org.exolab.castor.xml

Class Introspector

java.lang.Object

org.exolab.castor.xml.Introspector

All Implemented Interfaces:

PropertyChangeListener, EventListener

public final class Introspector
extends Object
implements PropertyChangeListener

A Helper class for the Marshaller and Unmarshaller, basically the common code base between the two. This class handles the introspection to dynamically create descriptors.

Version:

$Revision$ $Date: 2006-04-14 04:14:43 -0600 (Fri, 14 Apr 2006) $

Author:

Keith Visco

Constructor Summary

Constructors

Constructor and Description
Introspector() Creates a new instance of the Introspector.
Introspector(ClassLoader classLoader) Creates a new instance of the Introspector.

Method Summary

Modifier and Type	Method and Description
void	addFieldHandlerFactory(FieldHandlerFactory factory) Registers the given "generalized" FieldHandlerFactory with this Introspector.
XMLClassDescriptor	generateClassDescriptor(Class c) Creates an XMLClassDescriptor for the given class by using Reflection.
XMLClassDescriptor	generateClassDescriptor(Class c, PrintWriter errorWriter) Creates an XMLClassDescriptor for the given class by using Reflection.
NodeType	getPrimitiveNodeType() Returns the NodeType for java primitives
static boolean	introspected(XMLClassDescriptor descriptor) Returns true if the given XMLClassDescriptor was created via introspection
static boolean	isCollection(Class clazz) Returns true if the given Class is an instance of a collection class.
static boolean	isMapCollection(Class clazz) Returns true if the given Class is an instance of a collection class.
static boolean	marshallable(Class type) Returns true if the given Class can be marshalled.
void	propertyChange(PropertyChangeEvent event)
boolean	removeFieldHandlerFactory(FieldHandlerFactory factory) Removes the given FieldHandlerFactory from this Introspector
void	setInternalContext(InternalContext internalContext)
void	setNaming(XMLNaming naming) Sets the Naming conventions to be used by the Introspector
void	setPrimitiveNodeType(NodeType nodeType) Sets the NodeType for primitives.
void	setSaveMapKeys(boolean saveMapKeys) Sets whether or not keys from Hastable / Map instances should be saved in the XML.
void	setWrapCollections(boolean wrapCollections) Sets whether or not collections (arrays, vectors, etc) should be wrapped in a container element.
static String	toJavaName(String name, boolean upperFirst) Converts the given xml name to a Java name.

Methods inherited from class java.lang.Object

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

Constructor Detail

Introspector

public Introspector()

Creates a new instance of the Introspector.

Introspector

public Introspector(ClassLoader classLoader)

Creates a new instance of the Introspector.

Parameters:

classLoader -

Method Detail

setInternalContext

public void setInternalContext(InternalContext internalContext)

addFieldHandlerFactory

public void addFieldHandlerFactory(FieldHandlerFactory factory)

Registers the given "generalized" FieldHandlerFactory with this Introspector.

Parameters:

factory - the FieldHandlerFactory to add to this introspector

Throws:

IllegalArgumentException - if the given factory is null

getPrimitiveNodeType

public NodeType getPrimitiveNodeType()

Returns the NodeType for java primitives

Returns:

the NodeType for java primitives

generateClassDescriptor

public XMLClassDescriptor generateClassDescriptor(Class c)
                                           throws MarshalException

Creates an XMLClassDescriptor for the given class by using Reflection.

Parameters:

c - the Class to create the XMLClassDescriptor for

Returns:

the new XMLClassDescriptor created for the given class

Throws:

MarshalException - when an error occurs during the creation of the ClassDescriptor.

generateClassDescriptor

public XMLClassDescriptor generateClassDescriptor(Class c,
                                                  PrintWriter errorWriter)
                                           throws MarshalException

Creates an XMLClassDescriptor for the given class by using Reflection.

Parameters:

c - the Class to create the XMLClassDescriptor for

errorWriter - a PrintWriter to print error information to

Returns:

the new XMLClassDescriptor created for the given class

Throws:

MarshalException - when an error occurs during the creation of the ClassDescriptor.

removeFieldHandlerFactory

public boolean removeFieldHandlerFactory(FieldHandlerFactory factory)

Removes the given FieldHandlerFactory from this Introspector

Parameters:

factory - the FieldHandlerFactory to remove

Returns:

true if the given FieldHandlerFactory was removed, or false otherwise.

Throws:

IllegalArgumentException - if the given factory is null

setWrapCollections

public void setWrapCollections(boolean wrapCollections)

Sets whether or not collections (arrays, vectors, etc) should be wrapped in a container element. For example:

    <foos>
       <foo>foo1</foo>
       <foo>foo2</foo>
    </foos>

   instead of the default:

    <foos>foo1<foos>
    <foos>foo2</foos>

 

Parameters:

wrapCollections - a boolean that when true indicates collections should be wrapped in a container element.

introspected

public static boolean introspected(XMLClassDescriptor descriptor)

Returns true if the given XMLClassDescriptor was created via introspection

marshallable

public static boolean marshallable(Class type)

Returns true if the given Class can be marshalled.

Parameters:

type - the Class to check marshallability for.

Returns:

true if the given Class can be marshalled.

setNaming

public void setNaming(XMLNaming naming)

Sets the Naming conventions to be used by the Introspector

Parameters:

naming - the implementation of Naming to use. A value of null, will reset the XMLNaming to the default specified in the castor.properties file.

setPrimitiveNodeType

public void setPrimitiveNodeType(NodeType nodeType)

Sets the NodeType for primitives. If the NodeType is NodeType.Element, all primitives will be treated as Elements, otherwise all primitives will be treated as Attributes.

Parameters:

nodeType - the NodeType to use for primitive values.

setSaveMapKeys

public void setSaveMapKeys(boolean saveMapKeys)

Sets whether or not keys from Hastable / Map instances should be saved in the XML.

Note: This is true by default since Castor 0.9.5.3

Parameters:

saveMapKeys - a boolean that when true indicates keys from Hashtable or Map instances should be saved. Otherwise only the value object is saved.

toJavaName

public static String toJavaName(String name,
                                boolean upperFirst)

Converts the given xml name to a Java name.

Parameters:

name - the name to convert to a Java Name

upperFirst - a flag to indicate whether or not the the first character should be converted to uppercase.

isCollection

public static boolean isCollection(Class clazz)

Returns true if the given Class is an instance of a collection class.

isMapCollection

public static boolean isMapCollection(Class clazz)

Returns true if the given Class is an instance of a collection class.

propertyChange

public void propertyChange(PropertyChangeEvent event)

Specified by:

propertyChange in interface PropertyChangeListener