Java Doc for UnitConverter.java in  » Science » jscience-4.3.1 » javax » measure » converter » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Science » jscience 4.3.1 » javax.measure.converter 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   javax.measure.converter.UnitConverter

All known Subclasses:   javax.measure.converter.MultiplyConverter,  javax.measure.converter.LogConverter,  javax.measure.converter.AddConverter,  javax.measure.converter.RationalConverter,
UnitConverter
abstract public class UnitConverter implements Serializable(Code)

This class represents a converter of numeric values.

It is not required for sub-classes to be immutable (e.g. currency converter).

Sub-classes must ensure unicity of the UnitConverter.IDENTITY identity converter. In other words, if the result of an operation is equivalent to the identity converter, then the unique UnitConverter.IDENTITY instance should be returned.


author:
   Jean-Marie Dautelle
version:
   3.1, April 22, 2006


Field Summary
final public static  UnitConverterIDENTITY
     Holds the identity converter (unique).

Constructor Summary
protected  UnitConverter()
     Default constructor.

Method Summary
public  UnitConverterconcatenate(UnitConverter converter)
     Concatenates this converter with another converter.
abstract public  doubleconvert(double x)
     Converts a double value.
Parameters:
  x - the numeric value to convert.
public  booleanequals(Object cvtr)
     Indicates whether this converter is considered the same as the converter specified.
public  inthashCode()
     Returns a hash code value for this converter.
abstract public  UnitConverterinverse()
     Returns the inverse of this converter.
abstract public  booleanisLinear()
     Indicates if this converter is linear.

Field Detail
IDENTITY
final public static UnitConverter IDENTITY(Code)
Holds the identity converter (unique). This converter does nothing (ONE.convert(x) == x).




Constructor Detail
UnitConverter
protected UnitConverter()(Code)
Default constructor.




Method Detail
concatenate
public UnitConverter concatenate(UnitConverter converter)(Code)
Concatenates this converter with another converter. The resulting converter is equivalent to first converting by the specified converter, and then converting by this converter.

Note: Implementations must ensure that the UnitConverter.IDENTITY instance is returned if the resulting converter is an identity converter.


Parameters:
  converter - the other converter. the concatenation of this converter with the other converter.



convert
abstract public double convert(double x) throws ConversionException(Code)
Converts a double value.
Parameters:
  x - the numeric value to convert. the converted numeric value.
throws:
  ConversionException - if an error occurs during conversion.



equals
public boolean equals(Object cvtr)(Code)
Indicates whether this converter is considered the same as the converter specified. To be considered equal this converter concatenated with the one specified must returns the UnitConverter.IDENTITY .
Parameters:
  cvtr - the converter with which to compare. true if the specified object is a converter considered equals to this converter;false otherwise.



hashCode
public int hashCode()(Code)
Returns a hash code value for this converter. Equals object have equal hash codes. this converter hash code value.
See Also:   UnitConverter.equals



inverse
abstract public UnitConverter inverse()(Code)
Returns the inverse of this converter. If x is a valid value, then x == inverse().convert(convert(x)) to within the accuracy of computer arithmetic. the inverse of this converter.



isLinear
abstract public boolean isLinear()(Code)
Indicates if this converter is linear. A converter is linear if convert(u + v) == convert(u) + convert(v) and convert(r * u) == r * convert(u). For linear converters the following property always hold:[code] y1 = c1.convert(x1); y2 = c2.convert(x2); then y1*y2 = c1.concatenate(c2).convert(x1*x2)[/code] true if this converter is linear;false otherwise.



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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