 - The right valueExp. It is assumed that the right value is a constant value expression like StringValueExp.

BinaryRelQueryExp

public BinaryRelQueryExp()

Empty constructor.

Method Detail

getOperator

public int getOperator()

Accessor for the relational operation

getLeftValue

public ValueExp getLeftValue()

Accessor for left value

getRightValue

public ValueExp getRightValue()

Accessor for right value

apply

public boolean apply(CIMElement obj)
              throws CIMException

returns true if the 'columns' of the input 'row' satisfy the binary relation. The only supported input element is a CIMInstance. This method extracts the attribute in CIMInstance associated with the leftValue attribute and applies the relation operation with the rightValue

Overrides:

apply in class QueryExp

Parameters:

CIMElement - - the input row. Only CIMInstance is supported.

Returns:

boolean true if the input element satisfy the binary relation false otherwise.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object