1 files changed, 130 insertions, 0 deletions
diff --git a/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/ExtensionReader.java b/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/ExtensionReader.java
new file mode 100644
index 00000000..c0c542e6
--- /dev/null
+++ b/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/ExtensionReader.java
@@ -0,0 +1,130 @@
+/*******************************************************************************
+ * Copyright (c) 2008-2010 Sonatype, Inc.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *      Sonatype, Inc. - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.m2e.core.internal;
+
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.osgi.framework.Bundle;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IContributor;
+import org.eclipse.core.runtime.IExtension;
+import org.eclipse.core.runtime.IExtensionPoint;
+import org.eclipse.core.runtime.IExtensionRegistry;
+import org.eclipse.core.runtime.Platform;
+
+import org.eclipse.m2e.core.archetype.ArchetypeCatalogFactory;
+import org.eclipse.m2e.core.core.IMavenConstants;
+import org.eclipse.m2e.core.core.MavenLogger;
+import org.eclipse.m2e.core.project.IMavenProjectChangedListener;
+
+
+/**
+ * Extension reader
+ * 
+ * @author Eugene Kuleshov
+ */
+public class ExtensionReader {
+
+  public static final String EXTENSION_ARCHETYPES = IMavenConstants.PLUGIN_ID + ".archetypeCatalogs"; //$NON-NLS-1$
+
+  public static final String EXTENSION_PROJECT_CHANGED_EVENT_LISTENERS = IMavenConstants.PLUGIN_ID + ".mavenProjectChangedListeners"; //$NON-NLS-1$
+
+  private static final String ELEMENT_LOCAL_ARCHETYPE = "local"; //$NON-NLS-1$
+
+  private static final String ELEMENT_REMOTE_ARCHETYPE = "remote"; //$NON-NLS-1$
+
+  private static final String ATTR_NAME = "name"; //$NON-NLS-1$
+
+  private static final String ATTR_URL = "url"; //$NON-NLS-1$
+
+  private static final String ATTR_DESCRIPTION = "description"; //$NON-NLS-1$
+
+  private static final String ELEMENT_LISTENER = "listener"; //$NON-NLS-1$
+
+  public static List<ArchetypeCatalogFactory> readArchetypeExtensions() {
+    List<ArchetypeCatalogFactory> archetypeCatalogs = new ArrayList<ArchetypeCatalogFactory>();
+
+    IExtensionRegistry registry = Platform.getExtensionRegistry();
+    IExtensionPoint archetypesExtensionPoint = registry.getExtensionPoint(EXTENSION_ARCHETYPES);
+    if(archetypesExtensionPoint != null) {
+      IExtension[] archetypesExtensions = archetypesExtensionPoint.getExtensions();
+      for(IExtension extension : archetypesExtensions) {
+        IConfigurationElement[] elements = extension.getConfigurationElements();
+        IContributor contributor = extension.getContributor();
+        for(IConfigurationElement element : elements) {
+          ArchetypeCatalogFactory factory = readArchetypeCatalogs(element, contributor);
+          // archetypeManager.addArchetypeCatalogFactory(factory);
+          archetypeCatalogs.add(factory);
+        }
+      }
+    }
+    return archetypeCatalogs;
+  }
+
+  private static ArchetypeCatalogFactory readArchetypeCatalogs(IConfigurationElement element, IContributor contributor) {
+    if(ELEMENT_LOCAL_ARCHETYPE.equals(element.getName())) {
+      String name = element.getAttribute(ATTR_NAME);
+      if(name != null) {
+        Bundle[] bundles = Platform.getBundles(contributor.getName(), null);
+        URL catalogUrl = null;
+        for(int i = 0; i < bundles.length; i++ ) {
+          Bundle bundle = bundles[i];
+          catalogUrl = bundle.getEntry(name);
+          if(catalogUrl != null) {
+            String description = element.getAttribute(ATTR_DESCRIPTION);
+            String url = catalogUrl.toString();
+            // XXX ARCHETYPE-161: RemoteCatalogArchetypeDataSource don't allow to download arbitrary urls
+            return new ArchetypeCatalogFactory.RemoteCatalogFactory(url.substring(0, url.lastIndexOf("/")), //$NON-NLS-1$
+                description, false);
+          }
+        }
+        MavenLogger.log("Unable to find Archetype catalog " + name + " in " + contributor.getName(), null);
+      }
+    } else if(ELEMENT_REMOTE_ARCHETYPE.equals(element.getName())) {
+      String url = element.getAttribute(ATTR_URL);
+      if(url != null) {
+        String description = element.getAttribute(ATTR_DESCRIPTION);
+        return new ArchetypeCatalogFactory.RemoteCatalogFactory(url, description, false);
+      }
+    }
+    return null;
+  }
+
+  public static List<IMavenProjectChangedListener> readProjectChangedEventListenerExtentions() {
+    ArrayList<IMavenProjectChangedListener> listeners = new ArrayList<IMavenProjectChangedListener>();
+
+    IExtensionRegistry registry = Platform.getExtensionRegistry();
+    IExtensionPoint mappingsExtensionPoint = registry.getExtensionPoint(EXTENSION_PROJECT_CHANGED_EVENT_LISTENERS);
+    if(mappingsExtensionPoint != null) {
+      IExtension[] mappingsExtensions = mappingsExtensionPoint.getExtensions();
+      for(IExtension extension : mappingsExtensions) {
+        IConfigurationElement[] elements = extension.getConfigurationElements();
+        for(IConfigurationElement element : elements) {
+          if(element.getName().equals(ELEMENT_LISTENER)) {
+            try {
+              listeners.add( (IMavenProjectChangedListener) element.createExecutableExtension("class") ); //$NON-NLS-1$
+            } catch(CoreException ex) {
+              MavenLogger.log(ex);
+            }
+          }
+        }
+      }
+    }
+
+    return listeners;
+  }
+
+}