| /* ==================================================================== |
| 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.poi.poifs.nio; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * Common definition of how we read and write bytes |
| */ |
| public abstract class DataSource { |
| public abstract ByteBuffer read(int length, long position) throws IOException; |
| public abstract void write(ByteBuffer src, long position) throws IOException; |
| public abstract long size() throws IOException; |
| /** Close the underlying stream */ |
| public abstract void close() throws IOException; |
| /** Copies the contents to the specified OutputStream */ |
| public abstract void copyTo(OutputStream stream) throws IOException; |
| } |