org.openmrs.logic.rule.definition.RuleDefinitionValidator.java Source code

Introduction

Here is the source code for org.openmrs.logic.rule.definition.RuleDefinitionValidator.java

Source

/**
 * 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.logic.rule.definition;

import java.util.Date;

import org.apache.commons.lang.StringUtils;
import org.openmrs.api.context.Context;
import org.openmrs.logic.LogicException;
import org.openmrs.logic.Rule;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

/**
 * Validator for {@link RuleDefinition}
 */
public class RuleDefinitionValidator implements Validator {

    @SuppressWarnings("unchecked")
    public boolean supports(Class c) {
        return c.equals(RuleDefinition.class);
    }

    public void validate(Object obj, Errors errors) {
        RuleDefinition rule = (RuleDefinition) obj;

        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "name", "error.null");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "language", "error.null");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "ruleContent", "error.null");

        if (StringUtils.isNotBlank(rule.getLanguage()) && StringUtils.isNotBlank(rule.getRuleContent())) {
            RuleDefinitionService service = Context.getService(RuleDefinitionService.class);
            LanguageHandler handler = service.getLanguageHandler(rule.getLanguage());
            Date originalDateChanged = rule.getDateChanged();
            try {
                rule.setDateChanged(new Date());
                Rule r = handler.compile(rule);
                if (r == null)
                    throw new LogicException("Unknown error compiling rule");
            } catch (Exception ex) {
                while (ex.getCause() != null && ex.getCause() != ex && ex.getCause() instanceof Exception)
                    ex = (Exception) ex.getCause();
                errors.rejectValue("ruleContent", ex.getMessage());
            } finally {
                rule.setDateChanged(originalDateChanged);
            }
        }
    }

}