add artifact not found diagnoser

git-svn-id: https://svn.apache.org/repos/asf/maven/components/trunk@307039 13f79535-47bb-0310-9956-ffa450edef68

maven-core/src/main/java/org/apache/maven/usability/ArtifactNotFoundDiagnoser.java

@@ -0,0 +1,61 @@
+package org.apache.maven.usability;
+
+/*
+ * Copyright 2001-2005 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import org.apache.maven.artifact.manager.WagonManager;
+import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
+
+public class ArtifactNotFoundDiagnoser
+    implements ErrorDiagnoser
+{
+
+    private WagonManager wagonManager;
+
+    public boolean canDiagnose( Throwable error )
+    {
+        return DiagnosisUtils.containsInCausality( error, ArtifactNotFoundException.class );
+    }
+
+    public String diagnose( Throwable error )
+    {
+        ArtifactNotFoundException exception = (ArtifactNotFoundException) DiagnosisUtils.getFromCausality( error,
+                                                                                                           ArtifactNotFoundException.class );
+
+        StringBuffer message = new StringBuffer();
+
+        message.append( "Failed to resolve artifact." );
+        message.append( "\n\n" );
+        message.append( exception.getMessage() );
+
+        if ( !wagonManager.isOnline() )
+        {
+            message.append( "\n" ).append( DiagnosisUtils.getOfflineWarning() );
+        }
+
+        Throwable root = DiagnosisUtils.getRootCause( exception );
+
+        if ( root != null )
+        {
+            message.append( "\nRoot Cause: " ).append( root.getMessage() );
+        }
+
+        message.append( "\n" );
+
+        return message.toString();
+    }
+
+}

maven-core/src/main/java/org/apache/maven/usability/ArtifactResolverDiagnoser.java

@@ -17,7 +17,6 @@ package org.apache.maven.usability;
  */
 
 import org.apache.maven.artifact.manager.WagonManager;
-import org.apache.maven.artifact.resolver.AbstractArtifactResolutionException;
 import org.apache.maven.artifact.resolver.ArtifactResolutionException;
 
 public class ArtifactResolverDiagnoser
@@ -28,13 +27,13 @@ public class ArtifactResolverDiagnoser
 
     public boolean canDiagnose( Throwable error )
     {
-        return DiagnosisUtils.containsInCausality( error, AbstractArtifactResolutionException.class );
+        return DiagnosisUtils.containsInCausality( error, ArtifactResolutionException.class );
     }
 
     public String diagnose( Throwable error )
     {
-        AbstractArtifactResolutionException exception = (AbstractArtifactResolutionException) DiagnosisUtils.getFromCausality(
-            error, ArtifactResolutionException.class );
+        ArtifactResolutionException exception = (ArtifactResolutionException) DiagnosisUtils.getFromCausality( error,
+                                                                                                               ArtifactResolutionException.class );
 
         StringBuffer message = new StringBuffer();
 

maven-core/src/main/resources/META-INF/plexus/components.xml

@@ -121,6 +121,21 @@
       <role-hint>PluginContainerDiagnoser</role-hint>
       <implementation>org.apache.maven.usability.PluginContainerDiagnoser</implementation>
     </component>
+    <!--
+    |
+    |ArtifactNotFoundDiagnoser
+    |
+    -->
+    <component>
+      <role>org.apache.maven.usability.ErrorDiagnoser</role>
+      <role-hint>ArtifactNotFoundDiagnoser</role-hint>
+      <implementation>org.apache.maven.usability.ArtifactNotFoundDiagnoser</implementation>
+      <requirements>
+        <requirement>
+          <role>org.apache.maven.artifact.manager.WagonManager</role>
+        </requirement>
+      </requirements>
+    </component>
     <!--
      |
      |ArtifactResolverDiagnoser

maven-plugins/maven-plugin-plugin/pom.xml

@@ -57,7 +57,7 @@
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-plugin-tools-java</artifactId>
-      <version>2.0-beta-3</version>
+      <version>2.0-beta-4-SNAPSHOT</version>
       <scope>runtime</scope>
     </dependency>
     <dependency>