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/*
 * Copyright 2012 Artur Keska.
 *
 * 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 org.jaxygen.dto;

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

/**
 * Interface to file uploaded to over the HTTP protocol. Once can use the
 * Uploadabel as a field of DTO object. Engine will automatically fill it if
 * found corresponding file in the multipart content.
 *
 * @author Artur Keska
 */
public interface Uploadable extends Serializable {

    /**
     * Get temporary file associated with the request. The file is valid during
     * the request time only.
     * Note, the file must be removed by the caller.
     *
     * @return A temporary file associated with the file uploaded to the server.
     * @throws java.io.IOException .
     */
    File getFile() throws IOException;

    /**
     * Get input stream that reads the content of the file. This method is
     * useful in case if the file is small (fits in to the memory) and do not
     * need to be stored in the filesystem during upload.
     * @return Input stream to the uploaded file. Note, this stream must be closed by the caller.
     * @throws java.io.IOException .
     */
    InputStream getInputStream() throws IOException;

    /**
     * Get original name of the file.
     *
     * @return An oryginal file name.
     */
    String getOriginalName();

    /**
     * Get mime type.
     *
     * @return Mime type.
     */
    String getMimeType();
    
    /** Free resources allocated by uploadable file
     * 
     */
    void dispose();
}