org.javaruntype.typedef
Class TypeDef

Object
  org.javaruntype.typedef.TypeDef

All Implemented Interfaces:

Serializable

public final class TypeDef
extends Object
implements Serializable

This class represents a Type Definition. A Type Definition specifies which type parameters (if any) can a class take, and the relation that exists among them. It corresponds to the way a class can be defined in its .java file.

Examples of type definitions are:

• app.pack.ClassOne
• app.pack.ClassTwo<E>
• app.pack.ClassThree<E, T>
• app.pack.ClassFour<E, T extends E>
• app.pack.ClassFive<E, T extends java.io.Serializable>
• app.pack.ClassSix<E, T extends E & java.io.Serializable>
• app.pack.ClassSeven<E, T, X extends E & java.util.Collection<T>>
• app.pack.ClassEight<E, T, X extends E & java.util.Collection<? extends T>>
• etc...

These type definitions serve as a template for creating types (Type class), which resolve all type variables present in the type definition (for example, for a TypeDef object java.util.Collection<E> we can get a Type object java.util.Collection<java.lang.String>

Objects of this class are never created directly. To obtain a TypeDef object, the diverse methods in the TypeDefs class should be used.

Objects of this class are immutable, and thus thread-safe. Also, in order to avoid excessive memory usage, an internal synchronized cache exists which prevents the same TypeDef from being instantiated more than once (so, if two TypeDef objects are equal, this will mean that they are the same object).

Since:

1.0

Author:

Daniel Fernández

See Also:

Serialized Form

Method Summary

boolean	equals(Object obj)
Class<?>	getComponentClass() Returns the component class of the type definition.
String	getName() Returns the name of the type definition.
TypeDefVariable[]	getVariables() Returns the variables of the type definition.
int	hashCode()
String	toString()

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

getComponentClass

public Class<?> getComponentClass()

Returns the component class of the type definition. For example, if the type definition is java.util.Collection<E>, this method will return java.lang.Class<java.util.Collection>

Returns:

the component class.

getVariables

public TypeDefVariable[] getVariables()

Returns the variables of the type definition.

Returns:

the type definition variables.

getName

public String getName()

Returns the name of the type definition. For example: "java.util.Collection<E>"

Returns:

the name of the type definition.

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object