下面列出了java.lang.Character#toChars ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Get the next collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the next character in the
* string".</p>
* <p>This function returns the collation element that the iterator is currently
* pointing to and then updates the internal pointer to point to the next element.
* previous() updates the pointer first and then returns the element. This
* means that when you change direction while iterating (i.e., call next() and
* then call previous(), or call previous() and then call next()), you'll get
* back the same element twice.</p>
*
* @return the next collation element
*/
public int next()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
// if buffer contains any decomposed char values
// return their strength orders before continuing in
// the Normalizer's CharacterIterator.
if (buffer != null) {
if (expIndex < buffer.length) {
return strengthOrder(buffer[expIndex++]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.next();
// are we at the end of Normalizer's text?
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = ch;
return UNMAPPEDCHARVALUE;
}
else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = nextContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = 0;
value = buffer[expIndex++];
}
if (ordering.isSEAsianSwapping()) {
int consonant;
if (isThaiPreVowel(ch)) {
consonant = text.next();
if (isThaiBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
if (isLaoPreVowel(ch)) {
consonant = text.next();
if (isLaoBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the next collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the next character in the
* string".</p>
* <p>This function returns the collation element that the iterator is currently
* pointing to and then updates the internal pointer to point to the next element.
* previous() updates the pointer first and then returns the element. This
* means that when you change direction while iterating (i.e., call next() and
* then call previous(), or call previous() and then call next()), you'll get
* back the same element twice.</p>
*
* @return the next collation element
*/
public int next()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
// if buffer contains any decomposed char values
// return their strength orders before continuing in
// the Normalizer's CharacterIterator.
if (buffer != null) {
if (expIndex < buffer.length) {
return strengthOrder(buffer[expIndex++]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.next();
// are we at the end of Normalizer's text?
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = ch;
return UNMAPPEDCHARVALUE;
}
else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = nextContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = 0;
value = buffer[expIndex++];
}
if (ordering.isSEAsianSwapping()) {
int consonant;
if (isThaiPreVowel(ch)) {
consonant = text.next();
if (isThaiBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
if (isLaoPreVowel(ch)) {
consonant = text.next();
if (isLaoBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the next collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the next character in the
* string".</p>
* <p>This function returns the collation element that the iterator is currently
* pointing to and then updates the internal pointer to point to the next element.
* previous() updates the pointer first and then returns the element. This
* means that when you change direction while iterating (i.e., call next() and
* then call previous(), or call previous() and then call next()), you'll get
* back the same element twice.</p>
*
* @return the next collation element
*/
public int next()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
// if buffer contains any decomposed char values
// return their strength orders before continuing in
// the Normalizer's CharacterIterator.
if (buffer != null) {
if (expIndex < buffer.length) {
return strengthOrder(buffer[expIndex++]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.next();
// are we at the end of Normalizer's text?
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = ch;
return UNMAPPEDCHARVALUE;
}
else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = nextContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = 0;
value = buffer[expIndex++];
}
if (ordering.isSEAsianSwapping()) {
int consonant;
if (isThaiPreVowel(ch)) {
consonant = text.next();
if (isThaiBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
if (isLaoPreVowel(ch)) {
consonant = text.next();
if (isLaoBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the next collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the next character in the
* string".</p>
* <p>This function returns the collation element that the iterator is currently
* pointing to and then updates the internal pointer to point to the next element.
* previous() updates the pointer first and then returns the element. This
* means that when you change direction while iterating (i.e., call next() and
* then call previous(), or call previous() and then call next()), you'll get
* back the same element twice.</p>
*
* @return the next collation element
*/
public int next()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
// if buffer contains any decomposed char values
// return their strength orders before continuing in
// the Normalizer's CharacterIterator.
if (buffer != null) {
if (expIndex < buffer.length) {
return strengthOrder(buffer[expIndex++]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.next();
// are we at the end of Normalizer's text?
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = ch;
return UNMAPPEDCHARVALUE;
}
else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = nextContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = 0;
value = buffer[expIndex++];
}
if (ordering.isSEAsianSwapping()) {
int consonant;
if (isThaiPreVowel(ch)) {
consonant = text.next();
if (isThaiBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
if (isLaoPreVowel(ch)) {
consonant = text.next();
if (isLaoBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the next collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the next character in the
* string".</p>
* <p>This function returns the collation element that the iterator is currently
* pointing to and then updates the internal pointer to point to the next element.
* previous() updates the pointer first and then returns the element. This
* means that when you change direction while iterating (i.e., call next() and
* then call previous(), or call previous() and then call next()), you'll get
* back the same element twice.</p>
*
* @return the next collation element
*/
public int next()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
// if buffer contains any decomposed char values
// return their strength orders before continuing in
// the Normalizer's CharacterIterator.
if (buffer != null) {
if (expIndex < buffer.length) {
return strengthOrder(buffer[expIndex++]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.next();
// are we at the end of Normalizer's text?
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = ch;
return UNMAPPEDCHARVALUE;
}
else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = nextContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = 0;
value = buffer[expIndex++];
}
if (ordering.isSEAsianSwapping()) {
int consonant;
if (isThaiPreVowel(ch)) {
consonant = text.next();
if (isThaiBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
if (isLaoPreVowel(ch)) {
consonant = text.next();
if (isLaoBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the next collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the next character in the
* string".</p>
* <p>This function returns the collation element that the iterator is currently
* pointing to and then updates the internal pointer to point to the next element.
* previous() updates the pointer first and then returns the element. This
* means that when you change direction while iterating (i.e., call next() and
* then call previous(), or call previous() and then call next()), you'll get
* back the same element twice.</p>
*
* @return the next collation element
*/
public int next()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
// if buffer contains any decomposed char values
// return their strength orders before continuing in
// the Normalizer's CharacterIterator.
if (buffer != null) {
if (expIndex < buffer.length) {
return strengthOrder(buffer[expIndex++]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.next();
// are we at the end of Normalizer's text?
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = ch;
return UNMAPPEDCHARVALUE;
}
else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = nextContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = 0;
value = buffer[expIndex++];
}
if (ordering.isSEAsianSwapping()) {
int consonant;
if (isThaiPreVowel(ch)) {
consonant = text.next();
if (isThaiBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
if (isLaoPreVowel(ch)) {
consonant = text.next();
if (isLaoBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
}
return strengthOrder(value);
}
/**
* Get the next collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the next character in the
* string".</p>
* <p>This function returns the collation element that the iterator is currently
* pointing to and then updates the internal pointer to point to the next element.
* previous() updates the pointer first and then returns the element. This
* means that when you change direction while iterating (i.e., call next() and
* then call previous(), or call previous() and then call next()), you'll get
* back the same element twice.</p>
*
* @return the next collation element
*/
public int next()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
// if buffer contains any decomposed char values
// return their strength orders before continuing in
// the Normalizer's CharacterIterator.
if (buffer != null) {
if (expIndex < buffer.length) {
return strengthOrder(buffer[expIndex++]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.next();
// are we at the end of Normalizer's text?
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = ch;
return UNMAPPEDCHARVALUE;
}
else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = nextContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = 0;
value = buffer[expIndex++];
}
if (ordering.isSEAsianSwapping()) {
int consonant;
if (isThaiPreVowel(ch)) {
consonant = text.next();
if (isThaiBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
if (isLaoPreVowel(ch)) {
consonant = text.next();
if (isLaoBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
}
return strengthOrder(value);
}
/**
* Get the next collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the next character in the
* string".</p>
* <p>This function returns the collation element that the iterator is currently
* pointing to and then updates the internal pointer to point to the next element.
* previous() updates the pointer first and then returns the element. This
* means that when you change direction while iterating (i.e., call next() and
* then call previous(), or call previous() and then call next()), you'll get
* back the same element twice.</p>
*/
public int next()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
// if buffer contains any decomposed char values
// return their strength orders before continuing in
// the Normalizer's CharacterIterator.
if (buffer != null) {
if (expIndex < buffer.length) {
return strengthOrder(buffer[expIndex++]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.next();
// are we at the end of Normalizer's text?
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = ch;
return UNMAPPEDCHARVALUE;
}
else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = nextContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = 0;
value = buffer[expIndex++];
}
if (ordering.isSEAsianSwapping()) {
int consonant;
if (isThaiPreVowel(ch)) {
consonant = text.next();
if (isThaiBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
if (isLaoPreVowel(ch)) {
consonant = text.next();
if (isLaoBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}
/**
* Get the next collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the next character in the
* string".</p>
* <p>This function returns the collation element that the iterator is currently
* pointing to and then updates the internal pointer to point to the next element.
* previous() updates the pointer first and then returns the element. This
* means that when you change direction while iterating (i.e., call next() and
* then call previous(), or call previous() and then call next()), you'll get
* back the same element twice.</p>
*
* @return the next collation element
*/
public int next()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
// if buffer contains any decomposed char values
// return their strength orders before continuing in
// the Normalizer's CharacterIterator.
if (buffer != null) {
if (expIndex < buffer.length) {
return strengthOrder(buffer[expIndex++]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.next();
// are we at the end of Normalizer's text?
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = ch;
return UNMAPPEDCHARVALUE;
}
else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = nextContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = 0;
value = buffer[expIndex++];
}
if (ordering.isSEAsianSwapping()) {
int consonant;
if (isThaiPreVowel(ch)) {
consonant = text.next();
if (isThaiBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
if (isLaoPreVowel(ch)) {
consonant = text.next();
if (isLaoBaseConsonant(consonant)) {
buffer = makeReorderedBuffer(consonant, value, buffer, true);
value = buffer[0];
expIndex = 1;
} else if (consonant != NormalizerBase.DONE) {
text.previous();
}
}
}
return strengthOrder(value);
}
/**
* Get the previous collation element in the string. <p>This iterator iterates
* over a sequence of collation elements that were built from the string.
* Because there isn't necessarily a one-to-one mapping from characters to
* collation elements, this doesn't mean the same thing as "return the
* collation element [or ordering priority] of the previous character in the
* string".</p>
* <p>This function updates the iterator's internal pointer to point to the
* collation element preceding the one it's currently pointing to and then
* returns that element, while next() returns the current element and then
* updates the pointer. This means that when you change direction while
* iterating (i.e., call next() and then call previous(), or call previous()
* and then call next()), you'll get back the same element twice.</p>
*
* @return the previous collation element
* @since 1.2
*/
public int previous()
{
if (text == null) {
return NULLORDER;
}
NormalizerBase.Mode textMode = text.getMode();
// convert the owner's mode to something the Normalizer understands
NormalizerBase.Mode ownerMode =
CollatorUtilities.toNormalizerMode(owner.getDecomposition());
if (textMode != ownerMode) {
text.setMode(ownerMode);
}
if (buffer != null) {
if (expIndex > 0) {
return strengthOrder(buffer[--expIndex]);
} else {
buffer = null;
expIndex = 0;
}
} else if (swapOrder != 0) {
if (Character.isSupplementaryCodePoint(swapOrder)) {
char[] chars = Character.toChars(swapOrder);
swapOrder = chars[1];
return chars[0] << 16;
}
int order = swapOrder << 16;
swapOrder = 0;
return order;
}
int ch = text.previous();
if (ch == NormalizerBase.DONE) {
return NULLORDER;
}
int value = ordering.getUnicodeOrder(ch);
if (value == RuleBasedCollator.UNMAPPED) {
swapOrder = UNMAPPEDCHARVALUE;
return ch;
} else if (value >= RuleBasedCollator.CONTRACTCHARINDEX) {
value = prevContractChar(ch);
}
if (value >= RuleBasedCollator.EXPANDCHARINDEX) {
buffer = ordering.getExpandValueList(value);
expIndex = buffer.length;
value = buffer[--expIndex];
}
if (ordering.isSEAsianSwapping()) {
int vowel;
if (isThaiBaseConsonant(ch)) {
vowel = text.previous();
if (isThaiPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
if (isLaoBaseConsonant(ch)) {
vowel = text.previous();
if (isLaoPreVowel(vowel)) {
buffer = makeReorderedBuffer(vowel, value, buffer, false);
expIndex = buffer.length - 1;
value = buffer[expIndex];
} else {
text.next();
}
}
}
return strengthOrder(value);
}