Class ConcatOperator
- java.lang.Object
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- org.pentaho.reporting.libraries.formula.operators.ConcatOperator
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- All Implemented Interfaces:
Serializable
,InfixOperator
public class ConcatOperator extends Object implements InfixOperator
Concats two strings operator.- Author:
- Thomas Morgner
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description ConcatOperator()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description TypeValuePair
evaluate(FormulaContext context, TypeValuePair value1, TypeValuePair value2)
Evaluates the comptuation for both parameters.int
getLevel()
boolean
isAssociative()
Defines, whether the operation is associative.boolean
isLeftOperation()
Defines the bind-direction of the operator.String
toString()
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Method Detail
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evaluate
public TypeValuePair evaluate(FormulaContext context, TypeValuePair value1, TypeValuePair value2) throws EvaluationException
Description copied from interface:InfixOperator
Evaluates the comptuation for both parameters. This method must never return null.- Specified by:
evaluate
in interfaceInfixOperator
- Returns:
- Throws:
EvaluationException
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getLevel
public int getLevel()
- Specified by:
getLevel
in interfaceInfixOperator
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isLeftOperation
public boolean isLeftOperation()
Description copied from interface:InfixOperator
Defines the bind-direction of the operator. That direction defines, in which direction a sequence of equal operators is resolved.- Specified by:
isLeftOperation
in interfaceInfixOperator
- Returns:
- true, if the operation is left-binding, false if right-binding
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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).- Specified by:
isAssociative
in interfaceInfixOperator
- Returns:
- true, if the operation is associative, false otherwise
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