org.hsqldb.lib.OrderedIntHashSet Maven / Gradle / Ivy
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package org.hsqldb.lib;
/**
* A list which is also a set of int primitives which maintains the insertion
* order of the elements and allows access by index. Iterators return the keys
* in the index order.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.6.0
* @since 1.9.0
*/
public class OrderedIntHashSet extends IntHashSet {
public OrderedIntHashSet() {
this(8);
}
public OrderedIntHashSet(int initialCapacity) throws IllegalArgumentException {
super(initialCapacity);
isList = true;
}
public OrderedIntHashSet(int[] elements) {
super(elements.length);
isList = true;
addAll(elements);
}
public OrderedIntHashSet(int[] elementsA, int[] elementsB) {
super(elementsA.length + elementsB.length);
isList = true;
addAll(elementsA);
addAll(elementsB);
}
public boolean insert(int index,
int key) throws IndexOutOfBoundsException {
if (index < 0 || index > size()) {
throw new IndexOutOfBoundsException();
}
if (contains(key)) {
return false;
}
if (index < size()) {
super.insertRow(index);
}
return add(key);
}
public boolean remove(int key) {
return (Boolean) super.remove(key, 0, null, null, false, true);
}
public void removeEntry(int index) throws IndexOutOfBoundsException {
checkRange(index);
int key = intKeyTable[index];
super.remove(key, 0, null, null, false, true);
}
public int get(int index) {
checkRange(index);
return intKeyTable[index];
}
public int getIndex(int value) {
return getLookup(value);
}
public int getOrderedStartMatchCount(int[] array) {
int i = 0;
for (; i < array.length; i++) {
if (i >= size() || get(i) != array[i]) {
break;
}
}
return i;
}
public boolean addAll(OrderedIntHashSet set) {
int oldSize = size();
int setSize = set.size();
for (int i = 0; i < setSize; i++) {
int value = set.get(i);
add(value);
}
return oldSize != size();
}
private void checkRange(int i) {
if (i < 0 || i >= size()) {
throw new IndexOutOfBoundsException();
}
}
}