/**

  * Copyright 2005-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.krad.uif.util;

 import org.apache.commons.lang.StringUtils;

 /**

  * Defines functions that can be used in el expressions within

  * the UIF dictionary files

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class ExpressionFunctions {

     /**

      * Checks whether the given class parameter is assignable from the given object class

      * parameter

      *

      * @param assignableClass - class to use for assignable to

      * @param objectClass - class to use for assignable from

      * @return boolean true if the object class is of type assignable class, false if not

      */

     public static boolean isAssignableFrom(Class<?> assignableClass, Class<?> objectClass) {

         return assignableClass.isAssignableFrom(objectClass);

     }

     /**

      * Checks whether the given value is null or blank string

      *

      * @param value - property value to check

      * @return boolean true if value is null or blank, false if not

      */

     public static boolean empty(Object value) {

         return (value == null) || (StringUtils.isBlank(value.toString()));

     }

     /**

      * Returns the name for the given class

      *

      * @param clazz - class object to return name for

      * @return String class name or empty string if class is null

      */

     public static String getName(Class<?> clazz) {

         if (clazz == null) {

             return "";

         } else {

             return clazz.getName();

         }

     }

 }