public void clear() {
reset();
list.clear();
size = 0;
}
public boolean addRow(Row row) {
list.add(row);
size++;
return true;
}
public void remove() {
// avoid consecutive removes without next()
if (previous == null) {
throw new NoSuchElementException();
}
if (currentPos < size && currentPos != -1) {
list.removeAfter(previous);
current = previous;
size--;
currentPos--;
return;
}
throw new NoSuchElementException();
}
public RowSetNavigatorLinkedList() {
list = new HsqlLinkedList();
root = list.getHeadNode();
current = root;
}
/** Runs a test on the hsqldb lists */
public void testLists() {
HsqlArrayList arrayList = new HsqlArrayList();
HsqlLinkedList linkedList = new HsqlLinkedList();
Vector vector = new Vector();
Vector listCommandsCalled = new Vector(NUMBER_OF_ITERATIONS_PER_RUN);
Integer tempInt = null;
int tempCommandCode;
int tempPosition;
boolean arrayListException = false;
boolean linkedListException = false;
boolean vectorException = false;
Object arrayListObject = null;
Object linkedListObject = null;
Object vectorObject = null;
for (int i = 0; i < getRandomInt(3, 12); i++) { // prime the contents with a couple items
tempInt = getRandomInteger();
arrayList.add(tempInt);
linkedList.add(tempInt);
vector.addElement(tempInt);
listCommandsCalled.addElement("Add");
}
compareLists(arrayList, linkedList, vector);
for (int j = 0; j < NUMBER_OF_ITERATIONS_PER_RUN; j++) {
tempCommandCode = getRandomInt(0, 15); // 0 and 8 are ignored or used for a special op
switch (tempCommandCode) {
case ADD:
tempInt = getRandomInteger();
listCommandsCalled.addElement("Add");
arrayList.add(tempInt);
linkedList.add(tempInt);
vector.addElement(tempInt);
break;
case ADD_AT:
tempInt = getRandomInteger();
tempPosition = getRandomInt(0, vector.size());
listCommandsCalled.addElement("Add at " + tempPosition);
try {
arrayList.add(tempPosition, tempInt);
} catch (Exception ex) {
arrayListException = true;
}
try {
linkedList.add(tempPosition, tempInt);
} catch (Exception ex) {
linkedListException = true;
}
try {
vector.insertElementAt(tempInt, tempPosition);
} catch (Exception ex) {
vectorException = true;
}
break;
case GET:
tempPosition = getRandomInt(0, vector.size() - 1);
listCommandsCalled.addElement("Get " + tempPosition);
try {
arrayListObject = arrayList.get(tempPosition);
} catch (Exception ex) {
arrayListException = true;
}
try {
linkedListObject = linkedList.get(tempPosition);
} catch (Exception ex) {
linkedListException = true;
}
try {
vectorObject = vector.elementAt(tempPosition);
} catch (Exception ex) {
vectorException = true;
}
break;
case REMOVE:
tempPosition = getRandomInt(0, vector.size() - 1);
listCommandsCalled.addElement("Remove " + tempPosition);
try {
arrayListObject = arrayList.remove(tempPosition);
} catch (Exception ex) {
arrayListException = true;
}
try {
linkedListObject = linkedList.remove(tempPosition);
} catch (Exception ex) {
linkedListException = true;
}
try {
vectorObject = vector.elementAt(tempPosition);
vector.removeElementAt(tempPosition);
} catch (Exception ex) {
vectorException = true;
}
break;
case SET:
tempInt = getRandomInteger();
tempPosition = getRandomInt(0, vector.size() - 1);
listCommandsCalled.addElement("Set " + tempPosition);
try {
arrayList.set(tempPosition, tempInt);
} catch (Exception ex) {
arrayListException = true;
}
try {
linkedList.set(tempPosition, tempInt);
} catch (Exception ex) {
linkedListException = true;
}
try {
vector.setElementAt(tempInt, tempPosition);
} catch (Exception ex) {
vectorException = true;
}
break;
case OPTIMIZE:
listCommandsCalled.addElement("Optimize");
arrayList.trim();
vector.trimToSize();
break;
case REMOVE_ALL:
if (getRandomInt(0, 5) == 4) { // to limit the frequency of this call
listCommandsCalled.addElement("Remove all");
if (vector.size() == 0) {
break;
}
for (int k = arrayList.size() - 1; k >= 0; k--) {
arrayList.remove(k);
linkedList.remove(k);
}
vector.removeAllElements();
}
break;
default:
}
if (arrayListException || linkedListException || vectorException) {
// if an exception is thrown in vector but not one of the lists or vice versa
if (!(arrayListException && linkedListException && vectorException)) {
if (!(arrayListException && vectorException)) {
System.out.println("Exception descrepancy with vector and arraylist");
} else if (!(linkedListException && vectorException)) {
System.out.println("Exception descrepancy with vector and linkedlist");
} else {
System.out.println("Error in TestDataStructures");
}
this.printListCommandsCalled(listCommandsCalled);
fail("test failed");
// System.exit(0);
}
return;
}
if (!objectEquals(linkedListObject, arrayListObject, vectorObject)) {
System.out.println("Objects returned inconsistent");
this.printListCommandsCalled(listCommandsCalled);
fail("test failed");
// System.exit(0);
}
compareLists(arrayList, linkedList, vector);
}
}