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/*
 * Firebird Open Source JDBC Driver
 *
 * Distributable under LGPL license.
 * You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * LGPL License for more details.
 *
 * This file was created by members of the firebird development team.
 * All individual contributions remain the Copyright (C) of those
 * individuals.  Contributors to this file are either listed here or
 * can be obtained from a source control history command.
 *
 * All rights reserved.
 */
package org.firebirdsql.jdbc.field;

import org.firebirdsql.gds.impl.GDSHelper;
import org.firebirdsql.gds.ng.fields.FieldDescriptor;
import org.firebirdsql.jdbc.FBCachedBlob;
import org.firebirdsql.jdbc.FirebirdBlob;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

import java.sql.Clob;
import java.sql.SQLException;

/**
 * Field implementation for blobs other than {@code BLOB SUB_TYPE TEXT} which caches the blob content locally.
 *
 * @author Roman Rokytskyy
 * @author Mark Rotteveel
 */
final class FBCachedBlobField extends FBBlobField {

    @NullMarked
    FBCachedBlobField(FieldDescriptor fieldDescriptor, FieldDataProvider dataProvider, int requiredType,
            @Nullable GDSHelper gdsHelper) throws SQLException {
        super(fieldDescriptor, dataProvider, requiredType, gdsHelper);
    }

    @Override
    protected FirebirdBlob getBlobInternal() {
        if (blob != null) return blob;
        final byte[] bytes = getFieldData();
        if (bytes == null) return null;
        blob = new FBCachedBlob(bytes);
        return blob;
    }

    @Override
    public Clob getClob() throws SQLException {
    	if (isNull()) return null;
    	return new FBCachedClob((FBCachedBlob) getBlob(), blobConfig);
    }

    @Override
    public byte[] getBytes() throws SQLException {
        // TODO Looks suspicious compared to the implementation in FBBlobField
        return getFieldData();
    }
}