taverna-contextual-views-impl/src/main/java/org/apache/taverna/workbench/ui/views/contextualviews/activity/impl/ContextualViewFactoryRegistryImpl.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.taverna.workbench.ui.views.contextualviews.activity.impl;

import java.util.ArrayList;
import java.util.List;

import org.apache.taverna.workbench.ui.views.contextualviews.activity.ContextualViewFactory;
import org.apache.taverna.workbench.ui.views.contextualviews.activity.ContextualViewFactoryRegistry;

/**
 * An SPI registry for discovering ActivityViewFactories for a given object,
 * like an {@link org.apache.taverna.workflowmodel.processor.activity.Activity}.
 * <p>
 * For {@link ContextualViewFactory factories} to be found, its full qualified
 * name needs to be defined as a resource file
 * <code>/META-INF/services/net.sf.taverna.t2.workbench.ui.views.contextualviews.ContextualViewFactory</code>
 *
 * @author Alan R Williams
 * @author Stuart Owen
 * @author Ian Dunlop
 * @author Stian Soiland-Reyes
 * 
 * @see ContextualViewFactory
 */
public class ContextualViewFactoryRegistryImpl implements
		ContextualViewFactoryRegistry {
	private List<ContextualViewFactory<?>> contextualViewFactories;

	/**
	 * Discover and return the ContextualViewFactory associated to the provided
	 * object. This is accomplished by returning the discovered
	 * {@link ContextualViewFactory#canHandle(Object)} that returns true for
	 * that Object.
	 * 
	 * @param object
	 * @return
	 * @see ContextualViewFactory#canHandle(Object)
	 */
	@Override
	public List<ContextualViewFactory<?>> getViewFactoriesForObject(
			Object object) {
		List<ContextualViewFactory<?>> result = new ArrayList<>();
		for (ContextualViewFactory<?> factory : contextualViewFactories)
			if (factory.canHandle(object))
				result.add(factory);
		return result;
	}

	public void setContextualViewFactories(
			List<ContextualViewFactory<?>> contextualViewFactories) {
		this.contextualViewFactories = contextualViewFactories;
	}
}