/**
* Adds the value to the collection given by map.get(key). A new collection is created using the
* supplied CollectionFactory.
*/
public static <K, V, C extends Collection<V>> void putIntoValueCollection(
Map<K, C> map, K key, V value, CollectionFactory<V> cf) {
C c = map.get(key);
if (c == null) {
c = ErasureUtils.<C>uncheckedCast(cf.newCollection());
map.put(key, c);
}
c.add(value);
}
/**
* Reduces memory consumption to the minimum for representing the values currently stored stored
* in this object.
*/
public void compact() {
if (keys.length > size) {
Class[] newKeys = new Class[size];
Object[] newValues = new Object[size];
System.arraycopy(keys, 0, newKeys, 0, size);
System.arraycopy(values, 0, newValues, 0, size);
keys = ErasureUtils.uncheckedCast(newKeys);
values = newValues;
}
}
public void setCapacity(int newSize) {
if (size > newSize) {
throw new RuntimeException("You cannot set capacity to smaller than the current size.");
}
Class[] newKeys = new Class[newSize];
Object[] newValues = new Object[newSize];
System.arraycopy(keys, 0, newKeys, 0, size);
System.arraycopy(values, 0, newValues, 0, size);
keys = ErasureUtils.uncheckedCast(newKeys);
values = newValues;
}
/**
* Initializes this ArrayCoreMap, pre-allocating arrays to hold up to capacity key,value pairs.
* This array will grow if necessary.
*
* @param capacity Initial capacity of object in key,value pairs
*/
public ArrayCoreMap(int capacity) {
keys = ErasureUtils.uncheckedCast(new Class[capacity]);
values = new Object[capacity];
// size starts at 0
}