| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.lib.rop; |
| |
| import java.util.Collection; |
| import java.util.NoSuchElementException; |
| |
| import org.apache.openjpa.lib.util.Localizer; |
| |
| /** |
| * Abstract base class for read-only result lists. |
| * |
| * @author Abe White |
| */ |
| public abstract class AbstractResultList<E> implements ResultList<E> { |
| private static final long serialVersionUID = 1L; |
| |
| private transient Object _userObject; |
| |
| private static final Localizer _loc = Localizer.forPackage |
| (AbstractResultList.class); |
| |
| @Override |
| public void add(int index, Object element) { |
| throw readOnly(); |
| } |
| |
| private UnsupportedOperationException readOnly() { |
| return new UnsupportedOperationException(_loc.get("read-only") |
| .getMessage()); |
| } |
| |
| @Override |
| public boolean add(Object o) { |
| throw readOnly(); |
| } |
| |
| @Override |
| public boolean addAll(Collection<? extends E> c) { |
| throw readOnly(); |
| } |
| |
| @Override |
| public boolean addAll(int index, Collection<? extends E> c) { |
| throw readOnly(); |
| } |
| |
| @Override |
| public E remove(int index) { |
| throw readOnly(); |
| } |
| |
| @Override |
| public boolean remove(Object o) { |
| throw readOnly(); |
| } |
| |
| @Override |
| public boolean removeAll(Collection<?> c) { |
| throw readOnly(); |
| } |
| |
| @Override |
| public boolean retainAll(Collection<?> c) { |
| throw readOnly(); |
| } |
| |
| @Override |
| public E set(int index, Object element) { |
| throw readOnly(); |
| } |
| |
| @Override |
| public void clear() { |
| throw readOnly(); |
| } |
| |
| protected void assertOpen() { |
| if (isClosed()) |
| throw new NoSuchElementException(_loc.get("closed").getMessage()); |
| } |
| |
| @Override |
| public final Object getUserObject() { |
| return _userObject; |
| } |
| |
| @Override |
| public final void setUserObject(Object opaque) { |
| _userObject = opaque; |
| } |
| |
| } |