/**
* The contents of this file are subject to the OpenMRS Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://license.openmrs.org
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* Copyright (C) OpenMRS, LLC. All Rights Reserved.
*/
package org.openmrs.validator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openmrs.scheduler.Task;
import org.openmrs.scheduler.TaskDefinition;
import org.openmrs.util.OpenmrsClassLoader;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;
public class SchedulerFormValidator implements Validator {
/** Log for this class and subclasses */
protected final Log log = LogFactory.getLog(getClass());
/**
* Determines if the command object being submitted is a valid type
*
* @see org.springframework.validation.Validator#supports(java.lang.Class)
*/
@SuppressWarnings("unchecked")
public boolean supports(Class c) {
return c.equals(TaskDefinition.class);
}
/**
* Checks the form object for any inconsistencies/errors
*
* @see org.springframework.validation.Validator#validate(java.lang.Object,
* org.springframework.validation.Errors)
* @should fail validation if name is null or empty or whitespace
* @should fail validation if taskClass is empty or whitespace
* @should fail validation if repeatInterval is null or empty or whitespace
* @should fail validation if class is not instance of Task
* @should fail validation if class is not accessible
* @should fail validation if class cannot be instantiated
* @should fail validation if class not found
* @should pass validation if all required fields have proper values
*/
public void validate(Object obj, Errors errors) {
TaskDefinition taskDefinition = (TaskDefinition) obj;
if (taskDefinition == null) {
errors.rejectValue("task", "error.general");
} else {
//Won't work without name and description properties on Task Definition
ValidationUtils.rejectIfEmptyOrWhitespace(errors, "name", "Scheduler.taskForm.required", new Object[] {
"Task name", taskDefinition.getName() });
ValidationUtils.rejectIfEmptyOrWhitespace(errors, "taskClass", "Scheduler.taskForm.required", new Object[] {
"Task class", taskDefinition.getTaskClass() });
ValidationUtils.rejectIfEmptyOrWhitespace(errors, "repeatInterval", "Scheduler.taskForm.required", new Object[] {
"Repeat interval", taskDefinition.getRepeatInterval() });
// Check if the class is valid
try {
Class<?> taskClass = OpenmrsClassLoader.getInstance().loadClass(taskDefinition.getTaskClass());
Object o = taskClass.newInstance();
if (!(o instanceof Task)) {
errors
.rejectValue("taskClass", "Scheduler.taskForm.classDoesNotImplementTask", new Object[] {
taskDefinition.getTaskClass(), Task.class.getName() },
"Class does not implement Task interface");
}
}
catch (IllegalAccessException iae) {
errors.rejectValue("taskClass", "Scheduler.taskForm.illegalAccessException", new Object[] { taskDefinition
.getTaskClass() }, "Illegal access exception.");
}
catch (InstantiationException ie) {
errors.rejectValue("taskClass", "Scheduler.taskForm.instantiationException", new Object[] { taskDefinition
.getTaskClass() }, "Error creating new instance of class.");
}
catch (ClassNotFoundException cnfe) {
errors.rejectValue("taskClass", "Scheduler.taskForm.classNotFoundException", new Object[] { taskDefinition
.getTaskClass() }, "Class not found error.");
}
}
}
}