Example usage for com.mongodb.gridfs GridFS find

Introduction

In this page you can find the example usage for com.mongodb.gridfs GridFS find.

Prototype

public List<GridFSDBFile> find(final DBObject query, final DBObject sort) 

Source Link

Document

Finds a list of files matching the given query.

Usage

From source file:eu.eubrazilcc.lvl.storage.mongodb.MongoDBConnector.java

License:EUPL

/**
 * Gets the version of the <tt>filename</tt> with the latest uploaded date.
 * @param gridfs - GridFS client//  ww w.  java2s  . c  om
 * @param filename - filename to be searched for in the database
 * @return the version of the file identified by the provided filename with the latest uploaded date. 
 */
private GridFSDBFile getLatestUploadedFile(final GridFS gridfs, final String filename) {
    return getFirst(gridfs.find(filename.trim(), new BasicDBObject("uploadDate", -1)), null);
}

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From source file:eu.eubrazilcc.lvl.storage.mongodb.MongoDBConnector.java

License:EUPL

public void removeOpenAccessLink(final @Nullable String namespace, final String filename) {
    checkArgument(isNotBlank(filename), "Uninitialized or invalid filename");
    final String namespace2 = trimToEmpty(namespace);
    final String filename2 = filename.trim();
    final DB db = client().getDB(CONFIG_MANAGER.getDbName());
    final GridFS gfsNs = isNotBlank(namespace2) ? new GridFS(db, namespace2) : new GridFS(db);
    final List<GridFSDBFile> files = gfsNs.find(new BasicDBObject("filename", filename2)
            .append(FILE_OPEN_ACCESS_LINK_PROP, new BasicDBObject("$exists", true)),
            new BasicDBObject("uploadDate", -1));
    for (final GridFSDBFile file : files) {
        if (file.getMetaData() != null) {
            file.getMetaData().removeField(OPEN_ACCESS_LINK_ATTR);
            file.getMetaData().removeField(OPEN_ACCESS_DATE_ATTR);
            file.save();/*from  w w w. j  a v a  2s . c  o m*/
        }
    }
    /* ideally we want to use a cursor here, but the save() operation fails
       final DBCursor cursor = gfsNs.getFileList(new BasicDBObject("filename", filename2).append(FILE_OPEN_ACCESS_LINK_PROP, 
       new BasicDBObject("$exists", true)));
       try {
    while (cursor.hasNext()) {
       final GridFSDBFile file = (GridFSDBFile) cursor.next();
       if (file.getMetaData() != null) {
          file.getMetaData().removeField(OPEN_ACCESS_LINK_ATTR);
          file.getMetaData().removeField(OPEN_ACCESS_DATE_ATTR); // this fails
          file.save();
       }
    }
       } finally {
    cursor.close();
       } */
}

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