/*
* Copyright 2005-2014 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.mime;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import org.springframework.core.io.InputStreamSource;
import org.springframework.core.io.Resource;
import org.springframework.util.Assert;
/**
* Abstract implementation of the {@link MimeMessage} interface. Contains convenient default implementations.
*
* @author Arjen Poutsma
* @since 1.0.0
*/
public abstract class AbstractMimeMessage implements MimeMessage {
@Override
public final Attachment addAttachment(String contentId, File file) throws AttachmentException {
Assert.hasLength(contentId, "contentId must not be empty");
Assert.notNull(file, "File must not be null");
DataHandler dataHandler = new DataHandler(new FileDataSource(file));
return addAttachment(contentId, dataHandler);
}
@Override
public final Attachment addAttachment(String contentId, InputStreamSource inputStreamSource, String contentType) {
Assert.hasLength(contentId, "contentId must not be empty");
Assert.notNull(inputStreamSource, "InputStreamSource must not be null");
if (inputStreamSource instanceof Resource && ((Resource) inputStreamSource).isOpen()) {
throw new IllegalArgumentException("Passed-in Resource contains an open stream: invalid argument. " +
"MIME requires an InputStreamSource that creates a fresh stream for every call.");
}
DataHandler dataHandler = new DataHandler(new InputStreamSourceDataSource(inputStreamSource, contentType));
return addAttachment(contentId, dataHandler);
}
/**
* Activation framework {@code DataSource} that wraps a Spring {@code InputStreamSource}.
*
* @author Arjen Poutsma
* @since 1.0.0
*/
private static class InputStreamSourceDataSource implements DataSource {
private final InputStreamSource inputStreamSource;
private final String contentType;
public InputStreamSourceDataSource(InputStreamSource inputStreamSource, String contentType) {
this.inputStreamSource = inputStreamSource;
this.contentType = contentType;
}
@Override
public InputStream getInputStream() throws IOException {
return inputStreamSource.getInputStream();
}
@Override
public OutputStream getOutputStream() {
throw new UnsupportedOperationException("Read-only javax.activation.DataSource");
}
@Override
public String getContentType() {
return contentType;
}
@Override
public String getName() {
if (inputStreamSource instanceof Resource) {
Resource resource = (Resource) inputStreamSource;
return resource.getFilename();
}
else {
throw new UnsupportedOperationException("DataSource name not available");
}
}
}
}