/**
* 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.camel.component.cmis;
import java.io.InputStream;
import java.util.Map;
import org.apache.chemistry.opencmis.client.api.CmisObject;
import org.apache.chemistry.opencmis.client.api.Document;
import org.apache.chemistry.opencmis.client.api.Folder;
import org.apache.chemistry.opencmis.client.api.ItemIterable;
import org.apache.chemistry.opencmis.client.api.OperationContext;
import org.apache.chemistry.opencmis.commons.data.ContentStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class RecursiveTreeWalker {
private static final Logger LOG = LoggerFactory.getLogger(RecursiveTreeWalker.class);
private final CMISConsumer cmisConsumer;
private final boolean readContent;
private final int readCount;
private final int pageSize;
private int totalPolled;
public RecursiveTreeWalker(CMISConsumer cmisConsumer, boolean readContent, int readCount, int pageSize) {
this.cmisConsumer = cmisConsumer;
this.readContent = readContent;
this.readCount = readCount;
this.pageSize = pageSize;
}
int processFolderRecursively(Folder folder) throws Exception {
processFolderNode(folder);
OperationContext operationContext = cmisConsumer.createOperationContext();
operationContext.setMaxItemsPerPage(pageSize);
int count = 0;
int pageNumber = 0;
boolean finished = false;
ItemIterable<CmisObject> itemIterable = folder.getChildren(operationContext);
while (!finished) {
ItemIterable<CmisObject> currentPage = itemIterable.skipTo(count).getPage();
LOG.debug("Processing page {}", pageNumber);
for (CmisObject child : currentPage) {
if (CMISHelper.isFolder(child)) {
Folder childFolder = (Folder)child;
processFolderRecursively(childFolder);
} else {
processNonFolderNode(child, folder);
}
count++;
if (totalPolled == readCount) {
finished = true;
break;
}
}
pageNumber++;
if (!currentPage.getHasMoreItems()) {
finished = true;
}
}
return totalPolled;
}
private void processNonFolderNode(CmisObject cmisObject, Folder parentFolder) throws Exception {
InputStream inputStream = null;
Map<String, Object> properties = CMISHelper.objectProperties(cmisObject);
properties.put(CamelCMISConstants.CMIS_FOLDER_PATH, parentFolder.getPath());
if (CMISHelper.isDocument(cmisObject) && readContent) {
ContentStream contentStream = ((Document)cmisObject).getContentStream();
if (contentStream != null) {
inputStream = contentStream.getStream();
}
}
sendNode(properties, inputStream);
}
private void processFolderNode(Folder folder) throws Exception {
sendNode(CMISHelper.objectProperties(folder), null);
}
private void sendNode(Map<String, Object> properties, InputStream inputStream) throws Exception {
totalPolled += cmisConsumer.sendExchangeWithPropsAndBody(properties, inputStream);
}
}