org.apache.camel.component.google.drive.GoogleDriveFilesConverter Maven / Gradle / Ivy

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Camel Component for GoogleDrive
There is a newer version: 4.8.1
/*
 * 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.google.drive;

import java.io.File;
import java.io.InputStream;

import com.google.api.client.http.FileContent;
import com.google.api.client.http.InputStreamContent;
import com.google.api.services.drive.Drive;
import org.apache.camel.Converter;
import org.apache.camel.Exchange;
import org.apache.camel.component.file.GenericFile;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Converter(generateLoader = true)
public final class GoogleDriveFilesConverter {
    private static final Logger LOG = LoggerFactory.getLogger(GoogleDriveFilesConverter.class);

    private GoogleDriveFilesConverter() {
    }

    @Converter
    public static com.google.api.services.drive.model.File genericFileToGoogleDriveFile(GenericFile file, Exchange exchange)
            throws Exception {
        if (file.getFile() instanceof File) {
            File f = (File) file.getFile();
            com.google.api.services.drive.model.File fileMetadata = new com.google.api.services.drive.model.File();
            fileMetadata.setName(f.getName());
            FileContent mediaContent = new FileContent(null, f);
            if (exchange != null) {
                exchange.getIn().setHeader("CamelGoogleDrive.content", fileMetadata);
                exchange.getIn().setHeader("CamelGoogleDrive.mediaContent", mediaContent);
            }
            return fileMetadata;
        }
        if (exchange != null) {
            // body wasn't a java.io.File so let's try to convert it
            file.getBinding().loadContent(exchange, file);
            InputStream is = exchange.getContext().getTypeConverter().convertTo(InputStream.class, exchange, file.getBody());

            com.google.api.services.drive.model.File fileMetadata = new com.google.api.services.drive.model.File();
            fileMetadata.setName(file.getFileName());
            InputStreamContent mediaContent = new InputStreamContent(null, is);
            exchange.getIn().setHeader("CamelGoogleDrive.content", fileMetadata);
            exchange.getIn().setHeader("CamelGoogleDrive.mediaContent", mediaContent);

            return fileMetadata;
        }
        return null;
    }

    // TODO: how to download the file

    // convenience method that takes google file metadata and converts that to an inputstream
    //    @Converter(allowNull = true)
    //    public static InputStream download(com.google.api.services.drive.model.File fileMetadata, Exchange exchange)
    //            throws Exception {
    //        if (fileMetadata.getDownloadUrl() != null && fileMetadata.getDownloadUrl().length() > 0) {
    //            try {
    //                 TODO maybe separate this out as custom drive API ex. google-drive://download...
    //                HttpResponse resp = getClient(exchange).getRequestFactory()
    //                        .buildGetRequest(new GenericUrl(fileMetadata.getDownloadUrl())).execute();
    //                return resp.getContent();
    //            } catch (IOException e) {
    //                LOG.debug("Could not download file.", e);
    //                return null;
    //            }
    //        } else {
    //             The file doesn't have any content stored on Drive.
    //            return null;
    //        }
    //    }

    //    @Converter
    //    public static String downloadContentAsString(com.google.api.services.drive.model.File fileMetadata, Exchange exchange)
    //            throws Exception {
    //        InputStream is = download(fileMetadata, exchange);
    //        if (is != null) {
    //            return exchange.getContext().getTypeConverter().convertTo(String.class, exchange, is);
    //        }
    //        return null;
    //    }

    private static Drive getClient(Exchange exchange) {
        GoogleDriveComponent component = exchange.getContext().getComponent("google-drive", GoogleDriveComponent.class);
        return component.getClient(component.getConfiguration());
    }
}