forked from Speiger/Primitive-Collections
220 lines
5.6 KiB
Plaintext
220 lines
5.6 KiB
Plaintext
package speiger.src.collections.PACKAGE.queues;
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import java.util.Arrays;
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import java.util.NoSuchElementException;
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#if TYPE_OBJECT
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import java.util.Comparator;
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import java.util.Objects;
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#endif
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import speiger.src.collections.PACKAGE.collections.COLLECTION;
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import speiger.src.collections.PACKAGE.collections.ITERATOR;
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#if !TYPE_OBJECT
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import speiger.src.collections.PACKAGE.functions.COMPARATOR;
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#endif
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import speiger.src.collections.PACKAGE.utils.ARRAYS;
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public class ARRAY_PRIORITY_QUEUE KEY_GENERIC_TYPE implements PRIORITY_QUEUE KEY_GENERIC_TYPE
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{
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protected transient KEY_TYPE[] array = EMPTY_KEY_ARRAY;
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protected int size;
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protected int firstIndex = -1;
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protected COMPARATOR KEY_SUPER_GENERIC_TYPE comparator;
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public ARRAY_PRIORITY_QUEUE() {
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this(0, null);
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}
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public ARRAY_PRIORITY_QUEUE(COMPARATOR KEY_SUPER_GENERIC_TYPE comp) {
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this(0, comp);
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}
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public ARRAY_PRIORITY_QUEUE(int size, COMPARATOR KEY_SUPER_GENERIC_TYPE comp) {
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if(size > 0) array = NEW_KEY_ARRAY(size);
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this.size = size;
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comparator = comp;
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}
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public ARRAY_PRIORITY_QUEUE(KEY_TYPE[] array) {
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this(array, array.length);
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}
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public ARRAY_PRIORITY_QUEUE(KEY_TYPE[] array, int size) {
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this.array = Arrays.copyOf(array, size);
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this.size = size;
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}
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public ARRAY_PRIORITY_QUEUE(KEY_TYPE[] array, COMPARATOR KEY_SUPER_GENERIC_TYPE comp) {
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this(array, array.length, comp);
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}
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public ARRAY_PRIORITY_QUEUE(KEY_TYPE[] array, int size, COMPARATOR KEY_SUPER_GENERIC_TYPE comp) {
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this.array = Arrays.copyOf(array, size);
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this.size = size;
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this.comparator = comp;
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}
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public ARRAY_PRIORITY_QUEUE(COLLECTION KEY_GENERIC_TYPE c) {
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array = CAST_KEY_ARRAY c.TO_ARRAY();
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size = c.size();
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}
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public ARRAY_PRIORITY_QUEUE(COLLECTION KEY_GENERIC_TYPE c, COMPARATOR KEY_SUPER_GENERIC_TYPE comp) {
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array = CAST_KEY_ARRAY c.TO_ARRAY();
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size = c.size();
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comparator = comp;
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}
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public static GENERIC_KEY_BRACES ARRAY_PRIORITY_QUEUE KEY_GENERIC_TYPE wrap(KEY_TYPE[] array) {
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return wrap(array, array.length);
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}
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public static GENERIC_KEY_BRACES ARRAY_PRIORITY_QUEUE KEY_GENERIC_TYPE wrap(KEY_TYPE[] array, int size) {
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ARRAY_PRIORITY_QUEUE KEY_GENERIC_TYPE queue = new ARRAY_PRIORITY_QUEUEBRACES();
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queue.array = array;
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queue.size = size;
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return queue;
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}
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public static GENERIC_KEY_BRACES ARRAY_PRIORITY_QUEUE KEY_GENERIC_TYPE wrap(KEY_TYPE[] array, COMPARATOR KEY_SUPER_GENERIC_TYPE comp) {
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return wrap(array, array.length, comp);
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}
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public static GENERIC_KEY_BRACES ARRAY_PRIORITY_QUEUE KEY_GENERIC_TYPE wrap(KEY_TYPE[] array, int size, COMPARATOR KEY_SUPER_GENERIC_TYPE comp) {
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ARRAY_PRIORITY_QUEUE KEY_GENERIC_TYPE queue = new ARRAY_PRIORITY_QUEUEBRACES(comp);
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queue.array = array;
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queue.size = size;
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return queue;
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}
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@Override
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public void ENQUEUE(KEY_TYPE e) {
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if(size == array.length) array = Arrays.copyOf(array, size+1);
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if(firstIndex != -1){
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int compare = comparator == null ? COMPAREABLE_TO_KEY(e, array[firstIndex]) : comparator.compare(e, array[firstIndex]);
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if(compare < 0) firstIndex = size;
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else if(compare > 0) firstIndex = -1;
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}
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array[size++] = e;
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}
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@Override
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public KEY_TYPE DEQUEUE() {
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if(size <= 0) throw new NoSuchElementException();
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int index = findFirstIndex();
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KEY_TYPE value = array[index];
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if(index != --size) System.arraycopy(array, index+1, array, index, size - index);
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#if TYPE_OBJECT
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array[size] = null;
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#endif
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firstIndex = -1;
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return value;
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}
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@Override
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public KEY_TYPE PEEK(int index) {
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if(index < 0 || index >= size) throw new NoSuchElementException();
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return array[index];
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}
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@Override
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public boolean REMOVE(KEY_TYPE e) {
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for(int i = 0;i<size;i++)
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if(KEY_EQUALS(e, array[i])) return removeIndex(i);
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return false;
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}
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@Override
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public boolean REMOVE_LAST(KEY_TYPE e) {
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for(int i = size-1;i>=0;i--)
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if(KEY_EQUALS(e, array[i])) return removeIndex(i);
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return false;
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}
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protected boolean removeIndex(int index) {
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if(index != --size) System.arraycopy(array, index+1, array, index, size - index);
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#if TYPE_OBJECT
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array[size] = null;
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#endif
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if(index == firstIndex) firstIndex = -1;
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else if(firstIndex != -1 && index >= firstIndex) firstIndex--;
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return true;
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}
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@Override
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public void onChanged() {
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firstIndex = -1;
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}
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@Override
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public int size() {
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return size;
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}
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@Override
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public void clear() {
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#if TYPE_OBJECT
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Arrays.fill(array, null);
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#endif
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size = 0;
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}
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@Override
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public ITERATOR KEY_GENERIC_TYPE iterator() {
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return new Iter();
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}
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@Override
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public COMPARATOR KEY_SUPER_GENERIC_TYPE comparator() {
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return comparator;
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}
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@Override
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public KEY_TYPE[] TO_ARRAY(KEY_TYPE[] input) {
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if(input == null || input.length < size()) input = NEW_KEY_ARRAY(size());
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System.arraycopy(array, 0, input, 0, size());
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return input;
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}
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#if !TYPE_OBJECT
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@Override
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public CLASS_TYPE[] toArray(CLASS_TYPE[] input) {
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if(input == null || input.length < size()) input = new CLASS_TYPE[size()];
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for(int i = 0;i<size;i++) input[i] = KEY_TO_OBJ(array[i]);
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return input;
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}
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#endif
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protected int findFirstIndex() {
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if(firstIndex == -1) {
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int index = size-1;
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KEY_TYPE value = array[index];
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if(comparator == null) {
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for(int i = index;i>=0;i--) {
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if(COMPAREABLE_TO_KEY(array[i], value) < 0)
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value = array[index = i];
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}
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}
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else {
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for(int i = index;i>=0;i--) {
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if(comparator.compare(array[i], value) < 0)
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value = array[index = i];
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}
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}
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firstIndex = index;
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}
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return firstIndex;
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}
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public class Iter implements ITERATOR KEY_GENERIC_TYPE {
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@Override
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public boolean hasNext() {
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return !isEmpty();
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}
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@Override
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public KEY_TYPE NEXT() {
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return DEQUEUE();
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}
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}
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} |