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      1 /*
      2 **********************************************************************
      3 *   Copyright (c) 2002-2007, International Business Machines Corporation
      4 *   and others.  All Rights Reserved.
      5 **********************************************************************
      6 *   Date        Name        Description
      7 *   02/04/2002  aliu        Creation.
      8 **********************************************************************
      9 */
     10 
     11 #ifndef FUNCREPL_H
     12 #define FUNCREPL_H
     13 
     14 #include "unicode/utypes.h"
     15 
     16 #if !UCONFIG_NO_TRANSLITERATION
     17 
     18 #include "unicode/unifunct.h"
     19 #include "unicode/unirepl.h"
     20 
     21 U_NAMESPACE_BEGIN
     22 
     23 class Transliterator;
     24 
     25 /**
     26  * A replacer that calls a transliterator to generate its output text.
     27  * The input text to the transliterator is the output of another
     28  * UnicodeReplacer object.  That is, this replacer wraps another
     29  * replacer with a transliterator.
     30  *
     31  * @author Alan Liu
     32  */
     33 class FunctionReplacer : public UnicodeFunctor, public UnicodeReplacer {
     34 
     35  private:
     36 
     37     /**
     38      * The transliterator.  Must not be null.  OWNED.
     39      */
     40     Transliterator* translit;
     41 
     42     /**
     43      * The replacer object.  This generates text that is then
     44      * processed by 'translit'.  Must not be null.  OWNED.
     45      */
     46     UnicodeFunctor* replacer;
     47 
     48  public:
     49 
     50     /**
     51      * Construct a replacer that takes the output of the given
     52      * replacer, passes it through the given transliterator, and emits
     53      * the result as output.
     54      */
     55     FunctionReplacer(Transliterator* adoptedTranslit,
     56                      UnicodeFunctor* adoptedReplacer);
     57 
     58     /**
     59      * Copy constructor.
     60      */
     61     FunctionReplacer(const FunctionReplacer& other);
     62 
     63     /**
     64      * Destructor
     65      */
     66     virtual ~FunctionReplacer();
     67 
     68     /**
     69      * Implement UnicodeFunctor
     70      */
     71     virtual UnicodeFunctor* clone() const;
     72 
     73     /**
     74      * UnicodeFunctor API.  Cast 'this' to a UnicodeReplacer* pointer
     75      * and return the pointer.
     76      */
     77     virtual UnicodeReplacer* toReplacer() const;
     78 
     79     /**
     80      * UnicodeReplacer API
     81      */
     82     virtual int32_t replace(Replaceable& text,
     83                             int32_t start,
     84                             int32_t limit,
     85                             int32_t& cursor);
     86 
     87     /**
     88      * UnicodeReplacer API
     89      */
     90     virtual UnicodeString& toReplacerPattern(UnicodeString& rule,
     91                                              UBool escapeUnprintable) const;
     92 
     93     /**
     94      * Implement UnicodeReplacer
     95      */
     96     virtual void addReplacementSetTo(UnicodeSet& toUnionTo) const;
     97 
     98     /**
     99      * UnicodeFunctor API
    100      */
    101     virtual void setData(const TransliterationRuleData*);
    102 
    103     /**
    104      * ICU "poor man's RTTI", returns a UClassID for the actual class.
    105      *
    106      * @draft ICU 2.2
    107      */
    108     virtual UClassID getDynamicClassID() const;
    109 
    110     /**
    111      * ICU "poor man's RTTI", returns a UClassID for this class.
    112      *
    113      * @draft ICU 2.2
    114      */
    115     static UClassID U_EXPORT2 getStaticClassID();
    116 };
    117 
    118 U_NAMESPACE_END
    119 
    120 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
    121 #endif
    122 
    123 //eof
    124