ComposedCharIter.java

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packagesun.text;

importjdk.internal.icu.impl.NormalizerImpl;
importjdk.internal.icu.text.NormalizerBase;

publicfinalclassComposedCharIter {
/**
 * Constant that indicates the iteration has completed.
 * {@link #next} returns this value when there are no more composed characters
 * over which to iterate.
 */
publicstaticfinalintDONE = NormalizerBase.DONE;

//cache the decomps mapping, so the seconde composedcharIter does
//not need to get the data again.
privatestaticintchars[];
privatestaticStringdecomps[];
privatestaticintdecompNum;

static {
intmaxNum = 2100;
chars = newint[maxNum];
decomps = newString[maxNum];
decompNum = NormalizerImpl.getDecompose(chars, decomps);
 }

/**
 * Construct a new {@code ComposedCharIter}. The iterator will return
 * all Unicode characters with canonical decompositions, excluding Korean
 * Hangul characters.
 */
publicComposedCharIter() { }

/**
 * Returns the next precomposed Unicode character.
 * Repeated calls to {@code next} return all of the precomposed characters defined
 * by Unicode, in ascending order. After all precomposed characters have
 * been returned, {@link #hasNext} will return {@code false} and further calls
 * to {@code next} will return {@link #DONE}.
 */
publicintnext() {
if (curChar == decompNum - 1) {
returnDONE;
 }
returnchars[++curChar];
 }

/**
 * Returns the Unicode decomposition of the current character.
 * This method returns the decomposition of the precomposed character most
 * recently returned by {@link #next}. The resulting decomposition is
 * affected by the settings of the options passed to the constructor.
 */
publicStringdecomposition() {
returndecomps[curChar];
 }
privateintcurChar = -1;
}