| /* |
| * 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.carbondata.common; |
| |
| import java.util.Iterator; |
| |
| /** |
| * CarbonIterator adds default implement for remove. This is required for Java 7. |
| * @param <E> |
| */ |
| public abstract class CarbonIterator<E> implements Iterator<E> { |
| |
| @Override public abstract boolean hasNext(); |
| |
| @Override public abstract E next(); |
| |
| @Override public void remove() { |
| throw new UnsupportedOperationException("remove"); |
| } |
| |
| /** |
| * Initialize the iterator |
| */ |
| public void initialize() { |
| // sub classes can overwrite to provide initialize logic to this method |
| } |
| |
| /** |
| * Close the resources |
| */ |
| public void close() { |
| // sub classes can overwrite to provide close logic to this method |
| } |
| |
| } |