Source Code Cross Referenced for AxionResultSetMetaData.java in  » Database-DBMS » axion » org » axiondb » jdbc » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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


001:        /*
002:         * $Id: AxionResultSetMetaData.java,v 1.8 2007/11/13 19:04:01 rwald Exp $
003:         * =======================================================================
004:         * Copyright (c) 2002-2005 Axion Development Team.  All rights reserved.
005:         *
006:         * Redistribution and use in source and binary forms, with or without
007:         * modification, are permitted provided that the following conditions
008:         * are met:
009:         *
010:         * 1. Redistributions of source code must retain the above
011:         *    copyright notice, this list of conditions and the following
012:         *    disclaimer.
013:         *
014:         * 2. Redistributions in binary form must reproduce the above copyright
015:         *    notice, this list of conditions and the following disclaimer in
016:         *    the documentation and/or other materials provided with the
017:         *    distribution.
018:         *
019:         * 3. The names "Tigris", "Axion", nor the names of its contributors may
020:         *    not be used to endorse or promote products derived from this
021:         *    software without specific prior written permission.
022:         *
023:         * 4. Products derived from this software may not be called "Axion", nor
024:         *    may "Tigris" or "Axion" appear in their names without specific prior
025:         *    written permission.
026:         *
027:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
028:         * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
029:         * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
030:         * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
031:         * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
032:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
033:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
034:         * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
035:         * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
036:         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
037:         * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
038:         * =======================================================================
039:         */
040:
041:        package org.axiondb.jdbc;
042:
043:        import java.sql.DatabaseMetaData;
044:        import java.sql.ResultSetMetaData;
045:        import java.sql.SQLException;
046:
047:        import org.axiondb.ColumnIdentifier;
048:        import org.axiondb.DataType;
049:        import org.axiondb.Selectable;
050:
051:        /**
052:         * A {@link ResultSetMetaData}implementation.
053:         * 
054:         * @version $Revision: 1.8 $ $Date: 2007/11/13 19:04:01 $
055:         * @author Chuck Burdick
056:         * @author Rodney Waldhoff
057:         */
058:        public class AxionResultSetMetaData implements  ResultSetMetaData {
059:
060:            public AxionResultSetMetaData(Selectable[] selected) {
061:                _sels = selected;
062:            }
063:
064:            public String getCatalogName(int column) throws SQLException {
065:                checkColumnIndex(column);
066:                // per JDBC API Tutorial and Reference (pg 668)
067:                // return "" if not applicable
068:                return "";
069:            }
070:
071:            public int getColumnCount() throws SQLException {
072:                return _sels.length;
073:            }
074:
075:            public String getColumnClassName(int column) throws SQLException {
076:                return getDataType(column).getPreferredValueClassName();
077:            }
078:
079:            public int getColumnDisplaySize(int column) throws SQLException {
080:                return getDataType(column).getColumnDisplaySize();
081:            }
082:
083:            public String getColumnLabel(int column) throws SQLException {
084:                return getSelectable(column).getLabel();
085:            }
086:
087:            public String getColumnName(int column) throws SQLException {
088:                return getSelectable(column).getName();
089:            }
090:
091:            public int getColumnType(int column) throws SQLException {
092:                return getDataType(column).getJdbcType();
093:            }
094:
095:            public String getColumnTypeName(int column) throws SQLException {
096:                return getDataType(column).getClass().getName();
097:            }
098:
099:            public int getPrecision(int column) throws SQLException {
100:                DataType type = getDataType(column);
101:                if (type instanceof  DataType.BinaryRepresentation) {
102:
103:                }
104:                return type.getPrecision();
105:            }
106:
107:            public int getScale(int column) throws SQLException {
108:                return getDataType(column).getScale();
109:            }
110:
111:            public String getSchemaName(int column) throws SQLException {
112:                checkColumnIndex(column);
113:                // per JDBC API Tutorial and Reference (pg 673)
114:                // return "" if not applicable
115:                return "";
116:            }
117:
118:            public String getTableName(int column) throws SQLException {
119:                checkColumnIndex(column);
120:                String val = null;
121:                Selectable sel = getSelectable(column);
122:                if (sel instanceof  ColumnIdentifier) {
123:                    val = ((ColumnIdentifier) (sel)).getTableName();
124:                }
125:                if (null == val) {
126:                    return ""; // per JDBC API Tutorial and Reference (pg 673)
127:                }
128:                return val;
129:            }
130:
131:            public boolean isAutoIncrement(int column) throws SQLException {
132:                checkColumnIndex(column);
133:                return false;
134:            }
135:
136:            public boolean isCaseSensitive(int column) throws SQLException {
137:                return getDataType(column).isCaseSensitive();
138:            }
139:
140:            public boolean isCurrency(int column) throws SQLException {
141:                return getDataType(column).isCurrency();
142:            }
143:
144:            public int isNullable(int column) throws SQLException {
145:                return getDataType(column).getNullableCode();
146:            }
147:
148:            public boolean isSearchable(int column) throws SQLException {
149:                return getDataType(column).getSearchableCode() != DatabaseMetaData.typePredNone;
150:            }
151:
152:            public boolean isSigned(int column) throws SQLException {
153:                return !(getDataType(column).isUnsigned());
154:            }
155:
156:            public boolean isReadOnly(int column) throws SQLException {
157:                return !(isWritable(column)); // ???
158:            }
159:
160:            public boolean isWritable(int column) throws SQLException {
161:                return true; // ???
162:            }
163:
164:            public boolean isDefinitelyWritable(int column) throws SQLException {
165:                checkColumnIndex(column);
166:                return false; // ???
167:            }
168:
169:            private DataType getDataType(int column) throws SQLException {
170:                DataType type = getSelectable(column).getDataType();
171:                if (null != type) {
172:                    return type;
173:                }
174:                throw new SQLException(
175:                        "Unable to determine the type of column " + column);
176:            }
177:
178:            private Selectable getSelectable(int column) throws SQLException {
179:                checkColumnIndex(column);
180:                Selectable sel = _sels[column - 1];
181:                if (null != sel) {
182:                    return sel;
183:                }
184:                throw new SQLException("Unable to access column " + column);
185:            }
186:
187:            private void checkColumnIndex(int column) throws SQLException {
188:                if (column - 1 < 0 || column - 1 >= _sels.length) {
189:                    throw new SQLException("Index " + column
190:                            + " is out of bounds.");
191:                }
192:            }
193:
194:            private Selectable[] _sels = null;
195:
196:            @Override
197:            public boolean isWrapperFor(Class<?> arg0) throws SQLException {
198:                throw new SQLException("Not supported");
199:            }
200:
201:            @Override
202:            public <T> T unwrap(Class<T> arg0) throws SQLException {
203:                throw new SQLException("Not supported");
204:            }
205:        }
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