geotools/io/GtDbServerSettings.java

package skrueger.geotools.io;

import java.awt.Component;
import java.net.MalformedURLException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.regex.Pattern;

import org.apache.commons.lang.ArrayUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import org.geotools.data.postgis.PostgisNGDataStoreFactory;
import org.geotools.jdbc.JDBCDataStore;
import org.geotools.jdbc.JDBCDataStoreFactory;
import org.jfree.util.Log;

import schmitzm.swing.BooleanInputOption;
import schmitzm.swing.ManualInputOption;
import schmitzm.swing.ManualInputOption.Integer;
import schmitzm.swing.ManualInputOption.PasswordViewable;
import schmitzm.swing.ManualInputOption.Text;
import schmitzm.swing.MultipleOptionPane;
import schmitzm.swing.SelectionInputOption;
import schmitzm.swing.SelectionInputOption.Combo;
import skrueger.db.PGUtil;

/**
 * This class describes all settings needed to connect to a WFS server. This
 * class extends a {@link HashMap} and contains two groups of keys:<br/>
 * The first group of keys, are all keys provided by Geotools to create a WFS
 * datastore, like: {@link JDBCDataStore#SCHEMA} .<br/>
 * The second group are additional keys defined in the enum
 * {@link GtDbServerSettings.Key}.<br/>
 * This class can serialize all important parameters needed to define the
 * connection into a {@link String} with {@link #toPropertiesString()} and
 * re-import the String with {@link #parsePropertiesString(String)}.
 */
public class GtDbServerSettings extends AbstractGTServerSettings<Object, Object> {

        Logger log = Logger.getLogger(GtDbServerSettings.class);

        public enum DbType {
                postgis("postgresql");

                private final String protocolString;

                DbType(String protocolString) {
                        this.protocolString = protocolString;
                }

                public String getProtocolString() {
                        return protocolString;
                };
        }

        /**
         * params.put(JDBCDataStoreFactory.DBTYPE.key, "postgis");
         * params.put(JDBCDataStoreFactory.HOST.key, host); // the name or ip
         * params.put(JDBCDataStoreFactory.PORT.key, port); // the port that
         * 
         * params.put(JDBCDataStoreFactory.DATABASE.key, database); // the
         * 
         * // name params.put(JDBCDataStoreFactory.USER.key, username); // the user
         * to params.put(JDBCDataStoreFactory.PASSWD.key, password); // the
         * 
         * params.put(JDBCDataStoreFactory.SCHEMA, schema);
         * 
         * params.put(JDBCDataStoreFactory.EXPOSE_PK.key, true); *
         */

        public enum Key {
        }

        private static Connection dbc;

        /**
         * Opens a GUI that asks the use define a DB connection.
         * 
         * @param dbServer
         *            <code>null</code> to create a new instance, or an instance to
         *            edit.
         * @return <code>null</code> if the user cancelled the creation of a new
         *         {@link GtDbServerSettings}, otherwise the edited instance.
         */
        public static GtDbServerSettings createOrEdit(Component owner,
                        GtDbServerSettings dbServer) {
                boolean newCreated = false;

                if (dbServer == null) {
                        newCreated = true;
                        dbServer = new GtDbServerSettings(DbType.postgis);
                }

                Combo<DbType> dpTypeInput = new SelectionInputOption.Combo<DbType>(
                                "Database type", true, DbType.values(), ArrayUtils.indexOf(
                                                DbType.values(), dbServer.getDbType()), DbType.values());

                Text hostInput = new ManualInputOption.Text("Hostname", true,
                                dbServer.getHost());

                Integer portInput = new ManualInputOption.Integer("Port", true,
                                dbServer.getPort());

                Text databaseInput = new ManualInputOption.Text("Database", true,
                                dbServer.getDatabase());

                Text schemaInput = new ManualInputOption.Text("Schema", true,
                                dbServer.getSchema());

                Text userInput = new ManualInputOption.Text("Username", true,
                                dbServer.getUsername());

                PasswordViewable passwdInput = new ManualInputOption.PasswordViewable(
                                "Password", true, dbServer.getPassword());

                BooleanInputOption exposePkInput = new BooleanInputOption(
                                "Expose primary keys", dbServer.getExposePrimaryKey());

                Object[] input = MultipleOptionPane.showMultipleInputDialog(owner,
                                "DB Connection paramters", dpTypeInput, hostInput, portInput,
                                databaseInput, schemaInput, userInput, passwdInput,
                                exposePkInput);

                if (input == null) {
                        if (newCreated)
                                return null;
                        else
                                return dbServer;
                } else {
                        dbServer.setDbType((DbType) input[0]);
                        dbServer.setHost((String) input[1]);
                        dbServer.setPort((java.lang.Integer) input[2]);
                        dbServer.setDatabase((String) input[3]);
                        dbServer.setSchema((String) input[4]);
                        dbServer.setUsername((String) input[5]);
                        dbServer.setPassword(String.valueOf((char[]) input[6]));
                        dbServer.setExposePrimaryKey((Boolean) input[7]);
                }

                return dbServer;

        }

        /**
         * @return transforms the settings to a String that can be stored in a
         *         .properties line. @see #parsePropertiesString
         * @throws MalformedURLException
         */
        @Override
        public boolean parsePropertiesString(String propString) {

                if (propString == null || propString.isEmpty())
                        return false;
                try {

                        String[] split = propString.split(Pattern.quote(DELIMITER));

                        int i = 0;
                        setDbType(DbType.valueOf(split[i++]));
                        // DbServerSettings dbServer = new DbServerSettings(
                        // DbType.valueOf(split[i++])
                        // );

                        setTitle(split[i++]);
                        setHost(split[i++]);
                        setPort(java.lang.Integer.valueOf(split[i++]));
                        setUsername(StringUtils.stripToNull(split[i++]));
                        setPassword(split[i++]);
                        setDatabase(split[i++]);
                        setExposePrimaryKey(Boolean.valueOf(split[i++]));
                        setSchema(stringOrNull(split[i++]));

                        return true;
                } catch (Exception e) {
                        Log.warn("couldn't parse " + propString, e);
                        return false;
                }
        }

        private String[] cachedTypeNames = null;
        private String[] cachedGeometryTableNames;

        public GtDbServerSettings() {
                this(DbType.postgis);

        }

        public GtDbServerSettings(DbType dbType) {
                setDbType(dbType);
                setHost("localhost");
                setSchema("public");
                put(JDBCDataStoreFactory.PK_METADATA_TABLE.key, null);
        }

        public GtDbServerSettings(String propertiesString) {
                parsePropertiesString(propertiesString);
        }

        public String[] getCachedTypeNames() {
                return cachedTypeNames;
        }

        public String getDatabase() {
                return (String) get(JDBCDataStoreFactory.DATABASE.key);
        }

        public DbType getDbType() {
                String dbt = (String) get(PostgisNGDataStoreFactory.DBTYPE.key);
                if (dbt != null)
                        return DbType.valueOf(dbt);
                return null;
        }

        public Boolean getExposePrimaryKey() {
                Boolean expk = (Boolean) get(JDBCDataStoreFactory.EXPOSE_PK.key);
                if (expk == null)
                        return (Boolean) JDBCDataStoreFactory.EXPOSE_PK.sample;
                return expk;
        }

        public String getHost() {
                return (String) get(JDBCDataStoreFactory.HOST.key);
        }

        public String getPassword() {
                return (String) get(JDBCDataStoreFactory.PASSWD.key);
        }

        public java.lang.Integer getPort() {
                java.lang.Integer port = (java.lang.Integer) get(JDBCDataStoreFactory.PORT.key);
                if (port == null)
                        return (java.lang.Integer) JDBCDataStoreFactory.PORT.sample;
                return port;
        }

        public String getSchema() {
                return (String) get(JDBCDataStoreFactory.SCHEMA.key);
        }

        public String getUsername() {
                return (String) get(JDBCDataStoreFactory.USER.key);
        }

        /**
         * @return <code>true</code>, if all parameters look OK, without actually
         *         opening any connection.
         */
        public boolean isWellDefined() {
                if (getDbType() == null)
                        return false;

                if (getHost() == null)
                        return false;

                if (getUsername() == null)
                        return false;

                if (getPassword() == null)
                        return false;

                if (getPort() == null)
                        return false;

                if (getSchema() == null)
                        return false;

                return true;
        }

        public void setCachedTypeNames(String[] cachedTypeNames) {
                this.cachedTypeNames = cachedTypeNames;
        }

        public void setDatabase(String db) {
                put(JDBCDataStoreFactory.DATABASE.key, db);
        }

        public void setDbType(DbType dbType) {
                put(PostgisNGDataStoreFactory.DBTYPE.key, dbType.toString());

                if (dbType == DbType.postgis) {
                        if (getPort() == null) {
                                // For a PostGIS DBMS automatically set the port to 5432
                                setPort(5432);
                        }
                        if (getUsername() == null) {
                                // For a PostGIS DBMS automatically set the user to postgres
                                setUsername("postgres");
                        }

                }

        }

        public void setExposePrimaryKey(Boolean exportPk) {
                put(JDBCDataStoreFactory.EXPOSE_PK.key, exportPk);
        }

        public void setHost(String host) {
                put(JDBCDataStoreFactory.HOST.key, host);
        }

        public void setPassword(String password) {
                put(JDBCDataStoreFactory.PASSWD.key, password);
        }

        public void setPort(java.lang.Integer port) {
                put(JDBCDataStoreFactory.PORT.key, port);
        }

        public void setSchema(String schema) {
                put(JDBCDataStoreFactory.SCHEMA.key, schema);
        }

        public void setUsername(String username) {
                put(JDBCDataStoreFactory.USER.key, username);
        }

        /**
         * @return transforms the settings to a String that can be stored in a
         *         .properties line. @see #parsePropertiesString
         */
        public String toPropertiesString() {

                StringBuffer serialized = new StringBuffer(100);

                serialized.append(getDbType().toString());
                serialized.append(DELIMITER);

                serialized.append(getTitle());
                serialized.append(DELIMITER);

                serialized.append(getHost());
                serialized.append(DELIMITER);

                serialized.append(getPort().toString());
                serialized.append(DELIMITER);

                serialized.append(getUsername());
                serialized.append(DELIMITER);

                serialized.append(getPassword());
                serialized.append(DELIMITER);

                serialized.append(getDatabase());
                serialized.append(DELIMITER);

                serialized.append(getExposePrimaryKey().toString());
                serialized.append(DELIMITER);

                serialized.append(getSchema().toString());
                // serialized.append(DELIMITER);

                return serialized.toString();
        }

        @Override
        public String toString() {

                StringBuffer s = new StringBuffer();

                if (getDbType() != null) {
                        s.append(getDbType().getProtocolString() + "://");
                }

                s.append(getHost());

                if (getPort() != null && getPort() != 5432) {
                        s.append(":" + getPort());
                }

                s.append("/" + getDatabase());

                return s.toString();
        }

        /**
         * returns a valid Connection to our postgresql Database. Name of database,
         * username and password must be provided.
         * 
         * @param database
         *            name of the database
         * @param username
         *            a valid username
         * @param password
         *            valid password
         * @return database connection
         * @throws SQLException
         * @throws ClassNotFoundException
         */
        public Connection getDatabaseConnection() {

                try {

                        if (dbc == null || dbc.isClosed()) {
                                dbc = createNewDatabaseConnection();
                        }
                        return dbc;
                } catch (Exception e) {
                        return null;
                }
        }

        private Connection createNewDatabaseConnection() throws SQLException {
                try {
                        Class.forName("org.postgresql.Driver");
                } catch (ClassNotFoundException e) {
                        throw new RuntimeException(e);
                }
                String url = "jdbc:postgresql://" + getHost()
                // + (":" + PropertyUtils.getDbPort())
                                + ("/" + getDatabase());

                String password = getPassword();
                String username = getUsername();

                // log.debug("DB URL: " + url + " u=" + username + " p="
                // + password);

                return DriverManager.getConnection(url, username, password);
        }

        public String[] getDescribedTablesWithGeometry() {

                if (cachedGeometryTableNames == null) {

                        Connection dc;
                        try {
                                dc = createNewDatabaseConnection();
                                try {

                                        cachedGeometryTableNames = PGUtil
                                                        .getColumnsDescribedInGeometryColumnsTable(dc
                                                                        .createStatement());

                                } catch (SQLException e) {
                                        log.error(e, e);
                                } finally {
                                        dc.close();
                                }
                        } catch (SQLException e1) {
                                log.error(e1, e1);
                                return new String[0];
                        }
                }
                return cachedGeometryTableNames;
        }

        @Override
        protected void finalize() throws Throwable {
                super.finalize();
                dispose();
        }

        public void dispose() {
                try {
                        if (dbc != null && !dbc.isClosed()) {
                                dbc.close();
                                dbc = null;
                        }
                } catch (SQLException e) {
                        log.error("Error while disposing the database connection to "
                                        + toString(), e);
                }
        }
}
1	package skrueger.geotools.io;
2
3	import java.awt.Component;
4	import java.net.MalformedURLException;
5	import java.sql.Connection;
6	import java.sql.DriverManager;
7	import java.sql.SQLException;
8	import java.util.HashMap;
9	import java.util.regex.Pattern;
10
11	import org.apache.commons.lang.ArrayUtils;
12	import org.apache.commons.lang.StringUtils;
13	import org.apache.log4j.Logger;
14	import org.geotools.data.postgis.PostgisNGDataStoreFactory;
15	import org.geotools.jdbc.JDBCDataStore;
16	import org.geotools.jdbc.JDBCDataStoreFactory;
17	import org.jfree.util.Log;
18
19	import schmitzm.swing.BooleanInputOption;
20	import schmitzm.swing.ManualInputOption;
21	import schmitzm.swing.ManualInputOption.Integer;
22	import schmitzm.swing.ManualInputOption.PasswordViewable;
23	import schmitzm.swing.ManualInputOption.Text;
24	import schmitzm.swing.MultipleOptionPane;
25	import schmitzm.swing.SelectionInputOption;
26	import schmitzm.swing.SelectionInputOption.Combo;
27	import skrueger.db.PGUtil;
28
29	/**
30	* This class describes all settings needed to connect to a WFS server. This
31	* class extends a {@link HashMap} and contains two groups of keys:<br/>
32	* The first group of keys, are all keys provided by Geotools to create a WFS
33	* datastore, like: {@link JDBCDataStore#SCHEMA} .<br/>
34	* The second group are additional keys defined in the enum
35	* {@link GtDbServerSettings.Key}.<br/>
36	* This class can serialize all important parameters needed to define the
37	* connection into a {@link String} with {@link #toPropertiesString()} and
38	* re-import the String with {@link #parsePropertiesString(String)}.
39	*/
40	public class GtDbServerSettings extends AbstractGTServerSettings<Object, Object> {
41
42	Logger log = Logger.getLogger(GtDbServerSettings.class);
43
44	public enum DbType {
45	postgis("postgresql");
46
47	private final String protocolString;
48
49	DbType(String protocolString) {
50	this.protocolString = protocolString;
51	}
52
53	public String getProtocolString() {
54	return protocolString;
55	};
56	}
57
58	/**
59	* params.put(JDBCDataStoreFactory.DBTYPE.key, "postgis");
60	* params.put(JDBCDataStoreFactory.HOST.key, host); // the name or ip
61	* params.put(JDBCDataStoreFactory.PORT.key, port); // the port that
62	*
63	* params.put(JDBCDataStoreFactory.DATABASE.key, database); // the
64	*
65	* // name params.put(JDBCDataStoreFactory.USER.key, username); // the user
66	* to params.put(JDBCDataStoreFactory.PASSWD.key, password); // the
67	*
68	* params.put(JDBCDataStoreFactory.SCHEMA, schema);
69	*
70	* params.put(JDBCDataStoreFactory.EXPOSE_PK.key, true); *
71	*/
72
73	public enum Key {
74	}
75
76	private static Connection dbc;
77
78	/**
79	* Opens a GUI that asks the use define a DB connection.
80	*
81	* @param dbServer
82	* <code>null</code> to create a new instance, or an instance to
83	* edit.
84	* @return <code>null</code> if the user cancelled the creation of a new
85	* {@link GtDbServerSettings}, otherwise the edited instance.
86	*/
87	public static GtDbServerSettings createOrEdit(Component owner,
88	GtDbServerSettings dbServer) {
89	boolean newCreated = false;
90
91	if (dbServer == null) {
92	newCreated = true;
93	dbServer = new GtDbServerSettings(DbType.postgis);
94	}
95
96	Combo<DbType> dpTypeInput = new SelectionInputOption.Combo<DbType>(
97	"Database type", true, DbType.values(), ArrayUtils.indexOf(
98	DbType.values(), dbServer.getDbType()), DbType.values());
99
100	Text hostInput = new ManualInputOption.Text("Hostname", true,
101	dbServer.getHost());
102
103	Integer portInput = new ManualInputOption.Integer("Port", true,
104	dbServer.getPort());
105
106	Text databaseInput = new ManualInputOption.Text("Database", true,
107	dbServer.getDatabase());
108
109	Text schemaInput = new ManualInputOption.Text("Schema", true,
110	dbServer.getSchema());
111
112	Text userInput = new ManualInputOption.Text("Username", true,
113	dbServer.getUsername());
114
115	PasswordViewable passwdInput = new ManualInputOption.PasswordViewable(
116	"Password", true, dbServer.getPassword());
117
118	BooleanInputOption exposePkInput = new BooleanInputOption(
119	"Expose primary keys", dbServer.getExposePrimaryKey());
120
121	Object[] input = MultipleOptionPane.showMultipleInputDialog(owner,
122	"DB Connection paramters", dpTypeInput, hostInput, portInput,
123	databaseInput, schemaInput, userInput, passwdInput,
124	exposePkInput);
125
126	if (input == null) {
127	if (newCreated)
128	return null;
129	else
130	return dbServer;
131	} else {
132	dbServer.setDbType((DbType) input[0]);
133	dbServer.setHost((String) input[1]);
134	dbServer.setPort((java.lang.Integer) input[2]);
135	dbServer.setDatabase((String) input[3]);
136	dbServer.setSchema((String) input[4]);
137	dbServer.setUsername((String) input[5]);
138	dbServer.setPassword(String.valueOf((char[]) input[6]));
139	dbServer.setExposePrimaryKey((Boolean) input[7]);
140	}
141
142	return dbServer;
143
144	}
145
146	/**
147	* @return transforms the settings to a String that can be stored in a
148	* .properties line. @see #parsePropertiesString
149	* @throws MalformedURLException
150	*/
151	@Override
152	public boolean parsePropertiesString(String propString) {
153
154	if (propString == null \|\| propString.isEmpty())
155	return false;
156	try {
157
158	String[] split = propString.split(Pattern.quote(DELIMITER));
159
160	int i = 0;
161	setDbType(DbType.valueOf(split[i++]));
162	// DbServerSettings dbServer = new DbServerSettings(
163	// DbType.valueOf(split[i++])
164	// );
165
166	setTitle(split[i++]);
167	setHost(split[i++]);
168	setPort(java.lang.Integer.valueOf(split[i++]));
169	setUsername(StringUtils.stripToNull(split[i++]));
170	setPassword(split[i++]);
171	setDatabase(split[i++]);
172	setExposePrimaryKey(Boolean.valueOf(split[i++]));
173	setSchema(stringOrNull(split[i++]));
174
175	return true;
176	} catch (Exception e) {
177	Log.warn("couldn't parse " + propString, e);
178	return false;
179	}
180	}
181
182	private String[] cachedTypeNames = null;
183	private String[] cachedGeometryTableNames;
184
185	public GtDbServerSettings() {
186	this(DbType.postgis);
187
188	}
189
190	public GtDbServerSettings(DbType dbType) {
191	setDbType(dbType);
192	setHost("localhost");
193	setSchema("public");
194	put(JDBCDataStoreFactory.PK_METADATA_TABLE.key, null);
195	}
196
197	public GtDbServerSettings(String propertiesString) {
198	parsePropertiesString(propertiesString);
199	}
200
201	public String[] getCachedTypeNames() {
202	return cachedTypeNames;
203	}
204
205	public String getDatabase() {
206	return (String) get(JDBCDataStoreFactory.DATABASE.key);
207	}
208
209	public DbType getDbType() {
210	String dbt = (String) get(PostgisNGDataStoreFactory.DBTYPE.key);
211	if (dbt != null)
212	return DbType.valueOf(dbt);
213	return null;
214	}
215
216	public Boolean getExposePrimaryKey() {
217	Boolean expk = (Boolean) get(JDBCDataStoreFactory.EXPOSE_PK.key);
218	if (expk == null)
219	return (Boolean) JDBCDataStoreFactory.EXPOSE_PK.sample;
220	return expk;
221	}
222
223	public String getHost() {
224	return (String) get(JDBCDataStoreFactory.HOST.key);
225	}
226
227	public String getPassword() {
228	return (String) get(JDBCDataStoreFactory.PASSWD.key);
229	}
230
231	public java.lang.Integer getPort() {
232	java.lang.Integer port = (java.lang.Integer) get(JDBCDataStoreFactory.PORT.key);
233	if (port == null)
234	return (java.lang.Integer) JDBCDataStoreFactory.PORT.sample;
235	return port;
236	}
237
238	public String getSchema() {
239	return (String) get(JDBCDataStoreFactory.SCHEMA.key);
240	}
241
242	public String getUsername() {
243	return (String) get(JDBCDataStoreFactory.USER.key);
244	}
245
246	/**
247	* @return <code>true</code>, if all parameters look OK, without actually
248	* opening any connection.
249	*/
250	public boolean isWellDefined() {
251	if (getDbType() == null)
252	return false;
253
254	if (getHost() == null)
255	return false;
256
257	if (getUsername() == null)
258	return false;
259
260	if (getPassword() == null)
261	return false;
262
263	if (getPort() == null)
264	return false;
265
266	if (getSchema() == null)
267	return false;
268
269	return true;
270	}
271
272	public void setCachedTypeNames(String[] cachedTypeNames) {
273	this.cachedTypeNames = cachedTypeNames;
274	}
275
276	public void setDatabase(String db) {
277	put(JDBCDataStoreFactory.DATABASE.key, db);
278	}
279
280	public void setDbType(DbType dbType) {
281	put(PostgisNGDataStoreFactory.DBTYPE.key, dbType.toString());
282
283	if (dbType == DbType.postgis) {
284	if (getPort() == null) {
285	// For a PostGIS DBMS automatically set the port to 5432
286	setPort(5432);
287	}
288	if (getUsername() == null) {
289	// For a PostGIS DBMS automatically set the user to postgres
290	setUsername("postgres");
291	}
292
293	}
294
295	}
296
297	public void setExposePrimaryKey(Boolean exportPk) {
298	put(JDBCDataStoreFactory.EXPOSE_PK.key, exportPk);
299	}
300
301	public void setHost(String host) {
302	put(JDBCDataStoreFactory.HOST.key, host);
303	}
304
305	public void setPassword(String password) {
306	put(JDBCDataStoreFactory.PASSWD.key, password);
307	}
308
309	public void setPort(java.lang.Integer port) {
310	put(JDBCDataStoreFactory.PORT.key, port);
311	}
312
313	public void setSchema(String schema) {
314	put(JDBCDataStoreFactory.SCHEMA.key, schema);
315	}
316
317	public void setUsername(String username) {
318	put(JDBCDataStoreFactory.USER.key, username);
319	}
320
321	/**
322	* @return transforms the settings to a String that can be stored in a
323	* .properties line. @see #parsePropertiesString
324	*/
325	public String toPropertiesString() {
326
327	StringBuffer serialized = new StringBuffer(100);
328
329	serialized.append(getDbType().toString());
330	serialized.append(DELIMITER);
331
332	serialized.append(getTitle());
333	serialized.append(DELIMITER);
334
335	serialized.append(getHost());
336	serialized.append(DELIMITER);
337
338	serialized.append(getPort().toString());
339	serialized.append(DELIMITER);
340
341	serialized.append(getUsername());
342	serialized.append(DELIMITER);
343
344	serialized.append(getPassword());
345	serialized.append(DELIMITER);
346
347	serialized.append(getDatabase());
348	serialized.append(DELIMITER);
349
350	serialized.append(getExposePrimaryKey().toString());
351	serialized.append(DELIMITER);
352
353	serialized.append(getSchema().toString());
354	// serialized.append(DELIMITER);
355
356	return serialized.toString();
357	}
358
359	@Override
360	public String toString() {
361
362	StringBuffer s = new StringBuffer();
363
364	if (getDbType() != null) {
365	s.append(getDbType().getProtocolString() + "://");
366	}
367
368	s.append(getHost());
369
370	if (getPort() != null && getPort() != 5432) {
371	s.append(":" + getPort());
372	}
373
374	s.append("/" + getDatabase());
375
376	return s.toString();
377	}
378
379	/**
380	* returns a valid Connection to our postgresql Database. Name of database,
381	* username and password must be provided.
382	*
383	* @param database
384	* name of the database
385	* @param username
386	* a valid username
387	* @param password
388	* valid password
389	* @return database connection
390	* @throws SQLException
391	* @throws ClassNotFoundException
392	*/
393	public Connection getDatabaseConnection() {
394
395	try {
396
397	if (dbc == null \|\| dbc.isClosed()) {
398	dbc = createNewDatabaseConnection();
399	}
400	return dbc;
401	} catch (Exception e) {
402	return null;
403	}
404	}
405
406	private Connection createNewDatabaseConnection() throws SQLException {
407	try {
408	Class.forName("org.postgresql.Driver");
409	} catch (ClassNotFoundException e) {
410	throw new RuntimeException(e);
411	}
412	String url = "jdbc:postgresql://" + getHost()
413	// + (":" + PropertyUtils.getDbPort())
414	+ ("/" + getDatabase());
415
416	String password = getPassword();
417	String username = getUsername();
418
419	// log.debug("DB URL: " + url + " u=" + username + " p="
420	// + password);
421
422	return DriverManager.getConnection(url, username, password);
423	}
424
425	public String[] getDescribedTablesWithGeometry() {
426
427	if (cachedGeometryTableNames == null) {
428
429	Connection dc;
430	try {
431	dc = createNewDatabaseConnection();
432	try {
433
434	cachedGeometryTableNames = PGUtil
435	.getColumnsDescribedInGeometryColumnsTable(dc
436	.createStatement());
437
438	} catch (SQLException e) {
439	log.error(e, e);
440	} finally {
441	dc.close();
442	}
443	} catch (SQLException e1) {
444	log.error(e1, e1);
445	return new String[0];
446	}
447	}
448	return cachedGeometryTableNames;
449	}
450
451	@Override
452	protected void finalize() throws Throwable {
453	super.finalize();
454	dispose();
455	}
456
457	public void dispose() {
458	try {
459	if (dbc != null && !dbc.isClosed()) {
460	dbc.close();
461	dbc = null;
462	}
463	} catch (SQLException e) {
464	log.error("Error while disposing the database connection to "
465	+ toString(), e);
466	}
467	}
468	}
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