Package net.sf.saxon.expr.sort
Class AlphanumericCollator
java.lang.Object
net.sf.saxon.expr.sort.AlphanumericCollator
- All Implemented Interfaces:
StringCollator
A Comparer that treats strings as an alternating sequence of alpha parts and numeric parts. The
alpha parts are compared using a base collation supplied as a parameter; the numeric parts are
compared numerically. "Numeric" here means a sequence of consecutive ASCII digits 0-9.
Note: this StringCollator produces an ordering that is not compatible with equals().
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionboolean
comparesEqual
(UnicodeString s1, UnicodeString s2) Compare two strings for equality.int
compareStrings
(UnicodeString cs1, UnicodeString cs2) Compare two objects.Get a collation key for a String.Get the collation URI.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface net.sf.saxon.lib.StringCollator
isEqualToEmpty
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Field Details
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Constructor Details
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Method Details
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getCollationURI
Get the collation URI. It must be possible to use this collation URI to reconstitute the collation- Specified by:
getCollationURI
in interfaceStringCollator
- Returns:
- a collation URI that can be used to reconstruct the collation when an XSLT package is reloaded.
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compareStrings
Compare two objects.- Specified by:
compareStrings
in interfaceStringCollator
- Parameters:
cs1
- the first stringcs2
- the second string- Returns:
- <0 if a<b, 0 if a=b, >0 if a>b
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comparesEqual
Compare two strings for equality. This may be more efficient than using compareStrings and testing whether the result is zero, but it must give the same result- Specified by:
comparesEqual
in interfaceStringCollator
- Parameters:
s1
- the first strings2
- the second string- Returns:
- true if and only if the strings are considered equal,
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getCollationKey
Get a collation key for a String. The essential property of collation keys is that if (and only if) two strings are equal under the collation, then comparing the collation keys using the equals() method must return true.- Specified by:
getCollationKey
in interfaceStringCollator
- Parameters:
cs
- the string whose collation key is required- Returns:
- the collation key
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