Source Code Cross Referenced for jdbcColumnMetaData.java in  » Database-DBMS » hsql » org » hsqldb » jdbc » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » hsql » org.hsqldb.jdbc 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* Copyright (c) 2001-2005, The HSQL Development Group
002:         * All rights reserved.
003:         *
004:         * Redistribution and use in source and binary forms, with or without
005:         * modification, are permitted provided that the following conditions are met:
006:         *
007:         * Redistributions of source code must retain the above copyright notice, this
008:         * list of conditions and the following disclaimer.
009:         *
010:         * Redistributions in binary form must reproduce the above copyright notice,
011:         * this list of conditions and the following disclaimer in the documentation
012:         * and/or other materials provided with the distribution.
013:         *
014:         * Neither the name of the HSQL Development Group nor the names of its
015:         * contributors may be used to endorse or promote products derived from this
016:         * software without specific prior written permission.
017:         *
018:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019:         * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020:         * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021:         * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
022:         * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
023:         * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
024:         * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025:         * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
026:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027:         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028:         * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029:         */
030:
031:        package org.hsqldb.jdbc;
032:
033:        import java.lang.reflect.Field;
034:
035:        /**
036:         * Provides a site for holding the ResultSetMetaData for individual ResultSet
037:         * columns. <p>
038:         *
039:         * @author boucherb@users
040:         * @version 1.7.2
041:         * @since HSQLDB 1.7.2
042:         */
043:        public final class jdbcColumnMetaData {
044:
045:            /** The column's table's catalog name. */
046:            public String catalogName;
047:
048:            /**
049:             * The fully-qualified name of the Java class whose instances are
050:             * manufactured if the method ResultSet.getObject is called to retrieve
051:             * a value from the column.
052:             */
053:            public String columnClassName;
054:
055:            /** The column's normal max width in chars. */
056:            public int columnDisplaySize;
057:
058:            /** The suggested column title for use in printouts and displays. */
059:            public String columnLabel;
060:
061:            /** The column's name. */
062:            public String columnName;
063:
064:            /** The column's SQL type. */
065:            public int columnType;
066:
067:            /** The column's database-specific type name. */
068:            public String columnTypeName;
069:
070:            /** The column's value's number of decimal digits. */
071:            public int precision;
072:
073:            /** The column's value's number of digits to right of the decimal point. */
074:            public int scale;
075:
076:            /** The column's table's schema. */
077:            public String schemaName;
078:
079:            /** The column's table's name. */
080:            public String tableName;
081:
082:            /** Whether the value of the column are automatically numbered. */
083:            public boolean isAutoIncrement;
084:
085:            /** Whether the column's value's case matters. */
086:            public boolean isCaseSensitive;
087:
088:            /** Whether the values in the column are cash values. */
089:            public boolean isCurrency;
090:
091:            /** Whether a write on the column will definitely succeed. */
092:            public boolean isDefinitelyWritable;
093:
094:            /** The nullability of values in the column. */
095:            public int isNullable;
096:
097:            /** Whether the column's values are definitely not writable. */
098:            public boolean isReadOnly;
099:
100:            /** Whether the column's values can be used in a where clause. */
101:            public boolean isSearchable;
102:
103:            /** Whether values in the column are signed numbers. */
104:            public boolean isSigned;
105:
106:            /** Whether it is possible for a write on the column to succeed. */
107:            public boolean isWritable;
108:
109:            /**
110:             * Retrieves a String representation of this object.
111:             *
112:             * @return a Sring representation of this object
113:             */
114:            public String toString() {
115:
116:                try {
117:                    return toStringImpl();
118:                } catch (Exception e) {
119:                    return super .toString() + "[" + e + "]";
120:                }
121:            }
122:
123:            /**
124:             * Provides the implementation of the toString() method.
125:             *
126:             * @return a Sring representation of this object
127:             */
128:            private String toStringImpl() throws Exception {
129:
130:                StringBuffer sb;
131:                Field[] fields;
132:                Field field;
133:
134:                sb = new StringBuffer();
135:
136:                sb.append('[');
137:
138:                fields = getClass().getFields();
139:
140:                int len = fields.length;
141:
142:                for (int i = 0; i < len; i++) {
143:                    field = fields[i];
144:
145:                    sb.append(field.getName());
146:                    sb.append('=');
147:                    sb.append(field.get(this ));
148:
149:                    if (i + 1 < len) {
150:                        sb.append(',');
151:                        sb.append(' ');
152:                    }
153:                }
154:
155:                sb.append(']');
156:
157:                return sb.toString();
158:            }
159:        }
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