Quadcap Embeddable Database

com/quadcap/sql/meta/MetaTypes.java

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package com.quadcap.sql.meta;

/* Copyright 1999 - 2003 Quadcap Software.  All rights reserved.
 *
 * This software is distributed under the Quadcap Free Software License.
 * This software may be used or modified for any purpose, personal or
 * commercial.  Open Source redistributions are permitted.  Commercial
 * redistribution of larger works derived from, or works which bundle
 * this software requires a "Commercial Redistribution License"; see
 * http://www.quadcap.com/purchase.
 *
 * Redistributions qualify as "Open Source" under  one of the following terms:
 *   
 *    Redistributions are made at no charge beyond the reasonable cost of
 *    materials and delivery.
 *
 *    Redistributions are accompanied by a copy of the Source Code or by an
 *    irrevocable offer to provide a copy of the Source Code for up to three
 *    years at the cost of materials and delivery.  Such redistributions
 *    must allow further use, modification, and redistribution of the Source
 *    Code under substantially the same terms as this license.
 *
 * Redistributions of source code must retain the copyright notices as they
 * appear in each source code file, these license terms, and the
 * disclaimer/limitation of liability set forth as paragraph 6 below.
 *
 * Redistributions in binary form must reproduce this Copyright Notice,
 * these license terms, and the disclaimer/limitation of liability set
 * forth as paragraph 6 below, in the documentation and/or other materials
 * provided with the distribution.
 *
 * The Software is provided on an "AS IS" basis.  No warranty is
 * provided that the Software is free of defects, or fit for a
 * particular purpose.  
 *
 * Limitation of Liability. Quadcap Software shall not be liable
 * for any damages suffered by the Licensee or any third party resulting
 * from use of the Software.
 */

import java.io.IOException;

import java.util.Vector;

import java.sql.DatabaseMetaData;
import java.sql.SQLException;
import java.sql.Types;

import com.quadcap.sql.Column;
import com.quadcap.sql.Row;
import com.quadcap.sql.Session;

import com.quadcap.sql.index.Btree;
import com.quadcap.sql.index.BCursor;

import com.quadcap.sql.types.*;

import com.quadcap.util.Debug;

/**
 * A Cursor supporting the <code>getTypes</code> function.
 *
 * @author Stan Bailes
 */
public class MetaTypes extends MetaCursor {
    static Column[] cols = {
        new Column("TYPE_NAME", typeString),                    // 1
        new Column("DATA_TYPE", typeShort),                     // 2
        new Column("PRECISION", typeInt),                       // 3
        new Column("LITERAL_PREFIX", typeString),               // 4
        new Column("LITERAL_SUFFIX", typeString),               // 5
        new Column("CREATE_PARAMS", typeString),                // 6
        new Column("NULLABLE", typeShort),                      // 7
        new Column("CASE_SENSITIVE", typeBinary),               // 8
        new Column("SEARCHABLE", typeShort),                    // 9
        new Column("UNSIGNED_ATTRIBUTE", typeBinary),           // 10
        new Column("FIXED_PREC_SCALE", typeBinary),             // 11
        new Column("AUTO_INCREMENT", typeBinary),               // 12
        new Column("LOCAL_TYPE_NAME", typeString),              // 13
        new Column("MINIMUM_SCALE", typeShort),                 // 14
        new Column("MAXIMUM_SCALE", typeShort),                 // 15
        new Column("SQL_DATA_TYPE", typeInt),                   // 16
        new Column("SQL_DATETIME_SUB", typeInt),                // 17
        new Column("NUM_PREC_RADIX", typeInt),                  // 18
    };

    static Type[] types = {
        TypeBigInt.typeBigInt,
        TypeBinary.typeBinary,
        TypeBoolean.typeBoolean,
        TypeBlob.typeBlob,
        TypeChar.typeChar,
        TypeClob.typeClob,
        TypeDate.typeDate,
        TypeDecimal.typeDecimal,
        TypeInt.typeInt,
        TypeInterval.typeInterval,
        TypeReal.typeDouble,
        TypeReal.typeFloat,
        TypeReal.typeReal,
        TypeSmallInt.typeSmallInt,
        TypeTime.typeTime,
        TypeTimestamp.typeTimestamp,
        TypeTinyInt.typeTinyInt,
        TypeVarBinary.typeVarBinary,
        TypeVarChar.typeVarChar,
    };

    static int[] sortColumns = { 2 };

    /**
     * Cursor constructor.  We're just a static repository of types
     */
    public MetaTypes(Session session)
        throws SQLException
    {
        super(session, null);
        try {
            addColumns(cols);
            for (int i = 0; i < types.length; i++) {
                addType(types[i]);
            }
            sort();
        } catch (ValueException e) {
            SQLException te = new SQLException(e.toString(), "Q000R");
            te.setNextException(e);
            throw te;
        }           
    }

    /**
     * Sort by type
     */
    public int[] getSortColumns() {
        return sortColumns;
    }    

    /**
     * Helper to build a row for the resultset
     */
    void addType(Type type) throws SQLException {
        Row row = new Row(18);
        row.set(1, new ValueString(type.getTypeName()));
        Value dataType = new ValueShort(type.getJDBCType());
        row.set(2, dataType);
        row.set(3, new ValueInteger(type.getMaxPrecision()));
        if (type.isCharType()) {
            row.set(4, new ValueString("'"));
            row.set(5, new ValueString("'"));
        } else {
            row.set(4, ValueNull.valueNull);
            row.set(5, ValueNull.valueNull);
        }
        row.set(6, new ValueString(type.getCreateParams()));
        row.set(7, new ValueShort(DatabaseMetaData.typeNullable));
        row.set(8, ValueBoolean.trueBoolean);
        row.set(9, new ValueShort(DatabaseMetaData.typeSearchable));
        row.set(10, new ValueBoolean(!type.isSigned()));

        row.set(11, new ValueBoolean(type.isCurrency()));
        row.set(12, new ValueBoolean(false));
        row.set(13, ValueNull.valueNull);
        row.set(14, new ValueShort(type.getMinScale()));
        row.set(15, new ValueShort(type.getMaxScale()));
        row.set(16, ValueNull.valueNull);
        row.set(17, ValueNull.valueNull);
        row.set(18, new ValueInteger(10));
        addRow(row);
    }
}