org.pentaho.reporting.libraries.formula.lvalues

Class ContextLookup

java.lang.Object

org.pentaho.reporting.libraries.formula.lvalues.AbstractLValue

org.pentaho.reporting.libraries.formula.lvalues.ContextLookup

All Implemented Interfaces:

Serializable, Cloneable, LValue

public class ContextLookup
extends AbstractLValue

A reference that queries the datarow.

Author:

Thomas Morgner

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ContextLookup(String name)
ContextLookup(String name, ParsePosition parsePosition)

Method Summary

Methods

Modifier and Type	Method and Description
TypeValuePair	evaluate()
String	getName()
Type	getValueType() Querying the value type is only valid *after* the value has been evaluated.
boolean	isConstant() Checks whether the LValue is constant.
String	toString()

Methods inherited from class org.pentaho.reporting.libraries.formula.lvalues.AbstractLValue

clone, getChildValues, getContext, getParsePosition, initialize, setParsePosition

Methods inherited from class java.lang.Object

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

Constructor Detail

ContextLookup

public ContextLookup(String name)

ContextLookup

public ContextLookup(String name,
             ParsePosition parsePosition)

Method Detail

evaluate

public TypeValuePair evaluate()
                       throws EvaluationException

Throws:

EvaluationException

getValueType

public Type getValueType()

Description copied from class: AbstractLValue

Querying the value type is only valid *after* the value has been evaluated.

Specified by:

getValueType in interface LValue

Overrides:

getValueType in class AbstractLValue

Returns:

toString

public String toString()

Overrides:

toString in class Object

isConstant

public boolean isConstant()

Checks whether the LValue is constant. Constant lvalues always return the same value.

Returns:

getName

public String getName()