//===========================================================================//=-------------------------------------------------------------------------=//= Module history:                                                         =//= - October 14 2007 - Oscar Chavarro: Original base version               =//===========================================================================package vsdk.toolkit.common;public class _AlgebraicExpressionUnaryOperatorNode extends _AlgebraicExpressionNode{    /// Check the general attribute description in superclass Entity.    public static final long serialVersionUID = 20071014L;    private AlgebraicExpression parent;    private String operatorName;    private _AlgebraicExpressionNode operand;    public _AlgebraicExpressionUnaryOperatorNode(AlgebraicExpression parent, String operatorName)    {        this.parent = parent;        this.operatorName = operatorName;        operand = null;    }    public void setOperand(_AlgebraicExpressionNode operand)    {        this.operand = operand;    }    public double eval() throws AlgebraicExpressionException    {        double operandValue = operand.eval();        double val = Double.NaN;        if ( operatorName.equals("sin") ) {            val = Math.sin(operandValue);	}        else if ( operatorName.equals("cos") ) {            val = Math.cos(operandValue);	}        else if ( operatorName.equals("tan") ) {            val = Math.tan(operandValue);	}        else if ( operatorName.equals("asin") ) {            val = Math.asin(operandValue);	}        else if ( operatorName.equals("acos") ) {            val = Math.acos(operandValue);	}        else if ( operatorName.equals("atan") ) {            val = Math.atan(operandValue);	}        else if ( operatorName.equals("abs") ) {            val = Math.abs(operandValue);	}        else if ( operatorName.equals("cbrt") ) {            val = Math.cbrt(operandValue);	}        else if ( operatorName.equals("ceil") ) {            val = Math.ceil(operandValue);	}        else if ( operatorName.equals("sinh") ) {            val = Math.sinh(operandValue);	}        else if ( operatorName.equals("cosh") ) {            val = Math.cosh(operandValue);	}        else if ( operatorName.equals("tanh") ) {            val = Math.tanh(operandValue);	}        else if ( operatorName.equals("toDegrees") ) {            val = Math.toDegrees(operandValue);	}        else if ( operatorName.equals("toRadians") ) {            val = Math.toRadians(operandValue);	}        else if ( operatorName.equals("exp") ) {            val = Math.exp(operandValue);	}        else if ( operatorName.equals("floor") ) {            val = Math.floor(operandValue);	}        else if ( operatorName.equals("log") ) {            val = Math.log(operandValue);	}        else if ( operatorName.equals("ln") ) {            val = Math.log(operandValue);	}        else if ( operatorName.equals("log10") ) {            val = Math.log10(operandValue);	}        else if ( operatorName.equals("sqrt") ) {            val = Math.sqrt(operandValue);	}        else if ( operatorName.equals("-") ) {            val = -operandValue;	}	else {            throw new AlgebraicExpressionException("Unknown unary operator or function \"" + operatorName + "\"");	}        return val;    }    public String toString()    {        String msg;        msg = operatorName + "(";        msg += operand.toString();        msg += ")";        return msg;    }}//===========================================================================//= EOF                                                                     =//===========================================================================