com.foc.vaadin.gui.components.BlobResource.java Source code

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Here is the source code for com.foc.vaadin.gui.components.BlobResource.java

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/*******************************************************************************
 * Copyright 2016 Antoine Nicolas SAMAHA
 * 
 * Licensed 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 com.foc.vaadin.gui.components;

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

import com.foc.Globals;
import com.foc.property.FCloudStorageProperty;
import com.foc.util.Utils;
import com.vaadin.server.ConnectorResource;
import com.vaadin.server.DownloadStream;
import com.vaadin.server.Page;

@SuppressWarnings("serial")
//public class BlobResource extends FileResource{
public class BlobResource implements ConnectorResource {

    private InputStream is = null;
    private String fileName = null;

    public BlobResource(File sourceFile, InputStream is, String fileName) {
        //     super(sourceFile);
        fileName = fileName.replaceAll(" ", "_");
        if (fileName == null) {
            fileName = "Everpro";
        }
        this.fileName = fileName;
        this.is = is;
    }

    @Override
    public DownloadStream getStream() {
        DownloadStream downloadStream = null;

        if (is != null) {
            downloadStream = new DownloadStream(is, "application/x-unknown", fileName);
            downloadStream.setParameter("Content-Disposition", "attachment; filename=" + fileName);
            downloadStream.setCacheTime(0);
        }

        return downloadStream;
    }

    public void openDownloadWindow() {
        //      setCacheTime(0);
        Page.getCurrent().open(this, null, true);
    }

    public static BlobResource newBlobResource(FCloudStorageProperty cloudStorageProperty) {
        if (Utils.isStringEmpty(cloudStorageProperty.getKey())) {
            Globals.logString("DOWNLOAD: newBlobResource 1 Key Empty, generating it");
            cloudStorageProperty.generateKey();
        }

        Globals.logString("DOWNLOAD: newBlobResource 1bis Key=" + cloudStorageProperty.getKey());

        if (cloudStorageProperty.getDirectory() == null) {
            Globals.logString("DOWNLOAD: newBlobResource 2 Directory null computing it");
            cloudStorageProperty.setDirectory(Globals.getApp().getCloudStorageDirectory(), false);
        }

        Globals.logString("DOWNLOAD: newBlobResource 2bis Key=" + cloudStorageProperty.getDirectory());

        InputStream is = (InputStream) cloudStorageProperty.getObject();

        if (is == null)
            Globals.logString("DOWNLOAD: newBlobResource 3 inputStream is null");
        else
            Globals.logString("DOWNLOAD: newBlobResource 3bis inputStream is Good");

        Globals.logString("DOWNLOAD: newBlobResource 4 FileName : " + cloudStorageProperty.getFileName());

        File file = new File(cloudStorageProperty.getFileName());
        Globals.logString("DOWNLOAD: newBlobResource 5");
        BlobResource resource = new BlobResource(file, is, cloudStorageProperty.getFileName());
        Globals.logString("DOWNLOAD: newBlobResource 6");
        return resource;
    }

    @Override
    public String getMIMEType() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public String getFilename() {
        return this.fileName;
    }
}