Checked in support for plugin extension listener. Not using a configurable plexus component yet. The listener is added directly to the transform.

git-svn-id: https://svn.apache.org/repos/asf/maven/components/trunk@714122 13f79535-47bb-0310-9956-ffa450edef68

maven-project/src/main/java/org/apache/maven/project/builder/impl/DefaultProjectBuilder.java

@@ -33,12 +33,10 @@ import org.apache.maven.project.builder.PomArtifactResolver;
 import org.apache.maven.project.builder.PomClassicDomainModel;
 import org.apache.maven.project.builder.PomClassicTransformer;
 import org.apache.maven.project.builder.ProjectBuilder;
+import org.apache.maven.project.builder.listeners.PluginExtensionListener;
 import org.apache.maven.project.validation.ModelValidationResult;
 import org.apache.maven.project.validation.ModelValidator;
-import org.apache.maven.shared.model.DomainModel;
+import org.apache.maven.shared.model.*;
-import org.apache.maven.shared.model.ImportModel;
-import org.apache.maven.shared.model.InterpolatorProperty;
-import org.apache.maven.shared.model.ModelTransformerContext;
 import org.codehaus.plexus.logging.LogEnabled;
 import org.codehaus.plexus.logging.Logger;
 
@@ -178,7 +176,7 @@ public final class DefaultProjectBuilder
                                                                                                 transformer,
                                                                                                 importModels,
                                                                                                 properties,
-                                                                                                null) );
+                                                                                                Arrays.asList((ModelEventListener) new PluginExtensionListener())) );
         try
         {
             MavenProject mavenProject = new MavenProject( transformedDomainModel.getModel(), artifactFactory,

maven-project/src/main/java/org/apache/maven/project/builder/listeners/PluginExtensionListener.java

@@ -0,0 +1,66 @@
+package org.apache.maven.project.builder.listeners;
+
+import org.apache.maven.shared.model.ModelEventListener;
+import org.apache.maven.shared.model.ModelContainer;
+import org.apache.maven.shared.model.ModelContainerFactory;
+import org.apache.maven.shared.model.ModelProperty;
+import org.apache.maven.project.builder.ProjectUri;
+import org.apache.maven.project.builder.ArtifactModelContainerFactory;
+
+import java.util.List;
+import java.util.Collection;
+import java.util.Arrays;
+import java.util.ArrayList;
+
+public class PluginExtensionListener implements ModelEventListener {
+
+    public void fire(List<ModelContainer> modelContainers) {
+        List<Plugin> pluginsWithExtension = new ArrayList<Plugin>();
+        for (ModelContainer mc : modelContainers) {
+            if(hasExtension(mc)) {
+                pluginsWithExtension.add(new Plugin(mc.getProperties()));
+            }
+        }
+
+        //Do something with plugins here
+    }
+
+    public List<String> getUris() {
+        return Arrays.asList(ProjectUri.Build.Plugins.Plugin.xUri);
+    }
+
+    public Collection<ModelContainerFactory> getModelContainerFactories() {
+        return Arrays.asList((ModelContainerFactory) new ArtifactModelContainerFactory());
+    }
+
+    private static boolean hasExtension(ModelContainer container) {
+        for (ModelProperty mp : container.getProperties()) {
+            if (mp.getUri().equals(ProjectUri.Build.Plugins.Plugin.extensions) && mp.getValue().equals("true")) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static class Plugin {
+
+        private String groupId;
+
+        private String artifactId;
+
+        private String version;
+
+        Plugin(List<ModelProperty> modelProperties) {
+            for(ModelProperty mp : modelProperties) {
+                if(mp.getUri().equals(ProjectUri.Build.Plugins.Plugin.groupId)) {
+                    groupId = mp.getValue();
+                } else if(mp.getUri().equals(ProjectUri.Build.Plugins.Plugin.artifactId)) {
+                    artifactId = mp.getValue();
+                } else if(mp.getUri().equals(ProjectUri.Build.Plugins.Plugin.version)) {
+                    version = mp.getValue();
+                }
+                //Add additional info if needed
+            }
+        }
+    }
+}