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[phpeclipse.git] / archive / net.sourceforge.phpeclipse.quantum.sql / src / com / quantum / sql / MultiSQLServer.java
1 package com.quantum.sql;
2
3 import java.io.ByteArrayOutputStream;
4 import java.io.InputStream;
5 import java.io.Reader;
6 import java.io.UnsupportedEncodingException;
7 import java.sql.Connection;
8 import java.sql.DatabaseMetaData;
9 import java.sql.Driver;
10 import java.sql.ResultSet;
11 import java.sql.ResultSetMetaData;
12 import java.sql.SQLException;
13 import java.sql.Statement;
14 import java.util.Properties;
15 import java.util.Vector;
16
17 import com.quantum.model.Bookmark;
18 import com.quantum.model.ConnectionException;
19 import com.quantum.model.Entity;
20 import com.quantum.model.JDBCDriver;
21 import com.quantum.model.PasswordFinder;
22 import com.quantum.sql.metadata.MetaDataJDBCInterface;
23 import com.quantum.sql.metadata.ObjectMetaData;
24 import com.quantum.view.LogProxy;
25 import com.quantum.view.bookmark.EntityNode;
26 import com.quantum.view.bookmark.TreeNode;
27
28
29 /**
30  * MultiSQLServer is a Singleton, used  as a interface with the sql drivers.
31  * Use MultiSQLServer.getInstance() to get the object.
32  */
33 public class MultiSQLServer implements ConnectionEstablisher {
34     private static final int STREAM = 1024 * 2;
35     public static final String USERNAME = "user"; //$NON-NLS-1$
36     public static final String PASSWORD = "password"; //$NON-NLS-1$
37     private static MultiSQLServer instance = null;
38     boolean running = true;
39
40     private MultiSQLServer() {
41     }
42     public synchronized static MultiSQLServer getInstance() {
43         if (instance == null) {
44             instance = new MultiSQLServer();
45         }
46         return instance;
47     }
48
49     public void commit(Connection con) {
50         LogProxy log = LogProxy.getInstance();
51         try {
52             con.commit();
53         } catch (SQLException e) {
54             log.addText(LogProxy.ERROR, "Error commiting: " + e, e); //$NON-NLS-1$
55         }
56     }
57
58     public void rollback(Connection con) {
59         LogProxy log = LogProxy.getInstance();
60         try {
61             con.rollback();
62         } catch (SQLException e) {
63             log.addText(LogProxy.ERROR, "Error rolling back: " + e, e); //$NON-NLS-1$
64         }
65     }
66
67     public void setAutoCommit(Connection con, boolean enabled) {
68         LogProxy log = LogProxy.getInstance();
69         try {
70             if (con != null) {
71                 con.setAutoCommit(enabled);
72             } else {
73                 log.addText(LogProxy.ERROR, "Please connect before setting autocommit"); //$NON-NLS-1$
74             }
75         } catch (SQLException e) {
76             log.addText(LogProxy.ERROR, "Error setting autocommit: " + e, e); //$NON-NLS-1$
77         }
78     }
79
80     public void disconnect(Connection connection) throws ConnectionException {
81         try {
82             if (connection != null) {
83                 connection.close();
84             }
85         } catch (SQLException e) {
86             throw new ConnectionException(e);
87         }
88     }
89
90     /**
91      * Makes a connection to a JDBC driver based on the data from a bookmark
92      * @param bookmark - 
93      *     The Bookmark with the data needed to make the connection
94      * @param passwordFinder - 
95      *     A utility class that can be invoked if the bookmark does not 
96      *     include a password
97      * @return The Connection object if everything went OK
98      */
99     public Connection connect(Bookmark bookmark, PasswordFinder passwordFinder)
100         throws ConnectionException {
101
102         String password = bookmark.getPassword();
103         if (bookmark.getPromptForPassword()) {
104             password = passwordFinder.getPassword();
105             if (passwordFinder.isPasswordMeantToBeSaved()) {
106                 bookmark.setPassword(password);
107             }
108         }
109         
110         if (password != null) {
111             Connection connection = connect(bookmark, password);
112             if (connection != null) {
113                         // Set the autoCommit state of the bookmark to the default on new connections
114                                 bookmark.setAutoCommit(bookmark.getDefaultAutoCommit());
115                                 // Set the autoCommit state of the JDBC connection to the bookmark autoCommit statec
116                         setAutoCommit(connection, bookmark.isAutoCommit());
117             }
118                 return connection;
119         } else {
120             return null;
121         }
122         
123     }
124     private Connection connect(Bookmark bookmark, String password)
125         throws ConnectionException {
126         LogProxy log = LogProxy.getInstance();
127         log.addText(LogProxy.QUERY, "Connecting to: " + bookmark.getName()); //$NON-NLS-1$
128         try {
129                 JDBCDriver jdbcDriver = bookmark.getJDBCDriver();
130             Driver driver = jdbcDriver.getDriver();
131             Connection connection = null;
132             if (driver != null) {
133                     Properties props = new Properties();
134                     props.put(USERNAME, bookmark.getUsername());
135                     props.put(PASSWORD, password);
136                     connection =
137                         driver.connect(bookmark.getConnect(), props);
138                     if (connection == null) {
139                         throw new ConnectionException("Error: Driver returned a null connection: " + bookmark.toString()); //$NON-NLS-1$
140                     }
141                     
142                     DatabaseMetaData metaData = connection.getMetaData();
143                     jdbcDriver.setName(metaData.getDriverName());
144                     jdbcDriver.setVersion(metaData.getDriverVersion());
145                     log.addText(LogProxy.RESULTS, "Connected to: " + bookmark.getName()); //$NON-NLS-1$
146                     System.out.println("Connected"); //$NON-NLS-1$
147             }
148             return connection;
149         } catch (SQLException e) {
150             throw new ConnectionException(e);
151         }
152     }
153         public SQLResults execute(Connection con, String s) throws SQLException {
154                 return execute(con, s, -1, -1);
155         }
156         public SQLResults execute(Connection con, String s, int startRow, int endRow) throws SQLException {
157                 return execute(con, s, -1, -1, Integer.MAX_VALUE);
158         }
159
160         public SQLResults execute(Connection con, String s, int startRow, int endRow, int maxLength) throws SQLException {
161                 return execute(con, s, startRow, endRow, maxLength, ""); //$NON-NLS-1$
162         }
163         
164         public SQLResults execute(
165                 Connection con,
166                 String s,
167                 int startRow,
168                 int endRow,
169                 int maxLength,
170                 String encoding)
171                 throws SQLException {
172
173                 SQLResults results = new SQLResults();
174
175                 long startTime = System.currentTimeMillis();
176                 System.out.println("Executing"); //$NON-NLS-1$
177                 LogProxy log = LogProxy.getInstance();
178                 log.addText(LogProxy.QUERY, "Executing Request [" + s + "]"); //$NON-NLS-1$ //$NON-NLS-2$
179                 boolean metadata = false;
180                 if (s.startsWith("METADATA")) { //$NON-NLS-1$
181                         metadata = true;
182                 }
183                 if (metadata) {
184                         results.setQuery(s);
185                         String table = s.substring(s.indexOf(':') + 1);
186                         String query = "SELECT * FROM " + table + " WHERE (1 = 0)"; //$NON-NLS-1$ //$NON-NLS-2$
187                         s = query;
188                         log.addText(LogProxy.QUERY, "Metadata Request [" + s + "]"); //$NON-NLS-1$ //$NON-NLS-2$
189                 } else {
190                         results.setQuery(s);
191                 }
192
193                 Statement stmt = con.createStatement();
194                 boolean flag = stmt.execute(s);
195                 results.setResultSet(flag);
196                 if (metadata) {
197                         genMetadataResultSet(results, stmt);
198                         return results;
199                 }
200                 if (!flag) {
201                         int updates = stmt.getUpdateCount();
202                         results.setUpdateCount(updates);
203                         log.addText(LogProxy.RESULTS, "Success: " + updates + " records updated"); //$NON-NLS-1$ //$NON-NLS-2$
204
205                 } else {
206                         ResultSet set = stmt.getResultSet();
207                         ResultSetMetaData metaData = set.getMetaData();
208                         int columnCount = metaData.getColumnCount();
209                         Vector columnNames = new Vector();
210                         for (int i = 1; i <= columnCount; i++) {
211                                 columnNames.addElement(metaData.getColumnName(i));
212                         }
213                         results.setColumnNames(columnNames);
214                         Vector columnTypes = new Vector();
215                         for (int i = 1; i <= columnCount; i++) {
216                                 columnTypes.addElement(metaData.getColumnTypeName(i));
217                         }
218                         results.setColumnTypes(columnTypes);
219                         int columnSizes[] = new int[columnCount];
220                         for (int i = 1; i <= columnCount; i++) {
221                                 columnSizes[i - 1] = metaData.getColumnDisplaySize(i);
222                         }
223                         int rowCount = 1;
224                         boolean exitEarly = false;
225                         while (set.next()) {
226                                 boolean disable = startRow < 1 || endRow < 1;
227                                 boolean start = rowCount >= startRow;
228                                 boolean end = rowCount <= endRow;
229                                 if (disable || (start && end)) {
230                                         Vector row = new Vector();
231                                         for (int i = 1; i <= columnCount; i++) {
232                                                 String value;
233                                                 if (columnSizes[i - 1] < STREAM
234                                                         && columnSizes[i - 1] < maxLength) {
235                                                         if (encoding.equals("")) { //$NON-NLS-1$
236                                                                 value = set.getString(i);
237                                                         } else {
238                                                                 try {
239                                                                         value =
240                                                                                 new String(set.getBytes(i), encoding);
241                                                                 } catch (UnsupportedEncodingException e) {
242                                                                         log.addText(LogProxy.ERROR, "Error Unsupported encoding " + encoding.toString() + ":" + e.toString(), e); //$NON-NLS-1$ //$NON-NLS-2$
243                                                                         value = new String(set.getBytes(i));
244                                                                 }
245                                                         }
246                                                 } else {
247                                                         try {
248                                                                 if (encoding.equals("")) { //$NON-NLS-1$
249                                                                         Reader reader = set.getCharacterStream(i);
250                                                                         StringBuffer buffer = new StringBuffer();
251                                                                         if (reader != null) {
252                                                                                 int retVal = reader.read();
253                                                                                 int count = 0;
254                                                                                 while (retVal >= 0) {
255                                                                                         buffer.append((char) retVal);
256                                                                                         retVal = reader.read();
257                                                                                         count++;
258                                                                                         if (count > maxLength) {
259                                                                                                 buffer.append("...>>>"); //$NON-NLS-1$
260                                                                                                 break;
261                                                                                         }
262                                                                                 }
263                                                                                 reader.close();
264                                                                         }
265                                                                         value = buffer.toString();
266                                                                 } else {
267                                                                         InputStream binaryStream =
268                                                                                 set.getBinaryStream(i);
269                                                                         ByteArrayOutputStream baos =
270                                                                                 new ByteArrayOutputStream();
271                                                                         if (binaryStream != null) {
272                                                                                 int retVal = binaryStream.read();
273                                                                                 int count = 0;
274                                                                                 while (retVal >= 0) {
275                                                                                         baos.write(retVal);
276                                                                                         retVal = binaryStream.read();
277                                                                                         count++;
278                                                                                         if (count > maxLength) {
279                                                                                                 break;
280                                                                                         }
281                                                                                 }
282                                                                                 binaryStream.close();
283                                                                         }
284                                                                         value =
285                                                                                 new String(
286                                                                                         baos.toByteArray(),
287                                                                                         encoding);
288                                                                 }
289                                                         } catch (Throwable e) {
290                                                                 // hack for mysql which doesn't implement
291                                                                 // character streams
292                                                                 value = set.getString(i);
293                                                         }
294                                                 }
295                                                 if (set.wasNull()) {
296                                                         row.addElement("<NULL>"); //$NON-NLS-1$
297                                                 } else {
298                                                         row.addElement(value);
299                                                 }
300                                         }
301                                         results.addRow(row);
302                                 }
303                                 rowCount++;
304                                 if (!disable && (rowCount > endRow)) {
305                                         exitEarly = true;
306                                         break;
307                                 }
308                         }
309                         if (exitEarly) {
310                                 results.setHasMore(set.next());
311                         } else {
312                                 results.setMaxSize(rowCount);
313                                 results.setHasMore(false);
314                         }
315                         set.close();
316                 }
317                 log.addText(LogProxy.RESULTS, "Success: result set displayed"); //$NON-NLS-1$
318                 stmt.close();
319                 results.setTime(System.currentTimeMillis() - startTime);
320                 System.out.println("Executed"); //$NON-NLS-1$
321                 System.out.println();
322                 return results;
323         }
324         private void genMetadataResultSet(SQLResults results, Statement stmt)
325                 throws SQLException {
326                 ResultSet set = stmt.getResultSet();
327                 ResultSetMetaData metaData = set.getMetaData();
328                 int columnCount = metaData.getColumnCount();
329                 Vector columnNames = new Vector();
330                 columnNames.addElement("ColumnName"); //$NON-NLS-1$
331                 columnNames.addElement("Type"); //$NON-NLS-1$
332                 columnNames.addElement("Size"); //$NON-NLS-1$
333                 columnNames.addElement("Nullable"); //$NON-NLS-1$
334                 columnNames.addElement("AutoIncrement"); //$NON-NLS-1$
335                 results.setColumnNames(columnNames);
336                 for (int i = 1; i <= columnCount; i++) {
337                         Vector row = new Vector();
338                         row.addElement(metaData.getColumnName(i));
339                         row.addElement(metaData.getColumnTypeName(i));
340                         int textSize = metaData.getColumnDisplaySize(i);
341                         int precision = metaData.getPrecision(i);
342                         int scale = metaData.getScale(i);
343                         if (scale == 0 && precision == 0) {
344                                 row.addElement(Integer.toString(precision));
345                         } else {
346                                 row.addElement(textSize + ", " + precision + ", " + scale); //$NON-NLS-1$ //$NON-NLS-2$
347                         }
348                         int nullable = metaData.isNullable(i);
349                         if (nullable == ResultSetMetaData.columnNoNulls) {
350                                 row.addElement("Not Null"); //$NON-NLS-1$
351                         } else if (nullable == ResultSetMetaData.columnNullable) {
352                                 row.addElement("Nullable"); //$NON-NLS-1$
353                         } else if (
354                                 nullable == ResultSetMetaData.columnNullableUnknown) {
355                                 row.addElement("Nullable"); //$NON-NLS-1$
356                         } else {
357                                 row.addElement("<Error>"); //$NON-NLS-1$
358                         }
359                         row.addElement(
360                                 (metaData.isAutoIncrement(i)
361                                         ? Boolean.TRUE
362                                         : Boolean.FALSE)
363                                         .toString());
364                         results.addRow(row);
365                 }
366                 results.setHasMore(false);
367                 set.close();
368         }
369
370         /**
371          * Returns an ObjectMetadata object got from the connection 'con' using the name and schema of the node.
372          * @param con
373          * @param node
374          * @return
375          * @throws SQLException
376          */
377         public ObjectMetaData getObjectMetadata(Connection con, TreeNode node) throws SQLException {
378                 ObjectMetaData metadata = new ObjectMetaData();
379                 if (!(node instanceof Entity)) return metadata;
380                 
381                 String schema = ((Entity)node).getSchema();
382                 String tableName = node.getName();
383                 
384                 if (schema.length() == 0) schema = null;
385                 metadata.setColumns(MetaDataJDBCInterface.getColumns(con, schema, tableName));
386                 if (node instanceof EntityNode && ((EntityNode) node).isTable()) {
387                         metadata.setPrimaryKeys(MetaDataJDBCInterface.getPrimaryKeys(con, schema, tableName));
388                         metadata.setForeignKeys(MetaDataJDBCInterface.getForeignKeys(con, schema, tableName, true));
389                         metadata.setIndexInfo(MetaDataJDBCInterface.getIndexInfo(con, schema, tableName));
390                         metadata.setBestRowId(MetaDataJDBCInterface.getBestRowId(con, schema, tableName));
391                 }
392                 return metadata;
393         }
394         
395 }