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package org.hsqldb.jdbc;

import java.lang.reflect.Field;

// fredt@users - 1.9.0 rewritten as simple structure derived from JDBCResultSetMetaData

Provides a site for holding the ResultSetMetaData for individual ResultSet
columns. In 2.0 it is implemented as a simple data structure derived
from calls to JDBCResultSetMetaData methods.
purposes.

Author:
Campbell Burnet (campbell-burnet@users dot sourceforge.net), Fred Toussi (fredt@users dot sourceforge.net)
Version:
2.0
Since:
HSQLDB 1.7.2/**
 * Provides a site for holding the ResultSetMetaData for individual ResultSet
 * columns. In 2.0 it is implemented as a simple data structure derived
 * from calls to JDBCResultSetMetaData methods.
 * purposes.<p>
 *
 * @author Campbell Burnet (campbell-burnet@users dot sourceforge.net)
 * @author Fred Toussi (fredt@users dot sourceforge.net)
 * @version 2.0
 * @since HSQLDB 1.7.2
 */
public final class JDBCColumnMetaData {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        StringBuilder sb;
        Field[]       fields;
        Field         field;

        sb = new StringBuilder();

        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();
    }
}