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Only the Java Core part of Javolution library, with slight modifications for use in MSFTBX.
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/*
* Javolution - Java(TM) Solution for Real-Time and Embedded Systems
* Copyright (C) 2012 - Javolution (http://javolution.org/)
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software is
* freely granted, provided that this notice is preserved.
*/
package javolution.util.internal.table;
import java.util.Iterator;
import java.util.NoSuchElementException;
import javolution.util.function.Equality;
/**
* The default {@link javolution.util.FastTable FastTable} implementation
* based on {@link FractalTableImpl fractal tables}. The memory footprint
* is minimal when the table is cleared.
*/
public class FastTableImpl extends TableView {
/** Internal iterator faster than generic TableIteratorImpl. */
private class IteratorImpl implements Iterator {
private int currentIndex = -1;
private int nextIndex;
@Override
public boolean hasNext() {
return nextIndex < size;
}
@Override
@SuppressWarnings("unchecked")
public E next() {
if (nextIndex >= size) throw new NoSuchElementException();
currentIndex = nextIndex++;
return (E) fractal.get(currentIndex);
}
@Override
public void remove() {
if (currentIndex < 0) throw new IllegalStateException();
FastTableImpl.this.remove(currentIndex);
nextIndex--;
currentIndex = -1;
}
}
private static final long serialVersionUID = 0x600L; // Version.
private transient int capacity; // Actual memory allocated is usually far less than capacity since inner fractal tables can be null.
private final Equality super E> comparator;
private transient FractalTableImpl fractal; // Null if empty (capacity 0)
private transient int size;
public FastTableImpl(Equality super E> comparator) {
super(null); // Root class.
this.comparator = comparator;
}
@Override
public boolean add(E element) {
addLast(element);
return true;
}
@Override
public void add(int index, E element) {
if ((index < 0) || (index > size)) indexError(index);
checkUpsize();
if (index >= (size >> 1)) {
fractal.shiftRight(element, index, size - index);
} else {
fractal.shiftLeft(element, index - 1, index);
fractal.offset--;
}
size++;
}
@Override
public void addFirst(E element) {
checkUpsize();
fractal.offset--;
fractal.set(0, element);
size++;
}
@Override
public void addLast(E element) {
checkUpsize();
fractal.set(size++, element);
}
@Override
public void clear() {
fractal = null;
capacity = 0;
size = 0;
}
@Override
public FastTableImpl clone() { // Make a copy.
FastTableImpl copy = new FastTableImpl(comparator());
copy.addAll(this);
return copy;
}
@Override
public Equality super E> comparator() {
return comparator;
}
@SuppressWarnings("unchecked")
@Override
public E get(int index) {
if ((index < 0) && (index >= size)) indexError(index);
return (E) fractal.get(index);
}
@Override
public E getFirst() {
if (size == 0) emptyError();
return get(0);
}
@Override
public E getLast() {
if (size == 0) emptyError();
return get(size - 1);
}
@Override
public Iterator iterator() {
return new IteratorImpl();
}
@SuppressWarnings("unchecked")
@Override
public E remove(int index) {
if ((index < 0) || (index >= size)) indexError(index);
E removed = (E) fractal.get(index);
if (index >= (size >> 1)) {
fractal.shiftLeft(null, size - 1, size - index - 1);
} else {
fractal.shiftRight(null, 0, index);
fractal.offset++;
}
size--;
return removed;
}
@SuppressWarnings("unchecked")
@Override
public E removeFirst() {
if (size == 0) emptyError();
E first = (E) fractal.set(0, null);
fractal.offset++;
size--;
return first;
}
@SuppressWarnings("unchecked")
@Override
public E removeLast() {
if (size == 0) emptyError();
E last = (E) fractal.set(--size, null);
return last;
}
@SuppressWarnings("unchecked")
@Override
public E set(int index, E element) {
if ((index < 0) && (index >= size)) indexError(index);
return (E) fractal.set(index, element);
}
@Override
public int size() {
return size;
}
private void checkUpsize() {
if (size >= capacity) upsize();
}
/** For serialization support */
@SuppressWarnings("unchecked")
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
s.defaultReadObject(); // Deserialize comparator.
int n = s.readInt();
for (int i = 0; i < n; i++)
addLast((E) s.readObject());
}
private void upsize() {
fractal = (fractal == null) ? new FractalTableImpl() : fractal.upsize();
capacity = fractal.capacity();
}
/** For serialization support */
private void writeObject(java.io.ObjectOutputStream s)
throws java.io.IOException {
s.defaultWriteObject(); // Serialize comparator.
s.writeInt(size);
for (int i = 0; i < size; i++)
s.writeObject(fractal.get(i));
}
}