X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.export.core%2Fsrc%2Forg%2Fsimantics%2Fexport%2Fcore%2Fimpl%2FExportExtensionPointImpl.java;h=f2106bbc4ec148ccf5aa032e4a8394ca8f66868a;hb=e358219a999d271f489dc6e3821aa9b76b2d39fe;hp=c87bfa79b87c60a85aa0fd39b672e32f452180e3;hpb=969bd23cab98a79ca9101af33334000879fb60c5;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.export.core/src/org/simantics/export/core/impl/ExportExtensionPointImpl.java b/bundles/org.simantics.export.core/src/org/simantics/export/core/impl/ExportExtensionPointImpl.java
index c87bfa79b..f2106bbc4 100644
--- a/bundles/org.simantics.export.core/src/org/simantics/export/core/impl/ExportExtensionPointImpl.java
+++ b/bundles/org.simantics.export.core/src/org/simantics/export/core/impl/ExportExtensionPointImpl.java
@@ -1,751 +1,751 @@
-package org.simantics.export.core.impl;
-
-import java.io.File;
-import java.lang.ref.WeakReference;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Comparator;
-import java.util.List;
-import java.util.Map;
-
-import org.eclipse.core.runtime.CoreException;
-import org.eclipse.core.runtime.IConfigurationElement;
-import org.eclipse.core.runtime.Platform;
-import org.eclipse.jface.resource.ImageDescriptor;
-import org.osgi.service.prefs.Preferences;
-import org.simantics.databoard.binding.mutable.Variant;
-import org.simantics.databoard.type.RecordType;
-import org.simantics.export.core.ExportContext;
-import org.simantics.export.core.ExportExtensionPoint;
-import org.simantics.export.core.error.ExportException;
-import org.simantics.export.core.intf.ContentType;
-import org.simantics.export.core.intf.ContentTypeAction;
-import org.simantics.export.core.intf.DiscoverAction;
-import org.simantics.export.core.intf.Discoverer;
-import org.simantics.export.core.intf.ExportClass;
-import org.simantics.export.core.intf.Exporter;
-import org.simantics.export.core.intf.Format;
-import org.simantics.export.core.intf.FormatClass;
-import org.simantics.export.core.intf.IconResolver;
-import org.simantics.export.core.intf.ImportAction;
-import org.simantics.export.core.intf.Importer;
-import org.simantics.export.core.intf.Publisher;
-import org.simantics.export.core.intf.PublisherClass;
-import org.simantics.export.core.manager.Content;
-import org.simantics.utils.datastructures.ToStringComparator;
-
-/**
- * Light-weight registry implementation to export extension point.
- *
- * @author toni.kalajainen@semantum.fi
- */
-public class ExportExtensionPointImpl implements ExportExtensionPoint {
-
-	public static final String EP = "org.simantics.export.core.export";
-	
-	Importer[] importers = createImporters();
-	Exporter[] exporters = createExporters();
-	Format[] formats = createFormats();
-	ContentType[] contentTypes = createContentTypes();
-	Discoverer[] discoverers = createDiscoverers();
-	Publisher[] publishers = createPublishers();
-	
-	public ExportExtensionPointImpl() {}
-
-	public Discoverer[] getDiscoverers(String contentTypeId) {
-		int count = 0;
-		for ( Discoverer discoverer : discoverers ) {
-			if ( contentTypeId.equals( discoverer.contentTypeId() ) ) count++;
-		}
-		
-		Discoverer[] result = new Discoverer[ count ];
-		int i = 0;
-		for ( Discoverer discoverer : discoverers ) {
-			if ( contentTypeId.equals( discoverer.contentTypeId() ) ) {				
-				result[ i++ ] = discoverer;
-			}
-		}
-		return result;
-		
-	}
-	
-	public Format getFormat(String formatId) 
-	{
-		for ( Format format : formats ) {
-			if ( formatId.equals( format.id() ) ) return format;
-		}
-		return null;
-	}
-
-	@Override
-	public Format getFormatByExt(String fileExt) {
-		for ( Format format : formats ) {
-			if ( fileExt.equals( format.fileext() ) ) return format;
-		}
-		return null;
-	}	
-	public ContentType getContentType(String contentTypeId) 
-			//throws ExportException 
-	{
-		for ( ContentType contentType : contentTypes ) {
-			if ( contentTypeId.equals( contentType.id() ) ) return contentType;
-		}
-		//throw new ExportException("ContentType "+contentTypeId+" does not exist");
-		return null;
-	}
-	
-	public Importer getImporter(String formatId) 
-			//throws ExportException 
-	{
-		for ( Importer importer : importers ) {
-			if ( formatId.equals( importer.formatId() ) ) return importer;
-		}
-		//throw new ExportException("Importer "+formatId+" does not exist");
-		return null;
-	}
-	
-	public Exporter[] getExporters(String formatId, String contentTypeId) 
-	{
-		int count = 0;
-		for ( Exporter exporter : exporters ) {
-			if ( exporter.formatId().equals(formatId) &&
-			     exporter.contentTypeId().equals(contentTypeId) ) count++;
-		}
-		Exporter[] result = new Exporter[ count ];
-		int index = 0;
-		for ( Exporter exporter : exporters ) {
-			if ( formatId.equals( exporter.formatId() ) && contentTypeId.equals( exporter.contentTypeId() ) ) {
-				result[ index++ ] = exporter;
-			}
-		}
-		
-		return result;
-	}
-	
-	public Exporter[] getExportersForContentType(String contentTypeId) 
-			//throws ExportException 
-	{
-		int count = 0;
-		for ( Exporter exporter : exporters ) {
-			if ( contentTypeId.equals( exporter.contentTypeId() ) ) count++;
-		}
-		
-		Exporter[] result = new Exporter[ count ];
-		int i = 0;
-		for ( Exporter exporter : exporters ) {
-			if ( contentTypeId.equals( exporter.contentTypeId() ) ) {
-				result[ i++ ] = exporter;
-			}
-		}
-		
-		Arrays.sort(result, exporterPrioritySorter);
-		
-		return result;
-	}
-
-	public Exporter[] getExportersForFormat(String formatId) 
-	{
-		int count = 0;
-		for ( Exporter exporter : exporters ) {
-			if ( formatId.equals( exporter.formatId() ) ) count++;
-		}
-		
-		Exporter[] result = new Exporter[ count ];
-		int i = 0;
-		for ( Exporter exporter : exporters ) {
-			if ( formatId.equals( exporter.formatId() ) ) {
-				result[ i++ ] = exporter;
-			}
-		}
-		
-		Arrays.sort(result, exporterPrioritySorter);
-		
-		return result;
-	}
-	
-	public Publisher getPublisher(String publisherId) {
-		for ( Publisher publisher : publishers ) {
-			if ( publisherId.equals( publisher.id() ) ) return publisher;
-		}
-		return null;
-	};
-	
-	public int getPublisherIndex(String publisherId) {
-		for (int i=0; i<publishers.length; i++) {
-			if ( publisherId.equals( publishers[i].id() ) ) return i;
-		}
-		return -1;
-	}
-	
-	public Publisher getPublisherByLabel(String publisherLabel) {
-		for ( Publisher publisher : publishers ) {
-			if ( publisher.label().equals(publisherLabel ) ) return publisher;
-		}
-		return null;
-	}
-	
-	ContentType[] createContentTypes() {
-		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
-		int count = 0;
-		for (IConfigurationElement ce : ces) {
-			if ( "content_type".equals(ce.getName() ) ) count++;			
-		}
-		
-		ContentType[] result = new ContentType[count];
-		int i=0;
-		for (IConfigurationElement ce : ces) {
-			if ( "content_type".equals(ce.getName() ) ) {
-				result[i++] = new ContentTypeImpl( ce );
-			}
-		}
-		
-		return result;
-	}
-
-	Discoverer[] createDiscoverers() {
-		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
-		int count = 0;
-		for (IConfigurationElement ce : ces) {
-			if ( "discoverer".equals(ce.getName() ) ) count++;			
-		}
-		
-		Discoverer[] result = new Discoverer[count];
-		int i=0;
-		for (IConfigurationElement ce : ces) {
-			if ( "discoverer".equals(ce.getName() ) ) {
-				result[i++] = new DiscovererImpl( ce );
-			}
-		}
-		
-		return result;
-	}
-		
-	Format[] createFormats() {
-		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
-		int count = 0;
-		for (IConfigurationElement ce : ces) {
-			if ( "format".equals(ce.getName() ) ) count++;			
-		}
-		
-		Format[] result = new Format[count];
-		int i=0;
-		for (IConfigurationElement ce : ces) {
-			if ( "format".equals(ce.getName() ) ) {
-				result[i++] = new FormatImpl( ce );
-			}
-		}
-		
-		return result;
-	}
-	
-	Exporter[] createExporters() {
-		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
-		int count = 0;
-		for (IConfigurationElement ce : ces) {
-			if ( "exporter".equals(ce.getName() ) ) count++;			
-		}
-		
-		Exporter[] result = new Exporter[count];
-		int i=0;
-		for (IConfigurationElement ce : ces) {
-			if ( "exporter".equals(ce.getName() ) ) {
-				result[i++] = new ExporterImpl( ce );
-			}
-		}
-		
-		return result;
-	}
-	
-	Importer[] createImporters() {
-		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
-		int count = 0;
-		for (IConfigurationElement ce : ces) {
-			if ( "importer".equals(ce.getName() ) ) count++;			
-		}
-		
-		Importer[] result = new Importer[count];
-		int i=0;
-		for (IConfigurationElement ce : ces) {
-			if ( "importer".equals(ce.getName() ) ) {
-				result[i++] = new ImporterImpl( ce );
-			}
-		}
-		
-		return result;
-	}
-	
-	Publisher[] createPublishers() {
-		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
-		int count = 0;
-		for (IConfigurationElement ce : ces) {
-			if ( "publisher".equals(ce.getName() ) ) count++;			
-		}
-		
-		Publisher[] result = new Publisher[count];
-		int i=0;
-		for (IConfigurationElement ce : ces) {
-			if ( "publisher".equals(ce.getName() ) ) {
-				result[i++] = new PublisherImpl( ce );
-			}
-		}
-		
-		Arrays.sort(result, new ToStringComparator.ByLength());
-		
-		return result;
-	}
-	
-	static class ContentTypeImpl implements ContentType {
-		IConfigurationElement ce;
-		ContentTypeAction action;
-		WeakReference<IconResolver> resolverCache = null;
-		boolean invalidIconResolver = false;
-
-		public ContentTypeImpl(IConfigurationElement ce) {
-			this.ce = ce;
-		}
-		
-		ContentTypeAction getOrCreate() throws ExportException {
-			if ( action == null ) {
-				try {
-					String value = ce.getAttribute("contentTypeAction");
-					if ( value == null ) return new DefaultContentTypeAction();
-					action = (ContentTypeAction) ce.createExecutableExtension("contentTypeAction");
-				} catch (CoreException e) {
-					throw new ExportException( e );
-				} 
-			}
-			return action;
-		}		
-
-		@Override
-		public String id() {			
-			return ce.getAttribute("id");
-		}
-
-		@Override
-		public String label() {
-			return ce.getAttribute("label");
-		}
-
-		@Override
-		public String plural() {
-			return ce.getAttribute("plural");
-		}
-
-		public ImageDescriptor icon(String contentUri) {
-			if (!invalidIconResolver && ce.getAttribute("iconResolver") != null) {
-				try {
-					IconResolver resolver = resolverCache != null ? resolverCache.get() : null;
-					if (resolver == null) {
-						resolver = (IconResolver) ce.createExecutableExtension("iconResolver");
-						resolverCache = new WeakReference<IconResolver>(resolver);
-					}
-					return resolver.get(contentUri);
-				} catch (CoreException e) {
-					// Invalid iconResolver, could not instantiate.
-					// Don't try to resolve it anymore if it fails once.
-					invalidIconResolver = true;
-					return null;
-				}
-			}
-			return icon();
-		}
-		
-		@Override
-		public ImageDescriptor icon() {
-			try {
-				String _url = ce.getAttribute("icon");
-				URL url = new URL(_url);
-				return ImageDescriptor.createFromURL(url);
-			} catch (MalformedURLException e) {
-				return null;
-			}
-		}
-
-		@Override
-		public boolean isModel() {
-			return "true".equalsIgnoreCase(ce.getAttribute("model"));
-		}
-		
-		@Override
-		public String toString() {
-			return "ContentType, id="+id()+", label="+label();
-		}
-
-		@Override
-		public Map<String, String> getLabels(ExportContext ctx, Collection<String> contents) throws ExportException {
-			ContentTypeAction action = getOrCreate();
-			return action.getLabels(ctx, contents);
-		}
-		
-	}
-	
-	static class DiscovererImpl implements Discoverer {
-		IConfigurationElement ce;
-		DiscoverAction action;
-
-		public DiscovererImpl(IConfigurationElement ce) {
-			this.ce = ce;
-		}
-
-		@Override
-		public String contentTypeId() {
-			return ce.getAttribute("content_type_id");
-		}
-		
-		DiscoverAction getOrCreate() throws ExportException {
-			if ( action == null ) {
-				try {
-					action = (DiscoverAction) ce.createExecutableExtension("discoverAction");
-				} catch (CoreException e) {
-					throw new ExportException( e );
-				} 
-			}
-			return action;
-		}
-
-//		public Read<Collection<String>> discoverRequest(
-//				Collection<String> startLocations) throws ExportException {
-//			return getOrCreate().discoverRequest(startLocations);
-//		}
-		
-		@Override
-		public String toString() {
-			try {
-				return "Discoverer, contentTypeId="+contentTypeId()+", class="+getOrCreate().getClass().getCanonicalName();
-			} catch (ExportException e) {
-				return "Discoverer, contentTypeId="+contentTypeId();
-			}
-		}
-
-		@Override
-		public Collection<String> discoverContent(ExportContext ctx, Collection<String> startLocations) throws ExportException {
-			return getOrCreate().discoverContent(ctx, startLocations);
-		}
-		
-	}
-
-	static class ExporterImpl implements Exporter {
-		IConfigurationElement ce;
-		ExportClass action;
-		int priority = 0;
-
-		public ExporterImpl(IConfigurationElement ce) {
-			this.ce = ce;
-			String priorityStr = ce.getAttribute("exportPriority");
-			if ( priorityStr!=null ) priority = Integer.valueOf(priorityStr);
-		}
-
-		ExportClass getOrCreate() throws ExportException {
-			if ( action == null ) {
-				try {
-					action = (ExportClass) ce.createExecutableExtension("exportAction");
-				} catch (CoreException e) {
-					throw new ExportException( e );
-				} 
-			}
-			return action;
-		}
-		
-		@Override
-		public String formatId() {			
-			return ce.getAttribute("formatId");
-		}
-		
-		@Override
-		public String contentTypeId() {
-			return ce.getAttribute("content_type_id");
-		}
-
-		@Override
-		public ExportClass exportAction() throws ExportException {
-			return getOrCreate();
-		}
-		
-		@Override
-		public String toString() {
-			try {
-				return "Exporter, formatId="+formatId()+", contentTypeId="+contentTypeId()+", class="+getOrCreate().getClass().getCanonicalName();
-			} catch (ExportException e) {
-				return "Exporter, formatId="+formatId()+", contentTypeId="+contentTypeId();
-			}
-		}
-
-		@Override
-		public int getExportPriority() {
-			return priority;
-		}
-		
-	}
-
-	static class ImporterImpl implements Importer {
-		IConfigurationElement ce;
-
-		public ImporterImpl(IConfigurationElement ce) {
-			this.ce = ce;
-		}
-
-		@Override
-		public String formatId() {			
-			return ce.getAttribute("formatId");
-		}
-		
-		@Override
-		public String contentTypeId() {
-			return ce.getAttribute("content_type_id");
-		}
-
-		@Override
-		public ImportAction importAction() throws ExportException {
-			try {
-				return (ImportAction) ce.createExecutableExtension("exportAction");
-			} catch (CoreException e) {
-				throw new ExportException(e);
-			}
-		}
-		
-		@Override
-		public String toString() {
-			return "Importer, formatId="+formatId()+", contentTypeId="+contentTypeId();
-		}
-		
-	}
-	
-	
-	static class FormatImpl implements Format {
-		IConfigurationElement ce;
-		FormatClass formatClass;
-
-		public FormatImpl(IConfigurationElement ce) {
-			this.ce = ce;
-		}
-		
-		FormatClass getOrCreateFormatClass() throws ExportException {
-			if ( formatClass == null ) {
-				try {
-					formatClass = (FormatClass) ce.createExecutableExtension("formatClass");
-				} catch (CoreException e) {
-					e.printStackTrace();				
-					throw new ExportException( e );
-				} 
-			}
-			return formatClass;
-		}
-
-		@Override
-		public String id() {			
-			return ce.getAttribute("id");
-		}
-
-		@Override
-		public String label() {
-			return ce.getAttribute("label");
-		}
-
-		@Override
-		public String plural() {
-			return ce.getAttribute("plural");
-		}
-
-		@Override
-		public ImageDescriptor icon() {
-			try {
-				String _url = ce.getAttribute("icon");
-				URL url = new URL(_url);
-				return ImageDescriptor.createFromURL(url);
-			} catch (MalformedURLException e) {
-				return null;
-			}
-		}
-
-		@Override
-		public String fileext() {
-			return ce.getAttribute("fileext");		
-		}
-
-		@Override
-		public Class<?> writerClass() throws ClassNotFoundException {
-			String className = ce.getAttribute("writerClass");
-			return Class.forName(className);
-		}
-
-		@Override
-		public Class<?> readerClass() throws ClassNotFoundException {
-			String className = ce.getAttribute("readerClass");
-			return Class.forName(className);
-		}
-
-		@Override
-		public boolean isGroupFormat() {			
-			return "true".equals(ce.getAttribute("isGroupFormat"));
-		}
-		
-		@Override
-		public boolean isContainerFormat() {
-			return "true".equals(ce.getAttribute("isContainerFormat"));
-		}
-		
-		@Override
-		public boolean isAttachable() {
-			return "true".equals(ce.getAttribute("isAttachable"));
-		}		
-
-		@Override
-		public boolean mergeGroupFormatDefault() {
-			return "true".equals(ce.getAttribute("mergeGroupDefault"));		
-		}
-
-		@Override
-		public boolean isAlwaysPublished() {
-			return "true".equals(ce.getAttribute("isAlwaysPublished"));
-		}
-
-		@Override
-		public boolean isLinkContainer() {
-			return "true".equals(ce.getAttribute("isLinkContainer"));
-		}	
-		@Override
-		public RecordType options( ExportContext context ) throws ExportException {
-			return getOrCreateFormatClass().options(context);
-		}
-
-		@Override
-		public List<String> validate(ExportContext context, Variant options) throws ExportException {
-			return getOrCreateFormatClass().validate(context, options);
-		}
-		
-		@Override
-		public void fillDefaultPrefs( ExportContext ctx, Variant options ) throws ExportException {
-			getOrCreateFormatClass().fillDefaultPrefs( ctx, options );
-		}
-
-
-		@Override
-		public String toString() {			
-			try {
-				return "Format, id="+id()+", fileext="+fileext()+", label="+label()+", class="+getOrCreateFormatClass().getClass().getCanonicalName();
-			} catch (ExportException e) {
-				return "Format, id="+id()+", fileext="+fileext()+", label="+label();
-			}			
-		}
-
-		@Override
-		public Object createFile(ExportContext context, File outputFile, Variant options) throws ExportException {
-			return getOrCreateFormatClass().createFile(context, outputFile, options);
-		}
-
-		@Override
-		public Object openFile(ExportContext context, File inputFile, Variant options) throws ExportException {
-			return getOrCreateFormatClass().openFile(context, inputFile, options);
-		}
-		
-		@Override
-		public void closeFile(ExportContext context, Object handle) throws ExportException {
-			getOrCreateFormatClass().closeFile(context, handle);
-		}
-
-		@Override
-		public void addAttachment(ExportContext context, Object handle, List<Content> attachments) throws ExportException {
-			getOrCreateFormatClass().addAttachment(context, handle, attachments);
-		}
-		
-		@Override
-		public FormatClass formatActions() throws ExportException {
-			return getOrCreateFormatClass();
-		}
-
-		@Override
-		public void savePref(Variant options, Preferences contentScopeNode, Preferences workbenchScopeNode) throws ExportException {
-			getOrCreateFormatClass().savePref(options, contentScopeNode, workbenchScopeNode);
-		}
-
-		@Override
-		public void loadPref(Variant options, Preferences contentScopeNode, Preferences workbenchScopeNode) throws ExportException {
-			getOrCreateFormatClass().loadPref(options, contentScopeNode, workbenchScopeNode);			
-		}
-
-	}
-	
-	public static class PublisherImpl implements Publisher {
-
-		IConfigurationElement ce;
-		PublisherClass publisherClass;
-
-		public PublisherImpl(IConfigurationElement ce) {
-			this.ce = ce;
-		}
-		
-		PublisherClass getOrCreatePublisherClass() throws ExportException {
-			if ( publisherClass == null ) {
-				try {
-					publisherClass = (PublisherClass) ce.createExecutableExtension("publisherClass");
-				} catch (CoreException e) {
-					e.printStackTrace();				
-					throw new ExportException( e );
-				} 
-			}
-			return publisherClass;
-		}
-		
-		@Override
-		public String id() {
-			return ce.getAttribute("id");
-		}
-
-		@Override
-		public String label() {
-			return ce.getAttribute("label");
-		}
-
-		@Override
-		public org.simantics.export.core.intf.PublisherClass publisherClass() throws ExportException {
-			return getOrCreatePublisherClass();
-		}
-		
-		@Override
-		public String toString() {
-			return label();
-		}
-		
-	}
-
-	@Override
-	public ContentType[] contentTypes() {
-		return contentTypes;
-	}
-
-	@Override
-	public Discoverer[] discoverers() {
-		return discoverers;
-	}
-
-	@Override
-	public Format[] formats() {
-		return formats;
-	}
-
-	@Override
-	public Importer[] importers() {
-		return importers;
-	}
-
-	@Override
-	public Exporter[] exporters() {
-		return exporters;
-	}
-	
-	public Publisher[] publishers() {
-		return publishers;
-	};
-	
-	Comparator<Exporter> exporterPrioritySorter = new Comparator<Exporter>() {
-		@Override
-		public int compare(Exporter o1, Exporter o2) {			
-			return Integer.signum( o2.getExportPriority() - o1.getExportPriority() );
-		}
-	};
-
-	
-}
+package org.simantics.export.core.impl;
+
+import java.io.File;
+import java.lang.ref.WeakReference;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Map;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.jface.resource.ImageDescriptor;
+import org.osgi.service.prefs.Preferences;
+import org.simantics.databoard.binding.mutable.Variant;
+import org.simantics.databoard.type.RecordType;
+import org.simantics.export.core.ExportContext;
+import org.simantics.export.core.ExportExtensionPoint;
+import org.simantics.export.core.error.ExportException;
+import org.simantics.export.core.intf.ContentType;
+import org.simantics.export.core.intf.ContentTypeAction;
+import org.simantics.export.core.intf.DiscoverAction;
+import org.simantics.export.core.intf.Discoverer;
+import org.simantics.export.core.intf.ExportClass;
+import org.simantics.export.core.intf.Exporter;
+import org.simantics.export.core.intf.Format;
+import org.simantics.export.core.intf.FormatClass;
+import org.simantics.export.core.intf.IconResolver;
+import org.simantics.export.core.intf.ImportAction;
+import org.simantics.export.core.intf.Importer;
+import org.simantics.export.core.intf.Publisher;
+import org.simantics.export.core.intf.PublisherClass;
+import org.simantics.export.core.manager.Content;
+import org.simantics.utils.datastructures.ToStringComparator;
+
+/**
+ * Light-weight registry implementation to export extension point.
+ *
+ * @author toni.kalajainen@semantum.fi
+ */
+public class ExportExtensionPointImpl implements ExportExtensionPoint {
+
+	public static final String EP = "org.simantics.export.core.export";
+	
+	Importer[] importers = createImporters();
+	Exporter[] exporters = createExporters();
+	Format[] formats = createFormats();
+	ContentType[] contentTypes = createContentTypes();
+	Discoverer[] discoverers = createDiscoverers();
+	Publisher[] publishers = createPublishers();
+	
+	public ExportExtensionPointImpl() {}
+
+	public Discoverer[] getDiscoverers(String contentTypeId) {
+		int count = 0;
+		for ( Discoverer discoverer : discoverers ) {
+			if ( contentTypeId.equals( discoverer.contentTypeId() ) ) count++;
+		}
+		
+		Discoverer[] result = new Discoverer[ count ];
+		int i = 0;
+		for ( Discoverer discoverer : discoverers ) {
+			if ( contentTypeId.equals( discoverer.contentTypeId() ) ) {				
+				result[ i++ ] = discoverer;
+			}
+		}
+		return result;
+		
+	}
+	
+	public Format getFormat(String formatId) 
+	{
+		for ( Format format : formats ) {
+			if ( formatId.equals( format.id() ) ) return format;
+		}
+		return null;
+	}
+
+	@Override
+	public Format getFormatByExt(String fileExt) {
+		for ( Format format : formats ) {
+			if ( fileExt.equals( format.fileext() ) ) return format;
+		}
+		return null;
+	}	
+	public ContentType getContentType(String contentTypeId) 
+			//throws ExportException 
+	{
+		for ( ContentType contentType : contentTypes ) {
+			if ( contentTypeId.equals( contentType.id() ) ) return contentType;
+		}
+		//throw new ExportException("ContentType "+contentTypeId+" does not exist");
+		return null;
+	}
+	
+	public Importer getImporter(String formatId) 
+			//throws ExportException 
+	{
+		for ( Importer importer : importers ) {
+			if ( formatId.equals( importer.formatId() ) ) return importer;
+		}
+		//throw new ExportException("Importer "+formatId+" does not exist");
+		return null;
+	}
+	
+	public Exporter[] getExporters(String formatId, String contentTypeId) 
+	{
+		int count = 0;
+		for ( Exporter exporter : exporters ) {
+			if ( exporter.formatId().equals(formatId) &&
+			     exporter.contentTypeId().equals(contentTypeId) ) count++;
+		}
+		Exporter[] result = new Exporter[ count ];
+		int index = 0;
+		for ( Exporter exporter : exporters ) {
+			if ( formatId.equals( exporter.formatId() ) && contentTypeId.equals( exporter.contentTypeId() ) ) {
+				result[ index++ ] = exporter;
+			}
+		}
+		
+		return result;
+	}
+	
+	public Exporter[] getExportersForContentType(String contentTypeId) 
+			//throws ExportException 
+	{
+		int count = 0;
+		for ( Exporter exporter : exporters ) {
+			if ( contentTypeId.equals( exporter.contentTypeId() ) ) count++;
+		}
+		
+		Exporter[] result = new Exporter[ count ];
+		int i = 0;
+		for ( Exporter exporter : exporters ) {
+			if ( contentTypeId.equals( exporter.contentTypeId() ) ) {
+				result[ i++ ] = exporter;
+			}
+		}
+		
+		Arrays.sort(result, exporterPrioritySorter);
+		
+		return result;
+	}
+
+	public Exporter[] getExportersForFormat(String formatId) 
+	{
+		int count = 0;
+		for ( Exporter exporter : exporters ) {
+			if ( formatId.equals( exporter.formatId() ) ) count++;
+		}
+		
+		Exporter[] result = new Exporter[ count ];
+		int i = 0;
+		for ( Exporter exporter : exporters ) {
+			if ( formatId.equals( exporter.formatId() ) ) {
+				result[ i++ ] = exporter;
+			}
+		}
+		
+		Arrays.sort(result, exporterPrioritySorter);
+		
+		return result;
+	}
+	
+	public Publisher getPublisher(String publisherId) {
+		for ( Publisher publisher : publishers ) {
+			if ( publisherId.equals( publisher.id() ) ) return publisher;
+		}
+		return null;
+	};
+	
+	public int getPublisherIndex(String publisherId) {
+		for (int i=0; i<publishers.length; i++) {
+			if ( publisherId.equals( publishers[i].id() ) ) return i;
+		}
+		return -1;
+	}
+	
+	public Publisher getPublisherByLabel(String publisherLabel) {
+		for ( Publisher publisher : publishers ) {
+			if ( publisher.label().equals(publisherLabel ) ) return publisher;
+		}
+		return null;
+	}
+	
+	ContentType[] createContentTypes() {
+		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
+		int count = 0;
+		for (IConfigurationElement ce : ces) {
+			if ( "content_type".equals(ce.getName() ) ) count++;			
+		}
+		
+		ContentType[] result = new ContentType[count];
+		int i=0;
+		for (IConfigurationElement ce : ces) {
+			if ( "content_type".equals(ce.getName() ) ) {
+				result[i++] = new ContentTypeImpl( ce );
+			}
+		}
+		
+		return result;
+	}
+
+	Discoverer[] createDiscoverers() {
+		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
+		int count = 0;
+		for (IConfigurationElement ce : ces) {
+			if ( "discoverer".equals(ce.getName() ) ) count++;			
+		}
+		
+		Discoverer[] result = new Discoverer[count];
+		int i=0;
+		for (IConfigurationElement ce : ces) {
+			if ( "discoverer".equals(ce.getName() ) ) {
+				result[i++] = new DiscovererImpl( ce );
+			}
+		}
+		
+		return result;
+	}
+		
+	Format[] createFormats() {
+		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
+		int count = 0;
+		for (IConfigurationElement ce : ces) {
+			if ( "format".equals(ce.getName() ) ) count++;			
+		}
+		
+		Format[] result = new Format[count];
+		int i=0;
+		for (IConfigurationElement ce : ces) {
+			if ( "format".equals(ce.getName() ) ) {
+				result[i++] = new FormatImpl( ce );
+			}
+		}
+		
+		return result;
+	}
+	
+	Exporter[] createExporters() {
+		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
+		int count = 0;
+		for (IConfigurationElement ce : ces) {
+			if ( "exporter".equals(ce.getName() ) ) count++;			
+		}
+		
+		Exporter[] result = new Exporter[count];
+		int i=0;
+		for (IConfigurationElement ce : ces) {
+			if ( "exporter".equals(ce.getName() ) ) {
+				result[i++] = new ExporterImpl( ce );
+			}
+		}
+		
+		return result;
+	}
+	
+	Importer[] createImporters() {
+		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
+		int count = 0;
+		for (IConfigurationElement ce : ces) {
+			if ( "importer".equals(ce.getName() ) ) count++;			
+		}
+		
+		Importer[] result = new Importer[count];
+		int i=0;
+		for (IConfigurationElement ce : ces) {
+			if ( "importer".equals(ce.getName() ) ) {
+				result[i++] = new ImporterImpl( ce );
+			}
+		}
+		
+		return result;
+	}
+	
+	Publisher[] createPublishers() {
+		IConfigurationElement ces[] = Platform.getExtensionRegistry().getConfigurationElementsFor( EP ); 
+		int count = 0;
+		for (IConfigurationElement ce : ces) {
+			if ( "publisher".equals(ce.getName() ) ) count++;			
+		}
+		
+		Publisher[] result = new Publisher[count];
+		int i=0;
+		for (IConfigurationElement ce : ces) {
+			if ( "publisher".equals(ce.getName() ) ) {
+				result[i++] = new PublisherImpl( ce );
+			}
+		}
+		
+		Arrays.sort(result, new ToStringComparator.ByLength());
+		
+		return result;
+	}
+	
+	static class ContentTypeImpl implements ContentType {
+		IConfigurationElement ce;
+		ContentTypeAction action;
+		WeakReference<IconResolver> resolverCache = null;
+		boolean invalidIconResolver = false;
+
+		public ContentTypeImpl(IConfigurationElement ce) {
+			this.ce = ce;
+		}
+		
+		ContentTypeAction getOrCreate() throws ExportException {
+			if ( action == null ) {
+				try {
+					String value = ce.getAttribute("contentTypeAction");
+					if ( value == null ) return new DefaultContentTypeAction();
+					action = (ContentTypeAction) ce.createExecutableExtension("contentTypeAction");
+				} catch (CoreException e) {
+					throw new ExportException( e );
+				} 
+			}
+			return action;
+		}		
+
+		@Override
+		public String id() {			
+			return ce.getAttribute("id");
+		}
+
+		@Override
+		public String label() {
+			return ce.getAttribute("label");
+		}
+
+		@Override
+		public String plural() {
+			return ce.getAttribute("plural");
+		}
+
+		public ImageDescriptor icon(String contentUri) {
+			if (!invalidIconResolver && ce.getAttribute("iconResolver") != null) {
+				try {
+					IconResolver resolver = resolverCache != null ? resolverCache.get() : null;
+					if (resolver == null) {
+						resolver = (IconResolver) ce.createExecutableExtension("iconResolver");
+						resolverCache = new WeakReference<IconResolver>(resolver);
+					}
+					return resolver.get(contentUri);
+				} catch (CoreException e) {
+					// Invalid iconResolver, could not instantiate.
+					// Don't try to resolve it anymore if it fails once.
+					invalidIconResolver = true;
+					return null;
+				}
+			}
+			return icon();
+		}
+		
+		@Override
+		public ImageDescriptor icon() {
+			try {
+				String _url = ce.getAttribute("icon");
+				URL url = new URL(_url);
+				return ImageDescriptor.createFromURL(url);
+			} catch (MalformedURLException e) {
+				return null;
+			}
+		}
+
+		@Override
+		public boolean isModel() {
+			return "true".equalsIgnoreCase(ce.getAttribute("model"));
+		}
+		
+		@Override
+		public String toString() {
+			return "ContentType, id="+id()+", label="+label();
+		}
+
+		@Override
+		public Map<String, String> getLabels(ExportContext ctx, Collection<String> contents) throws ExportException {
+			ContentTypeAction action = getOrCreate();
+			return action.getLabels(ctx, contents);
+		}
+		
+	}
+	
+	static class DiscovererImpl implements Discoverer {
+		IConfigurationElement ce;
+		DiscoverAction action;
+
+		public DiscovererImpl(IConfigurationElement ce) {
+			this.ce = ce;
+		}
+
+		@Override
+		public String contentTypeId() {
+			return ce.getAttribute("content_type_id");
+		}
+		
+		DiscoverAction getOrCreate() throws ExportException {
+			if ( action == null ) {
+				try {
+					action = (DiscoverAction) ce.createExecutableExtension("discoverAction");
+				} catch (CoreException e) {
+					throw new ExportException( e );
+				} 
+			}
+			return action;
+		}
+
+//		public Read<Collection<String>> discoverRequest(
+//				Collection<String> startLocations) throws ExportException {
+//			return getOrCreate().discoverRequest(startLocations);
+//		}
+		
+		@Override
+		public String toString() {
+			try {
+				return "Discoverer, contentTypeId="+contentTypeId()+", class="+getOrCreate().getClass().getCanonicalName();
+			} catch (ExportException e) {
+				return "Discoverer, contentTypeId="+contentTypeId();
+			}
+		}
+
+		@Override
+		public Collection<String> discoverContent(ExportContext ctx, Collection<String> startLocations) throws ExportException {
+			return getOrCreate().discoverContent(ctx, startLocations);
+		}
+		
+	}
+
+	static class ExporterImpl implements Exporter {
+		IConfigurationElement ce;
+		ExportClass action;
+		int priority = 0;
+
+		public ExporterImpl(IConfigurationElement ce) {
+			this.ce = ce;
+			String priorityStr = ce.getAttribute("exportPriority");
+			if ( priorityStr!=null ) priority = Integer.valueOf(priorityStr);
+		}
+
+		ExportClass getOrCreate() throws ExportException {
+			if ( action == null ) {
+				try {
+					action = (ExportClass) ce.createExecutableExtension("exportAction");
+				} catch (CoreException e) {
+					throw new ExportException( e );
+				} 
+			}
+			return action;
+		}
+		
+		@Override
+		public String formatId() {			
+			return ce.getAttribute("formatId");
+		}
+		
+		@Override
+		public String contentTypeId() {
+			return ce.getAttribute("content_type_id");
+		}
+
+		@Override
+		public ExportClass exportAction() throws ExportException {
+			return getOrCreate();
+		}
+		
+		@Override
+		public String toString() {
+			try {
+				return "Exporter, formatId="+formatId()+", contentTypeId="+contentTypeId()+", class="+getOrCreate().getClass().getCanonicalName();
+			} catch (ExportException e) {
+				return "Exporter, formatId="+formatId()+", contentTypeId="+contentTypeId();
+			}
+		}
+
+		@Override
+		public int getExportPriority() {
+			return priority;
+		}
+		
+	}
+
+	static class ImporterImpl implements Importer {
+		IConfigurationElement ce;
+
+		public ImporterImpl(IConfigurationElement ce) {
+			this.ce = ce;
+		}
+
+		@Override
+		public String formatId() {			
+			return ce.getAttribute("formatId");
+		}
+		
+		@Override
+		public String contentTypeId() {
+			return ce.getAttribute("content_type_id");
+		}
+
+		@Override
+		public ImportAction importAction() throws ExportException {
+			try {
+				return (ImportAction) ce.createExecutableExtension("exportAction");
+			} catch (CoreException e) {
+				throw new ExportException(e);
+			}
+		}
+		
+		@Override
+		public String toString() {
+			return "Importer, formatId="+formatId()+", contentTypeId="+contentTypeId();
+		}
+		
+	}
+	
+	
+	static class FormatImpl implements Format {
+		IConfigurationElement ce;
+		FormatClass formatClass;
+
+		public FormatImpl(IConfigurationElement ce) {
+			this.ce = ce;
+		}
+		
+		FormatClass getOrCreateFormatClass() throws ExportException {
+			if ( formatClass == null ) {
+				try {
+					formatClass = (FormatClass) ce.createExecutableExtension("formatClass");
+				} catch (CoreException e) {
+					e.printStackTrace();				
+					throw new ExportException( e );
+				} 
+			}
+			return formatClass;
+		}
+
+		@Override
+		public String id() {			
+			return ce.getAttribute("id");
+		}
+
+		@Override
+		public String label() {
+			return ce.getAttribute("label");
+		}
+
+		@Override
+		public String plural() {
+			return ce.getAttribute("plural");
+		}
+
+		@Override
+		public ImageDescriptor icon() {
+			try {
+				String _url = ce.getAttribute("icon");
+				URL url = new URL(_url);
+				return ImageDescriptor.createFromURL(url);
+			} catch (MalformedURLException e) {
+				return null;
+			}
+		}
+
+		@Override
+		public String fileext() {
+			return ce.getAttribute("fileext");		
+		}
+
+		@Override
+		public Class<?> writerClass() throws ClassNotFoundException {
+			String className = ce.getAttribute("writerClass");
+			return Class.forName(className);
+		}
+
+		@Override
+		public Class<?> readerClass() throws ClassNotFoundException {
+			String className = ce.getAttribute("readerClass");
+			return Class.forName(className);
+		}
+
+		@Override
+		public boolean isGroupFormat() {			
+			return "true".equals(ce.getAttribute("isGroupFormat"));
+		}
+		
+		@Override
+		public boolean isContainerFormat() {
+			return "true".equals(ce.getAttribute("isContainerFormat"));
+		}
+		
+		@Override
+		public boolean isAttachable() {
+			return "true".equals(ce.getAttribute("isAttachable"));
+		}		
+
+		@Override
+		public boolean mergeGroupFormatDefault() {
+			return "true".equals(ce.getAttribute("mergeGroupDefault"));		
+		}
+
+		@Override
+		public boolean isAlwaysPublished() {
+			return "true".equals(ce.getAttribute("isAlwaysPublished"));
+		}
+
+		@Override
+		public boolean isLinkContainer() {
+			return "true".equals(ce.getAttribute("isLinkContainer"));
+		}	
+		@Override
+		public RecordType options( ExportContext context ) throws ExportException {
+			return getOrCreateFormatClass().options(context);
+		}
+
+		@Override
+		public List<String> validate(ExportContext context, Variant options) throws ExportException {
+			return getOrCreateFormatClass().validate(context, options);
+		}
+		
+		@Override
+		public void fillDefaultPrefs( ExportContext ctx, Variant options ) throws ExportException {
+			getOrCreateFormatClass().fillDefaultPrefs( ctx, options );
+		}
+
+
+		@Override
+		public String toString() {			
+			try {
+				return "Format, id="+id()+", fileext="+fileext()+", label="+label()+", class="+getOrCreateFormatClass().getClass().getCanonicalName();
+			} catch (ExportException e) {
+				return "Format, id="+id()+", fileext="+fileext()+", label="+label();
+			}			
+		}
+
+		@Override
+		public Object createFile(ExportContext context, File outputFile, Variant options) throws ExportException {
+			return getOrCreateFormatClass().createFile(context, outputFile, options);
+		}
+
+		@Override
+		public Object openFile(ExportContext context, File inputFile, Variant options) throws ExportException {
+			return getOrCreateFormatClass().openFile(context, inputFile, options);
+		}
+		
+		@Override
+		public void closeFile(ExportContext context, Object handle) throws ExportException {
+			getOrCreateFormatClass().closeFile(context, handle);
+		}
+
+		@Override
+		public void addAttachment(ExportContext context, Object handle, List<Content> attachments) throws ExportException {
+			getOrCreateFormatClass().addAttachment(context, handle, attachments);
+		}
+		
+		@Override
+		public FormatClass formatActions() throws ExportException {
+			return getOrCreateFormatClass();
+		}
+
+		@Override
+		public void savePref(Variant options, Preferences contentScopeNode, Preferences workbenchScopeNode) throws ExportException {
+			getOrCreateFormatClass().savePref(options, contentScopeNode, workbenchScopeNode);
+		}
+
+		@Override
+		public void loadPref(Variant options, Preferences contentScopeNode, Preferences workbenchScopeNode) throws ExportException {
+			getOrCreateFormatClass().loadPref(options, contentScopeNode, workbenchScopeNode);			
+		}
+
+	}
+	
+	public static class PublisherImpl implements Publisher {
+
+		IConfigurationElement ce;
+		PublisherClass publisherClass;
+
+		public PublisherImpl(IConfigurationElement ce) {
+			this.ce = ce;
+		}
+		
+		PublisherClass getOrCreatePublisherClass() throws ExportException {
+			if ( publisherClass == null ) {
+				try {
+					publisherClass = (PublisherClass) ce.createExecutableExtension("publisherClass");
+				} catch (CoreException e) {
+					e.printStackTrace();				
+					throw new ExportException( e );
+				} 
+			}
+			return publisherClass;
+		}
+		
+		@Override
+		public String id() {
+			return ce.getAttribute("id");
+		}
+
+		@Override
+		public String label() {
+			return ce.getAttribute("label");
+		}
+
+		@Override
+		public org.simantics.export.core.intf.PublisherClass publisherClass() throws ExportException {
+			return getOrCreatePublisherClass();
+		}
+		
+		@Override
+		public String toString() {
+			return label();
+		}
+		
+	}
+
+	@Override
+	public ContentType[] contentTypes() {
+		return contentTypes;
+	}
+
+	@Override
+	public Discoverer[] discoverers() {
+		return discoverers;
+	}
+
+	@Override
+	public Format[] formats() {
+		return formats;
+	}
+
+	@Override
+	public Importer[] importers() {
+		return importers;
+	}
+
+	@Override
+	public Exporter[] exporters() {
+		return exporters;
+	}
+	
+	public Publisher[] publishers() {
+		return publishers;
+	};
+	
+	Comparator<Exporter> exporterPrioritySorter = new Comparator<Exporter>() {
+		@Override
+		public int compare(Exporter o1, Exporter o2) {			
+			return Integer.signum( o2.getExportPriority() - o1.getExportPriority() );
+		}
+	};
+
+	
+}