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DSpace core data model and service APIs.
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/**
 * The contents of this file are subject to the license and copyright
 * detailed in the LICENSE and NOTICE files at the root of the source
 * tree and available online at
 *
 * http://www.dspace.org/license/
 */
package org.dspace.content.service;

import java.sql.SQLException;
import java.util.List;

import org.dspace.content.Bitstream;
import org.dspace.content.BitstreamFormat;
import org.dspace.core.Context;
import org.dspace.service.DSpaceCRUDService;

/**
 * Service interface class for the BitstreamFormat object.
 * The implementation of this class is responsible for all business logic calls for the BitstreamFormat object and is
 * autowired by spring
 *
 * @author kevinvandevelde at atmire.com
 */
public interface BitstreamFormatService extends DSpaceCRUDService {


    /**
     * Find a bitstream format by its (unique) MIME type.
     * If more than one bitstream format has the same MIME type, the
     * one returned is unpredictable.
     *
     * @param context  DSpace context object
     * @param mimeType MIME type value
     * @return the corresponding bitstream format, or null if
     * there's no bitstream format with the given MIMEtype.
     * @throws SQLException if database error
     */
    public BitstreamFormat findByMIMEType(Context context, String mimeType) throws SQLException;

    /**
     * Find a bitstream format by its (unique) short description
     *
     * @param context DSpace context object
     * @param desc    the short description
     * @return the corresponding bitstream format, or null if
     * there's no bitstream format with the given short description
     * @throws SQLException if database error
     */
    public BitstreamFormat findByShortDescription(Context context, String desc) throws SQLException;

    /**
     * Get the generic "unknown" bitstream format.
     *
     * @param context DSpace context object
     * @return the "unknown" bitstream format.
     * @throws SQLException          if database error
     * @throws IllegalStateException if the "unknown" bitstream format couldn't be found
     */
    public BitstreamFormat findUnknown(Context context) throws SQLException;

    /**
     * Retrieve all bitstream formats from the registry, ordered by ID
     *
     * @param context DSpace context object
     * @return the bitstream formats.
     * @throws SQLException if database error
     */
    public List findAll(Context context) throws SQLException;

    /**
     * Retrieve all non-internal bitstream formats from the registry. The
     * "unknown" format is not included, and the formats are ordered by support
     * level (highest first) first then short description.
     *
     * @param context DSpace context object
     * @return the bitstream formats.
     * @throws SQLException if database error
     */
    public List findNonInternal(Context context) throws SQLException;

    /**
     * Set the short description of the bitstream format
     *
     * @param context          context
     * @param bitstreamFormat  format
     * @param shortDescription the new short description
     * @throws SQLException if database error
     */
    public void setShortDescription(Context context, BitstreamFormat bitstreamFormat, String shortDescription)
        throws SQLException;

    /**
     * Get the support level text for this bitstream format - one of
     * UNKNOWN,KNOWN or SUPPORTED.
     *
     * @param bitstreamFormat format
     * @return the support level
     */
    public String getSupportLevelText(BitstreamFormat bitstreamFormat);

    /**
     * Set the support level for this bitstream format - one of
     * UNKNOWN,KNOWN or SUPPORTED.
     *
     * @param bitstreamFormat format
     * @param supportLevel    the new support level
     */
    public void setSupportLevel(BitstreamFormat bitstreamFormat, int supportLevel);

    /**
     * If you know the support level string, look up the corresponding type ID
     * constant.
     *
     * @param supportLevel String with the name of the action (must be exact match)
     * @return the corresponding action ID, or -1 if the action
     * string is unknown
     */
    public int getSupportLevelID(String supportLevel);

    /**
     * Attempt to identify the format of a particular bitstream. If the format
     * is unknown, null is returned.
     *
     * @param context   context
     * @param bitstream the bitstream to identify the format of
     * @return a format from the bitstream format registry, or null
     * @throws SQLException if database error
     */
    public BitstreamFormat guessFormat(Context context, Bitstream bitstream) throws SQLException;
}