/**
* Returns the keys for the values in the collection
*
* @return The keys (never null)
* @author Klaus Meffert
* @since 2.3
*/
public List getKeys() {
final List result = new java.util.ArrayList();
final Iterator iterator = m_data.iterator();
while (iterator.hasNext()) {
final KeyedValue kv = (KeyedValue) iterator.next();
result.add(kv.getKey());
}
return result;
}
/**
* @param a_key the key to search for
* @return index for a given key or -1 if the key is not found
* @author Klaus Meffert
* @since 2.3
*/
public int getIndex(final Comparable a_key) {
int i = 0;
final Iterator iterator = m_data.iterator();
while (iterator.hasNext()) {
final KeyedValue kv = (KeyedValue) iterator.next();
if (kv.getKey() != null) {
if (kv.getKey().equals(a_key)) {
return i;
}
} else {
if (a_key == null) {
return i;
}
}
i++;
}
// key not found
return -1;
}
/**
* @param a_index the item index to retrieve the key for, starting at 0
* @return the row key for item at given index
* @author Klaus Meffert
* @since 2.3
*/
public Comparable getKey(final int a_index) {
Comparable result;
final KeyedValue item = (KeyedValue) m_data.get(a_index);
if (item != null) {
result = item.getKey();
} else {
result = null;
}
return result;
}