/**
* Copyright 2014
*
* 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.
*
* @project loon
* @author cping
* @email：javachenpeng@yahoo.com
* @version 0.4.2
*/
package loon.utils.collection;
import loon.core.LRelease;
import loon.utils.CollectionUtils;
import loon.utils.MathUtils;
public class Array<T> implements LRelease {
public static class ArrayNode<T> {
public ArrayNode<T> next;
public ArrayNode<T> previous;
public T data;
public ArrayNode() {
this.next = null;
this.previous = null;
this.data = null;
}
}
private ArrayNode<T> _items = null;
private int _length;
private boolean _close;
private ArrayNode<T> _next_tmp = null, _previous_tmp = null;
private int _next_count = 0, _previous_count = 0;
public Array() {
clear();
}
public void insertBetween(Array<T> previous, Array<T> next, Array<T> newNode) {
insertBetween(previous._items, next._items, newNode._items);
}
public void insertBetween(ArrayNode<T> previous, ArrayNode<T> next,
ArrayNode<T> newNode) {
if (_close) {
return;
}
if (previous == this._items && next != this._items) {
this.addFront(newNode.data);
} else if (previous != this._items && next == this._items) {
this.addBack(newNode.data);
} else {
newNode.next = next;
newNode.previous = previous;
previous.next = newNode;
next.previous = newNode;
}
}
public void addAll(Array<T> data) {
for (int i = 0; i < data.size(); i++) {
add(data.get(i));
}
}
public Array<T> concat(Array<T> data) {
Array<T> list = new Array<T>();
list.addAll(this);
list.addAll(data);
return list;
}
public Array<T> slice(int start) {
return slice(start, this.size());
}
public Array<T> slice(int start, int end) {
Array<T> list = new Array<T>();
for (int i = start; i < end; i++) {
list.add(get(i));
}
return list;
}
public void add(T data) {
ArrayNode<T> newNode = new ArrayNode<T>();
ArrayNode<T> o = this._items.next;
newNode.data = data;
if (o == this._items) {
this.addFront(data);
} else {
for (; o != this._items;) {
o = o.next;
}
if (o == this._items) {
this.addBack(newNode.data);
}
}
}
public void addFront(T data) {
if (_close) {
return;
}
ArrayNode<T> newNode = new ArrayNode<T>();
newNode.data = data;
newNode.next = this._items.next;
this._items.next.previous = newNode;
this._items.next = newNode;
newNode.previous = this._items;
_length++;
}
public void addBack(T data) {
if (_close) {
return;
}
ArrayNode<T> newNode = new ArrayNode<T>();
newNode.data = data;
newNode.previous = this._items.previous;
this._items.previous.next = newNode;
this._items.previous = newNode;
newNode.next = this._items;
_length++;
}
public T get(int idx) {
if (_close) {
return null;
}
int size = _length - 1;
if (0 <= idx && idx <= size) {
ArrayNode<T> o = this._items.next;
int count = 0;
for (; count < idx;) {
o = o.next;
count++;
}
return o.data;
} else if (idx == size) {
return _items.data;
}
return null;
}
public void set(int idx, T v) {
if (_close) {
return;
}
int size = _length - 1;
if (0 <= idx && idx <= size) {
ArrayNode<T> o = this._items.next;
int count = 0;
for (; count < idx;) {
o = o.next;
count++;
}
o.data = v;
} else if (idx == size) {
_items.data = v;
} else if (idx > size) {
for (int i = size; i < idx; i++) {
add(null);
}
set(idx, v);
}
}
public ArrayNode<T> node() {
return _items;
}
public boolean contains(T data) {
return contains(data, false);
}
public boolean contains(T data, boolean identity) {
if (_close) {
return false;
}
ArrayNode<T> o = this._items.next;
for (; o != this._items;) {
if ((identity || data == null) && o.data == data) {
return true;
} else if (data.equals(o.data)) {
return true;
}
o = o.next;
}
return false;
}
public int indexOf(T data) {
return indexOf(data, false);
}
public int indexOf(T data, boolean identity) {
if (_close) {
return -1;
}
int count = 0;
ArrayNode<T> o = this._items.next;
for (; o != this._items && count < _length;) {
if ((identity || data == null) && o.data == data) {
return count;
} else if (data.equals(o.data)) {
return count;
}
o = o.next;
count++;
}
return -1;
}
public int lastIndexOf(T data) {
return lastIndexOf(data, false);
}
public int lastIndexOf(T data, boolean identity) {
if (_close) {
return -1;
}
int count = _length - 1;
ArrayNode<T> o = this._items.previous;
for (; o != this._items && count > 0;) {
if ((identity || data == null) && o.data == data) {
return count;
} else if (data.equals(o.data)) {
return count;
}
o = o.previous;
count--;
}
return -1;
}
public ArrayNode<T> find(T data) {
if (_close) {
return null;
}
ArrayNode<T> o = this._items.next;
for (; o != this._items && !data.equals(o.data);) {
o = o.next;
}
if (o == this._items) {
return null;
}
return o;
}
public boolean remove(int idx) {
if (_close) {
return false;
}
int size = _length - 1;
if (0 <= idx && idx <= size) {
ArrayNode<T> o = this._items.next;
int count = 0;
for (; count < idx;) {
o = o.next;
count++;
}
return remove(o.data);
} else if (idx == size) {
return remove(_items.data);
}
return false;
}
public boolean remove(T data) {
if (_close) {
return false;
}
ArrayNode<T> toDelete = this.find(data);
if (toDelete != this._items && toDelete != null) {
toDelete.previous.next = toDelete.next;
toDelete.next.previous = toDelete.previous;
_length--;
return true;
}
return false;
}
public T pop() {
T o = null;
if (!isEmpty()) {
o = this._items.previous.data;
remove(o);
}
return o;
}
public boolean isFirst(Array<T> o) {
if (o._items.previous == this._items) {
return true;
}
return false;
}
public boolean isLast(Array<T> o) {
if (o._items.next == this._items) {
return true;
}
return false;
}
public T random() {
if (_length == 0) {
return null;
}
return get(MathUtils.random(0, _length - 1));
}
@Override
public String toString() {
return toString(',');
}
public T next() {
if (isEmpty()) {
return null;
}
if (_next_count == 0) {
_next_tmp = this._items.next;
_next_count++;
return _next_tmp.data;
}
if (_next_tmp != this._items && _next_count < _length) {
_next_tmp = _next_tmp.next;
_next_count++;
return _next_tmp.data;
} else {
stopNext();
return null;
}
}
public int idxNext() {
return _next_count;
}
public void stopNext() {
_next_tmp = null;
_next_count = 0;
}
public T previous() {
if (isEmpty()) {
return null;
}
if (_previous_count == 0) {
_previous_tmp = this._items.previous;
_previous_count++;
return _previous_tmp.data;
}
if (_previous_tmp != this._items && _previous_count < _length) {
_previous_tmp = _previous_tmp.previous;
_previous_count++;
return _previous_tmp.data;
} else {
stopPrevious();
return null;
}
}
public int idxPrevious() {
return _previous_count;
}
public void stopPrevious() {
_previous_tmp = null;
_previous_count = 0;
}
public String toString(char split) {
if (isEmpty()) {
return "[]";
}
ArrayNode<T> o = this._items.next;
StringBuilder buffer = new StringBuilder(
CollectionUtils.INITIAL_CAPACITY);
buffer.append('[');
int count = 0;
for (; o != this._items;) {
buffer.append(o.data);
if (count != _length - 1) {
buffer.append(split);
}
o = o.next;
count++;
}
buffer.append(']');
return buffer.toString();
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof Array)) {
return false;
}
Array<?> array = (Array<?>) o;
int n = _length;
if (n != array._length) {
return false;
}
ArrayNode<?> items1 = this._items;
ArrayNode<?> items2 = array._items;
for (int i = 0; i < n; i++) {
Object o1 = items1.next;
Object o2 = items2.next;
if (!(o1 == null ? o2 == null : o1.equals(o2))) {
return false;
}
}
return true;
}
public T first() {
if (this.isEmpty()) {
return null;
} else {
return this._items.next.data;
}
}
public T last() {
if (this.isEmpty()) {
return null;
} else {
return this._items.previous.data;
}
}
public void clear() {
this._close = false;
this._length = 0;
this.stopNext();
this.stopPrevious();
this._items = null;
this._items = new ArrayNode<T>();
this._items.next = this._items;
this._items.previous = this._items;
}
public int size() {
return _length;
}
public boolean isEmpty() {
return _close || _length == 0 || this._items.next == this._items;
}
public boolean isClose() {
return _close;
}
public Array<T> copy() {
Array<T> newlist = new Array<T>();
newlist._items.next = this._items;
newlist._items.previous = this._items;
return newlist;
}
@Override
public void dispose() {
_close = true;
_length = 0;
_items = null;
}
}