org.hsqldb.jdbc.JDBCColumnMetaData Maven / Gradle / Ivy
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/* Copyright (c) 2001-2019, 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;
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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)
* @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. */
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 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 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.
*
* @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();
}
}