Class RuleBasedSubstringMatcher

java.lang.Object
net.sf.saxon.expr.sort.SimpleCollation
net.sf.saxon.expr.sort.RuleBasedSubstringMatcher
All Implemented Interfaces:
StringCollator, SubstringMatcher

public class RuleBasedSubstringMatcher extends SimpleCollation implements SubstringMatcher
This class wraps a RuleBasedCollator to provide a SubstringMatcher. This users the facilities offered by the RuleBasedCollator to implement the XPath functions contains(), starts-with(), ends-with(), substring-before(), and substring-after().
  • Constructor Details

    • RuleBasedSubstringMatcher

      public RuleBasedSubstringMatcher(String uri, RuleBasedCollator collator)
      Create a RuleBasedSubstringMatcher
      Parameters:
      uri - the collation URI
      collator - the collation to be used
  • Method Details

    • contains

      public boolean contains(UnicodeString s1, UnicodeString 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(UnicodeString s1, UnicodeString 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(UnicodeString s1, UnicodeString 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 UnicodeString substringAfter(UnicodeString s1, UnicodeString 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 UnicodeString substringBefore(UnicodeString s1, UnicodeString 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
    • getCollationKey

      public AtomicMatchKey getCollationKey(UnicodeString s)
      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
      Overrides:
      getCollationKey in class SimpleCollation
      Parameters:
      s - the string whose collation key is required
      Returns:
      the collation key
    • main

      public static void main(String[] args) throws Exception
      Test program to output the sequence of collation element iterators for a given input string
      Parameters:
      args - command line arguments (collationURI, test-string)
      Throws:
      Exception - if any error occurs