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/*
* Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.javafx.collections;
import java.util.Arrays;
import javafx.collections.ObservableArrayBase;
import javafx.collections.ObservableIntegerArray;
/**
* ObservableIntegerArray default implementation.
*/
public class ObservableIntegerArrayImpl extends ObservableArrayBase implements ObservableIntegerArray {
private static final int[] INITIAL = new int[0];
private int[] array = INITIAL;
private int size = 0;
/**
* Creates empty observable integer array
*/
public ObservableIntegerArrayImpl() {
}
/**
* Creates observable integer array with copy of given initial values
* @param elements initial values to copy to observable integer array
*/
public ObservableIntegerArrayImpl(int... elements) {
setAll(elements);
}
/**
* Creates observable integer array with copy of given observable integer array
* @param src observable integer array to copy
*/
public ObservableIntegerArrayImpl(ObservableIntegerArray src) {
setAll(src);
}
@Override
public void clear() {
resize(0);
}
@Override
public int size() {
return size;
}
private void addAllInternal(ObservableIntegerArray src, int srcIndex, int length) {
growCapacity(length);
src.copyTo(srcIndex, array, size, length);
size += length;
fireChange(length != 0, size - length, size);
}
private void addAllInternal(int[] src, int srcIndex, int length) {
growCapacity(length);
System.arraycopy(src, srcIndex, array, size, length);
size += length;
fireChange(length != 0, size - length, size);
}
@Override
public void addAll(ObservableIntegerArray src) {
addAllInternal(src, 0, src.size());
}
@Override
public void addAll(int... elements) {
addAllInternal(elements, 0, elements.length);
}
@Override
public void addAll(ObservableIntegerArray src, int srcIndex, int length) {
rangeCheck(src, srcIndex, length);
addAllInternal(src, srcIndex, length);
}
@Override
public void addAll(int[] src, int srcIndex, int length) {
rangeCheck(src, srcIndex, length);
addAllInternal(src, srcIndex, length);
}
private void setAllInternal(ObservableIntegerArray src, int srcIndex, int length) {
boolean sizeChanged = size() != length;
if (src == this) {
if (srcIndex == 0) {
resize(length);
} else {
System.arraycopy(array, srcIndex, array, 0, length);
size = length;
fireChange(sizeChanged, 0, size);
}
} else {
size = 0;
ensureCapacity(length);
src.copyTo(srcIndex, array, 0, length);
size = length;
fireChange(sizeChanged, 0, size);
}
}
private void setAllInternal(int[] src, int srcIndex, int length) {
boolean sizeChanged = size() != length;
size = 0;
ensureCapacity(length);
System.arraycopy(src, srcIndex, array, 0, length);
size = length;
fireChange(sizeChanged, 0, size);
}
@Override
public void setAll(ObservableIntegerArray src) {
setAllInternal(src, 0, src.size());
}
@Override
public void setAll(ObservableIntegerArray src, int srcIndex, int length) {
rangeCheck(src, srcIndex, length);
setAllInternal(src, srcIndex, length);
}
@Override
public void setAll(int[] src, int srcIndex, int length) {
rangeCheck(src, srcIndex, length);
setAllInternal(src, srcIndex, length);
}
@Override
public void setAll(int[] src) {
setAllInternal(src, 0, src.length);
}
@Override
public void set(int destIndex, int[] src, int srcIndex, int length) {
rangeCheck(destIndex + length);
System.arraycopy(src, srcIndex, array, destIndex, length);
fireChange(false, destIndex, destIndex + length);
}
@Override
public void set(int destIndex, ObservableIntegerArray src, int srcIndex, int length) {
rangeCheck(destIndex + length);
src.copyTo(srcIndex, array, destIndex, length);
fireChange(false, destIndex, destIndex + length);
}
@Override
public int[] toArray(int[] dest) {
if ((dest == null) || (size() > dest.length)) {
dest = new int[size()];
}
System.arraycopy(array, 0, dest, 0, size());
return dest;
}
@Override
public int get(int index) {
rangeCheck(index + 1);
return array[index];
}
@Override
public void set(int index, int value) {
rangeCheck(index + 1);
array[index] = value;
fireChange(false, index, index + 1);
}
@Override
public int[] toArray(int index, int[] dest, int length) {
rangeCheck(index + length);
if ((dest == null) || (length > dest.length)) {
dest = new int[length];
}
System.arraycopy(array, index, dest, 0, length);
return dest;
}
@Override
public void copyTo(int srcIndex, int[] dest, int destIndex, int length) {
rangeCheck(srcIndex + length);
System.arraycopy(array, srcIndex, dest, destIndex, length);
}
@Override
public void copyTo(int srcIndex, ObservableIntegerArray dest, int destIndex, int length) {
rangeCheck(srcIndex + length);
dest.set(destIndex, array, srcIndex, length);
}
@Override
public void resize(int newSize) {
if (newSize < 0) {
throw new NegativeArraySizeException("Can't resize to negative value: " + newSize);
}
ensureCapacity(newSize);
int minSize = Math.min(size, newSize);
boolean sizeChanged = size != newSize;
size = newSize;
Arrays.fill(array, minSize, size, 0);
fireChange(sizeChanged, minSize, newSize);
}
/**
* The maximum size of array to allocate.
* Some VMs reserve some header words in an array.
* Attempts to allocate larger arrays may result in
* OutOfMemoryError: Requested array size exceeds VM limit
*/
private static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8;
private void growCapacity(int length) {
int minCapacity = size + length;
int oldCapacity = array.length;
if (minCapacity > array.length) {
int newCapacity = oldCapacity + (oldCapacity >> 1);
if (newCapacity < minCapacity) newCapacity = minCapacity;
if (newCapacity > MAX_ARRAY_SIZE) newCapacity = hugeCapacity(minCapacity);
ensureCapacity(newCapacity);
} else if (length > 0 && minCapacity < 0) {
throw new OutOfMemoryError(); // overflow
}
}
@Override
public void ensureCapacity(int capacity) {
if (array.length < capacity) {
array = Arrays.copyOf(array, capacity);
}
}
private static int hugeCapacity(int minCapacity) {
if (minCapacity < 0) // overflow
throw new OutOfMemoryError();
return (minCapacity > MAX_ARRAY_SIZE) ?
Integer.MAX_VALUE :
MAX_ARRAY_SIZE;
}
@Override
public void trimToSize() {
if (array.length != size) {
int[] newArray = new int[size];
System.arraycopy(array, 0, newArray, 0, size);
array = newArray;
}
}
private void rangeCheck(int size) {
if (size > this.size) throw new ArrayIndexOutOfBoundsException(this.size);
}
private void rangeCheck(ObservableIntegerArray src, int srcIndex, int length) {
if (src == null) throw new NullPointerException();
if (srcIndex < 0 || srcIndex + length > src.size()) {
throw new ArrayIndexOutOfBoundsException(src.size());
}
if (length < 0) throw new ArrayIndexOutOfBoundsException(-1);
}
private void rangeCheck(int[] src, int srcIndex, int length) {
if (src == null) throw new NullPointerException();
if (srcIndex < 0 || srcIndex + length > src.length) {
throw new ArrayIndexOutOfBoundsException(src.length);
}
if (length < 0) throw new ArrayIndexOutOfBoundsException(-1);
}
@Override
public String toString() {
if (array == null)
return "null";
int iMax = size() - 1;
if (iMax == -1)
return "[]";
StringBuilder b = new StringBuilder();
b.append('[');
for (int i = 0; ; i++) {
b.append(array[i]);
if (i == iMax)
return b.append(']').toString();
b.append(", ");
}
}
}
