001 /*
002 * $RCSfile: MergeProperties.java,v $
003 * $Revision: 1.2 $ $Date: 2006/11/22 10:50:21 $
004 *
005 * This file is part of *** M y C o R e ***
006 * See http://www.mycore.de/ for details.
007 *
008 * This program is free software; you can use it, redistribute it
009 * and / or modify it under the terms of the GNU General Public License
010 * (GPL) as published by the Free Software Foundation; either version 2
011 * of the License or (at your option) any later version.
012 *
013 * This program is distributed in the hope that it will be useful, but
014 * WITHOUT ANY WARRANTY; without even the implied warranty of
015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
016 * GNU General Public License for more details.
017 *
018 * You should have received a copy of the GNU General Public License
019 * along with this program, in a file called gpl.txt or license.txt.
020 * If not, write to the Free Software Foundation Inc.,
021 * 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA
022 */
023 package org.mycore.buildtools.anttasks;
024
025 import java.io.FileInputStream;
026 import java.io.FileOutputStream;
027 import java.io.InputStream;
028 import java.io.OutputStream;
029 import java.util.Properties;
030
031 import org.apache.tools.ant.BuildException;
032 import org.apache.tools.ant.Task;
033
034 /**
035 * Ant task, that can be used to merges one properties file into another.
036 * New Properties will be added, existing properties overwritten.
037 *
038 * @author Robert Stephan
039 *
040 * @version $Revision: 13085 $ $Date: 2008-02-06 18:27:24 +0100 (Mi, 06 Feb 2008) $
041 *
042 */
043 public class MCRMergePropertiesTask extends Task {
044 private String base, delta;
045
046 /**
047 * sets the base properties file
048 * @param f the base properties file
049 */
050 public void setBasefile(String f) {
051 base = f;
052 }
053
054 /**
055 * sets the delta properties file, containing the new properties, which will
056 * be added or used as a replacement
057 * @param f the delta properties file
058 */
059 public void setDeltafile(String f) {
060 delta = f;
061 }
062
063 /* (non-Javadoc)
064 * @see org.apache.tools.ant.Task#execute()
065 */
066 public void execute() throws BuildException {
067 if (base == null || delta == null) {
068 throw new BuildException("all parameter must be specified: \n"
069 + "basefile -the basic property file \n"
070 + "deltafile -the property file, containg the changes \n");
071 }
072
073 try {
074 Properties baseProps = new Properties();
075 InputStream isBase =new FileInputStream(base);
076 baseProps.load(isBase);
077 isBase.close();
078
079 Properties deltaProps = new Properties();
080 InputStream isDelta = new FileInputStream(delta);
081 deltaProps.load(isDelta);
082 isDelta.close();
083
084 baseProps.putAll(deltaProps);
085
086 OutputStream propOut = new FileOutputStream(base);
087 baseProps.store(propOut, "Merged Properties File");
088 propOut.close();
089 } catch (Exception e) {
090 throw new BuildException("Something went wrong at reading or writing a properties file",e);
091 }
092 }
093
094 /**
095 * simple testcase for class
096 * @param args unsed default arguments for main method
097 */
098 public static void main(String[] args){
099 String baseFile="C:\\workspaces\\atlibri\\antmycore\\test\\mergeproperties\\base.properties";
100 String deltaFile="C:\\workspaces\\atlibri\\antmycore\\test\\mergeproperties\\delta.properties";
101
102 MCRMergePropertiesTask mx = new MCRMergePropertiesTask();
103 mx.setBasefile(baseFile);
104 mx.setDeltafile(deltaFile);
105
106 mx.execute();
107 }
108 }