plugins/cdo/bundles/org.eclipse.papyrus.cdo.ui/src/org/eclipse/papyrus/cdo/internal/ui/views/ItemProviderFilterRegistry.java - papyrus/org.eclipse.papyrus-collaborativemodeling - Git at Google

 /*****************************************************************************
  * Copyright (c) 2013, 2017 CEA LIST.
  *
  * 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:
  *   CEA LIST - Initial API and implementation
  *   Christian W. Damus (CEA) - bug 443830
  *
  *****************************************************************************/
 package org.eclipse.papyrus.cdo.internal.ui.views;

 import java.util.Iterator;
 import java.util.Map;
 import java.util.regex.Pattern;

 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.emf.ecore.plugin.RegistryReader;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.net4j.util.ui.views.IElementFilter;
 import org.eclipse.papyrus.cdo.internal.core.CDOUtils;
 import org.eclipse.papyrus.cdo.internal.ui.Activator;
 import org.osgi.framework.Bundle;

 import com.google.common.base.Predicate;
 import com.google.common.base.Supplier;
 import com.google.common.base.Suppliers;
 import com.google.common.collect.Maps;


 /**
  * This is the ItemProviderFilterRegistry type. Enjoy.
  */
 class ItemProviderFilterRegistry {

 	static final ItemProviderFilterRegistry INSTANCE = new ItemProviderFilterRegistry();

 	private final Map<String, Filter> filters = Maps.newHashMap();

 	private ItemProviderFilterRegistry() {
 		super();

 		new MyRegistryReader().readRegistry();
 	}

 	public Predicate<Object> createFilter(ILabelProvider labelProvider) {
 		return new CompositeFilter(labelProvider);
 	}

 	//
 	// Nested types
 	//

 	final class CompositeFilter implements Predicate<Object> {

 		private final ILabelProvider labelProvider;

 		private final LabelWrapper labelWrapper = new LabelWrapper();

 		CompositeFilter(ILabelProvider labelProvider) {
 			super();

 			this.labelProvider = labelProvider;
 		}

 		@Override
 		public boolean apply(Object input) {
 			boolean result = true;

 			if (!filters.isEmpty()) {
 				labelWrapper.object = input;
 				labelWrapper.label = labelProvider.getText(input);

 				for (Iterator<Filter> iter = filters.values().iterator(); result && iter.hasNext();) {
 					result = !iter.next().apply(labelWrapper);
 				}
 			}

 			return result;
 		}
 	}

 	static final class LabelWrapper {

 		Object object;

 		String label;

 		LabelWrapper() {
 			super();
 		}
 	}

 	static abstract class Filter implements Predicate<LabelWrapper> {

 		final String id;

 		Filter(String id) {
 			super();

 			this.id = id;
 		}

 		String getID() {
 			return id;
 		}
 	}

 	static class LabelPatternFilter extends Filter {

 		private final Pattern pattern;

 		LabelPatternFilter(String id, String pattern) {
 			super(id);

 			this.pattern = Pattern.compile(pattern);
 		}

 		@Override
 		public boolean apply(LabelWrapper input) {
 			return (input.label != null) && pattern.matcher(input.label).find();
 		}

 	}

 	static class LabelPatternFilterWithObjectClass extends LabelPatternFilter {

 		private final Class<?> objectClass;

 		private final boolean adapt;

 		LabelPatternFilterWithObjectClass(String id, String pattern, Class<?> objectClass, boolean adapt) {
 			super(id, pattern);

 			this.objectClass = objectClass;
 			this.adapt = adapt;
 		}

 		@Override
 		public boolean apply(LabelWrapper input) {
 			return adapts(input.object) && super.apply(input);
 		}

 		private boolean adapts(Object object) {
 			return adapt ? (CDOUtils.adapt(object, objectClass) != null) : objectClass.isInstance(object);
 		}
 	}

 	static class ElementFilterFilter extends Filter {

 		private final Supplier<? extends IElementFilter> filter;

 		private boolean enabled = true;

 		ElementFilterFilter(String id, Supplier<? extends IElementFilter> filter) {
 			super(id);

 			this.filter = filter;
 		}

 		@Override
 		public boolean apply(LabelWrapper input) {
 			try {
 				return enabled && filter.get().filter(input.object);
 			} catch (Exception e) {
 				Activator.log.error("Uncaught exception in element filter. Filter will be disabled.", e); //$NON-NLS-1$
 				enabled = false;
 				return false;
 			}
 		}
 	}

 	static class PredicateFilter extends Filter {

 		private final Supplier<? extends Predicate<Object>> predicate;

 		private boolean enabled = true;

 		PredicateFilter(String id, Supplier<? extends Predicate<Object>> predicate) {
 			super(id);

 			this.predicate = predicate;
 		}

 		@Override
 		public boolean apply(LabelWrapper input) {
 			try {
 				return enabled && predicate.get().apply(input.object);
 			} catch (Exception e) {
 				Activator.log.error("Uncaught exception in predicate. Filter will be disabled.", e); //$NON-NLS-1$
 				enabled = false;
 				return false;
 			}
 		}
 	}

 	class MyRegistryReader extends RegistryReader {

 		static final String EXT_PT = "repositoryFilters"; //$NON-NLS-1$

 		static final String E_ITEM_PROVIDER_FILTER = "itemProviderFilter"; //$NON-NLS-1$

 		static final String A_ID = "id"; //$NON-NLS-1$

 		static final String E_LABEL_PATTERN = "labelPattern"; //$NON-NLS-1$

 		static final String A_PATTERN = "pattern"; //$NON-NLS-1$

 		static final String A_OBJECT_CLASS = "objectClass"; //$NON-NLS-1$

 		static final String A_ADAPT = "adapt"; //$NON-NLS-1$

 		static final String E_ELEMENT_FILTER = "elementFilter"; //$NON-NLS-1$

 		static final String A_CLASS = "class"; //$NON-NLS-1$

 		static final String A_SUPPLIER_CLASS = "supplierClass"; //$NON-NLS-1$

 		static final String E_PREDICATE = "predicate"; //$NON-NLS-1$

 		private String currentID;

 		private IConfigurationElement currentConfig;

 		MyRegistryReader() {
 			super(Platform.getExtensionRegistry(), Activator.PLUGIN_ID, EXT_PT);
 		}

 		@Override
 		protected boolean readElement(IConfigurationElement config, boolean add) {
 			boolean result = true;

 			final String name = config.getName();

 			if (E_ITEM_PROVIDER_FILTER.equals(name)) {
 				String id = config.getAttribute(A_ID);
 				if (id == null) {
 					result = false;
 					logMissingAttribute(config, A_ID);
 					currentID = null;
 					currentConfig = null;
 				} else {
 					if (add) {
 						if (currentID != null) {
 							// haven't created the previous filter
 							logError(currentConfig, String.format("Missing specification of filter %s.", currentID)); //$NON-NLS-1$
 						}

 						currentID = id;
 						currentConfig = config;
 					} else if (id != null) {
 						removeFilter(id);
 					}
 				}
 			} else if (add) { // don't need to process deletion of filter specifications, only filters
 				if (currentID == null) {
 					result = false;
 					logError(config, String.format("Too many filter specifications.")); //$NON-NLS-1$
 				} else if (filters.containsKey(currentID)) {
 					result = false;
 					logError(config, String.format("Duplicate filter ID \"%s\".  The duplicate is ignored.", currentID)); //$NON-NLS-1$
 				} else {
 					result = createFilter(config);
 				}
 			}

 			return result;
 		}

 		void removeFilter(String id) {
 			filters.remove(id);
 		}

 		boolean createFilter(IConfigurationElement config) {
 			boolean result = false;

 			final String name = config.getName();

 			if (E_LABEL_PATTERN.equals(name)) {
 				result = createLabelPatternFilter(config);
 			} else if (E_ELEMENT_FILTER.equals(name)) {
 				result = createElementFilterFilter(config);
 			} else if (E_PREDICATE.equals(name)) {
 				result = createPredicateFilter(config);
 			}

 			return result;
 		}

 		private void addFilter(Filter filter) {
 			filters.put(currentID, filter);
 			currentID = null;
 			currentConfig = null;
 		}

 		boolean createLabelPatternFilter(IConfigurationElement config) {
 			boolean result = true;

 			String pattern = config.getAttribute(A_PATTERN);
 			if (pattern == null) {
 				logMissingAttribute(config, A_PATTERN);
 				result = false;
 			} else {
 				Class<?> objectClass = null;
 				String className = config.getAttribute(A_OBJECT_CLASS);

 				if (className != null) {
 					String bundleID = config.getContributor().getName();

 					try {
 						Bundle bundle = Platform.getBundle(bundleID);
 						objectClass = bundle.loadClass(className);
 					} catch (Exception e) {
 						result = false;
 						logError(config, String.format("Could not find class \"%s\" in bundle \"%s\".", className, bundleID)); //$NON-NLS-1$
 					}
 				}

 				if (result) {
 					try {
 						if (objectClass == null) {
 							addFilter(new LabelPatternFilter(currentID, pattern));
 						} else {
 							boolean adapt = false;
 							String adaptAttr = config.getAttribute(A_ADAPT);
 							if (adaptAttr != null) {
 								adapt = Boolean.parseBoolean(adaptAttr);
 							}

 							addFilter(new LabelPatternFilterWithObjectClass(currentID, pattern, objectClass, adapt));
 						}
 					} catch (Exception e) {
 						result = false;
 						Activator.log.error(e);
 						logError(config, String.format("Failed to initialize filter on pattern \"%s\".", pattern)); //$NON-NLS-1$
 					}
 				}
 			}

 			return result;
 		}

 		boolean createElementFilterFilter(IConfigurationElement config) {
 			boolean result = true;

 			String className = config.getAttribute(A_CLASS);
 			String supplierClassName = config.getAttribute(A_SUPPLIER_CLASS);

 			if ((className == null) && (supplierClassName == null)) {
 				result = false;
 				logMissingAttribute(config, A_CLASS);
 			} else if (className != null) {
 				try {
 					Object extension = config.createExecutableExtension(A_CLASS);
 					if (!(extension instanceof IElementFilter)) {
 						result = false;
 						logError(config, String.format("Extension is not an IElementFilter: %s", extension.getClass().getName())); //$NON-NLS-1$
 					}

 					addFilter(new ElementFilterFilter(currentID, Suppliers.ofInstance((IElementFilter) extension)));
 				} catch (CoreException e) {
 					result = false;
 					Activator.log.error(e);
 				}
 			} else {
 				try {
 					Object extension = config.createExecutableExtension(A_CLASS);
 					if (!(extension instanceof Supplier<?>)) {
 						result = false;
 						logError(config, String.format("Extension is not a Supplier<? extends IElementFilter>: %s", extension.getClass().getName())); //$NON-NLS-1$
 					}

 					@SuppressWarnings("unchecked")
 					Supplier<? extends IElementFilter> supplier = (Supplier<? extends IElementFilter>) extension;
 					addFilter(new ElementFilterFilter(currentID, Suppliers.memoize(supplier)));
 				} catch (CoreException e) {
 					result = false;
 					Activator.log.error(e);
 				}
 			}

 			return result;
 		}

 		boolean createPredicateFilter(IConfigurationElement config) {
 			boolean result = true;

 			String className = config.getAttribute(A_CLASS);
 			String supplierClassName = config.getAttribute(A_SUPPLIER_CLASS);

 			if ((className == null) && (supplierClassName == null)) {
 				result = false;
 				logMissingAttribute(config, A_CLASS);
 			} else if (className != null) {
 				try {
 					Object extension = config.createExecutableExtension(A_CLASS);
 					if (!(extension instanceof Predicate<?>)) {
 						result = false;
 						logError(config, String.format("Extension is not a Predicate<Object>: %s", extension.getClass().getName())); //$NON-NLS-1$
 					}

 					@SuppressWarnings("unchecked")
 					Predicate<Object> predicate = (Predicate<Object>) extension;
 					addFilter(new PredicateFilter(currentID, Suppliers.ofInstance(predicate)));
 				} catch (CoreException e) {
 					result = false;
 					Activator.log.error(e);
 				}
 			} else {
 				try {
 					Object extension = config.createExecutableExtension(A_CLASS);
 					if (!(extension instanceof Supplier<?>)) {
 						result = false;
 						logError(config, String.format("Extension is not a Supplier<? extends Predicate<Object>>: %s", extension.getClass().getName())); //$NON-NLS-1$
 					}

 					@SuppressWarnings("unchecked")
 					Supplier<? extends Predicate<Object>> supplier = (Supplier<? extends Predicate<Object>>) extension;
 					addFilter(new PredicateFilter(currentID, Suppliers.memoize(supplier)));
 				} catch (CoreException e) {
 					result = false;
 					Activator.log.error(e);
 				}
 			}

 			return result;
 		}
 	}
 }
	/*****************************************************************************
	* Copyright (c) 2013, 2017 CEA LIST.
	*
	* 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:
	* CEA LIST - Initial API and implementation
	* Christian W. Damus (CEA) - bug 443830
	*
	*****************************************************************************/
	package org.eclipse.papyrus.cdo.internal.ui.views;

	import java.util.Iterator;
	import java.util.Map;
	import java.util.regex.Pattern;

	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IConfigurationElement;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.emf.ecore.plugin.RegistryReader;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.net4j.util.ui.views.IElementFilter;
	import org.eclipse.papyrus.cdo.internal.core.CDOUtils;
	import org.eclipse.papyrus.cdo.internal.ui.Activator;
	import org.osgi.framework.Bundle;

	import com.google.common.base.Predicate;
	import com.google.common.base.Supplier;
	import com.google.common.base.Suppliers;
	import com.google.common.collect.Maps;


	/**
	* This is the ItemProviderFilterRegistry type. Enjoy.
	*/
	class ItemProviderFilterRegistry {

	static final ItemProviderFilterRegistry INSTANCE = new ItemProviderFilterRegistry();

	private final Map<String, Filter> filters = Maps.newHashMap();

	private ItemProviderFilterRegistry() {
	super();

	new MyRegistryReader().readRegistry();
	}

	public Predicate<Object> createFilter(ILabelProvider labelProvider) {
	return new CompositeFilter(labelProvider);
	}

	//
	// Nested types
	//

	final class CompositeFilter implements Predicate<Object> {

	private final ILabelProvider labelProvider;

	private final LabelWrapper labelWrapper = new LabelWrapper();

	CompositeFilter(ILabelProvider labelProvider) {
	super();

	this.labelProvider = labelProvider;
	}

	@Override
	public boolean apply(Object input) {
	boolean result = true;

	if (!filters.isEmpty()) {
	labelWrapper.object = input;
	labelWrapper.label = labelProvider.getText(input);

	for (Iterator<Filter> iter = filters.values().iterator(); result && iter.hasNext();) {
	result = !iter.next().apply(labelWrapper);
	}
	}

	return result;
	}
	}

	static final class LabelWrapper {

	Object object;

	String label;

	LabelWrapper() {
	super();
	}
	}

	static abstract class Filter implements Predicate<LabelWrapper> {

	final String id;

	Filter(String id) {
	super();

	this.id = id;
	}

	String getID() {
	return id;
	}
	}

	static class LabelPatternFilter extends Filter {

	private final Pattern pattern;

	LabelPatternFilter(String id, String pattern) {
	super(id);

	this.pattern = Pattern.compile(pattern);
	}

	@Override
	public boolean apply(LabelWrapper input) {
	return (input.label != null) && pattern.matcher(input.label).find();
	}

	}

	static class LabelPatternFilterWithObjectClass extends LabelPatternFilter {

	private final Class<?> objectClass;

	private final boolean adapt;

	LabelPatternFilterWithObjectClass(String id, String pattern, Class<?> objectClass, boolean adapt) {
	super(id, pattern);

	this.objectClass = objectClass;
	this.adapt = adapt;
	}

	@Override
	public boolean apply(LabelWrapper input) {
	return adapts(input.object) && super.apply(input);
	}

	private boolean adapts(Object object) {
	return adapt ? (CDOUtils.adapt(object, objectClass) != null) : objectClass.isInstance(object);
	}
	}

	static class ElementFilterFilter extends Filter {

	private final Supplier<? extends IElementFilter> filter;

	private boolean enabled = true;

	ElementFilterFilter(String id, Supplier<? extends IElementFilter> filter) {
	super(id);

	this.filter = filter;
	}

	@Override
	public boolean apply(LabelWrapper input) {
	try {
	return enabled && filter.get().filter(input.object);
	} catch (Exception e) {
	Activator.log.error("Uncaught exception in element filter. Filter will be disabled.", e); //$NON-NLS-1$
	enabled = false;
	return false;
	}
	}
	}

	static class PredicateFilter extends Filter {

	private final Supplier<? extends Predicate<Object>> predicate;

	private boolean enabled = true;

	PredicateFilter(String id, Supplier<? extends Predicate<Object>> predicate) {
	super(id);

	this.predicate = predicate;
	}

	@Override
	public boolean apply(LabelWrapper input) {
	try {
	return enabled && predicate.get().apply(input.object);
	} catch (Exception e) {
	Activator.log.error("Uncaught exception in predicate. Filter will be disabled.", e); //$NON-NLS-1$
	enabled = false;
	return false;
	}
	}
	}

	class MyRegistryReader extends RegistryReader {

	static final String EXT_PT = "repositoryFilters"; //$NON-NLS-1$

	static final String E_ITEM_PROVIDER_FILTER = "itemProviderFilter"; //$NON-NLS-1$

	static final String A_ID = "id"; //$NON-NLS-1$

	static final String E_LABEL_PATTERN = "labelPattern"; //$NON-NLS-1$

	static final String A_PATTERN = "pattern"; //$NON-NLS-1$

	static final String A_OBJECT_CLASS = "objectClass"; //$NON-NLS-1$

	static final String A_ADAPT = "adapt"; //$NON-NLS-1$

	static final String E_ELEMENT_FILTER = "elementFilter"; //$NON-NLS-1$

	static final String A_CLASS = "class"; //$NON-NLS-1$

	static final String A_SUPPLIER_CLASS = "supplierClass"; //$NON-NLS-1$

	static final String E_PREDICATE = "predicate"; //$NON-NLS-1$

	private String currentID;

	private IConfigurationElement currentConfig;

	MyRegistryReader() {
	super(Platform.getExtensionRegistry(), Activator.PLUGIN_ID, EXT_PT);
	}

	@Override
	protected boolean readElement(IConfigurationElement config, boolean add) {
	boolean result = true;

	final String name = config.getName();

	if (E_ITEM_PROVIDER_FILTER.equals(name)) {
	String id = config.getAttribute(A_ID);
	if (id == null) {
	result = false;
	logMissingAttribute(config, A_ID);
	currentID = null;
	currentConfig = null;
	} else {
	if (add) {
	if (currentID != null) {
	// haven't created the previous filter
	logError(currentConfig, String.format("Missing specification of filter %s.", currentID)); //$NON-NLS-1$
	}

	currentID = id;
	currentConfig = config;
	} else if (id != null) {
	removeFilter(id);
	}
	}
	} else if (add) { // don't need to process deletion of filter specifications, only filters
	if (currentID == null) {
	result = false;
	logError(config, String.format("Too many filter specifications.")); //$NON-NLS-1$
	} else if (filters.containsKey(currentID)) {
	result = false;
	logError(config, String.format("Duplicate filter ID \"%s\". The duplicate is ignored.", currentID)); //$NON-NLS-1$
	} else {
	result = createFilter(config);
	}
	}

	return result;
	}

	void removeFilter(String id) {
	filters.remove(id);
	}

	boolean createFilter(IConfigurationElement config) {
	boolean result = false;

	final String name = config.getName();

	if (E_LABEL_PATTERN.equals(name)) {
	result = createLabelPatternFilter(config);
	} else if (E_ELEMENT_FILTER.equals(name)) {
	result = createElementFilterFilter(config);
	} else if (E_PREDICATE.equals(name)) {
	result = createPredicateFilter(config);
	}

	return result;
	}

	private void addFilter(Filter filter) {
	filters.put(currentID, filter);
	currentID = null;
	currentConfig = null;
	}

	boolean createLabelPatternFilter(IConfigurationElement config) {
	boolean result = true;

	String pattern = config.getAttribute(A_PATTERN);
	if (pattern == null) {
	logMissingAttribute(config, A_PATTERN);
	result = false;
	} else {
	Class<?> objectClass = null;
	String className = config.getAttribute(A_OBJECT_CLASS);

	if (className != null) {
	String bundleID = config.getContributor().getName();

	try {
	Bundle bundle = Platform.getBundle(bundleID);
	objectClass = bundle.loadClass(className);
	} catch (Exception e) {
	result = false;
	logError(config, String.format("Could not find class \"%s\" in bundle \"%s\".", className, bundleID)); //$NON-NLS-1$
	}
	}

	if (result) {
	try {
	if (objectClass == null) {
	addFilter(new LabelPatternFilter(currentID, pattern));
	} else {
	boolean adapt = false;
	String adaptAttr = config.getAttribute(A_ADAPT);
	if (adaptAttr != null) {
	adapt = Boolean.parseBoolean(adaptAttr);
	}

	addFilter(new LabelPatternFilterWithObjectClass(currentID, pattern, objectClass, adapt));
	}
	} catch (Exception e) {
	result = false;
	Activator.log.error(e);
	logError(config, String.format("Failed to initialize filter on pattern \"%s\".", pattern)); //$NON-NLS-1$
	}
	}
	}

	return result;
	}

	boolean createElementFilterFilter(IConfigurationElement config) {
	boolean result = true;

	String className = config.getAttribute(A_CLASS);
	String supplierClassName = config.getAttribute(A_SUPPLIER_CLASS);

	if ((className == null) && (supplierClassName == null)) {
	result = false;
	logMissingAttribute(config, A_CLASS);
	} else if (className != null) {
	try {
	Object extension = config.createExecutableExtension(A_CLASS);
	if (!(extension instanceof IElementFilter)) {
	result = false;
	logError(config, String.format("Extension is not an IElementFilter: %s", extension.getClass().getName())); //$NON-NLS-1$
	}

	addFilter(new ElementFilterFilter(currentID, Suppliers.ofInstance((IElementFilter) extension)));
	} catch (CoreException e) {
	result = false;
	Activator.log.error(e);
	}
	} else {
	try {
	Object extension = config.createExecutableExtension(A_CLASS);
	if (!(extension instanceof Supplier<?>)) {
	result = false;
	logError(config, String.format("Extension is not a Supplier<? extends IElementFilter>: %s", extension.getClass().getName())); //$NON-NLS-1$
	}

	@SuppressWarnings("unchecked")
	Supplier<? extends IElementFilter> supplier = (Supplier<? extends IElementFilter>) extension;
	addFilter(new ElementFilterFilter(currentID, Suppliers.memoize(supplier)));
	} catch (CoreException e) {
	result = false;
	Activator.log.error(e);
	}
	}

	return result;
	}

	boolean createPredicateFilter(IConfigurationElement config) {
	boolean result = true;

	String className = config.getAttribute(A_CLASS);
	String supplierClassName = config.getAttribute(A_SUPPLIER_CLASS);

	if ((className == null) && (supplierClassName == null)) {
	result = false;
	logMissingAttribute(config, A_CLASS);
	} else if (className != null) {
	try {
	Object extension = config.createExecutableExtension(A_CLASS);
	if (!(extension instanceof Predicate<?>)) {
	result = false;
	logError(config, String.format("Extension is not a Predicate<Object>: %s", extension.getClass().getName())); //$NON-NLS-1$
	}

	@SuppressWarnings("unchecked")
	Predicate<Object> predicate = (Predicate<Object>) extension;
	addFilter(new PredicateFilter(currentID, Suppliers.ofInstance(predicate)));
	} catch (CoreException e) {
	result = false;
	Activator.log.error(e);
	}
	} else {
	try {
	Object extension = config.createExecutableExtension(A_CLASS);
	if (!(extension instanceof Supplier<?>)) {
	result = false;
	logError(config, String.format("Extension is not a Supplier<? extends Predicate<Object>>: %s", extension.getClass().getName())); //$NON-NLS-1$
	}

	@SuppressWarnings("unchecked")
	Supplier<? extends Predicate<Object>> supplier = (Supplier<? extends Predicate<Object>>) extension;
	addFilter(new PredicateFilter(currentID, Suppliers.memoize(supplier)));
	} catch (CoreException e) {
	result = false;
	Activator.log.error(e);
	}
	}

	return result;
	}
	}
	}