1 package autotest.common.table; 2 3 import com.google.gwt.json.client.JSONObject; 4 5 import java.util.AbstractSet; 6 import java.util.Collection; 7 import java.util.HashMap; 8 import java.util.Iterator; 9 import java.util.Map; 10 11 /** 12 * Set that hashes JSONObjects by their ID, so that identical objects get 13 * matched together. 14 */ 15 public class JSONObjectSet<T extends JSONObject> extends AbstractSet<T> { 16 protected Map<String, T> backingMap = new HashMap<String, T>(); 17 18 public JSONObjectSet() { 19 super(); 20 } 21 22 public JSONObjectSet(Collection<T> items) { 23 super(); 24 addAll(items); 25 } 26 27 protected String getKey(Object obj) { 28 return ((JSONObject) obj).get("id").toString(); 29 } 30 31 @Override 32 public boolean add(T arg0) { 33 return backingMap.put(getKey(arg0), arg0) == null; 34 } 35 36 @Override 37 public Iterator<T> iterator() { 38 return backingMap.values().iterator(); 39 } 40 41 @Override 42 public boolean remove(Object arg0) { 43 return backingMap.remove(getKey(arg0)) != null; 44 } 45 46 @Override 47 public boolean contains(Object o) { 48 return backingMap.containsKey(getKey(o)); 49 } 50 51 @Override 52 public int size() { 53 return backingMap.size(); 54 } 55 } 56
