org.activiti.engine.impl.variable
接口 
CacheableVariable
EntityManagerSession
ValueFields
VariableType
VariableTypes
 
BooleanType
ByteArrayType
CustomObjectType
DateType
DefaultVariableTypes
DeserializedObject
DoubleType
EntityManagerSessionFactory
EntityManagerSessionImpl
EntityMetaData
HistoricJPAEntityVariableType
IntegerType
JPAEntityMappings
JPAEntityScanner
JPAEntityVariableType
LongType
NullType
SerializableType
ShortType
StringType
UUIDType