forked from Speiger/Primitive-Collections
790 lines
24 KiB
Plaintext
790 lines
24 KiB
Plaintext
package speiger.src.collections.PACKAGE.utils;
|
|
|
|
import java.util.Iterator;
|
|
import java.util.NoSuchElementException;
|
|
|
|
import speiger.src.collections.PACKAGE.collections.ITERATOR;
|
|
#if !TYPE_OBJECT
|
|
import speiger.src.collections.objects.collections.ObjectIterator;
|
|
import speiger.src.collections.objects.utils.ObjectIterators;
|
|
#endif
|
|
import speiger.src.collections.PACKAGE.functions.function.TO_OBJECT_FUNCTION;
|
|
import speiger.src.collections.PACKAGE.functions.function.PREDICATE;
|
|
import speiger.src.collections.PACKAGE.lists.ARRAY_LIST;
|
|
import speiger.src.collections.PACKAGE.lists.LIST;
|
|
import speiger.src.collections.PACKAGE.lists.LIST_ITERATOR;
|
|
import speiger.src.collections.PACKAGE.collections.BI_ITERATOR;
|
|
import speiger.src.collections.PACKAGE.collections.COLLECTION;
|
|
|
|
/**
|
|
* A Helper class for Iterators
|
|
*/
|
|
public class ITERATORS
|
|
{
|
|
/**
|
|
* Empty Iterator Reference
|
|
*/
|
|
public static final EmptyIterator NO_GENERIC_TYPE EMPTY = new EmptyIteratorBRACES();
|
|
|
|
/**
|
|
* Returns a Immutable EmptyIterator instance that is automatically casted.
|
|
* @Type(T)
|
|
* @return an empty iterator
|
|
*/
|
|
public static GENERIC_KEY_BRACES EmptyIterator KEY_GENERIC_TYPE empty() {
|
|
#if TYPE_OBJECT
|
|
return (EmptyIterator<KEY_TYPE>)EMPTY;
|
|
#else
|
|
return EMPTY;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Inverter function for Bidirectional Iterators
|
|
* @param it the iterator that should be inverted
|
|
* @Type(T)
|
|
* @return a Inverted Bidirectional Iterator. If it was inverted then it just gives back the original reference
|
|
*/
|
|
public static GENERIC_KEY_BRACES BI_ITERATOR KEY_GENERIC_TYPE invert(BI_ITERATOR KEY_GENERIC_TYPE it) {
|
|
return it instanceof ReverseBiIterator ? ((ReverseBiIterator KEY_GENERIC_TYPE)it).it : new ReverseBiIteratorBRACES(it);
|
|
}
|
|
|
|
/**
|
|
* Inverter function for List Iterators
|
|
* @param it the iterator that should be inverted
|
|
* @Type(T)
|
|
* @return a Inverted List Iterator. If it was inverted then it just gives back the original reference
|
|
*/
|
|
public static GENERIC_KEY_BRACES LIST_ITERATOR KEY_GENERIC_TYPE invert(LIST_ITERATOR KEY_GENERIC_TYPE it) {
|
|
return it instanceof ReverseListIterator ? ((ReverseListIterator KEY_GENERIC_TYPE)it).it : new ReverseListIteratorBRACES(it);
|
|
}
|
|
|
|
/**
|
|
* Returns a Immutable Iterator instance based on the instance given.
|
|
* @param iterator that should be made immutable/unmodifiable
|
|
* @Type(T)
|
|
* @return a unmodifiable iterator wrapper. If the Iterator already a unmodifiable wrapper then it just returns itself.
|
|
*/
|
|
public static GENERIC_KEY_BRACES ITERATOR KEY_GENERIC_TYPE unmodifiable(ITERATOR KEY_GENERIC_TYPE iterator) {
|
|
return iterator instanceof UnmodifiableIterator ? iterator : new UnmodifiableIteratorBRACES(iterator);
|
|
}
|
|
|
|
/**
|
|
* Returns a Immutable Iterator instance based on the instance given.
|
|
* @param iterator that should be made immutable/unmodifiable
|
|
* @Type(T)
|
|
* @return a unmodifiable iterator wrapper. If the Iterator already a unmodifiable wrapper then it just returns itself.
|
|
*/
|
|
public static GENERIC_KEY_BRACES BI_ITERATOR KEY_GENERIC_TYPE unmodifiable(BI_ITERATOR KEY_GENERIC_TYPE iterator) {
|
|
return iterator instanceof UnmodifiableBiIterator ? iterator : new UnmodifiableBiIteratorBRACES(iterator);
|
|
}
|
|
|
|
/**
|
|
* Returns a Immutable ListIterator instance based on the instance given.
|
|
* @param iterator that should be made immutable/unmodifiable
|
|
* @Type(T)
|
|
* @return a unmodifiable listiterator wrapper. If the ListIterator already a unmodifiable wrapper then it just returns itself.
|
|
*/
|
|
public static GENERIC_KEY_BRACES LIST_ITERATOR KEY_GENERIC_TYPE unmodifiable(LIST_ITERATOR KEY_GENERIC_TYPE iterator) {
|
|
return iterator instanceof UnmodifiableListIterator ? iterator : new UnmodifiableListIteratorBRACES(iterator);
|
|
}
|
|
|
|
/**
|
|
* A Helper function that maps a Iterator into a new Type.
|
|
* @param iterator that should be mapped
|
|
* @param mapper the function that decides what the result turns into.
|
|
* @Type(T)
|
|
* @param <E> The return type.
|
|
* @return a iterator that is mapped to a new result
|
|
*/
|
|
public static GENERIC_KEY_SPECIAL_BRACES<E> ObjectIterator<E> map(ITERATOR KEY_GENERIC_TYPE iterator, TO_OBJECT_FUNCTION KKS_GENERIC_TYPE<E> mapper) {
|
|
return new MappedIterator<>(iterator, mapper);
|
|
}
|
|
|
|
/**
|
|
* A Helper function that flatMaps a Iterator into a new Type.
|
|
* @param iterator that should be flatMapped
|
|
* @param mapper the function that decides what the result turns into.
|
|
* @Type(T)
|
|
* @param <V> The return type supplier.
|
|
* @param <E> The return type.
|
|
* @return a iterator that is flatMapped to a new result
|
|
*/
|
|
public static GENERIC_KEY_SPECIAL_BRACES<E, V extends Iterable<E>> ObjectIterator<E> flatMap(ITERATOR KEY_GENERIC_TYPE iterator, TO_OBJECT_FUNCTION KKS_GENERIC_TYPE<V> mapper) {
|
|
return new FlatMappedIterator<>(iterator, mapper);
|
|
}
|
|
|
|
/**
|
|
* A Helper function that flatMaps a Iterator into a new Type.
|
|
* @param iterator that should be flatMapped
|
|
* @param mapper the function that decides what the result turns into.
|
|
* @Type(T)
|
|
* @param <E> The return type.
|
|
* @return a iterator that is flatMapped to a new result
|
|
*/
|
|
public static GENERIC_KEY_SPECIAL_BRACES<E> ObjectIterator<E> arrayFlatMap(ITERATOR KEY_GENERIC_TYPE iterator, TO_OBJECT_FUNCTION KKS_GENERIC_TYPE<E[]> mapper) {
|
|
return new FlatMappedArrayIterator<>(iterator, mapper);
|
|
}
|
|
|
|
/**
|
|
* A Helper function that filters out all desired elements
|
|
* @param iterator that should be filtered.
|
|
* @param filter the filter that decides that should be let through
|
|
* @Type(T)
|
|
* @return a filtered iterator
|
|
*/
|
|
public static GENERIC_KEY_BRACES ITERATOR KEY_GENERIC_TYPE filter(ITERATOR KEY_GENERIC_TYPE iterator, PREDICATE KEY_GENERIC_TYPE filter) {
|
|
return new FilteredIteratorBRACES(iterator, filter);
|
|
}
|
|
|
|
/**
|
|
* Helper function to convert a Object Iterator into a Primitive Iterator
|
|
* @param iterator that should be converted to a unboxing iterator
|
|
* @ArrayType(T)
|
|
* @return a primitive iterator
|
|
*/
|
|
public static GENERIC_KEY_BRACES ITERATOR KEY_GENERIC_TYPE wrap(Iterator<? extends CLASS_TYPE> iterator) {
|
|
return iterator instanceof ITERATOR ? (ITERATOR KEY_GENERIC_TYPE)iterator : new IteratorWrapperBRACES(iterator);
|
|
}
|
|
|
|
/**
|
|
* Returns a Array Wrapping iterator
|
|
* @param a the array that should be wrapped
|
|
* @ArrayType(T)
|
|
* @return a Iterator that is wrapping a array.
|
|
*/
|
|
public static GENERIC_KEY_BRACES ArrayIterator KEY_GENERIC_TYPE wrap(KEY_TYPE[] a) {
|
|
return wrap(a, 0, a.length);
|
|
}
|
|
|
|
/**
|
|
* Returns a Array Wrapping iterator
|
|
* @param a the array that should be wrapped.
|
|
* @param start the index to be started from.
|
|
* @param end the index that should be ended.
|
|
* @ArrayType(T)
|
|
* @return a Iterator that is wrapping a array.
|
|
*/
|
|
public static GENERIC_KEY_BRACES ArrayIterator KEY_GENERIC_TYPE wrap(KEY_TYPE[] a, int start, int end) {
|
|
return new ArrayIteratorBRACES(a, start, end);
|
|
}
|
|
|
|
/**
|
|
* Iterates over a iterator and inserts the values into the array and returns the amount that was inserted
|
|
* @param a where the elements should be inserted
|
|
* @param i the source iterator
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were inserted into the array.
|
|
*/
|
|
public static GENERIC_KEY_BRACES int unwrap(KEY_TYPE[] a, Iterator<? extends CLASS_TYPE> i) {
|
|
return unwrap(a, i, 0, a.length);
|
|
}
|
|
|
|
/**
|
|
* Iterates over a iterator and inserts the values into the array and returns the amount that was inserted
|
|
* @param a where the elements should be inserted
|
|
* @param i the source iterator
|
|
* @param offset the array offset where the start should be
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were inserted into the array.
|
|
*/
|
|
public static GENERIC_KEY_BRACES int unwrap(KEY_TYPE[] a, Iterator<? extends CLASS_TYPE> i, int offset) {
|
|
return unwrap(a, i, offset, a.length - offset);
|
|
}
|
|
|
|
/**
|
|
* Iterates over a iterator and inserts the values into the array and returns the amount that was inserted
|
|
* @param a where the elements should be inserted
|
|
* @param i the source iterator
|
|
* @param offset the array offset where the start should be
|
|
* @param max the maximum values that should be extracted from the source
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were inserted into the array.
|
|
* @throws IllegalStateException if max is smaller the 0 or if the maximum index is larger then the array
|
|
*/
|
|
public static GENERIC_KEY_BRACES int unwrap(KEY_TYPE[] a, Iterator<? extends CLASS_TYPE> i, int offset, int max) {
|
|
if(max < 0) throw new IllegalStateException("The max size is smaller then 0");
|
|
if(offset + max > a.length) throw new IllegalStateException("largest array index exceeds array size");
|
|
int index = 0;
|
|
for(;index<max && i.hasNext();index++) a[index+offset] = OBJ_TO_KEY(i.next());
|
|
return index;
|
|
}
|
|
|
|
/**
|
|
* A Primitive iterator variant of the ITERATORS unwrap function
|
|
* Iterates over a iterator and inserts the values into the array and returns the amount that was inserted
|
|
* @param a where the elements should be inserted
|
|
* @param i the source iterator
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were inserted into the array.
|
|
*/
|
|
public static GENERIC_KEY_BRACES int unwrap(KEY_TYPE[] a, ITERATOR KEY_GENERIC_TYPE i) {
|
|
return unwrap(a, i, 0, a.length);
|
|
}
|
|
|
|
/**
|
|
* A Primitive iterator variant of the ITERATORS unwrap function
|
|
* Iterates over a iterator and inserts the values into the array and returns the amount that was inserted
|
|
* @param a where the elements should be inserted
|
|
* @param i the source iterator
|
|
* @param offset the array offset where the start should be
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were inserted into the array.
|
|
*/
|
|
public static GENERIC_KEY_BRACES int unwrap(KEY_TYPE[] a, ITERATOR KEY_GENERIC_TYPE i, int offset) {
|
|
return unwrap(a, i, offset, a.length - offset);
|
|
}
|
|
|
|
/**
|
|
* A Primitive iterator variant of the ITERATORS unwrap function
|
|
* Iterates over a iterator and inserts the values into the array and returns the amount that was inserted
|
|
* @param a where the elements should be inserted
|
|
* @param i the source iterator
|
|
* @param offset the array offset where the start should be
|
|
* @param max the maximum values that should be extracted from the source
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were inserted into the array.
|
|
* @throws IllegalStateException if max is smaller the 0 or if the maximum index is larger then the array
|
|
*/
|
|
public static GENERIC_KEY_BRACES int unwrap(KEY_TYPE[] a, ITERATOR KEY_GENERIC_TYPE i, int offset, int max) {
|
|
if(max < 0) throw new IllegalStateException("The max size is smaller then 0");
|
|
if(offset + max > a.length) throw new IllegalStateException("largest array index exceeds array size");
|
|
int index = 0;
|
|
for(;index<max && i.hasNext();index++) a[index+offset] = i.NEXT();
|
|
return index;
|
|
}
|
|
|
|
#if !TYPE_OBJECT
|
|
/**
|
|
* A Function to convert a Primitive Iterator to a Object array.
|
|
* Iterates over a iterator and inserts the values into the array and returns the amount that was inserted
|
|
* @param a where the elements should be inserted
|
|
* @param i the source iterator
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were inserted into the array.
|
|
*/
|
|
public static GENERIC_KEY_BRACES int unwrap(CLASS_TYPE[] a, ITERATOR KEY_GENERIC_TYPE i) {
|
|
return unwrap(a, i, 0, a.length);
|
|
}
|
|
|
|
/**
|
|
* A Function to convert a Primitive Iterator to a Object array.
|
|
* Iterates over a iterator and inserts the values into the array and returns the amount that was inserted
|
|
* @param a where the elements should be inserted
|
|
* @param i the source iterator
|
|
* @param offset the array offset where the start should be
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were inserted into the array.
|
|
*/
|
|
public static GENERIC_KEY_BRACES int unwrap(CLASS_TYPE[] a, ITERATOR KEY_GENERIC_TYPE i, int offset) {
|
|
return unwrap(a, i, offset, a.length - offset);
|
|
}
|
|
|
|
/**
|
|
* A Function to convert a Primitive Iterator to a Object array.
|
|
* Iterates over a iterator and inserts the values into the array and returns the amount that was inserted
|
|
* @param a where the elements should be inserted
|
|
* @param i the source iterator
|
|
* @param offset the array offset where the start should be
|
|
* @param max the maximum values that should be extracted from the source
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were inserted into the array.
|
|
* @throws IllegalStateException if max is smaller the 0 or if the maximum index is larger then the array
|
|
*/
|
|
public static GENERIC_KEY_BRACES int unwrap(CLASS_TYPE[] a, ITERATOR KEY_GENERIC_TYPE i, int offset, int max) {
|
|
if(max < 0) throw new IllegalStateException("The max size is smaller then 0");
|
|
if(offset + max > a.length) throw new IllegalStateException("largest array index exceeds array size");
|
|
int index = 0;
|
|
for(;index<max && i.hasNext();index++) a[index+offset] = KEY_TO_OBJ(i.NEXT());
|
|
return index;
|
|
}
|
|
|
|
#endif
|
|
/**
|
|
* A Helper function to pours all elements of a Iterator into a List
|
|
* @param iter the elements that should be poured into list.
|
|
* @ArrayType(T)
|
|
* @return A list of all elements of the Iterator
|
|
*/
|
|
public static GENERIC_KEY_BRACES LIST KEY_GENERIC_TYPE pour(ITERATOR KEY_GENERIC_TYPE iter) {
|
|
return pour(iter, Integer.MAX_VALUE);
|
|
}
|
|
|
|
/**
|
|
* A Helper function to pours all elements of a Iterator into a List
|
|
* @param iter the elements that should be poured into list.
|
|
* @param max the maximum amount of elements that should be collected
|
|
* @ArrayType(T)
|
|
* @return A list of all requested elements of the Iterator
|
|
*/
|
|
public static GENERIC_KEY_BRACES LIST KEY_GENERIC_TYPE pour(ITERATOR KEY_GENERIC_TYPE iter, int max) {
|
|
ARRAY_LIST KEY_GENERIC_TYPE list = new ARRAY_LISTBRACES();
|
|
pour(iter, list, max);
|
|
list.trim();
|
|
return list;
|
|
}
|
|
|
|
/**
|
|
* A Helper function to pours all elements of a Iterator into a Collection
|
|
* @param iter the elements that should be poured into list.
|
|
* @param c the collection where the elements should be poured into
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were added
|
|
*/
|
|
public static GENERIC_KEY_BRACES int pour(ITERATOR KEY_GENERIC_TYPE iter, COLLECTION KEY_GENERIC_TYPE c) {
|
|
return pour(iter, c, Integer.MAX_VALUE);
|
|
}
|
|
|
|
/**
|
|
* A Helper function to pours all elements of a Iterator into a Collection
|
|
* @param iter the elements that should be poured into list.
|
|
* @param c the collection where the elements should be poured into
|
|
* @param max the maximum amount of elements that should be collected
|
|
* @ArrayType(T)
|
|
* @return the amount of elements that were added
|
|
*/
|
|
public static GENERIC_KEY_BRACES int pour(ITERATOR KEY_GENERIC_TYPE iter, COLLECTION KEY_GENERIC_TYPE c, int max) {
|
|
if(max < 0) throw new IllegalStateException("Max is negative");
|
|
int done = 0;
|
|
for(;done<max && iter.hasNext();done++, c.add(iter.NEXT()));
|
|
return done;
|
|
}
|
|
|
|
/**
|
|
* Helper Iterator that concats other iterators together
|
|
* @param array the Iterators that should be concatenated
|
|
* @ArrayType(T)
|
|
* @return iterator of the inputted iterators
|
|
*/
|
|
public static GENERIC_KEY_BRACES ITERATOR KEY_GENERIC_TYPE concat(ITERATOR KEY_GENERIC_TYPE... array) {
|
|
return concat(array, 0, array.length);
|
|
}
|
|
|
|
/**
|
|
* Helper Iterator that concats other iterators together
|
|
* @param array the Iterators that should be concatenated
|
|
* @param offset where to start within the array
|
|
* @param length the length of the array
|
|
* @ArrayType(T)
|
|
* @return iterator of the inputted iterators
|
|
*/
|
|
public static GENERIC_KEY_BRACES ITERATOR KEY_GENERIC_TYPE concat(ITERATOR KEY_GENERIC_TYPE[] array, int offset, int length) {
|
|
return new ConcatIteratorBRACES(array, offset, length);
|
|
}
|
|
|
|
private static class IteratorWrapper KEY_GENERIC_TYPE implements ITERATOR KEY_GENERIC_TYPE
|
|
{
|
|
Iterator<? extends CLASS_TYPE> iter;
|
|
|
|
public IteratorWrapper(Iterator<? extends CLASS_TYPE> iter) {
|
|
this.iter = iter;
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
return iter.hasNext();
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() {
|
|
return OBJ_TO_KEY(iter.next());
|
|
}
|
|
|
|
#if !TYPE_OBJECT
|
|
@Override
|
|
@Deprecated
|
|
public CLASS_TYPE next() {
|
|
return iter.next();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
private static class ConcatIterator KEY_GENERIC_TYPE implements ITERATOR KEY_GENERIC_TYPE
|
|
{
|
|
ITERATOR KEY_GENERIC_TYPE[] iters;
|
|
int offset;
|
|
int lastOffset = -1;
|
|
int length;
|
|
|
|
public ConcatIterator(ITERATOR KEY_GENERIC_TYPE[] iters, int offset, int length) {
|
|
this.iters = iters;
|
|
this.offset = offset;
|
|
this.length = length;
|
|
find();
|
|
}
|
|
|
|
private void find() {
|
|
for(;length != 0 && !iters[offset].hasNext();length--, offset++);
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
return length > 0;
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() {
|
|
if(!hasNext()) throw new NoSuchElementException();
|
|
KEY_TYPE result = iters[lastOffset = offset].NEXT();
|
|
find();
|
|
return result;
|
|
}
|
|
|
|
@Override
|
|
public void remove() {
|
|
if(lastOffset == -1) throw new IllegalStateException();
|
|
iters[lastOffset].remove();
|
|
lastOffset = -1;
|
|
}
|
|
}
|
|
|
|
private static class ReverseBiIterator KEY_GENERIC_TYPE implements BI_ITERATOR KEY_GENERIC_TYPE {
|
|
BI_ITERATOR KEY_GENERIC_TYPE it;
|
|
|
|
ReverseBiIterator(BI_ITERATOR KEY_GENERIC_TYPE it) {
|
|
this.it = it;
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() { return it.PREVIOUS(); }
|
|
@Override
|
|
public boolean hasNext() { return it.hasPrevious(); }
|
|
@Override
|
|
public boolean hasPrevious() { return it.hasNext(); }
|
|
@Override
|
|
public KEY_TYPE PREVIOUS() { return it.NEXT(); }
|
|
@Override
|
|
public void remove() { it.remove(); }
|
|
}
|
|
|
|
private static class ReverseListIterator KEY_GENERIC_TYPE implements LIST_ITERATOR KEY_GENERIC_TYPE {
|
|
LIST_ITERATOR KEY_GENERIC_TYPE it;
|
|
|
|
ReverseListIterator(LIST_ITERATOR KEY_GENERIC_TYPE it) {
|
|
this.it = it;
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() { return it.PREVIOUS(); }
|
|
@Override
|
|
public boolean hasNext() { return it.hasPrevious(); }
|
|
@Override
|
|
public boolean hasPrevious() { return it.hasNext(); }
|
|
@Override
|
|
public KEY_TYPE PREVIOUS() { return it.NEXT(); }
|
|
@Override
|
|
public void remove() { it.remove(); }
|
|
@Override
|
|
public int nextIndex() { return it.previousIndex(); }
|
|
@Override
|
|
public int previousIndex() { return it.nextIndex(); }
|
|
@Override
|
|
public void set(KEY_TYPE e) { it.set(e); }
|
|
@Override
|
|
public void add(KEY_TYPE e) { it.add(e); }
|
|
}
|
|
|
|
private static class UnmodifiableListIterator KEY_GENERIC_TYPE implements LIST_ITERATOR KEY_GENERIC_TYPE
|
|
{
|
|
LIST_ITERATOR KEY_GENERIC_TYPE iter;
|
|
|
|
UnmodifiableListIterator(LIST_ITERATOR KEY_GENERIC_TYPE iter) {
|
|
this.iter = iter;
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
return iter.hasNext();
|
|
}
|
|
|
|
@Override
|
|
public boolean hasPrevious() {
|
|
return iter.hasPrevious();
|
|
}
|
|
|
|
@Override
|
|
public int nextIndex() {
|
|
return iter.nextIndex();
|
|
}
|
|
|
|
@Override
|
|
public int previousIndex() {
|
|
return iter.previousIndex();
|
|
}
|
|
|
|
@Override
|
|
public void remove() { throw new UnsupportedOperationException(); }
|
|
|
|
@Override
|
|
public KEY_TYPE PREVIOUS() {
|
|
return iter.PREVIOUS();
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() {
|
|
return iter.NEXT();
|
|
}
|
|
|
|
@Override
|
|
public void set(KEY_TYPE e) { throw new UnsupportedOperationException(); }
|
|
|
|
@Override
|
|
public void add(KEY_TYPE e) { throw new UnsupportedOperationException(); }
|
|
}
|
|
|
|
private static class UnmodifiableBiIterator KEY_GENERIC_TYPE implements BI_ITERATOR KEY_GENERIC_TYPE
|
|
{
|
|
BI_ITERATOR KEY_GENERIC_TYPE iter;
|
|
|
|
UnmodifiableBiIterator(BI_ITERATOR KEY_GENERIC_TYPE iter) {
|
|
this.iter = iter;
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() {
|
|
return iter.NEXT();
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
return iter.hasNext();
|
|
}
|
|
|
|
@Override
|
|
public boolean hasPrevious() {
|
|
return iter.hasPrevious();
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE PREVIOUS() {
|
|
return iter.PREVIOUS();
|
|
}
|
|
}
|
|
|
|
private static class UnmodifiableIterator KEY_GENERIC_TYPE implements ITERATOR KEY_GENERIC_TYPE
|
|
{
|
|
ITERATOR KEY_GENERIC_TYPE iterator;
|
|
|
|
UnmodifiableIterator(ITERATOR KEY_GENERIC_TYPE iterator) {
|
|
this.iterator = iterator;
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
return iterator.hasNext();
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() {
|
|
return iterator.NEXT();
|
|
}
|
|
}
|
|
|
|
private static class EmptyIterator KEY_GENERIC_TYPE implements LIST_ITERATOR KEY_GENERIC_TYPE
|
|
{
|
|
@Override
|
|
public boolean hasNext() {
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() {
|
|
return EMPTY_KEY_VALUE;
|
|
}
|
|
|
|
@Override
|
|
public boolean hasPrevious() {
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE PREVIOUS() {
|
|
return EMPTY_KEY_VALUE;
|
|
}
|
|
|
|
@Override
|
|
public int nextIndex() {
|
|
return 0;
|
|
}
|
|
|
|
@Override
|
|
public int previousIndex() {
|
|
return 0;
|
|
}
|
|
|
|
@Override
|
|
public void remove() { throw new UnsupportedOperationException(); }
|
|
|
|
@Override
|
|
public void set(KEY_TYPE e) { throw new UnsupportedOperationException(); }
|
|
|
|
@Override
|
|
public void add(KEY_TYPE e) { throw new UnsupportedOperationException(); }
|
|
}
|
|
|
|
private static class ArrayIterator KEY_GENERIC_TYPE implements ITERATOR KEY_GENERIC_TYPE
|
|
{
|
|
KEY_TYPE[] a;
|
|
int from;
|
|
int to;
|
|
|
|
ArrayIterator(KEY_TYPE[] a, int from, int to) {
|
|
this.a = a;
|
|
this.from = from;
|
|
this.to = to;
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
return from < to;
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() {
|
|
return a[from++];
|
|
}
|
|
|
|
@Override
|
|
public int skip(int amount) {
|
|
if(amount < 0) throw new IllegalStateException("Negative Numbers are not allowed");
|
|
int left = Math.min(amount, to - from);
|
|
from += left;
|
|
return amount - left;
|
|
}
|
|
}
|
|
|
|
private static class MappedIterator KSS_GENERIC_TYPE<E, T> implements ObjectIterator<T>
|
|
{
|
|
ITERATOR KEY_SPECIAL_GENERIC_TYPE<E> iterator;
|
|
TO_OBJECT_FUNCTION KSS_GENERIC_TYPE<E, T> mapper;
|
|
|
|
MappedIterator(ITERATOR KEY_SPECIAL_GENERIC_TYPE<E> iterator, TO_OBJECT_FUNCTION KSS_GENERIC_TYPE<E, T> mapper) {
|
|
this.iterator = iterator;
|
|
this.mapper = mapper;
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
return iterator.hasNext();
|
|
}
|
|
|
|
@Override
|
|
public T next() {
|
|
return mapper.GET_VALUE(iterator.NEXT());
|
|
}
|
|
|
|
@Override
|
|
public int skip(int amount) {
|
|
return iterator.skip(amount);
|
|
}
|
|
}
|
|
|
|
private static class FlatMappedIterator KSS_GENERIC_TYPE<E, T,[SPACE]V extends Iterable<T>> implements ObjectIterator<T>
|
|
{
|
|
ITERATOR KEY_SPECIAL_GENERIC_TYPE<E> iterator;
|
|
Iterator<T> last = null;
|
|
TO_OBJECT_FUNCTION KSS_GENERIC_TYPE<E, V> mapper;
|
|
boolean foundNext = false;
|
|
|
|
FlatMappedIterator(ITERATOR KEY_SPECIAL_GENERIC_TYPE<E> iterator, TO_OBJECT_FUNCTION KSS_GENERIC_TYPE<E, V> mapper) {
|
|
this.iterator = iterator;
|
|
this.mapper = mapper;
|
|
}
|
|
|
|
void compute() {
|
|
if(foundNext) return;
|
|
foundNext = true;
|
|
while(iterator.hasNext()) {
|
|
if(last != null && last.hasNext()) return;
|
|
last = mapper.GET_VALUE(iterator.NEXT()).iterator();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
compute();
|
|
return last != null && last.hasNext();
|
|
}
|
|
|
|
@Override
|
|
public T next() {
|
|
if(!hasNext()) throw new IllegalStateException("End of Iterator");
|
|
T result = last.next();
|
|
foundNext = false;
|
|
return result;
|
|
}
|
|
}
|
|
|
|
private static class FlatMappedArrayIterator KSS_GENERIC_TYPE<E, T> implements ObjectIterator<T>
|
|
{
|
|
ITERATOR KEY_SPECIAL_GENERIC_TYPE<E> iterator;
|
|
Iterator<T> last = null;
|
|
TO_OBJECT_FUNCTION KSS_GENERIC_TYPE<E, T[]> mapper;
|
|
boolean foundNext = false;
|
|
|
|
FlatMappedArrayIterator(ITERATOR KEY_SPECIAL_GENERIC_TYPE<E> iterator, TO_OBJECT_FUNCTION KSS_GENERIC_TYPE<E, T[]> mapper) {
|
|
this.iterator = iterator;
|
|
this.mapper = mapper;
|
|
}
|
|
|
|
void compute() {
|
|
if(foundNext) return;
|
|
foundNext = true;
|
|
while(iterator.hasNext()) {
|
|
if(last != null && last.hasNext()) return;
|
|
last = ObjectIterators.wrap(mapper.GET_VALUE(iterator.NEXT()));
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
compute();
|
|
return last != null && last.hasNext();
|
|
}
|
|
|
|
@Override
|
|
public T next() {
|
|
if(!hasNext()) throw new IllegalStateException("End of Iterator");
|
|
T result = last.next();
|
|
foundNext = false;
|
|
return result;
|
|
}
|
|
}
|
|
|
|
private static class FilteredIterator KEY_GENERIC_TYPE implements ITERATOR KEY_GENERIC_TYPE
|
|
{
|
|
ITERATOR KEY_GENERIC_TYPE iterator;
|
|
PREDICATE KEY_GENERIC_TYPE filter;
|
|
KEY_TYPE lastFound;
|
|
boolean foundNext = false;
|
|
|
|
public FilteredIterator(ITERATOR KEY_GENERIC_TYPE iterator, PREDICATE KEY_GENERIC_TYPE filter) {
|
|
this.iterator = iterator;
|
|
this.filter = filter;
|
|
}
|
|
|
|
void compute() {
|
|
if(foundNext) return;
|
|
while(iterator.hasNext()) {
|
|
lastFound = iterator.NEXT();
|
|
if(filter.TEST_VALUE(lastFound)) {
|
|
foundNext = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean hasNext() {
|
|
compute();
|
|
return foundNext;
|
|
}
|
|
|
|
@Override
|
|
public KEY_TYPE NEXT() {
|
|
if(!hasNext()) throw new IllegalStateException("End of Iterator");
|
|
foundNext = false;
|
|
return lastFound;
|
|
}
|
|
}
|
|
} |