1 /******************************************************************************* 2 * Copyright (c) 2010, 2011 Sonatype, Inc. 3 * All rights reserved. This program and the accompanying materials 4 * are made available under the terms of the Eclipse Public License v1.0 5 * which accompanies this distribution, and is available at 6 * http://www.eclipse.org/legal/epl-v10.html 7 * 8 * Contributors: 9 * Sonatype, Inc. - initial API and implementation 10 *******************************************************************************/ 11 package org.eclipse.aether.metadata; 12 13 import java.io.File; 14 15 import org.eclipse.aether.RepositoryException; 16 17 /** 18 * A piece of metadata that needs to be merged with any current metadata before installation/deployment. 19 */ 20 public interface MergeableMetadata 21 extends Metadata 22 { 23 24 /** 25 * Merges this metadata into the current metadata (if any). Note that this method will be invoked regardless whether 26 * metadata currently exists or not. 27 * 28 * @param current The path to the current metadata file, may not exist but must not be {@code null}. 29 * @param result The path to the result file where the merged metadata should be stored, must not be {@code null}. 30 * @throws RepositoryException If the metadata could not be merged. 31 */ 32 void merge( File current, File result ) 33 throws RepositoryException; 34 35 /** 36 * Indicates whether this metadata has been merged. 37 * 38 * @return {@code true} if the metadata has been merged, {@code false} otherwise. 39 */ 40 boolean isMerged(); 41 42 }