Source Code Cross Referenced for PropertyFileConfiguration.java in  » Graphic-Library » jcommon-components » org » jfree » base » config » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Graphic Library » jcommon components » org.jfree.base.config 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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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