Package org.apache.openjpa.enhance

Class DynamicStorageGenerator

java.lang.Object

org.apache.openjpa.enhance.DynamicStorageGenerator

Direct Known Subclasses:

PCDataGenerator

public class DynamicStorageGenerator
extends Object

Factory for creating new DynamicStorage classes. Can be extended to decorate/modify the generated instances behavior.

Since:

0.3.2.0

Author:

Steve Kim, Mark Struberg rework to ASM

Field Summary

Fields

Modifier and Type	Field	Description
protected static final int	POLICY_EMPTY	Constant to not generate type set/get methods.
protected static final int	POLICY_EXCEPTION	Constant to throw an exception on invalid index passed to type set/get methods
protected static final int	POLICY_SILENT	Constant to be as silent as possible during invalid index passed to set/get type methods.

Constructor Summary

Constructors

Constructor	Description
DynamicStorageGenerator()

Method Summary

Modifier and Type	Method	Description
protected org.apache.xbean.asm9.tree.FieldNode	addBeanField(ClassNodeTracker bc, String name, Class type)	Add a bean field of the given name and type.
protected DynamicStorage	createFactory(ClassNodeTracker bc)	Create a stub factory instance for the given class.
protected void	declareClasses(ClassNodeTracker bc)	Add interface or superclass declarations to the generated class.
protected void	decorate(Object obj, ClassNodeTracker cls, int[] types)	Decorate the generated class.
protected Class	forType(int type)	Return the proper type for the given JavaTypes constant.
DynamicStorage	generateStorage(int[] types, Object obj)	Generate a generic DynamicStorage instance with the given array of JavaTypes constants and the given object as the user key for generation.
protected String	getClassName(Object obj)	Return a class name to use for the given user key.
protected int	getCreateFieldMethods(int type)	Return the policy constant for how to create type methods.
protected int	getFieldAccess()	Return the default field ACCESS constant for generated fields from Opcodes.
protected String	getFieldName(int index)	Return the name for the generated field at the given index.
protected Class	getWrapper(int type)	get the wrapper for the given JavaTypes constant.
protected Class	getWrapper(Class c)	Get the wrapper for the given type.
protected boolean	isCompatible(int fieldType, int storageType)	Return true if the given field type and storage type are compatible.

Methods inherited from class java.lang.Object

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

Field Details

POLICY_EXCEPTION

protected static final int POLICY_EXCEPTION

Constant to throw an exception on invalid index passed to type set/get methods

See Also:

• Constant Field Values

POLICY_EMPTY

protected static final int POLICY_EMPTY

Constant to not generate type set/get methods.

See Also:

• Constant Field Values

POLICY_SILENT

protected static final int POLICY_SILENT

Constant to be as silent as possible during invalid index passed to set/get type methods. On getting an Object, for example, null will be returned. However, on primitive gets, an exception will be thrown.

See Also:

• Constant Field Values

Constructor Details

DynamicStorageGenerator

public DynamicStorageGenerator()

Method Details

generateStorage

public DynamicStorage generateStorage(int[] types,
 Object obj)

Generate a generic DynamicStorage instance with the given array of JavaTypes constants and the given object as the user key for generation.

getClassName

protected String getClassName(Object obj)

Return a class name to use for the given user key. By default, returns the stringified key prefixed by PREFIX.

getFieldAccess

protected int getFieldAccess()

Return the default field ACCESS constant for generated fields from Opcodes.

getFieldName

protected String getFieldName(int index)

Return the name for the generated field at the given index. Returns "field" + i by default.

getCreateFieldMethods

protected int getCreateFieldMethods(int type)

Return the policy constant for how to create type methods.

decorate

protected void decorate(Object obj,
 ClassNodeTracker cls,
 int[] types)

Decorate the generated class.

createFactory

protected DynamicStorage createFactory(ClassNodeTracker bc)

Create a stub factory instance for the given class.

declareClasses

protected void declareClasses(ClassNodeTracker bc)

Add interface or superclass declarations to the generated class.

addBeanField

protected org.apache.xbean.asm9.tree.FieldNode addBeanField(ClassNodeTracker bc,
 String name,
 Class type)

Add a bean field of the given name and type.

isCompatible

protected boolean isCompatible(int fieldType,
 int storageType)

Return true if the given field type and storage type are compatible.

forType

protected Class forType(int type)

Return the proper type for the given JavaTypes constant.

getWrapper

protected Class getWrapper(int type)

get the wrapper for the given JavaTypes constant.

getWrapper

protected Class getWrapper(Class c)

Get the wrapper for the given type.