org.jhotdraw.xml

Class JavaPrimitivesDOMFactory

java.lang.Object

org.jhotdraw.xml.JavaPrimitivesDOMFactory

All Implemented Interfaces:

DOMFactory

Direct Known Subclasses:

DefaultDOMFactory

public class JavaPrimitivesDOMFactory
extends java.lang.Object
implements DOMFactory

JavaPrimitivesDOMFactory can be used to serialize Java primitive objects and DOMStorable objects.

The following Java primitive types are supported. Object wrappers are automatically unwrapped into their primitive types.

• null
• boolean
• byte
• short
• char
• int
• long
• float
• double
• string
• enum
• color (will be removed in a future revision of this class!)
• font (will be removed in a future revision of this class!)

Arrays of primitive types are supported, by appending the word "Array" to a primitive type name.

You can add support for additional primitive types by overriding the methods read and write.

In addition to the primitive types, this factory can store and read DOMStorable objects. No mapping for DOMStorable class names is performed. For example, if a DOMStorable object has the class name com.example.MyClass, then the DOM element has the same name, that is: <com.example.MyClass>.

Since no mapping between DOM element names and DOMStorable class names is performed, DOM's generated with JavaPrimitivesDOMFactory are not suited for long-term storage of objects. This is because a DOM element can not be read back into an object, if the class name of the object has changed.

You can implement a mapping by overriding the methods getName, create, getEnumName and getEnumValue.

Constructor Summary

Constructors

Constructor and Description
JavaPrimitivesDOMFactory()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	create(java.lang.String name) Creates an object from the specified element name.
protected java.lang.Enum	createEnum(java.lang.String name, java.lang.String value)
protected java.lang.String	getEnumName(java.lang.Enum o)
protected java.lang.String	getEnumValue(java.lang.Enum o)
java.lang.String	getName(java.lang.Object o) Returns the element name for the specified object.
java.lang.Object	read(DOMInput in) Reads the specified object from DOMInput.
void	write(DOMOutput out, java.lang.Object o) Writes the specified object to DOMOutput.

Methods inherited from class java.lang.Object

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

Constructor Detail

JavaPrimitivesDOMFactory

public JavaPrimitivesDOMFactory()

Method Detail

getName

public java.lang.String getName(java.lang.Object o)

Description copied from interface: DOMFactory

Returns the element name for the specified object.

Specified by:

getName in interface DOMFactory

create

public java.lang.Object create(java.lang.String name)

Description copied from interface: DOMFactory

Creates an object from the specified element name.

Specified by:

create in interface DOMFactory

getEnumName

protected java.lang.String getEnumName(java.lang.Enum o)

getEnumValue

protected java.lang.String getEnumValue(java.lang.Enum o)

createEnum

protected java.lang.Enum createEnum(java.lang.String name,
                                    java.lang.String value)

write

public void write(DOMOutput out,
                  java.lang.Object o)
           throws java.io.IOException

Description copied from interface: DOMFactory

Writes the specified object to DOMOutput.

This method is only ever called from DOMOutput. You should never call this method directly.

Specified by:

write in interface DOMFactory

o - The object to be written.

Throws:

java.io.IOException

read

public java.lang.Object read(DOMInput in)
                      throws java.io.IOException

Description copied from interface: DOMFactory

Reads the specified object from DOMInput.

This method is only ever called from DOMInput. You should never call this method directly.

If the object returned by this method is an instanceof DOMStorable then DOMInput invokes its read method.

Specified by:

read in interface DOMFactory

Parameters:

in - The DOMInput object which creates the object from an element in a DOM.

Throws:

java.io.IOException