com.eteks.jeks
Class JeksInterpreter

java.lang.Object
  |
  +--com.eteks.parser.DoubleInterpreter
        |
        +--com.eteks.parser.WrapperInterpreter
              |
              +--com.eteks.jeks.JeksInterpreter

All Implemented Interfaces:

Interpreter

public class JeksInterpreter

extends WrapperInterpreter

Interpreter used to compute cell values. This interpreter interprets null cell values as 0.

Since:

Jeks 1.0

Version:

1.0

Author:

Emmanuel Puybaret

Field Summary

static java.lang.Object

NULL_VALUE

Fields inherited from class com.eteks.parser.DoubleInterpreter

FALSE_DOUBLE, TRUE_DOUBLE

Constructor Summary

JeksInterpreter()
Creates an interpreter.

Method Summary

java.lang.Object	getBinaryOperatorValue(java.lang.Object binaryOperatorKey, java.lang.Object param1, java.lang.Object param2) Returns the value of the operation of the binary operator binaryOperatorKey applied on the two operands operand1 and operand2.
java.lang.Object	getCommonFunctionValue(java.lang.Object commonFunctionKey, java.lang.Object param) Returns the value of the common function commonFunctionKey with the parameter param.
java.lang.Object	getParameterValue(java.lang.Object parameter) Returns parameter if it's null an instance of Number, String, Character, Boolean, Date or Object [][].
java.lang.Object	getUnaryOperatorValue(java.lang.Object unaryOperatorKey, java.lang.Object param) Returns the value of the operation of the unary operator unaryOperatorKey applied on the operand operand.
boolean	isTrue(java.lang.Object param) Returns true if param is an instance of Number different of 0, or if param is a true Boolean object.

Methods inherited from class com.eteks.parser.WrapperInterpreter

getConstantValue, getLiteralValue

Methods inherited from class com.eteks.parser.DoubleInterpreter

getConditionValue, getFunctionValue, supportsRecursiveCall

Methods inherited from class java.lang.Object

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

Field Detail

NULL_VALUE

public static final java.lang.Object NULL_VALUE

Constructor Detail

JeksInterpreter

public JeksInterpreter()

Creates an interpreter.

Method Detail

isTrue

public boolean isTrue(java.lang.Object param)

Returns true if param is an instance of Number different of 0, or if param is a true Boolean object. If param is null, this method returns false.

Overrides:

isTrue in class WrapperInterpreter

Following copied from class: com.eteks.parser.WrapperInterpreter

Parameters:

condition - the value to test (instance of Boolean).

Returns:

the boolean value of condition.

getParameterValue

public java.lang.Object getParameterValue(java.lang.Object parameter)

Returns parameter if it's null an instance of Number, String, Character, Boolean, Date or Object [][].

Overrides:

getParameterValue in class WrapperInterpreter

Parameters:

parameter - the computed parameter to evaluate.

Throws:

java.lang.IllegalArgumentException - if parameter class isn't allowed.

getUnaryOperatorValue

public java.lang.Object getUnaryOperatorValue(java.lang.Object unaryOperatorKey,
                                              java.lang.Object param)

Description copied from class: WrapperInterpreter

Returns the value of the operation of the unary operator unaryOperatorKey applied on the operand operand. unaryOperatorKey must be the key of an unary operator of Syntax (one of OPERATOR_POSITIVE, OPERATOR_OPPOSITE, OPERATOR_LOGICAL_NOT, OPERATOR_BITWISE_NOT).

Overrides:

getUnaryOperatorValue in class WrapperInterpreter

Following copied from class: com.eteks.parser.WrapperInterpreter

Parameters:

unaryOperatorKey - the key of an unary operator of Syntax.

operand - the operand.

Returns:

the result of the operation. The returned value is an instance of Double, Long or Boolean.

Throws:

java.lang.IllegalArgumentException - if operand isn't of the good type for the requested operator or if unaryOperatorKey isn't the key of an unary operator of Syntax.

getBinaryOperatorValue

public java.lang.Object getBinaryOperatorValue(java.lang.Object binaryOperatorKey,
                                               java.lang.Object param1,
                                               java.lang.Object param2)

Description copied from class: WrapperInterpreter

Returns the value of the operation of the binary operator binaryOperatorKey applied on the two operands operand1 and operand2. binaryOperatorKey must be the key of a binary operator of Syntax (one of OPERATOR_ADD, OPERATOR_SUBSTRACT, OPERATOR_MULTIPLY, OPERATOR_DIVIDE,...).

Overrides:

getBinaryOperatorValue in class WrapperInterpreter

Following copied from class: com.eteks.parser.WrapperInterpreter

Parameters:

binaryOperatorKey - the key of a binary operator of Syntax.

operand1 - the first operand.

operand2 - the second operand.

Returns:

the result of the operation. The returned value is an instance of Double, Long, Boolean or String.

Throws:

java.lang.IllegalArgumentException - if operand1 and operand2 aren't of the good type for requested operator or if binaryOperatorKey isn't the key of a binary operator of Syntax.

getCommonFunctionValue

public java.lang.Object getCommonFunctionValue(java.lang.Object commonFunctionKey,
                                               java.lang.Object param)

Description copied from class: WrapperInterpreter

Returns the value of the common function commonFunctionKey with the parameter param. commonFunctionKey must be the key of a commomon function of Syntax (one of FUNCTION_LN, FUNCTION_LOG, FUNCTION_EXP, FUNCTION_SQR,...).

Overrides:

getCommonFunctionValue in class WrapperInterpreter

Following copied from class: com.eteks.parser.WrapperInterpreter

Parameters:

commonFunctionKey - the key of a common function of Syntax.

param - the parameter of the function.

Returns:

the result of the function. The returned value is an instance of Double, Long or Boolean.

Throws:

java.lang.IllegalArgumentException - if param isn't of the good type for the requested function or if commonFunctionKey isn't the key of a commomon function of Syntax.