cdmlib-persistence/src/main/java/eu/etaxonomy/cdm/api/application/CdmApplicationUtils.java

   1 package eu.etaxonomy.cdm.api.application;
   2
   3 import static eu.etaxonomy.cdm.common.XmlHelp.getRoot;
   4
   5 import java.io.File;
   6 import java.io.FileOutputStream;
   7 import java.io.IOException;
   8 import java.io.InputStream;
   9 import java.net.URL;
  10
  11 import org.apache.log4j.Logger;
  12 import org.jdom.output.Format;
  13
  14 import eu.etaxonomy.cdm.common.CdmUtils;
  15 import eu.etaxonomy.cdm.common.XmlHelp;
  16 import eu.etaxonomy.cdm.database.CdmDataSource;
  17
  18 public class CdmApplicationUtils {
  19         private static final Logger logger = Logger.getLogger(CdmApplicationUtils.class);
  20
  21         //directory of the resources (configfiles etc.)
  22         static File fileResourceDir;
  23         static final String MUST_EXIST_FILE = "applicationContext.xml";
  24
  25         /**
  26          * Returns the directory path to the writable resources. (Resources must be copied to this directory, this is automatically done for
  27          * the cdm.datasource.xml, sessionfactory.xml and applicationContext.xml
  28          * @return
  29          */
  30         public static File getWritableResourceDir(){
  31                 //compute only once
  32                 if (fileResourceDir == null){
  33                         //workaround to find out in which environment the library is executed
  34                         URL url = CdmUtils.class.getResource("/"+ MUST_EXIST_FILE);
  35                         if (url != null){
  36                                 File file = new File(url.getPath());
  37                                 if (file.exists()){
  38                                         fileResourceDir= file.getParentFile();
  39                                 }else{
  40                                         String subPath = File.separator + "cdmResources" ;
  41                                         file = new File(System.getProperty("user.home") + File.separator + ".cdmLibrary" + File.separator + "writableResources" );
  42                                         //file = new File(System.getProperty("user.dir") + subPath );  //does not work in plugin-environmen (uses eclipse installation directory)
  43
  44                                         file.mkdirs();
  45                                         copyResources(file);
  46                                         fileResourceDir = file;
  47                                 }
  48                         }
  49                         logger.debug("Resource directory: " + (fileResourceDir == null?"null":fileResourceDir.getAbsolutePath()));
  50                 }
  51                 return fileResourceDir;
  52         }
  53
  54         static private void copyResources(File directory){
  55                 copyResource(directory, CdmDataSource.DATASOURCE_FILE_NAME);
  56         }
  57
  58
  59         /**
  60          * Copies a file from the classpath resource (e.g. jar-File) to the resources directory in the file system (get
  61          * @param directory
  62          * @param resourceFileName
  63          */
  64         static private void copyResource(File directory, String resourceFileName){
  65                 try {
  66                         File fileToCopy = new File(directory + File.separator + resourceFileName);
  67                         if (fileToCopy.createNewFile()){
  68                                 InputStream isDataSource = CdmUtils.class.getResourceAsStream("/"+ resourceFileName);
  69                                 XmlHelp.saveToXml(getRoot(isDataSource).getDocument(), new FileOutputStream(fileToCopy), Format.getPrettyFormat());
  70                         }
  71                 } catch (IOException e) {
  72                         logger.error("File "  + resourceFileName + " + could not be created");
  73                 }
  74         }
  75
  76
  77 }