tec.uom.se.format

Class EBNFHelper

java.lang.Object

tec.uom.se.format.EBNFHelper

class EBNFHelper
extends java.lang.Object

Helper class that handles internals of formatting in EBNFUnitFormat

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static int	ADDITION_PRECEDENCE Operator precedence for the addition and subtraction operations
private static char	EXPONENT_1 Exponent 1 character
private static char	EXPONENT_2 Exponent 2 character
(package private) static int	EXPONENT_PRECEDENCE Operator precedence for the exponentiation and logarithm operations
(package private) static char	MIDDLE_DOT
(package private) static int	NOOP_PRECEDENCE Operator precedence for a unit identifier containing no mathematical operations (i.e., consisting exclusively of an identifier and possibly a prefix).
(package private) static int	PRODUCT_PRECEDENCE Operator precedence for the multiplication and division operations

Constructor Summary

Constructors

Constructor and Description
EBNFHelper()

Method Summary

Modifier and Type	Method and Description
private static void	formatExponent(javax.measure.Unit<?> unit, int pow, int root, boolean continued, java.lang.Appendable buffer, SymbolMap symbolMap) Format the given unit raised to the given fractional power to the given StringBuffer.
(package private) static int	formatInternal(javax.measure.Unit<?> unit, java.lang.Appendable buffer, SymbolMap symbolMap) Format the given unit to the given StringBuffer, then return the operator precedence of the outermost operator in the unit expression that was formatted.
private static int	newUnitPrecedenceInternal(javax.measure.Unit<?> unit, java.lang.Appendable buffer, SymbolMap symbolMap)
private static int	noopPrecedenceInternal(java.lang.Appendable buffer, java.lang.String symbol)
private static int	productPrecedenceInternal(javax.measure.Unit<?> unit, java.lang.Appendable buffer, SymbolMap symbolMap)

Methods inherited from class java.lang.Object

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

Field Detail

ADDITION_PRECEDENCE

static final int ADDITION_PRECEDENCE

Operator precedence for the addition and subtraction operations

See Also:

Constant Field Values

PRODUCT_PRECEDENCE

static final int PRODUCT_PRECEDENCE

Operator precedence for the multiplication and division operations

See Also:

Constant Field Values

EXPONENT_PRECEDENCE

static final int EXPONENT_PRECEDENCE

Operator precedence for the exponentiation and logarithm operations

See Also:

Constant Field Values

MIDDLE_DOT

static final char MIDDLE_DOT

See Also:

Constant Field Values

EXPONENT_1

private static final char EXPONENT_1

Exponent 1 character

See Also:

Constant Field Values

EXPONENT_2

private static final char EXPONENT_2

Exponent 2 character

See Also:

Constant Field Values

NOOP_PRECEDENCE

static final int NOOP_PRECEDENCE

Operator precedence for a unit identifier containing no mathematical operations (i.e., consisting exclusively of an identifier and possibly a prefix). Defined to be Integer.MAX_VALUE so that no operator can have a higher precedence.

See Also:

Constant Field Values

Constructor Detail

EBNFHelper

EBNFHelper()

Method Detail

formatInternal

static int formatInternal(javax.measure.Unit<?> unit,
                          java.lang.Appendable buffer,
                          SymbolMap symbolMap)
                   throws java.io.IOException

Format the given unit to the given StringBuffer, then return the operator precedence of the outermost operator in the unit expression that was formatted. See ConverterFormat for the constants that define the various precedence values.

Parameters:

unit - the unit to be formatted

buffer - the StringBuffer to be written to

Returns:

the operator precedence of the outermost operator in the unit expression that was output

Throws:

java.io.IOException

formatExponent

private static void formatExponent(javax.measure.Unit<?> unit,
                                   int pow,
                                   int root,
                                   boolean continued,
                                   java.lang.Appendable buffer,
                                   SymbolMap symbolMap)
                            throws java.io.IOException

Format the given unit raised to the given fractional power to the given StringBuffer.

Parameters:

unit - Unit the unit to be formatted

pow - int the numerator of the fractional power

root - int the denominator of the fractional power

continued - boolean true if the converter expression should begin with an operator, otherwise false. This will always be true unless the unit being modified is equal to Unit.ONE.

buffer - StringBuffer the buffer to append to. No assumptions should be made about its content.

Throws:

java.io.IOException

noopPrecedenceInternal

private static int noopPrecedenceInternal(java.lang.Appendable buffer,
                                          java.lang.String symbol)
                                   throws java.io.IOException

Throws:

java.io.IOException

productPrecedenceInternal

private static int productPrecedenceInternal(javax.measure.Unit<?> unit,
                                             java.lang.Appendable buffer,
                                             SymbolMap symbolMap)
                                      throws java.io.IOException

Throws:

java.io.IOException

newUnitPrecedenceInternal

private static int newUnitPrecedenceInternal(javax.measure.Unit<?> unit,
                                             java.lang.Appendable buffer,
                                             SymbolMap symbolMap)
                                      throws java.io.IOException

Throws:

java.io.IOException