| /* ==================================================================== |
| 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.openxml4j.opc.internal; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /** |
| * Build an output stream for MemoryPackagePart. |
| * |
| * @author Julien Chable |
| */ |
| public final class MemoryPackagePartOutputStream extends OutputStream { |
| |
| private MemoryPackagePart _part; |
| |
| private ByteArrayOutputStream _buff; |
| |
| public MemoryPackagePartOutputStream(MemoryPackagePart part) { |
| this._part = part; |
| _buff = new ByteArrayOutputStream(); |
| } |
| |
| @Override |
| public void write(int b) { |
| _buff.write(b); |
| } |
| |
| /** |
| * Close this stream and flush the content. |
| * @see #flush() |
| */ |
| @Override |
| public void close() throws IOException { |
| this.flush(); |
| } |
| |
| /** |
| * Flush this output stream. This method is called by the close() method. |
| * Warning : don't call this method for output consistency. |
| * @see #close() |
| */ |
| @Override |
| public void flush() throws IOException { |
| _buff.flush(); |
| if (_part.data != null) { |
| byte[] newArray = new byte[_part.data.length + _buff.size()]; |
| // copy the previous contents of part.data in newArray |
| System.arraycopy(_part.data, 0, newArray, 0, _part.data.length); |
| |
| // append the newly added data |
| byte[] buffArr = _buff.toByteArray(); |
| System.arraycopy(buffArr, 0, newArray, _part.data.length, |
| buffArr.length); |
| |
| // save the result as new data |
| _part.data = newArray; |
| } else { |
| // was empty, just fill it |
| _part.data = _buff.toByteArray(); |
| } |
| |
| /* |
| * Clear this streams buffer, in case flush() is called a second time |
| * Fix bug 1921637 - provided by Rainer Schwarze |
| */ |
| _buff.reset(); |
| } |
| |
| @Override |
| public void write(byte[] b, int off, int len) { |
| _buff.write(b, off, len); |
| } |
| |
| @Override |
| public void write(byte[] b) throws IOException { |
| _buff.write(b); |
| } |
| } |