Class RuleBasedTransliterator

java.lang.Object
com.ibm.icu.text.Transliterator
com.ibm.icu.text.RuleBasedTransliterator
All Implemented Interfaces:
StringTransform, Transform<String,String>
@Deprecated public class RuleBasedTransliterator extends Transliterator
Deprecated.
This API is ICU internal only.
RuleBasedTransliterator is a transliterator built from a set of rules as defined for Transliterator.createFromRules(String, String, int). See the class Transliterator documentation for the rule syntax.
Author:
Alan Liu
Status:
Internal. This API is ICU internal only.

  • Method Details

    • handleTransliterate

      @Deprecated protected void handleTransliterate(Replaceable text, Transliterator.Position index, boolean incremental)
      Deprecated.
      This API is ICU internal only.
      Implements Transliterator.handleTransliterate(Replaceable, Transliterator.Position, boolean).
      Specified by:
      handleTransliterate in class Transliterator
      Parameters:
      text - the buffer holding transliterated and untransliterated text
      index - the indices indicating the start, limit, context start, and context limit of the text.
      incremental - if true, assume more text may be inserted at pos.limit and act accordingly. Otherwise, transliterate all text between pos.start and pos.limit and move pos.start up to pos.limit.
      See Also:
      Status:
      Internal. This API is ICU internal only.

    • toRules

      @Deprecated public String toRules(boolean escapeUnprintable)
      Deprecated.
      This API is ICU internal only.
      Return a representation of this transliterator as source rules. These rules will produce an equivalent transliterator if used to construct a new transliterator.
      Overrides:
      toRules in class Transliterator
      Parameters:
      escapeUnprintable - if true then convert unprintable character to their hex escape representations, \\uxxxx or \\Uxxxxxxxx. Unprintable characters are those other than U+000A, U+0020..U+007E.
      Returns:
      rules string
      Status:
      Internal. This API is ICU internal only.

    • addSourceTargetSet

      @Deprecated public void addSourceTargetSet(UnicodeSet filter, UnicodeSet sourceSet, UnicodeSet targetSet)
      Deprecated.
      This API is ICU internal only.
      Description copied from class: Transliterator
      Returns the set of all characters that may be generated as replacement text by this transliterator, filtered by BOTH the input filter, and the current getFilter().

      SHOULD BE OVERRIDDEN BY SUBCLASSES. It is probably an error for any transliterator to NOT override this, but we can't force them to for backwards compatibility.

      Other methods vector through this.

      When gathering the information on source and target, the compound transliterator makes things complicated. For example, suppose we have: 

      Global FILTER = [ax]
a > b;
:: NULL;
b > c;
x > d;
      While the filter just allows a and x, b is an intermediate result, which could produce c. So the source and target sets cannot be gathered independently. What we have to do is filter the sources for the first transliterator according to the global filter, intersect that transliterator's filter. Based on that we get the target. The next transliterator gets as a global filter (global + last target). And so on.

      There is another complication: 

      Global FILTER = [ax]
a >|b;
b >c;
      Even though b would be filtered from the input, whenever we have a backup, it could be part of the input. So ideally we will change the global filter as we go.
      Overrides:
      addSourceTargetSet in class Transliterator
      Parameters:
      targetSet - TODO
      See Also:
      Status:
      Internal. This API is ICU internal only.

    • safeClone

      @Deprecated public Transliterator safeClone()
      Deprecated.
      This API is ICU internal only.
      Temporary hack for registry problem. Needs to be replaced by better architecture.
      Status:
      Internal. This API is ICU internal only.