Package org.activiti.engine.impl.util

Class CollectionUtil

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

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static boolean isEmpty​(java.util.Collection<?> collection)  
      static boolean isNotEmpty​(java.util.Collection<?> collection)  
      static java.util.Map<java.lang.String,​java.lang.Object> map​(java.lang.Object... objects)
      Helper method to easily create a map with keys of type String and values of type Object.
      static <T> java.util.Map<java.lang.String,​T> mapOfClass​(java.lang.Class<T> clazz, java.lang.Object... objects)
      Helper method to easily create a map with keys of type String and values of a given Class.
      static java.util.Map<java.lang.String,​java.lang.Object> singletonMap​(java.lang.String key, java.lang.Object value)
      Helper method that creates a singleton map.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Method Detail

      • singletonMap

        public static java.util.Map<java.lang.String,​java.lang.Object> singletonMap​(java.lang.String key,
                                                                                  java.lang.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 java.util.Map<java.lang.String,​java.lang.Object> map​(java.lang.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> java.util.Map<java.lang.String,​T> mapOfClass​(java.lang.Class<T> clazz,
                                                                     java.lang.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​(java.util.Collection<?> collection)

      • isNotEmpty

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