UML-to-Java transformation input

The Java™ elements that the transformation transforms depends on the source UML elements and their characteristics.

The following table lists which UML elements transform into which Java elements.

UML element	Java element
Package	Java package with the same name
Package with the <<perspective>> stereotype	Ignored
Package with the <<analysis>> or <<Analysis>> keyword	Ignored
Class	Java class with the same name and visibility
Class with an isLeaf property	Java class is final if `true`
Class with an isAbstract property	Java class is abstract if `true`
Class with a generalization relationship	Java class extends the specified superclass
Implementation	Java class implements the specified interface
Realization relationship between a class and an interface	Java class implements the specified interface
Interface	Java interface with the same name and visibility
Interface with a generalization relationship	Java interface extends the specified interface
Enumeration	Java interface with the same name and visibility
Enumeration literal	Java field with the same name and visibility
Operation	Java method with the same name and visibility
Operation with an isStatic property	Java method is static if `true`
Operation with an isAbstract property	Java method is abstract if `true`
Operation with an isLeaf property	Java method is final if `true`
Operation with the same name as its class	Java constructor
Operation with the <<create>> stereotype	Java constructor
Parameter	Java parameter with the same name
Parameter with a type property	Java parameter has the specified type, which can be another class or a primitive type
Parameter with a direction property	Java method has a return <param type> if it is set to return Java method with <param type> <param name> in its method signature if it is not set to return
Parameter or property with multiplicities:
0...1	Attribute, pointer, or reference
1	Attribute
N (N>1)	Array
1.., , or x..y	See the following table
Property	Java field with the same name and visibility
Property with an isStatic property	Java field is static if `true`
Property with an isLeaf property	Java field is final if `true`
Property with a type property	Java field has the specified type, which can be another class or a primitive type

Note: Some characters, such as a space, are not valid in Java identifiers. The transformation replaces invalid characters with an underscore (_) to create a valid identifier. This replacement can cause name conflicts that prevent the transformation from generating duplicate classes and interfaces. To avoid these replacement issues, rename the elements or use the mapping feature to specify an alternate name that does not modify the source model.

The following table lists how the transformation processes parameters and properties with certain multiplicity.

isOrdered property	isUnique property	UML collection	Generated Java type
`true`	`true`	Ordered Set	java.util.SortedSet
`true`	`false`	Sequence	java.util.List
`false`	`true`	Set	java.util.Set
`false`	`false`	Bag	java.util.Collection