Class RuleBasedTransliterator

    • Method Detail

      • toRules

        @Deprecated
        public java.lang.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
      • 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
        targetSet - TODO
        See Also:
        Transliterator.getTargetSet()
      • safeClone

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