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## net.sf.saxon.expr.number
Class Alphanumeric

    java.lang.Object
      net.sf.saxon.expr.number.Alphanumeric

    public class Alphanumeric

extends Object

This class contains static utility methods to test whether a character is alphanumeric, as defined by the rules of xsl:number: that is, whether it is in one of the Unicode categories Nd, Nl, No, Lu, Ll, Lt, Lm or Lo

Method Summary
`static int` | `getDigitFamily(int in)` Determine which digit family a decimal digit belongs to: that is, return the corresponding zero digit.
`static int` | `getDigitValue(int in)` Determine whether a character represents a decimal digit and if so, which digit.
`static boolean` | `isAlphanumeric(int codepoint)` Determine whether a Unicode codepoint is alphanumeric, that is, whether it is in one of the categories Nd, Nl, No, Lu, Ll, Lt, Lm or Lo

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Method Detail

### isAlphanumeric

    public static boolean isAlphanumeric(int codepoint)

  Determine whether a Unicode codepoint is alphanumeric, that is, whether it is in one of the categories Nd, Nl, No, Lu, Ll, Lt, Lm or Lo

  Parameters:
    `codepoint` - the codepoint to be tested
  Returns:
    true if the codepoint is in one of these categories

### getDigitValue

    public static int getDigitValue(int in)

  Determine whether a character represents a decimal digit and if so, which digit.

  Parameters:
    `in` - the Unicode character being tested.
  Returns:
    -1 if it's not a decimal digit, otherwise the digit value.

### getDigitFamily

    public static int getDigitFamily(int in)

  Determine which digit family a decimal digit belongs to: that is, return the corresponding zero digit.

  Parameters:
    `in` - a Unicode character
  Returns:
    if the character is a digit, return the Unicode character that represents zero in the same digit family. Otherwise, return -1.

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Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.