001    /**
002     * Copyright 2009-2012 The Kuali Foundation
003     *
004     * Licensed under the Educational Community License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.opensource.org/licenses/ecl2.php
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.codehaus.mojo.properties;
017    
018    /*
019     * Licensed to the Apache Software Foundation (ASF) under one
020     * or more contributor license agreements.  See the NOTICE file 
021     * distributed with this work for additional information
022     * regarding copyright ownership.  The ASF licenses this file
023     * to you under the Apache License, Version 2.0 (the
024     * "License"); you may not use this file except in compliance
025     * with the License.  You may obtain a copy of the License at
026     * 
027     *   http://www.apache.org/licenses/LICENSE-2.0
028     * 
029     * Unless required by applicable law or agreed to in writing, 
030     * software distributed under the License is distributed on an
031     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 
032     * KIND, either express or implied.  See the License for the 
033     * specific language governing permissions and limitations 
034     * under the License.
035     */
036    
037    import java.util.Properties;
038    import java.util.Enumeration;
039    
040    import org.apache.maven.plugin.MojoExecutionException;
041    import org.apache.maven.plugin.MojoFailureException;
042    
043    /**
044     * Writes project properties to a file.
045     *
046     * @author <a href="mailto:zarars@gmail.com">Zarar Siddiqi</a>
047     * @version $Id: WriteProjectProperties.java 9747 2009-05-20 13:27:44Z mark $
048     * @goal write-project-properties
049     */
050    public class WriteProjectProperties extends AbstractWritePropertiesMojo
051    {
052        public void execute()
053            throws MojoExecutionException, MojoFailureException
054        {
055            validateOutputFile();
056            Properties projProperties = new Properties();
057            projProperties.putAll( project.getProperties() );
058            
059            Properties systemProperties = System.getProperties();
060            
061            //allow system properties to over write key/value found in maven properties
062            Enumeration enumeration = systemProperties.keys();
063            while ( enumeration.hasMoreElements() )
064            {
065                String key = (String) enumeration.nextElement();
066                String value = systemProperties.getProperty( key );
067                if ( projProperties.get( key ) != null )
068                {
069                    projProperties.put( key, value );
070                }
071                
072            }
073            
074            writeProperties( projProperties, outputFile );
075        }
076    }