taskpropertiespropertysource.java

一个java写的business process management系统

/*
 * Copyright (c) 2003-2004, Alexander Greif
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Flow4J-Eclipse project nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.orthanc.flow4j.designer.model.propertysources;

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

import net.orthanc.flow4j.designer.core.Flow4JPlugin;
import net.orthanc.flow4j.designer.model.JavaTaskFlowletModelPart;
import net.orthanc.flow4j.runtime.ITaskFlowlet;
import net.orthanc.flow4j.runtime.descriptors.TaskPropertyDescriptor;
import net.orthanc.flow4j.runtime.descriptors.TaskPropertyDescriptors;

import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource;
import org.eclipse.ui.views.properties.PropertyDescriptor;

/**
 * Class TaskPropertiesPropertySource TODO
 * @author agreif
 * 
 */
public class TaskPropertiesPropertySource implements IPropertySource {

	private static final String PROP_TASK_PROPERTY_PREFIX = "task_property_"; //$NON-NLS-1$

	private JavaTaskFlowletModelPart taskFlowlet;

	/**
	 * Constructor
	 * @param taskFlowlet
	 */
	public TaskPropertiesPropertySource(JavaTaskFlowletModelPart taskFlowlet) {
		this.taskFlowlet = taskFlowlet;
	}

	/**
	 * @see org.eclipse.ui.views.properties.IPropertySource#getEditableValue()
	 */
	public Object getEditableValue() {
		return this;
	}

	/**
	 * Returns the descriptors for the task's properties.
	 * @see org.eclipse.ui.views.properties.IPropertySource#getPropertyDescriptors()
	 */
	public IPropertyDescriptor[] getPropertyDescriptors() {
		List tempPropDescs = new ArrayList();
		try {
			ITaskFlowlet taskFlowletInstance =
				taskFlowlet.getTaskFlowletInstance();
			TaskPropertyDescriptors propertyDescriptors =
				taskFlowletInstance.getPropertyDescriptors();
			if (propertyDescriptors != null) {
				for (Iterator iter = propertyDescriptors.iterator();
					iter.hasNext();
					) {
					TaskPropertyDescriptor desc =
						(TaskPropertyDescriptor) iter.next();
					PropertyDescriptor propDesc =
						new PropertyDescriptor(
							PROP_TASK_PROPERTY_PREFIX + desc.getName(),
							desc.getName());
					tempPropDescs.add(propDesc);
				}
			}
		} catch (ClassNotFoundException e) {
		} catch (Throwable e) {
			Flow4JPlugin.log(e);
		}

		return (
			IPropertyDescriptor[]) tempPropDescs
				.toArray(new IPropertyDescriptor[] {
		});
	}

	/**
	 * Returns the TaskPropertyDescriptor which has the given name
	 * @param propName name of the propert
	 * @return the TaskFlowletPropertydescriptor which has the given name
	 * @throws ClassNotFoundException if the task flowlet could not be found.
	 */
	private TaskPropertyDescriptor getTaskFlowletPropertyDescriptor(String propName)
		throws ClassNotFoundException, Throwable {
		ITaskFlowlet taskFlowletInstance = taskFlowlet.getTaskFlowletInstance();
		TaskPropertyDescriptors propertyDescriptors =
			taskFlowletInstance.getPropertyDescriptors();
		if (propertyDescriptors != null) {
			for (Iterator iter = propertyDescriptors.iterator();
				iter.hasNext();
				) {
				TaskPropertyDescriptor propDesc =
					(TaskPropertyDescriptor) iter.next();
				if (propName.equals(propDesc.getName()))
					return propDesc;
			}
		}
		return null;
	}

	/**
	 * Returns the PropertySource object for the tasks property.
	 * @see org.eclipse.ui.views.properties.IPropertySource#getPropertyValue(java.lang.Object)
	 */
	public Object getPropertyValue(Object id) {
		try {
			String propName =
				((String) id).substring(PROP_TASK_PROPERTY_PREFIX.length());
			TaskPropertyDescriptor propDesc =
				getTaskFlowletPropertyDescriptor(propName);
			if (propDesc != null)
				return new TaskPropertyPropertySource(taskFlowlet, propDesc);
		} catch (ClassNotFoundException e) {
		} catch (Throwable e) {
			Flow4JPlugin.log(e);
		}
		return "N/A";
	}

	/**
	 * @see org.eclipse.ui.views.properties.IPropertySource#isPropertySet(java.lang.Object)
	 */
	public boolean isPropertySet(Object id) {
		return true;
	}

	/**
	 * @see org.eclipse.ui.views.properties.IPropertySource#resetPropertyValue(java.lang.Object)
	 */
	public void resetPropertyValue(Object id) {

	}

	/**
	 * @see org.eclipse.ui.views.properties.IPropertySource#setPropertyValue(java.lang.Object, java.lang.Object)
	 */
	public void setPropertyValue(Object id, Object value) {
	}

	/**
	 * The property's value. Lists the TaskFlowlet's property names.
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		StringBuffer buf = new StringBuffer(); //$NON-NLS-1$
		try {
			ITaskFlowlet taskFlowletInstance =
				taskFlowlet.getTaskFlowletInstance();
			TaskPropertyDescriptors propertyDescriptors =
				taskFlowletInstance.getPropertyDescriptors();
			if (propertyDescriptors == null)
				buf.append("none"); //$NON-NLS-1$
			else {
				buf.append("["); //$NON-NLS-1$
				for (Iterator iter = propertyDescriptors.iterator();
					iter.hasNext();
					) {
					TaskPropertyDescriptor propDesc =
						(TaskPropertyDescriptor) iter.next();
					buf.append(propDesc.getName());
					if (iter.hasNext())
						buf.append(", "); //$NON-NLS-1$
				}
				buf.append("]"); //$NON-NLS-1$
			}
		} catch (ClassNotFoundException e) {
		} catch (Throwable e) {
			Flow4JPlugin.log(e);
		}

		return buf.toString();
	}

}