/* * 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.nifi.controller.repository.io; import java.io.IOException; import java.io.OutputStream; /** * Wraps an existing OutputStream, so that when {@link OutputStream#close()} is called, the underlying OutputStream is NOT closed but this OutputStream can no longer be written to */ public class DisableOnCloseOutputStream extends OutputStream { private final OutputStream wrapped; private boolean closed = false; public DisableOnCloseOutputStream(final OutputStream toWrap) { wrapped = toWrap; } @Override public void write(int b) throws IOException { if (closed) { throw new IOException("Stream is closed"); } wrapped.write(b); } @Override public void write(byte[] b, int off, int len) throws IOException { if (closed) { throw new IOException("Stream is closed"); } wrapped.write(b, off, len); } @Override public void write(byte[] b) throws IOException { if (closed) { throw new IOException("Stream is closed"); } wrapped.write(b); } @Override public void flush() throws IOException { wrapped.flush(); } @Override public void close() throws IOException { wrapped.flush(); closed = true; } }