taverna-file-impl/src/main/java/org/apache/taverna/workbench/file/impl/actions/OpenNestedWorkflowAction.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.file.impl.actions;

import java.awt.Component;
import java.io.File;

import org.apache.taverna.workbench.file.FileManager;
import org.apache.taverna.workbench.file.FileType;
import org.apache.taverna.workbench.file.exceptions.OpenException;

import org.apache.log4j.Logger;

import org.apache.taverna.scufl2.api.container.WorkflowBundle;

/**
 * An action for opening a nested workflow from a file.
 * 
 * @author Alex Nenadic
 */
public class OpenNestedWorkflowAction extends OpenWorkflowAction {
	private static final long serialVersionUID = -5398423684000142379L;
	private static Logger logger = Logger
			.getLogger(OpenNestedWorkflowAction.class);

	public OpenNestedWorkflowAction(FileManager fileManager) {
		super(fileManager);
	}

	/**
	 * Opens a nested workflow from a file (should be one file even though the
	 * method takes a list of files - this is because it overrides the
	 * {@link OpenWorkflowAction#openWorkflows(Component, File[], FileType, OpenCallback)
	 * openWorkflows(...)} method).
	 */
	@Override
	public void openWorkflows(final Component parentComponent, File[] files,
			FileType fileType, OpenCallback openCallback) {
		ErrorLoggingOpenCallbackWrapper callback = new ErrorLoggingOpenCallbackWrapper(
				openCallback);
		for (File file : files)
			try {
				callback.aboutToOpenDataflow(file);
				WorkflowBundle workflowBundle = fileManager.openDataflow(
						fileType, file);
				callback.openedDataflow(file, workflowBundle);
			} catch (final RuntimeException ex) {
				logger.warn("Could not open workflow from " + file, ex);
				if (!callback.couldNotOpenDataflow(file, ex))
					showErrorMessage(parentComponent, file, ex);
			} catch (final OpenException ex) {
				logger.warn("Could not open workflow from " + file, ex);
				if (!callback.couldNotOpenDataflow(file, ex))
					showErrorMessage(parentComponent, file, ex);
				return;
			}
	}
}