lt.monarch.math
Class FormulaUtil

java.lang.Object
  lt.monarch.math.FormulaUtil

public class FormulaUtil
extends java.lang.Object

Field Summary

Modifier and Type	Field and Description
protected static java.lang.String	logDelimiters String of possible logical delimiters
protected static java.lang.String[]	logOperation Array of possible logical operations
protected static java.lang.String	operators Possible operators

Method Summary

Modifier and Type	Method and Description
static int	compareOperators(java.lang.String op1, java.lang.String op2) Compares the operators.
static boolean	isBoolean(java.lang.String string) Checks if the string is boolean value
static boolean	isConstant(java.lang.String string) Checks if the string is the constant.
static boolean	isDouble(java.lang.String string) Checks if the string is double number.
static boolean	isExpression(java.lang.String string) Checks if the string is numerical formula (not logical)
static boolean	isFunction(java.lang.String string) Checks if the string is the function.
static boolean	isInteger(java.lang.String string) Checks if the string is integer number.
static boolean	isLeftBracket(java.lang.String string) Checks if the string is the left bracket.
static boolean	isLogOperator(java.lang.String operation) Checks if the string is a logical operation
static boolean	isOperator(java.lang.String string) Checks if the string is the operator.
static boolean	isRightBracket(java.lang.String string) Checks if the string is the right bracket.
static boolean	isVariable(java.lang.String string) Checks if the string is the variable.

Methods inherited from class java.lang.Object

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

Field Detail

operators

protected static final java.lang.String operators

Possible operators

See Also:

Constant Field Values

logOperation

protected static final java.lang.String[] logOperation

Array of possible logical operations

logDelimiters

protected static final java.lang.String logDelimiters

String of possible logical delimiters

See Also:

Constant Field Values

Method Detail

isVariable

public static boolean isVariable(java.lang.String string)

Checks if the string is the variable. Variable must start with "variables_prefix" and end with any amount of number (e.g. "x12345")

Parameters:

string - the supplied string that contains one variables_prefix and several (or none) number symbols.

Returns:

True if the string is variable.

compareOperators

public static int compareOperators(java.lang.String op1,
                                   java.lang.String op2)
                            throws java.lang.Exception

Compares the operators. If less equal then false, if greater then true

Parameters:

op1 - First operation

op2 - Second operation

Returns:

Returns positive if first operand is higher priority than the second one. Negative otherwise. Zero if equal.

Throws:

java.lang.Exception - if wrong delimiter has been found

isLeftBracket

public static boolean isLeftBracket(java.lang.String string)

Checks if the string is the left bracket.

Parameters:

string - The supplied string that contains one symbol.

Returns:

True is the string is left bracket.

isRightBracket

public static boolean isRightBracket(java.lang.String string)

Checks if the string is the right bracket.

Parameters:

string - The supplied string that contains one symbol.

Returns:

True is the string is right bracket.

isConstant

public static boolean isConstant(java.lang.String string)

Checks if the string is the constant.

Parameters:

string - The string which contains one symbol.

Returns:

True if the string is a constant.

isFunction

public static boolean isFunction(java.lang.String string)

Checks if the string is the function.

Parameters:

string - The string which contains one symbol

Returns:

True if the string is a function

isDouble

public static boolean isDouble(java.lang.String string)

Checks if the string is double number.

Parameters:

string - The string which contains one or more symbols

Returns:

True if the string is a double number

isInteger

public static boolean isInteger(java.lang.String string)

Checks if the string is integer number.

Parameters:

string - The string which contains one or more symbols

Returns:

True if the string is an integer number

isOperator

public static boolean isOperator(java.lang.String string)

Checks if the string is the operator.

Parameters:

string - The string which contains one or more symbols

Returns:

True if the string is an operator

isLogOperator

public static boolean isLogOperator(java.lang.String operation)

Checks if the string is a logical operation

Parameters:

operation - The string which contains one or more symbols

Returns:

true if it is logical operation

isExpression

public static boolean isExpression(java.lang.String string)

Checks if the string is numerical formula (not logical)

Parameters:

string - string to check

Returns:

true if it has numeric value

isBoolean

public static boolean isBoolean(java.lang.String string)

Checks if the string is boolean value

Parameters:

string - string to check for boolean value

Returns:

true if string is boolean value