org.apache.cxf.io.AbstractWrappedOutputStream Maven / Gradle / Ivy
/**
* 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.cxf.io;
import java.io.IOException;
import java.io.OutputStream;
/**
* Provides a convenient hook onFirstWrite() for those needing
* to wrap an output stream.
*
*/
public abstract class AbstractWrappedOutputStream extends OutputStream {
protected OutputStream wrappedStream;
protected boolean written;
protected AbstractWrappedOutputStream() {
super();
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
if (!written) {
onFirstWrite();
written = true;
}
if (wrappedStream != null) {
wrappedStream.write(b, off, len);
}
}
protected void onFirstWrite() throws IOException {
}
@Override
public void write(byte[] b) throws IOException {
write(b, 0, b.length);
}
@Override
public void write(int b) throws IOException {
if (!written) {
onFirstWrite();
written = true;
}
if (wrappedStream != null) {
wrappedStream.write(b);
}
}
@Override
public void close() throws IOException {
if (wrappedStream != null) {
wrappedStream.close();
}
}
@Override
public void flush() throws IOException {
if (written && wrappedStream != null) {
wrappedStream.flush();
}
}
}