Package net.sf.saxon.expr.sort
Class SimpleCollation
- java.lang.Object
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- net.sf.saxon.expr.sort.SimpleCollation
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- All Implemented Interfaces:
java.io.Serializable
,StringCollator
public class SimpleCollation extends java.lang.Object implements StringCollator
A simple collation that just wraps a suppled Comparator- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description SimpleCollation(java.util.Comparator collation)
Create a SimpleCollation
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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 o1, java.lang.String o2)
Compares its two arguments for order.java.util.Comparator
getCollation()
Get the underlying comparatorjava.lang.Object
getCollationKey(java.lang.String s)
Get a collation key for two Strings.void
setCollation(java.util.Comparator collation)
Set the underlying comparator
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Method Detail
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compareStrings
public int compareStrings(java.lang.String o1, java.lang.String o2)
Compares its two arguments for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.- Specified by:
compareStrings
in interfaceStringCollator
- Parameters:
o1
- the first object to be compared.o2
- the second object to be compared.- Returns:
- a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.
- Throws:
java.lang.ClassCastException
- if the arguments' types prevent them from being compared by this Comparator.
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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,
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getCollation
public java.util.Comparator getCollation()
Get the underlying comparator- Returns:
- the underlying comparator
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setCollation
public void setCollation(java.util.Comparator collation)
Set the underlying comparator- Parameters:
collation
- the underlying comparator
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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
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