| /************************************************************************************* |
| * Copyright (c) 2011-2013 Red Hat, Inc. and others. |
| * 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: |
| * Fred Bricon (Red Hat, Inc.) - initial API and implementation |
| ************************************************************************************/ |
| package org.eclipse.m2e.wtp.facets; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.m2e.core.project.IMavenProjectFacade; |
| import org.eclipse.wst.common.project.facet.core.IProjectFacet; |
| import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Central class used to identify project Facets based on contributed {@link AbstractFacetDetector}s |
| * |
| * @author Fred Bricon |
| * @since 0.18.0 |
| */ |
| public class FacetDetectorManager { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(FacetDetectorManager.class); |
| |
| private static final FacetDetectorManager instance = new FacetDetectorManager(); |
| |
| private Map<String, List<AbstractFacetDetector>> facetDetectors = null; |
| |
| private FacetDetectorManager() { |
| } |
| |
| /** |
| * @return a singleton instance of {@link FacetDetectorManager} |
| */ |
| public static FacetDetectorManager getInstance() { |
| return instance; |
| } |
| |
| /** |
| * Inspects the given project to determine the {@link IProjectFacetVersion} of the given facetId. |
| * Facet detection is delegated to contributed {@link AbstractFacetDetector} strategies. |
| * If a detector fails to detect the corresponding Facet version or throws an error, the next detector is invoked, |
| * in order of its priority. |
| * |
| * @param mavenProjectFacade an {@link IMavenProjectFacade} instance |
| * @param facetId the id of the {@link IProjectFacet} to look for. |
| * @param monitor a progress monitor, can be <code>null</code>; |
| * @return an {@link IProjectFacetVersion} corresponding the facetId |
| * @throws CoreException |
| */ |
| public IProjectFacetVersion findFacetVersion(IMavenProjectFacade mavenProjectFacade, String facetId, IProgressMonitor monitor) throws CoreException { |
| return findFacetVersion(mavenProjectFacade, facetId, null, monitor); |
| } |
| |
| /** |
| * Inspects the given project to determine the {@link IProjectFacetVersion} of the given facetId. |
| * Facet detection is delegated to contributed {@link AbstractFacetDetector} strategies. |
| * If a detector fails to detect the corresponding Facet version or throws an error, the next detector is invoked, |
| * in order of its priority. An optional context map can be used by the different detectors to determine the facet version. |
| * |
| * @param mavenProjectFacade an {@link IMavenProjectFacade} instance |
| * @param facetId the id of the {@link IProjectFacet} to look for. |
| * @param context an optional context map, can be <code>null</code> |
| * @param monitor a progress monitor, can be <code>null</code>; |
| * @return an {@link IProjectFacetVersion} corresponding the facetId |
| * @throws CoreException |
| */ |
| public IProjectFacetVersion findFacetVersion(IMavenProjectFacade mavenProjectFacade, String facetId, Map<?, ?> context, IProgressMonitor monitor) throws CoreException { |
| if (facetId == null) { |
| return null; |
| } |
| List<AbstractFacetDetector> detectors = getFacetDetectors().get(facetId); |
| if (detectors == null || detectors.isEmpty()) { |
| return null; |
| } |
| IProjectFacetVersion version = null; |
| for (AbstractFacetDetector detector : detectors) { |
| if (monitor != null && monitor.isCanceled()) { |
| break; |
| } |
| try { |
| version = detector.findFacetVersion(mavenProjectFacade, context, monitor); |
| if (version != null) { |
| if (!facetId.equals(version.getProjectFacet().getId())) { |
| //throws exception |
| } |
| break; |
| } |
| } catch (CoreException ce) { |
| LOG.error(ce.getLocalizedMessage()); |
| } |
| } |
| return version; |
| } |
| |
| private Map<String, List<AbstractFacetDetector>> getFacetDetectors() { |
| if (facetDetectors == null) { |
| facetDetectors = FacetDetectorExtensionReader.readFacetDetectorExtensions(); |
| } |
| return facetDetectors; |
| } |
| |
| } |