001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041:
042: package org.netbeans.modules.db.runtime;
043:
044: import java.util.Collection;
045: import java.util.Iterator;
046: import java.util.LinkedList;
047: import java.util.List;
048: import java.util.logging.Level;
049: import java.util.logging.Logger;
050: import org.netbeans.spi.db.explorer.DatabaseRuntime;
051: import org.openide.util.Lookup;
052: import org.openide.util.lookup.Lookups;
053:
054: /**
055: * This class managers the list of registered database runtimes. Database runtimes
056: * encapsulate instances of a database server which can be automatically started
057: * by the IDE when a connection is being made to this server.
058: *
059: * @see org.netbeans.spi.db.explorer.DatabaseRuntime
060: *
061: * @author Nam Nguyen, Andrei Badea
062: */
063: public final class DatabaseRuntimeManager {
064:
065: private static final Logger LOGGER = Logger
066: .getLogger(DatabaseRuntimeManager.class.getName());
067: private static final boolean LOG = LOGGER.isLoggable(Level.FINE);
068:
069: /**
070: * The path where the runtimes are registered in the SystemFileSystem.
071: */
072: private static final String RUNTIMES_PATH = "Databases/Runtimes"; // NOI18N
073:
074: /**
075: * The singleton database runtime manager instance.
076: */
077: private static DatabaseRuntimeManager DEFAULT = null;
078:
079: /**
080: * The Lookup.Result instance containing all the DatabaseRuntime instances.
081: */
082: private Lookup.Result result = getLookupResult();
083:
084: /**
085: * Returns the singleton database runtime manager instance.
086: */
087: public static synchronized DatabaseRuntimeManager getDefault() {
088: if (DEFAULT == null) {
089: DEFAULT = new DatabaseRuntimeManager();
090: }
091: return DEFAULT;
092: }
093:
094: public DatabaseRuntime[] getRuntimes() {
095: Collection runtimes = result.allInstances();
096: return (DatabaseRuntime[]) runtimes
097: .toArray(new DatabaseRuntime[runtimes.size()]);
098: }
099:
100: /**
101: * Returns the runtimes registered for the specified JDBC driver.
102: *
103: * @param jdbcDriverClassName the JDBC driver to search for; must not be null.
104: *
105: * @return the runtime registered for the specified JDBC driver or null
106: * if no runtime is registered for this driver.
107: *
108: * @throws NullPointerException if the specified JDBC driver is null.
109: */
110: public DatabaseRuntime[] getRuntimes(String jdbcDriverClassName) {
111: if (jdbcDriverClassName == null) {
112: throw new NullPointerException();
113: }
114: List/*<DatabaseRuntime>*/runtimeList = new LinkedList();
115: for (Iterator i = result.allInstances().iterator(); i.hasNext();) {
116: DatabaseRuntime runtime = (DatabaseRuntime) i.next();
117: if (LOG) {
118: LOGGER.log(Level.FINE, "Runtime: "
119: + runtime.getClass().getName() + " for driver "
120: + runtime.getJDBCDriverClass()); // NOI18N
121: }
122: if (jdbcDriverClassName
123: .equals(runtime.getJDBCDriverClass())) {
124: runtimeList.add(runtime);
125: }
126: }
127: return (DatabaseRuntime[]) runtimeList
128: .toArray(new DatabaseRuntime[runtimeList.size()]);
129: }
130:
131: private synchronized Lookup.Result getLookupResult() {
132: return Lookups.forPath(RUNTIMES_PATH).lookupResult(
133: DatabaseRuntime.class);
134: }
135: }
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