Merging from -r468106:814127 of collections_jdk5_branch - namely where this code was generified; mostly in r738956.

Also see the following revisions:

    ------------------------------------------------------------------------
    r471201 | scolebourne | 2006-11-04 06:17:26 -0800 (Sat, 04 Nov 2006) | 1 line
    
    Remove getBag() - use covariant decorated()
    ------------------------------------------------------------------------


git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@815017 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/collections/bag/UnmodifiableBag.java

@@ -41,8 +41,8 @@ import org.apache.commons.collections.set.UnmodifiableSet;
  *
  * @author Stephen Colebourne
  */
-public final class UnmodifiableBag
-        extends AbstractBagDecorator implements Unmodifiable, Serializable {
+public final class UnmodifiableBag<E>
+        extends AbstractBagDecorator<E> implements Unmodifiable, Serializable {
 
     /** Serialization version */
     private static final long serialVersionUID = -1873799975157099624L;
@@ -56,11 +56,11 @@ public final class UnmodifiableBag
      * @return an unmodifiable Bag
      * @throws IllegalArgumentException if bag is null
      */
-    public static Bag decorate(Bag bag) {
+    public static <E> Bag<E> decorate(Bag<E> bag) {
         if (bag instanceof Unmodifiable) {
             return bag;
         }
-        return new UnmodifiableBag(bag);
+        return new UnmodifiableBag<E>(bag);
     }
 
     //-----------------------------------------------------------------------
@@ -70,7 +70,7 @@ public final class UnmodifiableBag
      * @param bag  the bag to decorate, must not be null
      * @throws IllegalArgumentException if bag is null
      */
-    private UnmodifiableBag(Bag bag) {
+    private UnmodifiableBag(Bag<E> bag) {
         super(bag);
     }
 
@@ -93,21 +93,22 @@ public final class UnmodifiableBag
      * @throws IOException
      * @throws ClassNotFoundException
      */
+    @SuppressWarnings("unchecked")
     private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
         in.defaultReadObject();
-        collection = (Collection) in.readObject();
+        collection = (Collection<E>) in.readObject();
     }
 
     //-----------------------------------------------------------------------
-    public Iterator iterator() {
-        return UnmodifiableIterator.decorate(getCollection().iterator());
+    public Iterator<E> iterator() {
+        return UnmodifiableIterator.<E>decorate(decorated().iterator());
     }
 
-    public boolean add(Object object) {
+    public boolean add(E object) {
         throw new UnsupportedOperationException();
     }
 
-    public boolean addAll(Collection coll) {
+    public boolean addAll(Collection<? extends E> coll) {
         throw new UnsupportedOperationException();
     }
 
@@ -119,16 +120,16 @@ public final class UnmodifiableBag
         throw new UnsupportedOperationException();
     }
 
-    public boolean removeAll(Collection coll) {
+    public boolean removeAll(Collection<?> coll) {
         throw new UnsupportedOperationException();
     }
 
-    public boolean retainAll(Collection coll) {
+    public boolean retainAll(Collection<?> coll) {
         throw new UnsupportedOperationException();
     }
 
     //-----------------------------------------------------------------------
-    public boolean add(Object object, int count) {
+    public boolean add(E object, int count) {
         throw new UnsupportedOperationException();
     }
 
@@ -136,9 +137,9 @@ public final class UnmodifiableBag
         throw new UnsupportedOperationException();
     }
 
-    public Set uniqueSet() {
-        Set set = getBag().uniqueSet();
-        return UnmodifiableSet.decorate(set);
+    public Set<E> uniqueSet() {
+        Set<E> set = decorated().uniqueSet();
+        return UnmodifiableSet.<E>decorate(set);
     }
 
 }