--- /dev/null
+/*******************************************************************************
+ * 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.resolution;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.eclipse.aether.RepositoryException;
+import org.eclipse.aether.transfer.ArtifactNotFoundException;
+import org.eclipse.aether.transfer.RepositoryOfflineException;
+
+/**
+ * Thrown in case of a unresolvable artifacts.
+ */
+public class ArtifactResolutionException
+ extends RepositoryException
+{
+
+ private final transient List<ArtifactResult> results;
+
+ /**
+ * Creates a new exception with the specified results.
+ *
+ * @param results The resolution results at the point the exception occurred, may be {@code null}.
+ */
+ public ArtifactResolutionException( List<ArtifactResult> results )
+ {
+ super( getMessage( results ), getCause( results ) );
+ this.results = ( results != null ) ? results : Collections.<ArtifactResult> emptyList();
+ }
+
+ /**
+ * Creates a new exception with the specified results and detail message.
+ *
+ * @param results The resolution results at the point the exception occurred, may be {@code null}.
+ * @param message The detail message, may be {@code null}.
+ */
+ public ArtifactResolutionException( List<ArtifactResult> results, String message )
+ {
+ super( message, getCause( results ) );
+ this.results = ( results != null ) ? results : Collections.<ArtifactResult> emptyList();
+ }
+
+ /**
+ * Creates a new exception with the specified results, detail message and cause.
+ *
+ * @param results The resolution results 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 ArtifactResolutionException( List<ArtifactResult> results, String message, Throwable cause )
+ {
+ super( message, cause );
+ this.results = ( results != null ) ? results : Collections.<ArtifactResult> emptyList();
+ }
+
+ /**
+ * Gets the resolution results at the point the exception occurred. Despite being incomplete, callers might want to
+ * use these results to fail gracefully and continue their operation with whatever interim data has been gathered.
+ *
+ * @return The resolution results or {@code null} if unknown.
+ */
+ public List<ArtifactResult> getResults()
+ {
+ return results;
+ }
+
+ /**
+ * Gets the first result from {@link #getResults()}. This is a convenience method for cases where callers know only
+ * a single result/request is involved.
+ *
+ * @return The (first) resolution result or {@code null} if none.
+ */
+ public ArtifactResult getResult()
+ {
+ return ( results != null && !results.isEmpty() ) ? results.get( 0 ) : null;
+ }
+
+ private static String getMessage( List<? extends ArtifactResult> results )
+ {
+ StringBuilder buffer = new StringBuilder( 256 );
+
+ buffer.append( "The following artifacts could not be resolved: " );
+
+ int unresolved = 0;
+
+ String sep = "";
+ for ( ArtifactResult result : results )
+ {
+ if ( !result.isResolved() )
+ {
+ unresolved++;
+
+ buffer.append( sep );
+ buffer.append( result.getRequest().getArtifact() );
+ sep = ", ";
+ }
+ }
+
+ Throwable cause = getCause( results );
+ if ( cause != null )
+ {
+ if ( unresolved == 1 )
+ {
+ buffer.setLength( 0 );
+ buffer.append( cause.getMessage() );
+ }
+ else
+ {
+ buffer.append( ": " ).append( cause.getMessage() );
+ }
+ }
+
+ return buffer.toString();
+ }
+
+ private static Throwable getCause( List<? extends ArtifactResult> results )
+ {
+ for ( ArtifactResult result : results )
+ {
+ if ( !result.isResolved() )
+ {
+ Throwable notFound = null, offline = null;
+ for ( Throwable t : result.getExceptions() )
+ {
+ if ( t instanceof ArtifactNotFoundException )
+ {
+ if ( notFound == null )
+ {
+ notFound = t;
+ }
+ if ( offline == null && t.getCause() instanceof RepositoryOfflineException )
+ {
+ offline = t;
+ }
+ }
+ else
+ {
+ return t;
+ }
+
+ }
+ if ( offline != null )
+ {
+ return offline;
+ }
+ if ( notFound != null )
+ {
+ return notFound;
+ }
+ }
+ }
+ return null;
+ }
+
+}