/**
* 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 java.math.BigInteger;
import java.util.Arrays;
import loon.utils.CollectionUtils;
import loon.utils.MathUtils;
public class IntArray {
public int[] items;
public int length;
public boolean ordered;
public IntArray() {
this(true, 16);
}
public IntArray(int capacity) {
this(true, capacity);
}
public IntArray(boolean ordered, int capacity) {
this.ordered = ordered;
items = new int[capacity];
}
public IntArray(IntArray array) {
this.ordered = array.ordered;
length = array.length;
items = new int[length];
System.arraycopy(array.items, 0, items, 0, length);
}
public IntArray(int[] array) {
this(true, array, 0, array.length);
}
public IntArray(boolean ordered, int[] array, int startIndex, int count) {
this(ordered, count);
length = count;
System.arraycopy(array, startIndex, items, 0, count);
}
public void unshift(int value) {
if (length > 0) {
int[] items = this.items;
int[] newItems = new int[length + 1];
newItems[0] = value;
System.arraycopy(items, 0, newItems, 1, length);
this.length = newItems.length;
this.items = newItems;
} else {
add(value);
}
}
public void push(int value) {
add(value);
}
public void add(int value) {
int[] items = this.items;
if (length == items.length) {
items = relength(Math.max(8, (int) (length * 1.75f)));
}
items[length++] = value;
}
public void addAll(IntArray array) {
addAll(array, 0, array.length);
}
public void addAll(IntArray array, int offset, int length) {
if (offset + length > array.length)
throw new IllegalArgumentException(
"offset + length must be <= length: " + offset + " + "
+ length + " <= " + array.length);
addAll(array.items, offset, length);
}
public void addAll(int... array) {
addAll(array, 0, array.length);
}
public void addAll(int[] array, int offset, int length) {
int[] items = this.items;
int lengthNeeded = length + length;
if (lengthNeeded > items.length) {
items = relength(Math.max(8, (int) (lengthNeeded * 1.75f)));
}
System.arraycopy(array, offset, items, length, length);
length += length;
}
public int get(int index) {
if (index >= length) {
return 0;
}
return items[index];
}
public void set(int index, int value) {
if (index >= length) {
int size = length;
for (int i = size; i < index + 1; i++) {
add(0);
}
items[index] = value;
return;
}
items[index] = value;
}
public void incr(int index, int value) {
if (index >= length)
throw new IndexOutOfBoundsException("index can't be >= length: "
+ index + " >= " + length);
items[index] += value;
}
public void mul(int index, int value) {
if (index >= length)
throw new IndexOutOfBoundsException("index can't be >= length: "
+ index + " >= " + length);
items[index] *= value;
}
public void insert(int index, int value) {
if (index > length) {
throw new IndexOutOfBoundsException("index can't be > length: "
+ index + " > " + length);
}
int[] items = this.items;
if (length == items.length)
items = relength(Math.max(8, (int) (length * 1.75f)));
if (ordered)
System.arraycopy(items, index, items, index + 1, length - index);
else
items[length] = items[index];
length++;
items[index] = value;
}
public void swap(int first, int second) {
if (first >= length)
throw new IndexOutOfBoundsException("first can't be >= length: "
+ first + " >= " + length);
if (second >= length)
throw new IndexOutOfBoundsException("second can't be >= length: "
+ second + " >= " + length);
int[] items = this.items;
int firstValue = items[first];
items[first] = items[second];
items[second] = firstValue;
}
public boolean contains(int value) {
int i = length - 1;
int[] items = this.items;
while (i >= 0)
if (items[i--] == value)
return true;
return false;
}
public int indexOf(int value) {
int[] items = this.items;
for (int i = 0, n = length; i < n; i++)
if (items[i] == value)
return i;
return -1;
}
public int lastIndexOf(int value) {
int[] items = this.items;
for (int i = length - 1; i >= 0; i--)
if (items[i] == value)
return i;
return -1;
}
public boolean removeValue(int value) {
int[] items = this.items;
for (int i = 0, n = length; i < n; i++) {
if (items[i] == value) {
removeIndex(i);
return true;
}
}
return false;
}
public int removeIndex(int index) {
if (index >= length) {
throw new IndexOutOfBoundsException("index can't be >= length: "
+ index + " >= " + length);
}
int[] items = this.items;
int value = items[index];
length--;
if (ordered) {
System.arraycopy(items, index + 1, items, index, length - index);
} else {
items[index] = items[length];
}
return value;
}
public void removeRange(int start, int end) {
if (end >= length) {
throw new IndexOutOfBoundsException("end can't be >= length: "
+ end + " >= " + length);
}
if (start > end) {
throw new IndexOutOfBoundsException("start can't be > end: "
+ start + " > " + end);
}
int[] items = this.items;
int count = end - start + 1;
if (ordered) {
System.arraycopy(items, start + count, items, start, length
- (start + count));
} else {
int lastIndex = this.length - 1;
for (int i = 0; i < count; i++)
items[start + i] = items[lastIndex - i];
}
length -= count;
}
public boolean removeAll(IntArray array) {
int length = this.length;
int startlength = length;
int[] items = this.items;
for (int i = 0, n = array.length; i < n; i++) {
int item = array.get(i);
for (int ii = 0; ii < length; ii++) {
if (item == items[ii]) {
removeIndex(ii);
length--;
break;
}
}
}
return length != startlength;
}
public int pop() {
return items[--length];
}
public int shift() {
return removeIndex(0);
}
public int peek() {
return items[length - 1];
}
public int first() {
if (length == 0) {
throw new IllegalStateException("Array is empty.");
}
return items[0];
}
public void clear() {
length = 0;
}
public int[] shrink() {
if (items.length != length)
relength(length);
return items;
}
public int[] ensureCapacity(int additionalCapacity) {
int lengthNeeded = length + additionalCapacity;
if (lengthNeeded > items.length)
relength(Math.max(8, lengthNeeded));
return items;
}
protected int[] relength(int newlength) {
int[] newItems = new int[newlength];
int[] items = this.items;
System.arraycopy(items, 0, newItems, 0,
Math.min(length, newItems.length));
this.items = newItems;
return newItems;
}
public void sort() {
Arrays.sort(items, 0, length);
}
public void reverse() {
int[] items = this.items;
for (int i = 0, lastIndex = length - 1, n = length / 2; i < n; i++) {
int ii = lastIndex - i;
int temp = items[i];
items[i] = items[ii];
items[ii] = temp;
}
}
public void shuffle() {
int[] items = this.items;
for (int i = length - 1; i >= 0; i--) {
int ii = MathUtils.random(i);
int temp = items[i];
items[i] = items[ii];
items[ii] = temp;
}
}
public void truncate(int newlength) {
if (length > newlength)
length = newlength;
}
public int random() {
if (length == 0) {
return 0;
}
return items[MathUtils.random(0, length - 1)];
}
public int[] toArray() {
int[] array = new int[length];
System.arraycopy(items, 0, array, 0, length);
return array;
}
public boolean equals(Object object) {
if (object == this)
return true;
if (!(object instanceof IntArray))
return false;
IntArray array = (IntArray) object;
int n = length;
if (n != array.length)
return false;
for (int i = 0; i < n; i++)
if (items[i] != array.items[i])
return false;
return true;
}
public String toString(String separator) {
if (length == 0)
return "";
int[] items = this.items;
StringBuilder buffer = new StringBuilder(32);
buffer.append(items[0]);
for (int i = 1; i < length; i++) {
buffer.append(separator);
buffer.append(items[i]);
}
return buffer.toString();
}
static public IntArray with(int... array) {
return new IntArray(array);
}
public IntArray splice(int begin, int end) {
IntArray longs = new IntArray(slice(begin, end));
if (end - begin >= length) {
items = new int[0];
length = 0;
return longs;
} else {
removeRange(begin, end - 1);
}
return longs;
}
public static int[] slice(int[] array, int begin, int end) {
if (begin > end) {
throw new RuntimeException();
}
if (begin < 0) {
begin = array.length + begin;
}
if (end < 0) {
end = array.length + end;
}
int elements = end - begin;
int[] ret = new int[elements];
System.arraycopy(array, begin, ret, 0, elements);
return ret;
}
public static int[] slice(int[] array, int begin) {
return slice(array, begin, array.length);
}
public IntArray slice(int size) {
return new IntArray(slice(this.items, size, this.length));
}
public IntArray slice(int begin, int end) {
return new IntArray(slice(this.items, begin, end));
}
public static int[] concat(int[] array, int[] other) {
return concat(array, array.length, other, other.length);
}
public static int[] concat(int[] array, int alen, int[] other, int blen) {
int[] ret = new int[alen + blen];
System.arraycopy(array, 0, ret, 0, alen);
System.arraycopy(other, 0, ret, alen, blen);
return ret;
}
public IntArray concat(IntArray o) {
return new IntArray(concat(this.items, this.length, o.items, o.length));
}
public byte[] getBytes() {
int[] items = this.items;
byte[] bytes = new byte[this.length];
for (int i = 0; i < bytes.length; i++) {
bytes[i] = BigInteger.valueOf(items[i]).byteValue();
}
return bytes;
}
public String toString(char split) {
if (length == 0) {
return "[]";
}
int[] items = this.items;
StringBuilder buffer = new StringBuilder(
CollectionUtils.INITIAL_CAPACITY);
buffer.append('[');
buffer.append(items[0]);
for (int i = 1; i < length; i++) {
buffer.append(split);
buffer.append(items[i]);
}
buffer.append(']');
return buffer.toString();
}
@Override
public String toString() {
return toString(',');
}
}