com.mysql.cj.protocol.ColumnDefinition Maven / Gradle / Ivy

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JDBC Type 4 driver for MySQL
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/*
 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, version 2.0, as published by the
 * Free Software Foundation.
 *
 * This program is also distributed with certain software (including but not
 * limited to OpenSSL) that is licensed under separate terms, as designated in a
 * particular file or component or in included license documentation. The
 * authors of MySQL hereby grant you an additional permission to link the
 * program and your derivative works with the separately licensed software that
 * they have included with MySQL.
 *
 * Without limiting anything contained in the foregoing, this file, which is
 * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
 * version 1.0, a copy of which can be found at
 * http://oss.oracle.com/licenses/universal-foss-exception.
 *
 * 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 GNU General Public License, version 2.0,
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
 */

package com.mysql.cj.protocol;

import java.util.Map;

import com.mysql.cj.result.Field;

/**
 * Represents protocol specific result set metadata,
 * eg., for native protocol, Protocol::ColumnDefinition41 protocol entity.
 *
 */
public interface ColumnDefinition extends ProtocolEntity {

    Field[] getFields();

    void setFields(Field[] fields);

    /**
     * Builds a hash between column names and their indices for fast retrieval.
     * This is done lazily to support findColumn() and get*(String), as it
     * can be more expensive than just retrieving result set values by ordinal
     * index.
     */
    void buildIndexMapping();

    boolean hasBuiltIndexMapping();

    public Map getColumnLabelToIndex();

    void setColumnLabelToIndex(Map columnLabelToIndex);

    public Map getFullColumnNameToIndex();

    void setFullColumnNameToIndex(Map fullColNameToIndex);

    public Map getColumnNameToIndex();

    void setColumnNameToIndex(Map colNameToIndex);

    public Map getColumnToIndexCache();

    public void setColumnToIndexCache(Map columnToIndexCache);

    void initializeFrom(ColumnDefinition columnDefinition);

    void exportTo(ColumnDefinition columnDefinition);

    int findColumn(String columnName, boolean useColumnNamesInFindColumn, int indexBase);

    /**
     * Check if fields with type BLOB, MEDIUMBLOB, LONGBLOB, TEXT, MEDIUMTEXT or LONGTEXT exist in this ColumnDefinition.
     * 
     * @return true if fields with type BLOB, MEDIUMBLOB, LONGBLOB, TEXT, MEDIUMTEXT or LONGTEXT exist in this ColumnDefinition.
     */
    boolean hasLargeFields();
}