+/*******************************************************************************
+ * Copyright (c) 2010, 2014 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.aether.collection;
+
+import org.eclipse.aether.RepositoryException;
+
+/**
+ * Thrown in case of bad artifact descriptors, version ranges or other issues encountered during calculation of the
+ * dependency graph.
+ */
+public class DependencyCollectionException
+ extends RepositoryException
+{
+
+ private final transient CollectResult result;
+
+ /**
+ * Creates a new exception with the specified result.
+ *
+ * @param result The collection result at the point the exception occurred, may be {@code null}.
+ */
+ public DependencyCollectionException( CollectResult result )
+ {
+ super( "Failed to collect dependencies for " + getSource( result ), getCause( result ) );
+ this.result = result;
+ }
+
+ /**
+ * Creates a new exception with the specified result and detail message.
+ *
+ * @param result The collection result at the point the exception occurred, may be {@code null}.
+ * @param message The detail message, may be {@code null}.
+ */
+ public DependencyCollectionException( CollectResult result, String message )
+ {
+ super( message, getCause( result ) );
+ this.result = result;
+ }
+
+ /**
+ * Creates a new exception with the specified result, detail message and cause.
+ *
+ * @param result The collection result at the point the exception occurred, may be {@code null}.
+ * @param message The detail message, may be {@code null}.
+ * @param cause The exception that caused this one, may be {@code null}.
+ */
+ public DependencyCollectionException( CollectResult result, String message, Throwable cause )
+ {
+ super( message, cause );
+ this.result = result;
+ }
+
+ /**
+ * Gets the collection result at the point the exception occurred. Despite being incomplete, callers might want to
+ * use this result to fail gracefully and continue their operation with whatever interim data has been gathered.
+ *
+ * @return The collection result or {@code null} if unknown.
+ */
+ public CollectResult getResult()
+ {
+ return result;
+ }
+
+ private static String getSource( CollectResult result )
+ {
+ if ( result == null )
+ {
+ return "";
+ }
+
+ CollectRequest request = result.getRequest();
+ if ( request.getRoot() != null )
+ {
+ return request.getRoot().toString();
+ }
+ if ( request.getRootArtifact() != null )
+ {
+ return request.getRootArtifact().toString();
+ }
+
+ return request.getDependencies().toString();
+ }
+
+ private static Throwable getCause( CollectResult result )
+ {
+ Throwable cause = null;
+ if ( result != null && !result.getExceptions().isEmpty() )
+ {
+ cause = result.getExceptions().get( 0 );
+ }
+ return cause;
+ }
+
+}