1 files changed, 0 insertions, 128 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/Bag.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/Bag.java
deleted file mode 100644
index 75905c81d4..0000000000
--- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/Bag.java
+++ /dev/null
@@ -1,128 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2005, 2008 Oracle. All rights reserved.
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0, which accompanies this distribution
- * and is available at http://www.eclipse.org/legal/epl-v10.html.
- * 
- * Contributors:
- *     Oracle - initial API and implementation
- ******************************************************************************/
-package org.eclipse.jpt.utility.internal;
-
-import java.io.Serializable;
-import java.util.AbstractCollection;
-import java.util.Iterator;
-
-import org.eclipse.jpt.utility.internal.iterators.EmptyIterator;
-
-/**
- * A collection that allows duplicate elements.
- * <p>
- * The <code>Bag</code> interface places additional stipulations,
- * beyond those inherited from the <code>java.util.Collection</code> interface,
- * on the contracts of the <code>equals</code> and <code>hashCode</code> methods.
- * 
- * @see HashBag
- */
-
-public interface Bag<E> extends java.util.Collection<E> {
-
-	/**
-	 * Compares the specified object with this bag for equality. Returns
-	 * <code>true</code> if the specified object is also a bag, the two bags
-	 * have the same size, and every member of the specified bag is
-	 * contained in this bag with the same number of occurrences (or equivalently,
-	 * every member of this bag is contained in the specified bag with the same
-	 * number of occurrences). This definition ensures that the
-	 * equals method works properly across different implementations of the
-	 * bag interface.
-	 */
-	boolean equals(Object o);
-
-	/**
-	 * Returns the hash code value for this bag. The hash code of a bag is
-	 * defined to be the sum of the hash codes of the elements in the bag,
-	 * where the hashcode of a <code>null</code> element is defined to be zero.
-	 * This ensures that <code>b1.equals(b2)</code> implies that
-	 * <code>b1.hashCode() == b2.hashCode()</code> for any two bags
-	 * <code>b1</code> and <code>b2</code>, as required by the general
-	 * contract of the <code>Object.hashCode</code> method.
-	 */
-	int hashCode();
-
-	/**
-	 * Return the number of times the specified object occurs in the bag.
-	 */
-	int count(Object o);
-
-	/**
-	 * Add the specified object the specified number of times to the bag.
-	 */
-	boolean add(E o, int count);
-
-	/**
-	 * Remove the specified number of occurrences of the specified object
-	 * from the bag. Return whether the bag changed.
-	 */
-	boolean remove(Object o, int count);
-
-	/**
-	 * Return an iterator that returns each item in the bag
-	 * once and only once, irrespective of how many times
-	 * the item was added to the bag.
-	 */
-	java.util.Iterator<E> uniqueIterator();
-
-
-	final class Empty<E> extends AbstractCollection<E> implements Bag<E>, Serializable {
-		@SuppressWarnings("unchecked")
-		public static final Bag INSTANCE = new Empty();
-		@SuppressWarnings("unchecked")
-		public static <T> Bag<T> instance() {
-			return INSTANCE;
-		}
-		// ensure single instance
-		private Empty() {
-			super();
-		}
-		@Override
-		public Iterator<E> iterator() {
-			return EmptyIterator.instance();
-		}
-		@Override
-		public int size() {
-			return 0;
-		}
-		public Iterator<E> uniqueIterator() {
-			return EmptyIterator.instance();
-		}
-		public int count(Object o) {
-			return 0;
-		}
-		public boolean remove(Object o, int count) {
-			return false;
-		}
-		public boolean add(E o, int count) {
-			throw new UnsupportedOperationException();
-		}
-		@Override
-		public boolean equals(Object o) {
-			if (o == this) {
-				return true;
-			}
-			if ( ! (o instanceof Bag)) {
-				return false;
-			}
-			return ((Bag<?>) o).size() == 0;
-		}
-		@Override
-		public int hashCode() {
-			return 0;
-		}
-		private static final long serialVersionUID = 1L;
-		private Object readResolve() {
-			return INSTANCE;
-		}
-	}
-
-}