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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