org.argeo.slc/src/main/java/org/argeo/slc/ant/SlcProjectHelper.java

   1 package org.argeo.slc.ant;
   2
   3 import java.io.File;
   4 import java.io.IOException;
   5 import java.io.InputStream;
   6 import java.util.List;
   7 import java.util.Map;
   8 import java.util.Properties;
   9 import java.util.Vector;
  10
  11 import org.springframework.context.support.AbstractApplicationContext;
  12 import org.springframework.context.support.FileSystemXmlApplicationContext;
  13
  14 import org.apache.commons.logging.Log;
  15 import org.apache.commons.logging.LogFactory;
  16 import org.apache.tools.ant.BuildException;
  17 import org.apache.tools.ant.Project;
  18 import org.apache.tools.ant.helper.ProjectHelperImpl;
  19
  20 import org.argeo.slc.core.structure.DefaultSRegistry;
  21 import org.argeo.slc.core.structure.SimpleSElement;
  22 import org.argeo.slc.core.structure.StructureRegistry;
  23 import org.argeo.slc.core.structure.tree.TreeSPath;
  24
  25 /**
  26  * Custom implementation of an Ant <code>ProjectHelper</code> binding a Spring
  27  * application context and a structure registry with the Ant project.
  28  */
  29 public class SlcProjectHelper extends ProjectHelperImpl {
  30         private static Log log;
  31
  32         /** The Ant reference to the Spring application context used. */
  33         public static String REF_ROOT_CONTEXT = "slcApplicationContext";
  34         /** The Ant reference to the SLC structure registry used. */
  35         public static String REF_STRUCTURE_REGISTRY = "slcStructureRegistry";
  36         /** The Ant reference to the <code>TreePath</code> of the current project */
  37         private static String REF_PROJECT_PATH = "slcProjectPath";
  38         /**
  39          * Resource path to the property file listing the SLC specific Ant tasks:
  40          * /org/argeo/slc/ant/taskdefs.properties
  41          */
  42         private static String SLC_TASKDEFS_RESOURCE_PATH = "/org/argeo/slc/ant/taskdefs.properties";
  43
  44         @Override
  45         public void parse(Project project, Object source) throws BuildException {
  46
  47                 // initialize config
  48                 SlcAntConfig slcAntConfig = new SlcAntConfig();
  49                 slcAntConfig.initProject(project);
  50
  51                 if (log == null) {
  52                         // log4j is initialized only now
  53                         log = LogFactory.getLog(SlcProjectHelper.class);
  54                 }
  55                 log.debug("SLC properties are set, starting initialization..");
  56
  57                 // init Spring application context
  58                 initSpringContext(project);
  59
  60                 // init structure registry
  61                 DefaultSRegistry registry = new DefaultSRegistry();
  62                 project.addReference(REF_STRUCTURE_REGISTRY, registry);
  63
  64                 // call the underlying implementation to do the actual work
  65                 super.parse(project, source);
  66
  67                 // create structure root
  68                 registerProjectAndParents(project, slcAntConfig);
  69
  70                 addSlcTasks(project);
  71
  72         }
  73
  74         /** Creates the tree-based structure for this project. */
  75         private void registerProjectAndParents(Project project,
  76                         SlcAntConfig slcAntConfig) {
  77                 StructureRegistry registry = (StructureRegistry) project
  78                                 .getReference(REF_STRUCTURE_REGISTRY);
  79                 File rootDir = new File(project
  80                                 .getUserProperty(SlcAntConfig.ROOT_DIR_PROPERTY))
  81                                 .getAbsoluteFile();
  82                 File baseDir = project.getBaseDir().getAbsoluteFile();
  83
  84                 List<File> dirs = new Vector<File>();
  85                 File currentDir = baseDir;
  86                 do {
  87                         dirs.add(currentDir);
  88                         currentDir = currentDir.getParentFile();
  89                         if (log.isTraceEnabled())
  90                                 log.trace("List " + currentDir);
  91                 } while (!currentDir.equals(rootDir.getParentFile()));
  92
  93                 // first path is root dir (because of previous algorithm)
  94                 TreeSPath currPath = TreeSPath.createRootPath(rootDir.getName());
  95                 for (int i = dirs.size() - 1; i >= 0; i--) {
  96                         File dir = dirs.get(i);
  97
  98                         // retrieves description for this path
  99                         final String description;
 100                         if (i == 0) {// project itself
 101                                 description = project.getDescription() != null ? project
 102                                                 .getDescription() : "";
 103                         } else {
 104                                 description = slcAntConfig.getDescriptionForDir(dir);
 105                         }
 106                         SimpleSElement element = new SimpleSElement(description);
 107
 108                         // creates and register path
 109                         if (!dir.equals(rootDir)) {// already set
 110                                 currPath = currPath.createChild(dir.getName());
 111                         }
 112                         registry.register(currPath, element);
 113                 }
 114                 project.addReference(REF_PROJECT_PATH, currPath);
 115         }
 116
 117         /** Gets the path of a project (root). */
 118         public static TreeSPath getProjectPath(Project project) {
 119                 return (TreeSPath) project.getReference(REF_PROJECT_PATH);
 120         }
 121
 122         /** Initializes the Spring application context. */
 123         private void initSpringContext(Project project) {
 124                 System.getProperties().putAll((Map<?, ?>) project.getProperties());
 125                 String acPath = project
 126                                 .getUserProperty(SlcAntConfig.APPLICATION_CONTEXT_PROPERTY);
 127                 AbstractApplicationContext context = new FileSystemXmlApplicationContext(
 128                                 acPath);
 129                 context.registerShutdownHook();
 130                 project.addReference(REF_ROOT_CONTEXT, context);
 131         }
 132
 133         /** Loads the SLC specific Ant tasks. */
 134         private void addSlcTasks(Project project) {
 135                 Properties taskdefs = new Properties();
 136                 try {
 137                         InputStream in = project.getClass().getResourceAsStream(
 138                                         SLC_TASKDEFS_RESOURCE_PATH);
 139                         taskdefs.load(in);
 140                         in.close();
 141                 } catch (IOException e) {
 142                         throw new SlcAntException("Cannot load task definitions", e);
 143                 }
 144
 145                 for (Object o : taskdefs.keySet()) {
 146                         String name = o.toString();
 147                         try {
 148                                 project.addTaskDefinition(name, Class.forName(taskdefs
 149                                                 .getProperty(name)));
 150                         } catch (ClassNotFoundException e) {
 151                                 log.error("Unknown class for task " + name, e);
 152                         }
 153                 }
 154         }
 155 }