| /****************************************************************************** |
| * Copyright (c) 2008 BEA Systems, 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: |
| * Konstantin Komissarchik - initial implementation and ongoing maintenance |
| ******************************************************************************/ |
| |
| package org.eclipse.wst.common.project.facet.core.util.internal; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.osgi.util.NLS; |
| import org.eclipse.wst.common.project.facet.core.DefaultVersionComparator; |
| import org.eclipse.wst.common.project.facet.core.IVersion; |
| import org.eclipse.wst.common.project.facet.core.internal.FacetCorePlugin; |
| import org.osgi.framework.Bundle; |
| |
| /** |
| * @author <a href="mailto:kosta@bea.com">Konstantin Komissarchik</a> |
| */ |
| |
| public abstract class Versionable<T extends IVersion> |
| { |
| private static final Comparator<String> DEFAULT_VERSION_COMPARATOR |
| = new DefaultVersionComparator(); |
| |
| protected final IndexedSet<String,T> versions; |
| private String versionComparatorClass; |
| private Comparator<String> versionComparator; |
| |
| public Versionable() |
| { |
| this.versions = new IndexedSet<String,T>(); |
| } |
| |
| public abstract String getPluginId(); |
| |
| public Set<T> getVersions() |
| { |
| return this.versions.getUnmodifiable(); |
| } |
| |
| public Set<T> getVersions( final String expr ) |
| |
| throws CoreException |
| |
| { |
| final VersionExpr<T> prepared = new VersionExpr<T>( this, expr, null ); |
| final Set<T> result = new HashSet<T>(); |
| |
| for( T ver : this.versions ) |
| { |
| if( prepared.check( ver ) ) |
| { |
| result.add( ver ); |
| } |
| } |
| |
| return result; |
| } |
| |
| public T getVersion( final String version ) |
| { |
| final T ver = this.versions.get( version ); |
| |
| if( ver == null ) |
| { |
| throw new IllegalArgumentException( createVersionNotFoundErrMsg( version ) ); |
| } |
| |
| return ver; |
| } |
| |
| @SuppressWarnings( "unchecked" ) |
| public T getLatestVersion() |
| { |
| if( this.versions.size() > 0 ) |
| { |
| return Collections.max( this.versions ); |
| } |
| else |
| { |
| return null; |
| } |
| } |
| |
| public boolean hasVersion( final String version ) |
| { |
| return this.versions.containsKey( version ); |
| } |
| |
| public List<T> getSortedVersions( final boolean ascending ) |
| { |
| Comparator<T> comp; |
| |
| if( ascending ) |
| { |
| comp = null; |
| } |
| else |
| { |
| comp = new Comparator<T>() |
| { |
| @SuppressWarnings( "unchecked" ) |
| public int compare( final T ver1, |
| final T ver2 ) |
| { |
| return ver1.compareTo( ver2 ) * -1; |
| } |
| }; |
| } |
| |
| final List<T> list = new ArrayList<T>( this.versions ); |
| Collections.sort( list, comp ); |
| |
| return list; |
| } |
| |
| @SuppressWarnings( "unchecked" ) |
| public Comparator<String> getVersionComparator() |
| |
| throws CoreException |
| |
| { |
| Comparator<String> comp; |
| |
| if( this.versionComparatorClass == null ) |
| { |
| comp = DEFAULT_VERSION_COMPARATOR; |
| } |
| else |
| { |
| if( this.versionComparator == null ) |
| { |
| final Bundle bundle = Platform.getBundle( getPluginId() ); |
| |
| try |
| { |
| final Class cl |
| = bundle.loadClass( this.versionComparatorClass ); |
| |
| this.versionComparator = (Comparator<String>) cl.newInstance(); |
| } |
| catch( Exception e ) |
| { |
| final String msg |
| = NLS.bind( Resources.failedToCreate, |
| this.versionComparatorClass ); |
| |
| final IStatus st |
| = FacetCorePlugin.createErrorStatus( msg, e ); |
| |
| throw new CoreException( st ); |
| } |
| } |
| |
| comp = this.versionComparator; |
| } |
| |
| return comp; |
| } |
| |
| public void setVersionComparator( final String clname ) |
| { |
| this.versionComparatorClass = clname; |
| } |
| |
| public abstract String createVersionNotFoundErrMsg( String verstr ); |
| |
| private static final class Resources |
| |
| extends NLS |
| |
| { |
| public static String failedToCreate; |
| |
| static |
| { |
| initializeMessages( Versionable.class.getName(), |
| Resources.class ); |
| } |
| } |
| |
| } |