/*
* Copyright 2005-2010 the original author or authors.
*
* Licensed 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.springframework.ws.transport;
import java.io.IOException;
import java.io.OutputStream;
import org.springframework.util.Assert;
/**
* A {@code TransportOutputStream} is an output stream with MIME input headers. It is used to write {@link
* org.springframework.ws.WebServiceMessage WebServiceMessages} to a transport.
*
* @author Arjen Poutsma
* @see #addHeader(String,String)
* @since 1.0.0
*/
public abstract class TransportOutputStream extends OutputStream {
private OutputStream outputStream;
protected TransportOutputStream() {
}
private OutputStream getOutputStream() throws IOException {
if (outputStream == null) {
outputStream = createOutputStream();
Assert.notNull(outputStream, "outputStream must not be null");
}
return outputStream;
}
@Override
public void close() throws IOException {
getOutputStream().close();
}
@Override
public void flush() throws IOException {
getOutputStream().flush();
}
@Override
public void write(byte b[]) throws IOException {
getOutputStream().write(b);
}
@Override
public void write(byte b[], int off, int len) throws IOException {
getOutputStream().write(b, off, len);
}
@Override
public void write(int b) throws IOException {
getOutputStream().write(b);
}
/**
* Adds a header with the given name and value. This method can be called multiple times, to allow for headers with
* multiple values.
*
* @param name the name of the header
* @param value the value of the header
*/
public abstract void addHeader(String name, String value) throws IOException;
/** Returns the output stream to write to. */
protected abstract OutputStream createOutputStream() throws IOException;
}