| /****************************************************************************** |
| * Copyright (c) 2010 Oracle |
| * 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: |
| * Konstantin Komissarchik - initial implementation and ongoing maintenance |
| ******************************************************************************/ |
| |
| package org.eclipse.wst.common.project.facet.core.internal; |
| |
| import static org.eclipse.wst.common.project.facet.core.internal.FacetCorePlugin.PLUGIN_ID; |
| import static org.eclipse.wst.common.project.facet.core.util.internal.PluginUtil.findExtensions; |
| import static org.eclipse.wst.common.project.facet.core.util.internal.PluginUtil.findRequiredAttribute; |
| import static org.eclipse.wst.common.project.facet.core.util.internal.PluginUtil.getTopLevelElements; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.wst.common.project.facet.core.IProjectFacet; |
| import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion; |
| import org.eclipse.wst.common.project.facet.core.util.internal.PluginUtil.InvalidExtensionException; |
| |
| /** |
| * Contains the logic for processing the <code>aliases</code> extension point. |
| * |
| * @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a> |
| */ |
| |
| public final class ProjectFacetAliasesExtensionPoint |
| { |
| public static final String EXTENSION_POINT_ID = "aliases"; //$NON-NLS-1$ |
| |
| private static final String EL_FACET_ALIAS = "facet-alias"; //$NON-NLS-1$ |
| private static final String EL_FACET_VERSION_ALIAS = "facet-version-alias"; //$NON-NLS-1$ |
| private static final String ATTR_ALIAS = "alias"; //$NON-NLS-1$ |
| private static final String ATTR_FACET = "facet"; //$NON-NLS-1$ |
| private static final String ATTR_VERSION = "version"; //$NON-NLS-1$ |
| |
| /* |
| * Note that the facetAliases and facetVersionAliases data structures hold strings rather |
| * than more specific IProjectFacet and IProjectFacetVersion objects. This is done this |
| * way as this class is called during initialization of FacetedProjectFramework and we need |
| * to avoid circular calls (this class cannot call back to FacetedProjectFramework). |
| */ |
| |
| private static Map<String,Set<String>> facetAliases = null; |
| private static Map<String,Map<String,Set<String>>> facetVersionAliases = null; |
| |
| public static Set<String> getAliases( final IProjectFacet f ) |
| { |
| readExtensions(); |
| |
| final Set<String> aliases = facetAliases.get( f.getId() ); |
| |
| if( aliases != null ) |
| { |
| return aliases; |
| } |
| |
| return Collections.emptySet(); |
| } |
| |
| public static Set<String> getAliases( final IProjectFacetVersion fv ) |
| { |
| readExtensions(); |
| |
| final Map<String,Set<String>> versionToAliasesMap = facetVersionAliases.get( fv.getProjectFacet().getId() ); |
| |
| if( versionToAliasesMap != null ) |
| { |
| final Set<String> aliases = versionToAliasesMap.get( fv.getVersionString() ); |
| |
| if( aliases != null ) |
| { |
| return aliases; |
| } |
| } |
| |
| return Collections.emptySet(); |
| } |
| |
| private static synchronized void readExtensions() |
| { |
| if( facetAliases != null ) |
| { |
| return; |
| } |
| |
| facetAliases = new HashMap<String,Set<String>>(); |
| facetVersionAliases = new HashMap<String,Map<String,Set<String>>>(); |
| |
| for( IConfigurationElement element |
| : getTopLevelElements( findExtensions( PLUGIN_ID, EXTENSION_POINT_ID ) ) ) |
| { |
| final String elname = element.getName(); |
| |
| try |
| { |
| if( elname.equals( EL_FACET_ALIAS ) || elname.equals( EL_FACET_VERSION_ALIAS ) ) |
| { |
| final String fid = findRequiredAttribute( element, ATTR_FACET ); |
| final String alias = findRequiredAttribute( element, ATTR_ALIAS ); |
| |
| if( elname.equals( EL_FACET_ALIAS ) ) |
| { |
| Set<String> aliases = facetAliases.get( fid ); |
| |
| if( aliases == null ) |
| { |
| aliases = new HashSet<String>(); |
| facetAliases.put( fid, aliases ); |
| } |
| |
| aliases.add( alias ); |
| } |
| else |
| { |
| final String fvstr = findRequiredAttribute( element, ATTR_VERSION ); |
| |
| Map<String,Set<String>> versionToAliasesMap = facetVersionAliases.get( fid ); |
| |
| if( versionToAliasesMap == null ) |
| { |
| versionToAliasesMap = new HashMap<String,Set<String>>(); |
| facetVersionAliases.put( fid, versionToAliasesMap ); |
| } |
| |
| Set<String> aliases = versionToAliasesMap.get( fvstr ); |
| |
| if( aliases == null ) |
| { |
| aliases = new HashSet<String>(); |
| versionToAliasesMap.put( fvstr, aliases ); |
| } |
| |
| aliases.add( alias ); |
| } |
| } |
| } |
| catch( InvalidExtensionException e ) |
| { |
| // Continue. The problem has been reported to the user via the log. |
| } |
| } |
| } |
| |
| } |