| package edu.uci.ics.asterix.om.base; |
| |
| import java.util.ArrayList; |
| |
| public class ACollectionCursor implements IACursor { |
| |
| private ArrayList<IAObject> values; |
| private int pos; |
| private int size; |
| private IAObject object = null; |
| |
| public ACollectionCursor() { |
| } |
| |
| public ACollectionCursor(AUnorderedList bag) { |
| reset(bag); |
| } |
| |
| public ACollectionCursor(AOrderedList list) { |
| reset(list); |
| } |
| |
| @Override |
| public boolean next() { |
| pos++; |
| if (pos < size) { |
| object = values.get(pos); |
| return true; |
| } else { |
| object = null; |
| return false; |
| } |
| } |
| |
| @Override |
| public IAObject get() { // returns the current object |
| return object; |
| } |
| |
| @Override |
| public void reset() { |
| pos = -1; |
| size = values.size(); |
| } |
| |
| public void reset(AUnorderedList bag) { |
| this.values = bag.values; |
| reset(); |
| } |
| |
| public void reset(AOrderedList list) { |
| this.values = list.values; |
| reset(); |
| } |
| |
| } |