| // Copyright 2010 Google Inc. |
| // |
| // Licensed 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 com.google.gwtorm.server; |
| |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * Simple implementation of a {@link ResultSet}. |
| * |
| * @param <T> type of the object to be returned from the result set. |
| */ |
| public abstract class AbstractResultSet<T> implements ResultSet<T> { |
| @Override |
| public final Iterator<T> iterator() { |
| return new Iterator<T>() { |
| @Override |
| public boolean hasNext() { |
| return AbstractResultSet.this.hasNext(); |
| } |
| |
| @Override |
| public T next() { |
| return AbstractResultSet.this.next(); |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| |
| @Override |
| public List<T> toList() { |
| List<T> r = new ArrayList<>(); |
| for (T obj : this) { |
| r.add(obj); |
| } |
| return r; |
| } |
| |
| /** @return true if another result remains, false otherwise. */ |
| protected abstract boolean hasNext(); |
| |
| /** @return next result. */ |
| protected abstract T next(); |
| } |