xref: /trunk/main/offapi/com/sun/star/sdbc/XBlob.idl (revision ffd38472365e95f6a578737bc9a5eb0fac624a86)

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 *
 * 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
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 * KIND, either express or implied.  See the License for the
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#ifndef __com_sun_star_sdbc_XBlob_idl__
#define __com_sun_star_sdbc_XBlob_idl__

#ifndef __com_sun_star_uno_XInterface_idl__
#include <com/sun/star/uno/XInterface.idl>
#endif

 module com {  module sun {  module star {  module io {
 published interface XInputStream;
};};};};

#ifndef __com_sun_star_sdbc_SQLException_idl__
#include <com/sun/star/sdbc/SQLException.idl>
#endif

 module com {  module sun {  module star {  module sdbc {


/** is the representation (mapping) of an SQL
    <i>
    BLOB
    </i>
    .

    <p>
    A SQL
    <i>
    BLOB
    </i>
    is a built-in type that stores a
    Binary Large Object as a column value in a row of a database table.
    The driver implements
    <i>
    BLOB
    </i>
    using a
    SQL
    <code>locator(BLOB)</code>
    , which means that a
    <code>Blob</code>
    object contains a logical pointer to the SQL
    <i>
    BLOB
    </i>
    data rather than the data itself.
    <br/>
    A
    <code>Blob</code>
    object is valid for the duration of the transaction in which is was created.

    </p>
    <p>
    Methods in the interfaces
    <type scope="com::sun::star::sdbc">XResultSet</type>
    ,
    and
    <type scope="com::sun::star::sdbc">XPreparedStatement</type>
    , such as
    <code>getBlob</code>
    and
    <code>setBlob</code>
    allow a programmer to access the SQL
    <i>
    BLOB
    </i>
    .
    <br/>
    The
    <code>Blob</code>
    interface provides methods for getting the length of a SQL
    <i>
    BLOB
    </i>
    (Binary Large Object) value, for materializing a
    <i>
    BLOB
    </i>
    value on the client and for determining the position of a pattern of bytes within a
    <i>
    BLOB
    </i>
    value.
    </p>
 */
published interface XBlob: com::sun::star::uno::XInterface
{
    //-------------------------------------------------------------------------

    /** returns the number of bytes in the
        <i>
        BLOB
        </i>
        value
        designated by this
        <code>Blob</code>
        object.
        @returns
            the length
        @throws SQLException
            if a database access error occurs.
     */
    hyper length() raises (SQLException);

    //-------------------------------------------------------------------------

    /** returns as an array of bytes part or all of the
            <i>
            BLOB
            </i>
             value that this
             <code>Blob</code>
             object designates.  The byte
             array contains up to
             <code>length</code>
             consecutive bytes
             starting at position
             <code>pos</code>.
             @param pos
                is the ordinal position of the first byte in the
                <i>
                BLOB
                </i>
                value to be extracted; the first byte is at
                position 1.
             @param length
                is the number of consecutive bytes to be copied.
             @returns
                a byte array containing up to
                <code>length</code>
                consecutive bytes from the
                <i>
                BLOB
                </i>
                value designated
                by this
                <code>Blob</code>
                object, starting with the byte at position
                <code>pos</code>
                .
             @throws SQLException
                if there is an error accessing the
                <i>
                BLOB
                </i>
                .
     */
    sequence<byte> getBytes([in]hyper pos, [in]long length)
        raises (SQLException);

    //-------------------------------------------------------------------------

    /** retrieves the
        <i>
        BLOB
        </i>
        designated by this
        <code>Blob</code>
        instance as a stream.
        @returns
            the stream
        @throws SQLException
            if a database access error occurs.
     */
    com::sun::star::io::XInputStream getBinaryStream()
        raises (SQLException);
    //-------------------------------------------------------------------------

    /** determines the byte position at which the specified byte
        <code>pattern</code>
        begins within the
        <i>
        BLOB
        </i>
        value that this
        <code>Blob</code>
        object represents.  The
        search for
        <code>pattern</code>
        begins at position
        <code>start</code>
        .
        @param pattern
            the pattern to search
        @returns
            the position
        @throws SQLException
            if a database access error occurs.
     */
    hyper position([in]sequence<byte> pattern, [in]hyper start)
        raises (SQLException);

    //-------------------------------------------------------------------------

    /** determines the byte position in the
        <i>
        BLOB
        </i>
        value
        designated by this
        <code>Blob</code>
        object at which
        <code>pattern</code>
        begins. The search begins at position
        <code>start</code>
        .
        @param pattern
            the pattern to search
        @param start
            position to start
        @returns
            the position
        @throws SQLException
            if a database access error occurs.
     */
    hyper positionOfBlob([in]XBlob pattern,[in] hyper start)
        raises (SQLException);
};

//=============================================================================

}; }; }; };

/*===========================================================================
===========================================================================*/
#endif