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HSQLDB example source code file (jdbcColumnMetaData.java)

This example HSQLDB source code file (jdbcColumnMetaData.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - HSQLDB tags/keywords

exception, exception, field, field, reflection, string, string, stringbuffer, stringbuffer

The HSQLDB jdbcColumnMetaData.java source code

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.jdbc;

import java.lang.reflect.Field;

/**
 * Provides a site for holding the ResultSetMetaData for individual ResultSet
 * columns. <p>
 *
 * @author boucherb@users
 * @version 1.7.2
 * @since HSQLDB 1.7.2
 */
public final class jdbcColumnMetaData {

    /** The column's table's catalog name. */
    public String catalogName;

    /**
     * The fully-qualified name of the Java class whose instances are
     * manufactured if the method ResultSet.getObject is called to retrieve
     * a value from the column.
     */
    public String columnClassName;

    /** The column's normal max width in chars. */
    public int columnDisplaySize;

    /** The suggested column title for use in printouts and displays. */
    public String columnLabel;

    /** The column's name. */
    public String columnName;

    /** The column's SQL type. */
    public int columnType;

    /** The column's database-specific type name. */
    public String columnTypeName;

    /** The column's value's number of decimal digits. */
    public int precision;

    /** The column's value's number of digits to right of the decimal point. */
    public int scale;

    /** The column's table's schema. */
    public String schemaName;

    /** The column's table's name. */
    public String tableName;

    /** Whether the value of the column are automatically numbered. */
    public boolean isAutoIncrement;

    /** Whether the column's value's case matters. */
    public boolean isCaseSensitive;

    /** Whether the values in the column are cash values. */
    public boolean isCurrency;

    /** Whether a write on the column will definitely succeed. */
    public boolean isDefinitelyWritable;

    /** The nullability of values in the column. */
    public int isNullable;

    /** Whether the column's values are definitely not writable. */
    public boolean isReadOnly;

    /** Whether the column's values can be used in a where clause. */
    public boolean isSearchable;

    /** Whether values in the column are signed numbers. */
    public boolean isSigned;

    /** Whether it is possible for a write on the column to succeed. */
    public boolean isWritable;

    /**
     * Retrieves a String representation of this object.
     *
     * @return a Sring representation of this object
     */
    public String toString() {

        try {
            return toStringImpl();
        } catch (Exception e) {
            return super.toString() + "[" + e + "]";
        }
    }

    /**
     * Provides the implementation of the toString() method.
     *
     * @return a Sring representation of this object
     */
    private String toStringImpl() throws Exception {

        StringBuffer sb;
        Field[]      fields;
        Field        field;

        sb = new StringBuffer();

        sb.append('[');

        fields = getClass().getFields();

        int len = fields.length;

        for (int i = 0; i < len; i++) {
            field = fields[i];

            sb.append(field.getName());
            sb.append('=');
            sb.append(field.get(this));

            if (i + 1 < len) {
                sb.append(',');
                sb.append(' ');
            }
        }

        sb.append(']');

        return sb.toString();
    }
}

Other HSQLDB examples (source code examples)

Here is a short list of links related to this HSQLDB jdbcColumnMetaData.java source code file:

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