Package org.activiti.engine.impl.util

Class CollectionUtil

  • public class CollectionUtil
extends Object
    helper/convenience methods for working with collections.

    • Method Detail

      • singletonMap

        public static Map<String,​Object> singletonMap​(String key,
                                                    Object value)
        Helper method that creates a singleton map. Alternative for singletonMap()), since that method returns a generic typed map depending on the input type, but we often need a map.

      • map

        public static Map<String,​Object> map​(Object... objects)
        Helper method to easily create a map with keys of type String and values of type Object. Null values are allowed.
        Parameters:
        objects - varargs containing the key1, value1, key2, value2, etc. Note: although an Object, we will cast the key to String internally
        Throws:
        ActivitiIllegalArgumentException - when objects are not even or key/value are not expected types

      • mapOfClass

        public static <T> Map<String,​T> mapOfClass​(Class<T> clazz,
                                                 Object... objects)
        Helper method to easily create a map with keys of type String and values of a given Class. Null values are allowed.
        Parameters:
        clazz - the target Value class
        objects - varargs containing the key1, value1, key2, value2, etc. Note: although an Object, we will cast the key to String internally
        Throws:
        ActivitiIllegalArgumentException - when objects are not even or key/value are not expected types

      • isEmpty

        public static boolean isEmpty​(Collection<?> collection)

      • isNotEmpty

        public static boolean isNotEmpty​(Collection<?> collection)