org.apache.myfaces.custom.fileupload.UploadedFileDefaultMemoryImpl Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of tomahawk Show documentation

JSF components and utilities that can be used with any JSF implementation. This library is compatible with both JSF1.1 and JSF1.2; however for JSF1.2 users there is an alternative build of Tomahawk available that takes advantage of JSF1.2 features to offer some additional benefits.

There is a newer version: 1.1.14

Show newest version

/*
 * 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.myfaces.custom.fileupload;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItem;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;


/**
 * @author Sylvain Vieujot (latest modification by $Author: lu4242 $)
 * @version $Revision: 782291 $ $Date: 2009-06-06 13:03:52 -0500 (Sat, 06 Jun 2009) $
 */
public class UploadedFileDefaultMemoryImpl extends UploadedFileDefaultImplBase
{
    private static final long serialVersionUID = -6006333070975059090L;
    private byte[] bytes;
    private StorageStrategy storageStrategy;
    private transient FileItem fileItem = null;

    public UploadedFileDefaultMemoryImpl(final FileItem fileItem) throws IOException
    {
        super(fileItem.getName(), fileItem.getContentType());
        int sizeInBytes = (int)fileItem.getSize();
        bytes = new byte[sizeInBytes];
        this.fileItem = fileItem;
        fileItem.getInputStream().read(bytes);
        this.storageStrategy = new DefaultMemoryStorageStrategy();
    }
    
    private class DefaultMemoryStorageStrategy 
        extends StorageStrategy implements Serializable
    {
        private static final long serialVersionUID = 3610866246514636068L;

        public void deleteFileContents()
        {
          // UploadedFileDefaultMemoryImpl.this.fileItem becomes null 
          // when the parent class is serialized and deserialized.
          // In this case, the instance contained by the original
          // object is garbage collected, so we don't have to 
          // worry about it.
          if (UploadedFileDefaultMemoryImpl.this.fileItem != null)
          {
              UploadedFileDefaultMemoryImpl.this.fileItem.delete();
          }
          bytes = null;
        }
    }

    /**
     * Answer the uploaded file contents.
     *
     * @return file contents
     */
    public byte[] getBytes()
    {
        return bytes;
    }


    /**
     * Answer the uploaded file contents input stream
     *
     * @return InputStream
     * @throws IOException
     */
    public InputStream getInputStream() throws IOException
    {
        return new ByteArrayInputStream( bytes );
    }

    /**
     * Answer the size of this file.
     * @return long
     */
    public long getSize() {
        if( bytes == null )
            return 0;
        return bytes.length;
    }

    public StorageStrategy getStorageStrategy() {
      return storageStrategy;
    }    
}