Package net.sf.saxon.expr.sort
Class AlphanumericCollator
- java.lang.Object
-
- net.sf.saxon.expr.sort.AlphanumericCollator
-
- All Implemented Interfaces:
java.io.Serializable
,StringCollator
public class AlphanumericCollator extends java.lang.Object implements StringCollator, java.io.Serializable
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().
- See Also:
- Serialized Form
-
-
Constructor Summary
Constructors Constructor Description AlphanumericCollator(StringCollator base)
Create an alphanumeric collation
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
comparesEqual(java.lang.String s1, java.lang.String s2)
Compare two strings for equality.int
compareStrings(java.lang.String s1, java.lang.String s2)
Compare two objects.java.lang.Object
getCollationKey(java.lang.String s)
Get a collation key for two Strings.
-
-
-
Constructor Detail
-
AlphanumericCollator
public AlphanumericCollator(StringCollator base)
Create an alphanumeric collation- Parameters:
base
- the collation used to compare the alphabetic parts of the string
-
-
Method Detail
-
compareStrings
public int compareStrings(java.lang.String s1, java.lang.String s2)
Compare two objects.- Specified by:
compareStrings
in interfaceStringCollator
- Parameters:
s1
- the first strings2
- the second string- Returns:
- <0 if a0 if a>b
-
comparesEqual
public boolean comparesEqual(java.lang.String s1, java.lang.String s2)
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,
-
getCollationKey
public java.lang.Object getCollationKey(java.lang.String s)
Get a collation key for two Strings. The essential property of collation keys is that if two values are equal under the collation, then the collation keys are compare correctly under the equals() method.- Specified by:
getCollationKey
in interfaceStringCollator
- Parameters:
s
- the string whose collation key is required- Returns:
- the collation key
-
-