/**
* Compares 2 Objects. Both must be of the same type or mutually comparable.
*
* <p>If they are Comparable - calling compareTo method of <code>val1</code> on <code>val2</code>
* If not: constructing 2 strings from val1 and val2 and calling compareTo method of String.
*
* @param val1 first object to be compared.
* @param val2 second object to be compared.
* @return If the objects are compared as Strings - the returned value is the same as String's
* compareTo(Object) would return. else: 1 if val1 is greater than val2. -1 if val1 is smaller
* than vla2. 0 if they are equal.
*/
public int compareObjects(Object val1, Object val2) {
// if they are comparable using the compareTo method
if (val1 instanceof Comparable) {
return ((Comparable) val1).compareTo(val2);
}
if (val1 instanceof Boolean) {
return SparseBooleanColumn.compareBooleans(
((Boolean) val1).booleanValue(), ((Boolean) val2).booleanValue());
}
String str1, str2;
if (val1 instanceof byte[]) {
str1 = new String((byte[]) val1);
str2 = new String((byte[]) val2);
} else if (val1 instanceof char[]) {
str1 = new String((char[]) val1);
str2 = new String((char[]) val2);
} else {
str1 = val1.toString();
str2 = val2.toString();
}
// converting to strings and comparing
return str1.compareTo(str2);
}
/**
* Returns the item at pos as a boolean. If the item is a Boolean, return its boolean value,
* otherwise construct a new Boolean by calling the toString() method on the item and return its
* boolean value.
*
* @param row the row number
* @return the item as pos as a boolean value. If no such item exists returns false.
*/
public boolean getBoolean(int row) {
Object obj = elements.get(row);
if (obj != null) {
return SparseBooleanColumn.toBoolean(obj);
}
return SparseDefaultValues.getDefaultBoolean();
}