TaskDescriptorInitializer.java

package cz.cuni.mff.d3s.been.web.model;

import java.net.UnknownHostException;
import java.util.List;

import cz.cuni.mff.d3s.been.core.task.*;

/**
 * This class is used to initialize TaskDescriptor from bpk. The right meaning
 * of term 'initialization' is to replace null values in given task descriptor
 * by empty structures. The main purpose of this pseudo-initialization is to
 * prepare task descriptor for using in Tapestry forms.
 */
public class TaskDescriptorInitializer {

	/**
	 * If debug port is not specified in given task descriptor, this value will be
	 * used as default value.
	 */
	public static final int DEFAULT_DEBUG_PORT = 9000;

	/**
	 * If debug mode is not specified in given task descriptor, this value will be
	 * used as default value.
	 */
	public static final ModeEnum DEFAULT_DEBUG_MODE = ModeEnum.NONE;

	/**
	 * If task exclusivity is not specified in given task descriptor, this value
	 * will be used as default value.
	 */
	public static final TaskExclusivity DEFAULT_TASK_EXCLUSIVITY = TaskExclusivity.NON_EXCLUSIVE;

	/**
	 * Initialize given task descriptor. String list of arguments and String list
	 * of java opts are transformed to Lists of key value pair.
	 * 
	 * @param taskDescriptor
	 *          task descriptor which will be initialized
	 * @param args
	 *          list of key value pairs to which all args from task descriptor
	 *          will be inserted
	 * @param javaOpts
	 *          list of key value pairs to which all java opts from task
	 *          descriptor will be inserted
	 */
	public static void initialize(TaskDescriptor taskDescriptor, List<KeyValuePair> args, List<KeyValuePair> javaOpts) {
		if (!taskDescriptor.isSetArguments()) {
			taskDescriptor.setArguments(new ObjectFactory().createArguments());
		}

		if (!taskDescriptor.isSetProperties()) {
			taskDescriptor.setProperties(new ObjectFactory().createTaskProperties());
		}

		if (!taskDescriptor.isSetJava()) {
			taskDescriptor.setJava(new ObjectFactory().createJava());
		}

		if (!taskDescriptor.getJava().isSetJavaOptions()) {
			taskDescriptor.getJava().setJavaOptions(new ObjectFactory().createJavaOptions());
		}

		if (!taskDescriptor.isSetExclusive()) {
			taskDescriptor.setExclusive(DEFAULT_TASK_EXCLUSIVITY);
		}

		if (!taskDescriptor.isSetFailurePolicy()) {
			taskDescriptor.setFailurePolicy(new ObjectFactory().createFailurePolicy());
		}

		if (!taskDescriptor.isSetDebug()) {
			taskDescriptor.setDebug(new ObjectFactory().createDebug());
			taskDescriptor.getDebug().setMode(DEFAULT_DEBUG_MODE);

			try {
				taskDescriptor.getDebug().setHost(java.net.InetAddress.getLocalHost().getHostAddress());
			} catch (UnknownHostException e) {
				// this is only default initialization, we can simply ignore this exception
			}
			// we can set the port because mode is DEBUG by default
			taskDescriptor.getDebug().setPort(DEFAULT_DEBUG_PORT);

		}

		if (!taskDescriptor.isSetHostRuntimes()) {
			taskDescriptor.setHostRuntimes(new HostRuntimes());
		}

		// insert all args and java opts to given lists of key value pais
		for (int i = 0; i < taskDescriptor.getArguments().getArgument().size(); i++) {
			args.add(new KeyValuePair(i, taskDescriptor.getArguments().getArgument().get(i)));
		}

		for (int i = 0; i < taskDescriptor.getJava().getJavaOptions().getJavaOption().size(); i++) {
			javaOpts.add(new KeyValuePair(i, taskDescriptor.getJava().getJavaOptions().getJavaOption().get(i)));
		}
	}

}