001: /* ========================================================================
002: * JCommon : a free general purpose class library for the Java(tm) platform
003: * ========================================================================
004: *
005: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006: *
007: * Project Info: http://www.jfree.org/jcommon/index.html
008: *
009: * This library is free software; you can redistribute it and/or modify it
010: * under the terms of the GNU Lesser General Public License as published by
011: * the Free Software Foundation; either version 2.1 of the License, or
012: * (at your option) any later version.
013: *
014: * This library is distributed in the hope that it will be useful, but
015: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017: * License for more details.
018: *
019: * You should have received a copy of the GNU Lesser General Public
020: * License along with this library; if not, write to the Free Software
021: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022: * USA.
023: *
024: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025: * in the United States and other countries.]
026: *
027: * ------------------------------------
028: * PropertyFileReportConfiguration.java
029: * ------------------------------------
030: * (C)opyright 2003, by Thomas Morgner and Contributors.
031: *
032: * Original Author: Thomas Morgner;
033: * Contributor(s): David Gilbert (for Object Refinery Limited);
034: *
035: * $Id: PropertyFileConfiguration.java,v 1.7 2007/05/15 12:32:15 taqua Exp $
036: *
037: * Changes
038: * -------
039: * 14-Jan-2003 : Initial version
040: */
041: package org.jfree.base.config;
042:
043: import java.io.BufferedInputStream;
044: import java.io.IOException;
045: import java.io.InputStream;
046: import java.util.Properties;
047:
048: import org.jfree.util.Log;
049: import org.jfree.util.ObjectUtilities;
050:
051: /**
052: * A report configuration that reads its values from an arbitary property file.
053: *
054: * @author Thomas Morgner
055: */
056: public class PropertyFileConfiguration extends
057: HierarchicalConfiguration {
058: /**
059: * Loads the properties stored in the given file. This method does nothing if
060: * the file does not exist or is unreadable. Appends the contents of the loaded
061: * properties to the already stored contents.
062: *
063: * @param resourceName the file name of the stored properties.
064: */
065: public void load(final String resourceName) {
066: final InputStream in = ObjectUtilities
067: .getResourceRelativeAsStream(resourceName,
068: PropertyFileConfiguration.class);
069: if (in != null) {
070: load(in);
071: } else {
072: Log.debug("Configuration file not found in the classpath: "
073: + resourceName);
074: }
075:
076: }
077:
078: /**
079: * Loads the properties stored in the given file. This method does nothing if
080: * the file does not exist or is unreadable. Appends the contents of the loaded
081: * properties to the already stored contents.
082: *
083: * @param in the input stream used to read the properties.
084: */
085: public void load(final InputStream in) {
086: if (in == null) {
087: throw new NullPointerException();
088: }
089:
090: try {
091: final BufferedInputStream bin = new BufferedInputStream(in);
092: final Properties p = new Properties();
093: p.load(bin);
094: this .getConfiguration().putAll(p);
095: bin.close();
096: } catch (IOException ioe) {
097: Log.warn("Unable to read configuration", ioe);
098: }
099:
100: }
101:
102: /**
103: * Default constructor.
104: */
105: public PropertyFileConfiguration() {
106: // nothing required
107: }
108: }
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