net.dpml.component
Class Composition

java.lang.Object
  net.dpml.lang.Part
      net.dpml.component.Composition

All Implemented Interfaces:

Directive, Serializable

Direct Known Subclasses:

DefaultComposition

public abstract class Composition

extends Part

implements Directive

Component composition.

Version:

1.0.1

Author:

Digital Product Meta Library

See Also:

Serialized Form

Field Summary

Fields inherited from class net.dpml.lang.Part

PART_FOOTER, PART_HEADER, PART_SCHEMA_URN, VALUE_ENCODER, XML_HEADER

Constructor Summary

Composition(Logger logger, Info info, Classpath classpath, Controller controller, Directive directive, String label)
Creation of a new abstract composition instance.

Method Summary

boolean	equals(Object other) Return true if this object is equal to the supplied object.
protected Object	getContent(Class c) Return the part content or null if the result type is unresolvable relative to the supplied class argument.
Controller	getController() Return the assigned controller.
Directive	getDirective() Get the deployment directive.
Model	getModel() Get the deployment model.
int	hashCode() Return the hashcode for the instance.
Object	instantiate(Object[] args) Instantiate a value.
Component	newComponent() Create and return a new component using the deplyment model established by the part.

Methods inherited from class net.dpml.lang.Part

encode, encodeStrategy, getClassLoader, getClasspath, getContent, getContent, getInfo, getLogger, load, load

Methods inherited from class java.lang.Object

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

Constructor Detail

Composition

public Composition(Logger logger,
                   Info info,
                   Classpath classpath,
                   Controller controller,
                   Directive directive,
                   String label)
            throws IOException

Creation of a new abstract composition instance.

Parameters:

logger - the assigned logging channel

info - the part info descriptor

classpath - the part classpath definition

controller - the part controller

directive - the part deployment strategy directive

label - debug label

Throws:

IOException - if an I/O error occurs

Method Detail

getController

public Controller getController()

Return the assigned controller.

Returns:

the controller

getContent

protected Object getContent(Class c)
                     throws IOException

Return the part content or null if the result type is unresolvable relative to the supplied class argument. Class types recognized over and above the Part class include Directive, Model, Component and Controller.

Overrides:

getContent in class Part

Parameters:

c - the content class

Returns:

the content

Throws:

IOException - if an IO error occurs

getDirective

public Directive getDirective()

Get the deployment directive.

Returns:

the deployment directive

getModel

public Model getModel()

Get the deployment model.

Returns:

the deployment model

newComponent

public Component newComponent()

Create and return a new component using the deplyment model established by the part.

Returns:

the component

instantiate

public Object instantiate(Object[] args)
                   throws Exception

Instantiate a value.

Specified by:

instantiate in class Part

Parameters:

args - supplimentary arguments

Returns:

the resolved instance

Throws:

Exception - if a deployment error occurs

equals

public boolean equals(Object other)

Return true if this object is equal to the supplied object.

Overrides:

equals in class Part

Parameters:

other - the object to evaluate

Returns:

the equality status

hashCode

public int hashCode()

Return the hashcode for the instance.

Overrides:

hashCode in class Part

Returns:

the instance hashcode