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com.landawn.abacus.util.stream.AbstractCharStream Maven / Gradle / Ivy
A general programming library in Java/Android. It's easy to learn and simple to use with concise and powerful APIs.
/*
* Copyright (C) 2016, 2017, 2018, 2019 HaiYang Li
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package com.landawn.abacus.util.stream;
import java.util.Collection;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Random;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import com.landawn.abacus.exception.DuplicatedResultException;
import com.landawn.abacus.util.CharIterator;
import com.landawn.abacus.util.CharList;
import com.landawn.abacus.util.CharSummaryStatistics;
import com.landawn.abacus.util.Fn;
import com.landawn.abacus.util.Fn.Suppliers;
import com.landawn.abacus.util.IndexedChar;
import com.landawn.abacus.util.Joiner;
import com.landawn.abacus.util.MergeResult;
import com.landawn.abacus.util.Multiset;
import com.landawn.abacus.util.MutableChar;
import com.landawn.abacus.util.MutableInt;
import com.landawn.abacus.util.MutableLong;
import com.landawn.abacus.util.N;
import com.landawn.abacus.util.Pair;
import com.landawn.abacus.util.Percentage;
import com.landawn.abacus.util.StringUtil.Strings;
import com.landawn.abacus.util.Throwables;
import com.landawn.abacus.util.Tuple.Tuple3;
import com.landawn.abacus.util.u.Optional;
import com.landawn.abacus.util.u.OptionalChar;
import com.landawn.abacus.util.function.BiConsumer;
import com.landawn.abacus.util.function.BinaryOperator;
import com.landawn.abacus.util.function.CharBiFunction;
import com.landawn.abacus.util.function.CharBiPredicate;
import com.landawn.abacus.util.function.CharBinaryOperator;
import com.landawn.abacus.util.function.CharConsumer;
import com.landawn.abacus.util.function.CharFunction;
import com.landawn.abacus.util.function.CharPredicate;
import com.landawn.abacus.util.function.CharTernaryOperator;
import com.landawn.abacus.util.function.CharTriPredicate;
import com.landawn.abacus.util.function.Function;
import com.landawn.abacus.util.function.ObjCharConsumer;
import com.landawn.abacus.util.function.Supplier;
import com.landawn.abacus.util.function.ToCharFunction;
/**
*
*/
abstract class AbstractCharStream extends CharStream {
AbstractCharStream(final boolean sorted, final Collection closeHandlers) {
super(sorted, closeHandlers);
}
@Override
public CharStream distinct() {
assertNotClosed();
final Set set = N.newHashSet();
return newStream(this.sequential().filter(value -> set.add(value)).iteratorEx(), sorted);
}
// @Override
// public CharStream flattMap(final CharFunction mapper) {
// assertNotClosed();
//
// return flatMap(new CharFunction() {
// @Override
// public CharStream apply(char t) {
// return CharStream.of(mapper.apply(t));
// }
// });
// }
@Override
public CharStream flattMap(final CharFunction mapper) {
assertNotClosed();
return flatMap(t -> CharStream.of(mapper.apply(t)));
}
@Override
public Stream flattMapToObj(final CharFunction> mapper) {
assertNotClosed();
return flatMapToObj(t -> Stream.of(mapper.apply(t)));
}
@Override
public Stream flatMappToObj(final CharFunction mapper) {
assertNotClosed();
return flatMapToObj(t -> Stream.of(mapper.apply(t)));
}
@Override
public CharStream mapPartial(final CharFunction mapper) {
if (isParallel()) {
return mapToObj(mapper).psp(s -> s.filter(Fn.IS_PRESENT_CHAR).mapToChar(Fn.GET_AS_CHAR));
} else {
return mapToObj(mapper).filter(Fn.IS_PRESENT_CHAR).mapToChar(Fn.GET_AS_CHAR);
}
}
@Override
public CharStream rangeMap(final CharBiPredicate sameRange, final CharBinaryOperator mapper) {
assertNotClosed();
final CharIteratorEx iter = iteratorEx();
return newStream(new CharIteratorEx() {
private char left = 0, right = 0, next = 0;
private boolean hasNext = false;
@Override
public boolean hasNext() {
return hasNext || iter.hasNext();
}
@Override
public char nextChar() {
left = hasNext ? next : iter.nextChar();
right = left;
while (hasNext = iter.hasNext()) {
next = iter.nextChar();
if (sameRange.test(left, next)) {
right = next;
} else {
break;
}
}
return mapper.applyAsChar(left, right);
}
}, false);
}
@Override
public Stream rangeMapToObj(final CharBiPredicate sameRange, final CharBiFunction mapper) {
assertNotClosed();
final CharIteratorEx iter = iteratorEx();
return newStream(new ObjIteratorEx() {
private char left = 0, right = 0, next = 0;
private boolean hasNext = false;
@Override
public boolean hasNext() {
return hasNext || iter.hasNext();
}
@Override
public T next() {
left = hasNext ? next : iter.nextChar();
right = left;
while (hasNext = iter.hasNext()) {
next = iter.nextChar();
if (sameRange.test(left, next)) {
right = next;
} else {
break;
}
}
return mapper.apply(left, right);
}
}, false, null);
}
@Override
public Stream collapse(final CharBiPredicate collapsible) {
assertNotClosed();
final CharIteratorEx iter = iteratorEx();
return newStream(new ObjIteratorEx() {
private boolean hasNext = false;
private char next = 0;
@Override
public boolean hasNext() {
return hasNext || iter.hasNext();
}
@Override
public CharList next() {
final CharList result = new CharList(9);
result.add(hasNext ? next : (next = iter.nextChar()));
while ((hasNext = iter.hasNext())) {
if (collapsible.test(next, (next = iter.nextChar()))) {
result.add(next);
} else {
break;
}
}
return result;
}
}, false, null);
}
@Override
public CharStream collapse(final CharBiPredicate collapsible, final CharBinaryOperator mergeFunction) {
assertNotClosed();
final CharIteratorEx iter = iteratorEx();
return newStream(new CharIteratorEx() {
private boolean hasNext = false;
private char next = 0;
@Override
public boolean hasNext() {
return hasNext || iter.hasNext();
}
@Override
public char nextChar() {
char res = hasNext ? next : (next = iter.nextChar());
while ((hasNext = iter.hasNext())) {
if (collapsible.test(next, (next = iter.nextChar()))) {
res = mergeFunction.applyAsChar(res, next);
} else {
break;
}
}
return res;
}
}, false);
}
@Override
public CharStream collapse(final CharTriPredicate collapsible, final CharBinaryOperator mergeFunction) {
assertNotClosed();
final CharIteratorEx iter = iteratorEx();
return newStream(new CharIteratorEx() {
private boolean hasNext = false;
private char next = 0;
@Override
public boolean hasNext() {
return hasNext || iter.hasNext();
}
@Override
public char nextChar() {
final char first = hasNext ? next : (next = iter.nextChar());
char res = first;
while ((hasNext = iter.hasNext())) {
if (collapsible.test(first, next, (next = iter.nextChar()))) {
res = mergeFunction.applyAsChar(res, next);
} else {
break;
}
}
return res;
}
}, false);
}
@Override
public CharStream skip(final long n, final CharConsumer action) {
assertNotClosed();
checkArgNotNegative(n, "n");
checkArgNotNull(action, "action");
final CharPredicate filter = isParallel() ? new CharPredicate() {
final AtomicLong cnt = new AtomicLong(n);
@Override
public boolean test(char value) {
return cnt.getAndDecrement() > 0;
}
} : new CharPredicate() {
final MutableLong cnt = MutableLong.of(n);
@Override
public boolean test(char value) {
return cnt.getAndDecrement() > 0;
}
};
return dropWhile(filter, action);
}
@Override
public CharStream removeIf(final CharPredicate predicate) {
assertNotClosed();
return filter(value -> !predicate.test(value));
}
@Override
public CharStream removeIf(final CharPredicate predicate, final CharConsumer actionOnDroppedItem) {
assertNotClosed();
return filter(value -> {
if (predicate.test(value)) {
actionOnDroppedItem.accept(value);
return false;
}
return true;
});
}
@Override
public CharStream filter(final CharPredicate predicate, final CharConsumer actionOnDroppedItem) {
assertNotClosed();
return filter(value -> {
if (!predicate.test(value)) {
actionOnDroppedItem.accept(value);
return false;
}
return true;
});
}
@Override
public CharStream dropWhile(final CharPredicate predicate, final CharConsumer actionOnDroppedItem) {
assertNotClosed();
return dropWhile(value -> {
if (predicate.test(value)) {
actionOnDroppedItem.accept(value);
return true;
}
return false;
});
}
@Override
public CharStream step(final long step) {
assertNotClosed();
checkArgPositive(step, "step");
if (step == 1) {
return skip(0);
}
final long skip = step - 1;
final CharIteratorEx iter = this.iteratorEx();
final CharIterator charIterator = new CharIteratorEx() {
@Override
public boolean hasNext() {
return iter.hasNext();
}
@Override
public char nextChar() {
final char next = iter.nextChar();
iter.advance(skip);
return next;
}
};
return newStream(charIterator, sorted);
}
@Override
public Stream split(final int chunkSize) {
assertNotClosed();
return splitToList(chunkSize).map(t -> new ArrayCharStream(t.array(), 0, t.size(), sorted, null));
}
@Override
public Stream split(final CharPredicate predicate) {
assertNotClosed();
return splitToList(predicate).map(t -> new ArrayCharStream(t.array(), 0, t.size(), sorted, null));
}
@Override
public Stream splitAt(final CharPredicate where) {
assertNotClosed();
final CharIteratorEx iter = iteratorEx();
return newStream(new ObjIteratorEx() {
private int cursor = 0;
private char next = 0;
private boolean hasNext = false;
@Override
public boolean hasNext() {
return cursor < 2;
}
@Override
public CharStream next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
CharStream result = null;
if (cursor == 0) {
final CharList list = new CharList();
while (iter.hasNext()) {
next = iter.nextChar();
if (!where.test(next)) {
list.add(next);
} else {
hasNext = true;
break;
}
}
result = new ArrayCharStream(list.array(), 0, list.size(), sorted, null);
} else {
CharIteratorEx iterEx = iter;
if (hasNext) {
iterEx = new CharIteratorEx() {
private boolean isFirst = true;
@Override
public boolean hasNext() {
return isFirst || iter.hasNext();
}
@Override
public char nextChar() {
if (!hasNext()) {
throw new NoSuchElementException();
}
if (isFirst) {
isFirst = false;
return next;
} else {
return iter.nextChar();
}
}
};
}
result = new IteratorCharStream(iterEx, sorted, null);
}
cursor++;
return result;
}
@Override
public long count() {
iter.count();
return 2 - cursor;
}
@Override
public void advance(long n) {
if (n == 0) {
return;
} else if (n == 1) {
if (cursor == 0) {
while (iter.hasNext()) {
next = iter.nextChar();
if (!where.test(next)) {
hasNext = true;
break;
}
}
} else {
iter.advance(Long.MAX_VALUE);
}
} else {
iter.advance(Long.MAX_VALUE);
}
cursor = n >= 2 ? 2 : cursor + (int) n;
}
}, false, null);
}
@Override
public Stream sliding(final int windowSize, final int increment) {
assertNotClosed();
return slidingToList(windowSize, increment).map(t -> new ArrayCharStream(t.array(), 0, t.size(), sorted, null));
}
@Override
public CharStream scan(final CharBinaryOperator accumulator) {
assertNotClosed();
final CharIteratorEx iter = iteratorEx();
return newStream(new CharIteratorEx() {
private char res = 0;
private boolean isFirst = true;
@Override
public boolean hasNext() {
return iter.hasNext();
}
@Override
public char nextChar() {
if (isFirst) {
isFirst = false;
return (res = iter.nextChar());
} else {
return (res = accumulator.applyAsChar(res, iter.nextChar()));
}
}
}, false);
}
@Override
public CharStream scan(final char init, final CharBinaryOperator accumulator) {
assertNotClosed();
final CharIteratorEx iter = iteratorEx();
return newStream(new CharIteratorEx() {
private char res = init;
@Override
public boolean hasNext() {
return iter.hasNext();
}
@Override
public char nextChar() {
return (res = accumulator.applyAsChar(res, iter.nextChar()));
}
}, false);
}
@Override
public CharStream scan(final char init, final CharBinaryOperator accumulator, final boolean initIncluded) {
assertNotClosed();
if (!initIncluded) {
return scan(init, accumulator);
}
final CharIteratorEx iter = iteratorEx();
return newStream(new CharIteratorEx() {
private boolean isFirst = true;
private char res = init;
@Override
public boolean hasNext() {
return isFirst || iter.hasNext();
}
@Override
public char nextChar() {
if (isFirst) {
isFirst = false;
return init;
}
return (res = accumulator.applyAsChar(res, iter.nextChar()));
}
}, false);
}
@Override
public CharStream intersection(final Collection c) {
assertNotClosed();
final Multiset multiset = Multiset.from(c);
return newStream(this.sequential().filter(value -> multiset.getAndRemove(value) > 0).iteratorEx(), sorted);
}
@Override
public CharStream difference(final Collection c) {
assertNotClosed();
final Multiset multiset = Multiset.from(c);
return newStream(this.sequential().filter(value -> multiset.getAndRemove(value) < 1).iteratorEx(), sorted);
}
@Override
public CharStream symmetricDifference(final Collection c) {
assertNotClosed();
final Multiset multiset = Multiset.from(c);
return newStream(this.sequential()
.filter(value -> multiset.getAndRemove(value) < 1)
.append(Stream.of(c).filter(value -> multiset.getAndRemove(value) > 0).mapToChar(ToCharFunction.UNBOX))
.iteratorEx(), false);
}
@Override
public CharStream reversed() {
assertNotClosed();
return newStream(new CharIteratorEx() {
private boolean initialized = false;
private char[] elements;
private int fromIndex = -1;
private int toIndex = -1;
private int cursor;
@Override
public boolean hasNext() {
if (!initialized) {
init();
}
return cursor > fromIndex;
}
@Override
public char nextChar() {
if (!initialized) {
init();
}
if (cursor <= fromIndex) {
throw new NoSuchElementException();
}
return elements[--cursor];
}
@Override
public long count() {
if (!initialized) {
init();
}
return cursor - fromIndex;
}
@Override
public void advance(long n) {
if (!initialized) {
init();
}
cursor = n < cursor - fromIndex ? cursor - (int) n : fromIndex;
}
@Override
public char[] toArray() {
if (!initialized) {
init();
}
final char[] a = new char[cursor - fromIndex];
for (int i = 0, len = cursor - fromIndex; i < len; i++) {
a[i] = elements[cursor - i - 1];
}
return a;
}
private void init() {
if (!initialized) {
initialized = true;
final Tuple3 tp = AbstractCharStream.this.arrayForIntermediateOp();
elements = tp._1;
fromIndex = tp._2;
toIndex = tp._3;
cursor = toIndex;
}
}
}, false);
}
@Override
public CharStream rotated(final int distance) {
assertNotClosed();
return newStream(new CharIteratorEx() {
private boolean initialized = false;
private char[] elements;
private int fromIndex = -1;
private int toIndex = -1;
private int len;
private int start;
private int cnt = 0;
@Override
public boolean hasNext() {
if (!initialized) {
init();
}
return cnt < len;
}
@Override
public char nextChar() {
if (!hasNext()) {
throw new NoSuchElementException();
}
return elements[((start + cnt++) % len) + fromIndex];
}
@Override
public long count() {
if (!initialized) {
init();
}
return len - cnt;
}
@Override
public void advance(long n) {
if (!initialized) {
init();
}
cnt = n < len - cnt ? cnt + (int) n : len;
}
@Override
public char[] toArray() {
if (!initialized) {
init();
}
final char[] a = new char[len - cnt];
for (int i = cnt; i < len; i++) {
a[i - cnt] = elements[((start + i) % len) + fromIndex];
}
return a;
}
private void init() {
if (!initialized) {
initialized = true;
final Tuple3 tp = AbstractCharStream.this.arrayForIntermediateOp();
elements = tp._1;
fromIndex = tp._2;
toIndex = tp._3;
len = toIndex - fromIndex;
if (len > 0) {
start = distance % len;
if (start < 0) {
start += len;
}
start = len - start;
}
}
}
}, distance == 0 && sorted);
}
@Override
public CharStream shuffled(final Random rnd) {
assertNotClosed();
checkArgNotNull(rnd, "random");
return lazyLoad(a -> {
N.shuffle(a, rnd);
return a;
}, false);
}
@Override
public CharStream sorted() {
assertNotClosed();
if (sorted) {
return newStream(iteratorEx(), sorted);
}
return lazyLoad(a -> {
if (isParallel()) {
N.parallelSort(a);
} else {
N.sort(a);
}
return a;
}, true);
}
@Override
public CharStream reverseSorted() {
assertNotClosed();
return newStream(new CharIteratorEx() {
private boolean initialized = false;
private char[] aar;
private int cursor;
@Override
public boolean hasNext() {
if (!initialized) {
init();
}
return cursor > 0;
}
@Override
public char nextChar() {
if (!initialized) {
init();
}
if (cursor <= 0) {
throw new NoSuchElementException();
}
return aar[--cursor];
}
@Override
public long count() {
if (!initialized) {
init();
}
return cursor;
}
@Override
public void advance(long n) {
if (!initialized) {
init();
}
cursor = n < cursor ? cursor - (int) n : 0;
}
@Override
public char[] toArray() {
if (!initialized) {
init();
}
final char[] a = new char[cursor];
for (int i = 0; i < cursor; i++) {
a[i] = aar[cursor - i - 1];
}
return a;
}
private void init() {
if (!initialized) {
initialized = true;
aar = AbstractCharStream.this.toArrayForIntermediateOp();
if (isParallel()) {
N.parallelSort(aar);
} else {
N.sort(aar);
}
cursor = aar.length;
}
}
}, false);
}
private CharStream lazyLoad(final Function op, final boolean sorted) {
return newStream(new CharIteratorEx() {
private boolean initialized = false;
private char[] aar;
private int cursor = 0;
private int len;
@Override
public boolean hasNext() {
if (!initialized) {
init();
}
return cursor < len;
}
@Override
public char nextChar() {
if (!initialized) {
init();
}
if (cursor >= len) {
throw new NoSuchElementException();
}
return aar[cursor++];
}
@Override
public long count() {
if (!initialized) {
init();
}
return len - cursor;
}
@Override
public void advance(long n) {
if (!initialized) {
init();
}
cursor = n > len - cursor ? len : cursor + (int) n;
}
@Override
public char[] toArray() {
if (!initialized) {
init();
}
final char[] a = new char[len - cursor];
for (int i = cursor; i < len; i++) {
a[i - cursor] = aar[i];
}
return a;
}
private void init() {
if (!initialized) {
initialized = true;
aar = op.apply(AbstractCharStream.this.toArrayForIntermediateOp());
len = aar.length;
}
}
}, sorted);
}
@Override
public CharStream cycled() {
assertNotClosed();
return newStream(new CharIterator() {
private CharIterator iter = null;
private CharList list = null;
private char[] a = null;
private int len = 0;
private int cursor = -1;
private char e = 0;
private boolean initialized = false;
@Override
public boolean hasNext() {
if (!initialized) {
init();
}
if (a == null && !iter.hasNext()) {
a = list.toArray();
len = a.length;
cursor = 0;
}
return cursor < len || iter.hasNext();
}
@Override
public char nextChar() {
if (!hasNext()) {
throw new NoSuchElementException();
}
if (len > 0) {
if (cursor >= len) {
cursor = 0;
}
return a[cursor++];
} else {
e = iter.nextChar();
list.add(e);
return e;
}
}
private void init() {
if (!initialized) {
initialized = true;
iter = AbstractCharStream.this.iteratorEx();
list = new CharList();
}
}
}, false);
}
@Override
public CharStream cycled(final long rounds) {
assertNotClosed();
checkArgNotNegative(rounds, "times");
if (rounds == 0) {
return limit(0);
} else if (rounds == 1) {
return skip(0);
}
return newStream(new CharIterator() {
private CharIterator iter = null;
private CharList list = null;
private char[] a = null;
private int len = 0;
private int cursor = -1;
private char e = 0;
private long m = 0;
private boolean initialized = false;
@Override
public boolean hasNext() {
if (!initialized) {
init();
}
if (a == null && !iter.hasNext()) {
a = list.toArray();
len = a.length;
cursor = 0;
m = 1;
}
return m < rounds && (cursor < len || rounds - m > 1) && (len > 0 || iter.hasNext());
}
@Override
public char nextChar() {
if (!hasNext()) {
throw new NoSuchElementException();
}
if (len > 0) {
if (cursor >= len) {
cursor = 0;
m++;
}
return a[cursor++];
} else {
e = iter.nextChar();
list.add(e);
return e;
}
}
private void init() {
if (!initialized) {
initialized = true;
iter = AbstractCharStream.this.iteratorEx();
list = new CharList();
}
}
}, rounds <= 1 ? this.sorted : false);
}
@Override
public Stream indexed() {
assertNotClosed();
final MutableLong idx = MutableLong.of(0);
return newStream(this.sequential().mapToObj(t -> IndexedChar.of(t, idx.getAndIncrement())).iteratorEx(), true, INDEXED_CHAR_COMPARATOR);
}
@Override
public Stream boxed() {
assertNotClosed();
return newStream(iteratorEx(), sorted, sorted ? CHAR_COMPARATOR : null);
}
@Override
@SafeVarargs
public final CharStream prepend(final char... a) {
assertNotClosed();
return prepend(CharStream.of(a));
}
@Override
public CharStream prepend(CharStream stream) {
assertNotClosed();
if (isParallel()) {
return CharStream.concat(stream, this).parallel(maxThreadNum(), splitor(), asyncExecutor(), cancelUncompletedThreads());
} else {
return CharStream.concat(stream, this);
}
}
@Override
public CharStream prepend(final OptionalChar op) {
assertNotClosed();
return prepend(op.stream());
}
@Override
@SafeVarargs
public final CharStream append(final char... a) {
assertNotClosed();
return append(CharStream.of(a));
}
@Override
public CharStream append(CharStream stream) {
assertNotClosed();
if (isParallel()) {
return CharStream.concat(this, stream).parallel(maxThreadNum(), splitor(), asyncExecutor(), cancelUncompletedThreads());
} else {
return CharStream.concat(this, stream);
}
}
@Override
public CharStream append(final OptionalChar op) {
assertNotClosed();
return prepend(op.stream());
}
@Override
@SafeVarargs
public final CharStream appendIfEmpty(final char... a) {
assertNotClosed();
return appendIfEmpty(() -> CharStream.of(a));
}
@Override
public CharStream mergeWith(CharStream b, CharBiFunction nextSelector) {
assertNotClosed();
if (isParallel()) {
return CharStream.merge(this, b, nextSelector).parallel(maxThreadNum(), splitor(), asyncExecutor(), cancelUncompletedThreads());
} else {
return CharStream.merge(this, b, nextSelector);
}
}
@Override
public CharStream zipWith(CharStream b, CharBinaryOperator zipFunction) {
assertNotClosed();
return CharStream.zip(this, b, zipFunction);
}
@Override
public CharStream zipWith(CharStream b, CharStream c, CharTernaryOperator zipFunction) {
assertNotClosed();
return CharStream.zip(this, b, c, zipFunction);
}
// @Override
// public CharStream cached() {
// return newStream(toArray(), sorted);
// }
@Override
public CharStream zipWith(CharStream b, char valueForNoneA, char valueForNoneB, CharBinaryOperator zipFunction) {
assertNotClosed();
return CharStream.zip(this, b, valueForNoneA, valueForNoneB, zipFunction);
}
@Override
public CharStream zipWith(CharStream b, CharStream c, char valueForNoneA, char valueForNoneB, char valueForNoneC, CharTernaryOperator zipFunction) {
assertNotClosed();
return CharStream.zip(this, b, c, valueForNoneA, valueForNoneB, valueForNoneC, zipFunction);
}
@Override
public Map toMap(Throwables.CharFunction keyMapper,
Throwables.CharFunction valueMapper) throws E, E2 {
assertNotClosed();
return toMap(keyMapper, valueMapper, Suppliers. ofMap());
}
@Override
public , E extends Exception, E2 extends Exception> M toMap(Throwables.CharFunction keyMapper,
Throwables.CharFunction valueMapper, Supplier mapFactory) throws E, E2 {
assertNotClosed();
return toMap(keyMapper, valueMapper, Fn. throwingMerger(), mapFactory);
}
@Override
public Map toMap(Throwables.CharFunction keyMapper,
Throwables.CharFunction valueMapper, BinaryOperator mergeFunction) throws E, E2 {
assertNotClosed();
return toMap(keyMapper, valueMapper, mergeFunction, Suppliers. ofMap());
}
@Override
public Map groupTo(Throwables.CharFunction keyMapper, final Collector downstream)
throws E {
assertNotClosed();
return groupTo(keyMapper, downstream, Suppliers. ofMap());
}
@Override
public void forEachIndexed(Throwables.IndexedCharConsumer action) throws E {
assertNotClosed();
if (isParallel()) {
final AtomicInteger idx = new AtomicInteger(0);
forEach(t -> action.accept(idx.getAndIncrement(), t));
} else {
final MutableInt idx = MutableInt.of(0);
forEach(t -> action.accept(idx.getAndIncrement(), t));
}
}
@Override
public OptionalChar first() {
assertNotClosed();
try {
final CharIterator iter = this.iteratorEx();
return iter.hasNext() ? OptionalChar.of(iter.nextChar()) : OptionalChar.empty();
} finally {
close();
}
}
@Override
public OptionalChar last() {
assertNotClosed();
try {
final CharIterator iter = this.iteratorEx();
if (!iter.hasNext()) {
return OptionalChar.empty();
}
char next = iter.nextChar();
while (iter.hasNext()) {
next = iter.nextChar();
}
return OptionalChar.of(next);
} finally {
close();
}
}
@Override
public OptionalChar onlyOne() throws DuplicatedResultException {
assertNotClosed();
try {
final CharIterator iter = this.iteratorEx();
final OptionalChar result = iter.hasNext() ? OptionalChar.of(iter.nextChar()) : OptionalChar.empty();
if (result.isPresent() && iter.hasNext()) {
throw new DuplicatedResultException("There are at least two elements: " + Strings.concat(result.get(), ", ", iter.nextChar()));
}
return result;
} finally {
close();
}
}
@Override
public OptionalChar findAny(final Throwables.CharPredicate predicate) throws E {
assertNotClosed();
return findFirst(predicate);
}
@Override
public OptionalChar findFirstOrLast(Throwables.CharPredicate predicateForFirst,
Throwables.CharPredicate predicateForLast) throws E, E2 {
assertNotClosed();
try {
final CharIteratorEx iter = iteratorEx();
MutableChar last = null;
char next = 0;
while (iter.hasNext()) {
next = iter.nextChar();
if (predicateForFirst.test(next)) {
return OptionalChar.of(next);
} else if (predicateForLast.test(next)) {
if (last == null) {
last = MutableChar.of(next);
} else {
last.setValue(next);
}
}
}
return last == null ? OptionalChar.empty() : OptionalChar.of(last.value());
} finally {
close();
}
}
@Override
public Optional> percentiles() {
assertNotClosed();
try {
final char[] a = sorted().toArray();
if (a.length == 0) {
return Optional.empty();
}
return Optional.of(N.percentiles(a));
} finally {
close();
}
}
@Override
public Pair>> summarizeAndPercentiles() {
assertNotClosed();
try {
final char[] a = sorted().toArray();
if (N.isNullOrEmpty(a)) {
return Pair.of(new CharSummaryStatistics(), Optional.> empty());
} else {
return Pair.of(new CharSummaryStatistics(a.length, sum(a), a[0], a[a.length - 1]), Optional.of(N.percentiles(a)));
}
} finally {
close();
}
}
@Override
public String join(final CharSequence delimiter, final CharSequence prefix, final CharSequence suffix) {
assertNotClosed();
try {
final Joiner joiner = Joiner.with(delimiter, prefix, suffix).reuseCachedBuffer();
final CharIteratorEx iter = this.iteratorEx();
while (iter.hasNext()) {
joiner.append(iter.nextChar());
}
return joiner.toString();
} finally {
close();
}
}
@Override
public R collect(Supplier supplier, ObjCharConsumer accumulator) {
assertNotClosed();
final BiConsumer combiner = collectingCombiner;
return collect(supplier, accumulator, combiner);
}
}
