Package com.twelvemonkeys.util.convert

Class NumberConverter

  • All Implemented Interfaces:
    PropertyConverter
    Direct Known Subclasses:
    DateConverter, TimeConverter
    public class NumberConverter
extends java.lang.Object
implements PropertyConverter
    Converts strings to numbers and back.

    This class has a static cache of NumberFormats, to avoid creation and parsing of number formats every time one is used.

    Version:
    $Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/util/convert/NumberConverter.java#2 $

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private static java.text.NumberFormat sDefaultFormat  
      private static java.util.Map<java.lang.String,​java.text.Format> sFormats  
      private static java.text.DecimalFormatSymbols SYMBOLS  

    • Constructor Summary

      Constructors 
      Constructor Description
      NumberConverter()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected java.text.Format getFormat​(java.lang.Class pFormatterClass, java.lang.Object... pFormat)  
      private java.text.NumberFormat getNumberFormat​(java.lang.String pFormat)  
      java.lang.Object toObject​(java.lang.String pString, java.lang.Class pType, java.lang.String pFormat)
      Converts the string to a number, using the given format for parsing.
      java.lang.String toString​(java.lang.Object pObject, java.lang.String pFormat)
      Converts the object to a string, using the given format

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • SYMBOLS

        private static final java.text.DecimalFormatSymbols SYMBOLS

      • sDefaultFormat

        private static final java.text.NumberFormat sDefaultFormat

      • sFormats

        private static final java.util.Map<java.lang.String,​java.text.Format> sFormats

    • Constructor Detail

      • NumberConverter

        public NumberConverter()

    • Method Detail

      • toObject

        public java.lang.Object toObject​(java.lang.String pString,
                                 java.lang.Class pType,
                                 java.lang.String pFormat)
                          throws ConversionException
        Converts the string to a number, using the given format for parsing.
        Specified by:
        toObject in interface PropertyConverter
        Parameters:
        pString - the string to convert.
        pType - the type to convert to. PropertyConverter implementations may choose to ignore this parameter.
        pFormat - the format used for parsing. PropertyConverter implementations may choose to ignore this parameter. Also, implementations that require a parser format, should provide a default format, and allow null as the format argument.
        Returns:
        the object created from the given string. May safely be typecast to java.lang.Number or the class of the type parameter.
        Throws:
        ConversionException
        See Also:
        Number, NumberFormat

      • toString

        public java.lang.String toString​(java.lang.Object pObject,
                                 java.lang.String pFormat)
                          throws ConversionException
        Converts the object to a string, using the given format
        Specified by:
        toString in interface PropertyConverter
        Parameters:
        pObject - the object to convert.
        pFormat - the format used for parsing. PropertyConverter implementations may choose to ignore this parameter. Also, implementations that require a parser format, should provide a default format, and allow null as the format argument.
        Returns:
        the string representation of the object, on the correct format.
        Throws:
        ConversionException - if the object is not a subclass of Number

      • getNumberFormat

        private java.text.NumberFormat getNumberFormat​(java.lang.String pFormat)

      • getFormat

        protected final java.text.Format getFormat​(java.lang.Class pFormatterClass,
                                           java.lang.Object... pFormat)