org.apache.axiom.attachments.MultipartBodyAdapter 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.axiom.attachments;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import javax.activation.DataHandler;
import org.apache.axiom.blob.WritableBlobFactory;
import org.apache.axiom.mime.ContentType;
import org.apache.axiom.mime.DataHandlerFactory;
import org.apache.axiom.mime.Header;
import org.apache.axiom.mime.MultipartBody;
import org.apache.axiom.mime.MultipartBody.PartCreationListener;
import org.apache.axiom.mime.Part;
import org.apache.axiom.om.OMException;
import org.apache.axiom.util.UIDGenerator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
final class MultipartBodyAdapter extends AttachmentsDelegate implements PartCreationListener {
private static final Log log = LogFactory.getLog(MultipartBodyAdapter.class);
private final MultipartBody message;
private final Map map = new LinkedHashMap();
private final int contentLength;
private final CountingInputStream filterIS;
private final Part rootPart;
private final String rootPartContentID;
private Iterator partIterator;
/** Container to hold streams for direct access */
private IncomingAttachmentStreams streams;
MultipartBodyAdapter(InputStream inStream, String contentTypeString,
WritableBlobFactory attachmentBlobFactory, int contentLength) {
this.contentLength = contentLength;
if (log.isDebugEnabled()) {
log.debug("Attachments contentLength=" + contentLength + ", contentTypeString=" + contentTypeString);
}
// If the length is not known, install a filter so that we can retrieve it later.
if (contentLength <= 0) {
filterIS = new CountingInputStream(inStream);
inStream = filterIS;
} else {
filterIS = null;
}
this.message = MultipartBody.builder()
.setInputStream(inStream)
.setContentType(contentTypeString)
.setAttachmentBlobFactory(attachmentBlobFactory)
.setDataHandlerFactory(new DataHandlerFactory() {
@Override
public DataHandler createDataHandler(Part part) {
return new LegacyPartDataHandler(part);
}
})
.setPartCreationListener(this)
.build();
rootPart = message.getRootPart();
String rootPartContentID = rootPart.getContentID();
if (rootPartContentID == null) {
rootPartContentID = "firstPart_" + UIDGenerator.generateContentId();
map.put(rootPartContentID, rootPart.getDataHandler());
}
this.rootPartContentID = rootPartContentID;
}
@Override
public void partCreated(Part part) {
String contentID = part.getContentID();
if (contentID != null) {
map.put(contentID, part.getDataHandler());
}
}
private boolean fetchNext() {
if (streams != null) {
throw new IllegalStateException("The attachments stream can only be accessed once; either by using the IncomingAttachmentStreams class or by getting a collection of AttachmentPart objects. They cannot both be called within the life time of the same service request.");
}
if (partIterator == null) {
partIterator = message.iterator();
}
if (partIterator.hasNext()) {
// This will add the DataHandler to the map (via the PartCreationListener interface)
Part part = partIterator.next();
if (part != rootPart) {
String contentID = part.getContentID();
if (contentID == null) {
throw new OMException(
"Part content ID cannot be blank for non root MIME parts");
}
}
return true;
} else {
return false;
}
}
private void fetchAll() {
while (fetchNext()) {
// Just loop
}
}
@Override
ContentType getContentType() {
return message.getContentType();
}
@Override
DataHandler getDataHandler(String contentID) {
do {
DataHandler dataHandler = map.get(contentID);
if (dataHandler != null) {
return dataHandler;
}
} while (fetchNext());
return null;
}
@Override
void addDataHandler(String contentID, DataHandler dataHandler) {
fetchAll();
map.put(contentID, dataHandler);
}
@Override
void removeDataHandler(String contentID) {
do {
if (map.remove(contentID) != null) {
return;
}
} while (fetchNext());
}
@Override
InputStream getRootPartInputStream(boolean preserve) {
return rootPart.getInputStream(preserve);
}
@Override
String getRootPartContentID() {
return rootPartContentID;
}
@Override
String getRootPartContentType() {
return rootPart.getHeader(Header.CONTENT_TYPE);
}
@Override
IncomingAttachmentStreams getIncomingAttachmentStreams() {
if (partIterator != null) {
throw new IllegalStateException(
"The attachments stream can only be accessed once; either by using the IncomingAttachmentStreams class or by getting a " +
"collection of AttachmentPart objects. They cannot both be called within the life time of the same service request.");
}
if (streams == null) {
streams = new IncomingAttachmentStreams(message);
}
return streams;
}
@Override
Set getContentIDs(boolean fetchAll) {
if (fetchAll) {
fetchAll();
}
return map.keySet();
}
@Override
Map getMap() {
fetchAll();
return Collections.unmodifiableMap(map);
}
@Override
long getContentLength() throws IOException {
if (contentLength > 0) {
return contentLength;
} else {
// Ensure all parts are read
fetchAll();
// Now get the count from the filter
return filterIS.getCount();
}
}
@Override
MultipartBody getMultipartBody() {
return message;
}
}