net.sf.saxon.expr.sort

Class UcaCollatorUsingJava

java.lang.Object

net.sf.saxon.expr.sort.UcaCollatorUsingJava

All Implemented Interfaces:

StringCollator, SubstringMatcher

public class UcaCollatorUsingJava
extends Object
implements SubstringMatcher

This class implements (an approximation to) the UCA Collation Algorithm relying solely on the built-in Java support (that is, without using the ICU library). This provides a fallback implementation for Saxon-HE, and it is used only when the collation URI does not include the option fallback=no.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	UcaCollatorUsingJava.Identical
class	UcaCollatorUsingJava.Primary
class	UcaCollatorUsingJava.Secondary
static interface	UcaCollatorUsingJava.Strength
class	UcaCollatorUsingJava.Tertiary

Constructor Summary

Constructors

Constructor and Description
UcaCollatorUsingJava(String uri)

Method Summary

Modifier and Type	Method and Description
int	compare(String source, String target)
boolean	comparesEqual(CharSequence s1, CharSequence s2) Compare two strings for equality.
int	compareStrings(CharSequence o1, CharSequence o2) Compare two strings
boolean	contains(String s1, String s2) Test whether one string contains another, according to the rules of the XPath contains() function
boolean	endsWith(String s1, String s2) Test whether one string ends with another, according to the rules of the XPath ends-with() function
AtomicMatchKey	getCollationKey(CharSequence s) Get a collation key for a String.
String	getCollationURI() Get the collation URI.
CollationKey	getJavaCollationKey(String source)
RuleBasedCollator	getRuleBasedCollator()
int	getStrength()
int	hashCode()
void	setProps(Properties props) Set the properties for the UCA collation
void	setStrength(int newStrength)
boolean	startsWith(String s1, String s2) Test whether one string starts with another, according to the rules of the XPath starts-with() function
String	substringAfter(String s1, String s2) Return the part of a string after a given substring, according to the rules of the XPath substring-after() function
String	substringBefore(String s1, String s2) Return the part of a string before a given substring, according to the rules of the XPath substring-before() function

Methods inherited from class java.lang.Object

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

Constructor Detail

UcaCollatorUsingJava

public UcaCollatorUsingJava(String uri)
                     throws XPathException

Throws:

XPathException

Method Detail

getRuleBasedCollator

public RuleBasedCollator getRuleBasedCollator()

compare

public int compare(String source,
                   String target)

getJavaCollationKey

public CollationKey getJavaCollationKey(String source)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

setProps

public void setProps(Properties props)
              throws XPathException

Set the properties for the UCA collation

Parameters:

props - the set of properties parsed from the UCA parameters

Throws:

XPathException

setStrength

public void setStrength(int newStrength)

getStrength

public int getStrength()

comparesEqual

public boolean comparesEqual(CharSequence s1,
                             CharSequence s2)

Description copied from interface: StringCollator

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 interface StringCollator

Parameters:

s1 - the first string

s2 - the second string

Returns:

true if and only if the strings are considered equal,

getCollationURI

public String getCollationURI()

Description copied from interface: StringCollator

Get the collation URI. It must be possible to use this collation URI to reconstitute the collation

Specified by:

getCollationURI in interface StringCollator

Returns:

a collation URI that can be used to reconstruct the collation when an XSLT package is reloaded.

compareStrings

public int compareStrings(CharSequence o1,
                          CharSequence o2)

Description copied from interface: StringCollator

Compare two strings

Specified by:

compareStrings in interface StringCollator

Parameters:

o1 - the first string

o2 - the second string

Returns:

0 if the strings are considered equal, a negative integer if the first string is less than the second, a positive integer if the first string is greater than the second

getCollationKey

public AtomicMatchKey getCollationKey(CharSequence s)

Description copied from interface: StringCollator

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 interface StringCollator

Parameters:

s - the string whose collation key is required

Returns:

the collation key

contains

public boolean contains(String s1,
                        String s2)

Test whether one string contains another, according to the rules of the XPath contains() function

Specified by:

contains in interface SubstringMatcher

Parameters:

s1 - the containing string

s2 - the contained string

Returns:

true iff s1 contains s2

endsWith

public boolean endsWith(String s1,
                        String s2)

Test whether one string ends with another, according to the rules of the XPath ends-with() function

Specified by:

endsWith in interface SubstringMatcher

Parameters:

s1 - the containing string

s2 - the contained string

Returns:

true iff s1 ends with s2

startsWith

public boolean startsWith(String s1,
                          String s2)

Test whether one string starts with another, according to the rules of the XPath starts-with() function

Specified by:

startsWith in interface SubstringMatcher

Parameters:

s1 - the containing string

s2 - the contained string

Returns:

true iff s1 starts with s2

substringAfter

public String substringAfter(String s1,
                             String s2)

Return the part of a string after a given substring, according to the rules of the XPath substring-after() function

Specified by:

substringAfter in interface SubstringMatcher

Parameters:

s1 - the containing string

s2 - the contained string

Returns:

the part of s1 that follows the first occurrence of s2

substringBefore

public String substringBefore(String s1,
                              String s2)

Return the part of a string before a given substring, according to the rules of the XPath substring-before() function

Specified by:

substringBefore in interface SubstringMatcher

Parameters:

s1 - the containing string

s2 - the contained string

Returns:

the part of s1 that precedes the first occurrence of s2