taskioparameterspropertysource.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 net.orthanc.flow4j.designer.core.Flow4JPlugin;
import net.orthanc.flow4j.designer.model.JavaTaskFlowletModelPart;
import net.orthanc.flow4j.runtime.ITaskFlowlet;

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

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

	public static final String PROP_TASK_INPUT_PARAMS = "task_input_parameters"; //$NON-NLS-1$
	public static final String PROP_TASK_OUTPUT_PARAMS = "task_output_parameters"; //$NON-NLS-1$

	private JavaTaskFlowletModelPart taskFlowlet;

	/**
	 * Constructor
	 * @param taskFlowlet
	 */
	public TaskIOParametersPropertySource(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 input and output parameters.
	 * @see org.eclipse.ui.views.properties.IPropertySource#getPropertyDescriptors()
	 */
	public IPropertyDescriptor[] getPropertyDescriptors() {
		IPropertyDescriptor[] paramDescs = new IPropertyDescriptor[2];
		paramDescs[0] =
			new PropertyDescriptor(
				PROP_TASK_INPUT_PARAMS,
				Flow4JPlugin.getResourceString(
					"PropertyDescriptor_TaskFlowlet_Input_Parameters.label"));
		paramDescs[1] =
			new PropertyDescriptor(
				PROP_TASK_OUTPUT_PARAMS,
				Flow4JPlugin.getResourceString(
					"PropertyDescriptor_TaskFlowlet_Output_Parameters.label"));

		return paramDescs;
	}

	/**
	 * @see org.eclipse.ui.views.properties.IPropertySource#getPropertyValue(java.lang.Object)
	 */
	public Object getPropertyValue(Object propName) {
		try {
			ITaskFlowlet taskFlowletInstance =
				taskFlowlet.getTaskFlowletInstance();
			if (PROP_TASK_INPUT_PARAMS.equals(propName)) {
				return new TaskParametersPropertySource("in", taskFlowletInstance.getInputParameterDescriptors());
			} else if (PROP_TASK_OUTPUT_PARAMS.equals(propName)) {
				return new TaskParametersPropertySource("out", taskFlowletInstance.getOutputParameterDescriptors());
			}
		} catch (ClassNotFoundException e) {
			return "N/A";
		} catch (Throwable e) {
			Flow4JPlugin.log(e);
			return "N/A";
		}
		return null;
	}

	/**
	 * @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) {
	}

	/**
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		int inParamsCount;
		int outParamsCount;
		try {
			ITaskFlowlet taskFlowletInstance =
				taskFlowlet.getTaskFlowletInstance();
			inParamsCount =
				taskFlowletInstance.getInputParameterDescriptors() == null
					? 0
					: taskFlowletInstance.getInputParameterDescriptors().size();
			outParamsCount =
				taskFlowletInstance.getOutputParameterDescriptors() == null
					? 0
					: taskFlowletInstance.getOutputParameterDescriptors().size();
		} catch (ClassNotFoundException e) {
			return "N/A";
		} catch (Throwable e) {
			Flow4JPlugin.log(e);
			return "N/A";
		}

		if (inParamsCount == 0 && outParamsCount == 0)
			return "[none]";
		
		StringBuffer buf = new StringBuffer(); //$NON-NLS-1$
		buf.append("[");
		buf.append(new Integer(inParamsCount).toString());
		buf.append(" in, ");
		buf.append(new Integer(outParamsCount).toString());
		buf.append(" out]");

		return buf.toString();
	}
}