Overload method void uploadFile(String doi, File file); to void uploadFile(String doi, InputStream is, String filename);

src/main/java/com/researchspace/dataverse/api/v1/DatasetOperations.java

@@ -4,6 +4,7 @@
 package com.researchspace.dataverse.api.v1;
 
 import java.io.File;
+import java.io.InputStream;
 import java.util.List;
 
 import com.researchspace.dataverse.entities.DataSetMetadataBlock;
@@ -69,6 +70,15 @@ public interface DatasetOperations {
 	 */
 	void uploadFile(String doi, File file);
 
+	/**
+	 * Uploads a file using a data stream.
+	 *
+	 * @param doi Identifier of the dataset that we are attacking.
+	 * @param file Stream of data to the contents of the file to upload.
+	 * @param filename Name of the file.
+	 */
+	void uploadFile(String doi, InputStream file, String filename);
+
 	/**
 	 * Deletes a {@link Dataset}  
 	 * @param dsIdentifier

src/main/java/com/researchspace/dataverse/http/DataverseOperationsImplV1.java

@@ -9,6 +9,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.io.InputStream;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.List;
@@ -224,6 +225,23 @@ public void uploadFile (String doi, File file) {
 		}
 	}
 
+	@Override
+	public void uploadFile(String doi, InputStream file, String filename) {
+		FileUploader uploader = new FileUploader();
+		try {
+			uploader.deposit(file, filename, apiKey, new URI(serverURL), doi);
+		} catch (IOException | SWORDClientException  | ProtocolViolationException | URISyntaxException e) {
+			log.error("Couldn't upload file {} with doi {} : {}", filename, doi.toString(), e.getMessage());
+			throw new RestClientException(e.getMessage());
+		} catch (SWORDError error) {
+			if (!StringUtils.isEmpty(error.getErrorBody())) {
+				log.error("SwordError: {}", error.getErrorBody());
+				throw new RestClientException(error.getErrorBody());
+			}
+		}
+
+	}
+
 	/* (non-Javadoc)
 	 * @see com.researchspace.dataverse.http.DataverseAPI#deleteDataset(com.researchspace.dataverse.entities.Identifier)
 	 */

src/main/java/com/researchspace/dataverse/sword/FileUploader.java

@@ -6,6 +6,7 @@
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.net.URI;
 
 import org.swordapp.client.AuthCredentials;
@@ -57,21 +58,39 @@ public class FileUploader {
 	 */
 	public DepositReceipt deposit(File file, String apiKey, URI dataverseServer, String doi)
 			throws IOException, SWORDClientException, SWORDError, ProtocolViolationException {
+		return this.deposit(new FileInputStream(file), file.getName(), apiKey, dataverseServer, doi);
+	}
+
+
+	/**
+	 * Creates a deposit object to upload a file into a dataverse instance using the SWORD library client.
+	 *
+	 * @param is Data coming as a stream.
+	 * @param filename Name of the file to upload.
+	 * @param apiKey Key used to authenticate actions into the goal dataverse instance.
+	 * @param dataverseServer URL of the dataverse instance to attack.
+	 * @param doi To identify the dataset that is the goal of the file upload.
+	 * @return Information of the result of the upload via a {@code DepositReceipt} instance.
+	 * @throws IOException Thrown when a IO error occurs, which is a general error.
+	 * @throws SWORDClientException Thrown when an exception happens inside the SWORD client.
+	 * @throws SWORDError Thrown when an exception happens inside the SWORD client.
+	 * @throws ProtocolViolationException Thrown for unknown reasons.
+	 */
+	public DepositReceipt deposit(InputStream is, String filename, String apiKey, URI dataverseServer, String doi) throws IOException, SWORDClientException, SWORDError, ProtocolViolationException {
 		SWORDClient cli = new SWORDClient();
 		Deposit dep = new Deposit();
-		dep.setFilename(file.getName());
-		dep.setFile(new FileInputStream(file));
+		dep.setFilename(filename);
+		dep.setFile(is);
 		dep.setMimeType(APPLICATION_ZIP);
 		dep.setPackaging(ZIP_PACKAGING);
-		
+
 		AuthCredentials cred = new AuthCredentials(apiKey, "");
-	
+
 		String depositURI = dataverseServer.toString() + "/dvn/api/data-deposit/v1.1/swordv2/edit-media/study/doi:"
 				+ doi;
 		DepositReceipt rct = cli.deposit(depositURI, dep, cred);
 		log.info("Deposit received with status {}" ,rct.getStatusCode());
 		return rct;
-
 	}
 
 }