/**
* Tests if some key maps into the specified value in this hashtable. This operation is more
* expensive than the <code>containsKey</code> method.
*
* <p>Note that this method is identical in functionality to containsValue, (which is part of the
* Map interface in the collections framework).
*
* @param value a value to search for.
* @return <code>true</code> if and only if some key maps to the <code>value</code> argument in
* this hashtable as determined by the <tt>equals</tt> method; <code>false</code> otherwise.
* @throws NullPointerException if the value is <code>null</code>.
* @see #containsKey(int)
* @see #containsValue(Object)
* @see java.util.Map
*/
public boolean contains(Object value) {
if (value == null) {
I18nManager intl_mgr = I18nManager.getManager();
String msg = intl_mgr.getString(NO_VALUE_ERR_PROP);
throw new NullPointerException(msg);
}
Entry[] tab = table;
for (int i = tab.length; i-- > 0; ) {
for (Entry e = tab[i]; e != null; e = e.next) {
if (e.value.equals(value)) return true;
}
}
return false;
}
