com.eteks.parser.node
Class UnaryOperatorNode

java.lang.Object
  |
  +--com.eteks.parser.node.ConstantNode
        |
        +--com.eteks.parser.node.UnaryOperatorNode

All Implemented Interfaces:

ExpressionNode, ParameterizedNode, java.io.Serializable

public class UnaryOperatorNode

extends ConstantNode

implements ParameterizedNode

Node matching an unary operator.

Since:

Jeks 1.0

Version:

1.0

Author:

Emmanuel Puybaret

See Also:

Serialized Form

Fields inherited from class com.eteks.parser.node.ConstantNode

FALSE_DOUBLE, TRUE_DOUBLE

Constructor Summary

UnaryOperatorNode(java.lang.Object operatorKey)
Creates the node of an unary operator.

Method Summary

void	addParameter(ExpressionNode operand) Stores the operand of this operator.
double	computeExpression(double[] parametersValue) Returns the double value of this operator node operating on it operand.
java.lang.Object	computeExpression(Interpreter interpreter, java.lang.Object[] parametersValue) Returns the value returned by the getUnaryOperatorValue () method of interpreter with the key of this operator and the computed value of its operand as parameters.
ExpressionNode	getOperand() Returns the node matching the operand.
int	getParameterCount() Returns the current count of parameters or operands stored by this node.

Methods inherited from class com.eteks.parser.node.ConstantNode

getKey

Methods inherited from class java.lang.Object

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

Constructor Detail

UnaryOperatorNode

public UnaryOperatorNode(java.lang.Object operatorKey)

Creates the node of an unary operator.

Parameters:

operatorKey - the key of an unary operator of Syntax.

Method Detail

addParameter

public void addParameter(ExpressionNode operand)

Stores the operand of this operator.

Specified by:

addParameter in interface ParameterizedNode

Following copied from interface: com.eteks.parser.node.ParameterizedNode

Parameters:

parameter - the node of an expression used as parameter or operand.

getParameterCount

public int getParameterCount()

Description copied from interface: ParameterizedNode

Returns the current count of parameters or operands stored by this node.

Specified by:

getParameterCount in interface ParameterizedNode

Following copied from interface: com.eteks.parser.node.ParameterizedNode

Returns:

the count of parameters of this node.

getOperand

public ExpressionNode getOperand()

Returns the node matching the operand.

Returns:

the node of an expression.

computeExpression

public java.lang.Object computeExpression(Interpreter interpreter,
                                          java.lang.Object[] parametersValue)

Returns the value returned by the getUnaryOperatorValue () method of interpreter with the key of this operator and the computed value of its operand as parameters.

Specified by:

computeExpression in interface ExpressionNode

Overrides:

computeExpression in class ConstantNode

Parameters:

interpreter - runtime interpreter.

parametersValue - the value of parameters passed to compute a compiled function.

Returns:

the computed value of this operator. The type of the returned value depends on the implementation of the interpreter.

See Also:

Interpreter.getUnaryOperatorValue(java.lang.Object, java.lang.Object)

computeExpression

public double computeExpression(double[] parametersValue)

Returns the double value of this operator node operating on it operand.

Specified by:

computeExpression in interface ExpressionNode

Overrides:

computeExpression in class ConstantNode

Parameters:

parametersValue - the value of parameters passed to compute a compiled function.

Returns:

the value of this operator.