org.pentaho.reporting.libraries.formula.operators

Class ConcatOperator

public class ConcatOperator extends Object implements InfixOperator

Concats two strings operator.

Author: Thomas Morgner

Constructor Summary
ConcatOperator()
Method Summary
TypeValuePairevaluate(FormulaContext context, TypeValuePair value1, TypeValuePair value2)
intgetLevel()
booleanisAssociative()
Defines, whether the operation is associative.
booleanisLeftOperation()
StringtoString()

Constructor Detail

ConcatOperator

public ConcatOperator()

Method Detail

evaluate

public TypeValuePair evaluate(FormulaContext context, TypeValuePair value1, TypeValuePair value2)

getLevel

public int getLevel()

isAssociative

public boolean isAssociative()
Defines, whether the operation is associative. For associative operations, the evaluation order does not matter, if the operation appears more than once in an expression, and therefore we can optimize them a lot better than non-associative operations (ie. merge constant parts and precompute them once).

Returns: true, if the operation is associative, false otherwise

isLeftOperation

public boolean isLeftOperation()

toString

public String toString()