org.apache.openjpa.util

Class ProxyManagerImpl

java.lang.Object

org.apache.openjpa.util.ProxyManagerImpl

All Implemented Interfaces:

ProxyManager

public class ProxyManagerImpl
extends Object
implements ProxyManager

Default implementation of the ProxyManager interface.

Author:

Abe White

Constructor Summary

Constructors

Constructor and Description
ProxyManagerImpl()

Method Summary

Modifier and Type	Method and Description
protected boolean	allowsDuplicates(Class type) Return whether the given collection type allows duplicates.
Object	copyArray(Object orig) Return a new array of the same component type as the given array and containing the same elements.
Calendar	copyCalendar(Calendar orig) Return a copy of the given calendar with the same information.
Collection	copyCollection(Collection orig) Return a new collection of the same type as the given one with a copy of all contained elements.
Object	copyCustom(Object orig) Return a copy of the given object with the same information, or null if this manager cannot copy the object.
Date	copyDate(Date orig) Return a copy of the given date with the same information.
Map	copyMap(Map orig) Return a new map of the same type as the given one with a copy of all contained key/value pairs.
protected Constructor	findCopyConstructor(Class cls) Find an appropriate copy constructor for the given type, or return null if none.
protected Method	findGetter(Class type, Method setter) Return the getter corresponding to the given setter, or null.
protected serp.bytecode.BCClass	generateProxyBeanBytecode(Class type, boolean runtime) Generate the bytecode for a bean proxy for the given type.
protected serp.bytecode.BCClass	generateProxyCalendarBytecode(Class type, boolean runtime) Generate the bytecode for a calendar proxy for the given type.
protected serp.bytecode.BCClass	generateProxyCollectionBytecode(Class type, boolean runtime) Generate the bytecode for a collection proxy for the given type.
protected serp.bytecode.BCClass	generateProxyDateBytecode(Class type, boolean runtime) Generate the bytecode for a date proxy for the given type.
protected serp.bytecode.BCClass	generateProxyMapBytecode(Class type, boolean runtime) Generate the bytecode for a map proxy for the given type.
boolean	getAssertAllowedType() Whether to perform runtime checks to ensure that all elements added to collection and map proxies are the proper element/key/value type as defined by the metadata.
boolean	getDelayCollectionLoading() Whether loading of collections should be delayed until an operation is performed that requires them to be loaded.
boolean	getTrackChanges() Whether proxies produced by this factory will use ChangeTrackers to try to cut down on data store operations at the cost of some extra bookkeeping overhead.
Collection	getUnproxyable() Return a mutable view of class names we know cannot be proxied correctly by this manager.
protected boolean	isOrdered(Class type) Return whether the given collection type maintains an artificial ordering.
protected boolean	isSetter(Method meth) Return whether the given method is a setter.
protected boolean	isUnproxyable(Class type) Return whether the given type is known to be unproxyable.
protected Class	loadBuildTimeProxy(Class type, ClassLoader loader) Load the proxy class generated at build time for the given type, returning null if none exists.
protected Class<?>	loadDelayedProxy(Class<?> type)
static void	main(String[] args) Usage: java org.apache.openjpa.util.proxy.ProxyManagerImpl [option]* <class name>+ Where the following options are recognized: -utils/-u <number>: Generate proxies for the standard java.util collection, map, date, and calendar classes of the given Java version.
Proxy	newCalendarProxy(Class type, TimeZone zone) Return a new calendar proxy.
Proxy	newCollectionProxy(Class type, Class elementType, Comparator compare, boolean autoOff) Return a proxy for the given collection type.
Proxy	newCustomProxy(Object orig, boolean autoOff) Return a proxy for the given object, or null if this manager cannot proxy the object.
Proxy	newDateProxy(Class type) Return a new date proxy.
Proxy	newMapProxy(Class type, Class keyType, Class elementType, Comparator compare, boolean autoOff) Return a proxy for the given map type.
void	setAssertAllowedType(boolean assertType) Whether to perform runtime checks to ensure that all elements added to collection and map proxies are the proper element/key/value type as defined by the metadata.
void	setDelayCollectionLoading(boolean delay) Whether loading of collections should be delayed until an operation is performed that requires them to be loaded.
void	setTrackChanges(boolean track) Whether proxies produced by this factory will use ChangeTrackers to try to cut down on data store operations at the cost of some extra bookkeeping overhead.
void	setUnproxyable(String clsNames) Provided for auto-configuration.
protected Class	toProxyableCollectionType(Class type) Return the concrete type for proxying.
protected Class	toProxyableMapType(Class type) Return the concrete type for proxying.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProxyManagerImpl

public ProxyManagerImpl()

Method Detail

getTrackChanges

public boolean getTrackChanges()

Whether proxies produced by this factory will use ChangeTrackers to try to cut down on data store operations at the cost of some extra bookkeeping overhead. Defaults to true.

setTrackChanges

public void setTrackChanges(boolean track)

Whether proxies produced by this factory will use ChangeTrackers to try to cut down on data store operations at the cost of some extra bookkeeping overhead. Defaults to true.

getAssertAllowedType

public boolean getAssertAllowedType()

Whether to perform runtime checks to ensure that all elements added to collection and map proxies are the proper element/key/value type as defined by the metadata. Defaults to false.

setAssertAllowedType

public void setAssertAllowedType(boolean assertType)

Whether to perform runtime checks to ensure that all elements added to collection and map proxies are the proper element/key/value type as defined by the metadata. Defaults to false.

getDelayCollectionLoading

public boolean getDelayCollectionLoading()

Whether loading of collections should be delayed until an operation is performed that requires them to be loaded. This property only applies to proxies that implement java.util.Collection (ie. not arrays or maps). Defaults to false.

Specified by:

getDelayCollectionLoading in interface ProxyManager

setDelayCollectionLoading

public void setDelayCollectionLoading(boolean delay)

Whether loading of collections should be delayed until an operation is performed that requires them to be loaded. Defaults to false.

getUnproxyable

public Collection getUnproxyable()

Return a mutable view of class names we know cannot be proxied correctly by this manager.

setUnproxyable

public void setUnproxyable(String clsNames)

Provided for auto-configuration. Add the given semicolon-separated class names to the set of class names we know cannot be proxied correctly by this manager.

copyArray

public Object copyArray(Object orig)

Description copied from interface: ProxyManager

Return a new array of the same component type as the given array and containing the same elements. Works for both primitive and object array types.

Specified by:

copyArray in interface ProxyManager

copyCollection

public Collection copyCollection(Collection orig)

Description copied from interface: ProxyManager

Return a new collection of the same type as the given one with a copy of all contained elements.

Specified by:

copyCollection in interface ProxyManager

newCollectionProxy

public Proxy newCollectionProxy(Class type,
                                Class elementType,
                                Comparator compare,
                                boolean autoOff)

Description copied from interface: ProxyManager

Return a proxy for the given collection type. The returned collection will allow only addition of elements assignable from the given element type and will use the given comparator, if it is not null.

Specified by:

newCollectionProxy in interface ProxyManager

copyMap

public Map copyMap(Map orig)

Description copied from interface: ProxyManager

Return a new map of the same type as the given one with a copy of all contained key/value pairs.

Specified by:

copyMap in interface ProxyManager

newMapProxy

public Proxy newMapProxy(Class type,
                         Class keyType,
                         Class elementType,
                         Comparator compare,
                         boolean autoOff)

Description copied from interface: ProxyManager

Return a proxy for the given map type. The returned map will allow only addition of keys/values assignable from the given keyType/valueType, and will use the given comparator, if it is not null.

Specified by:

newMapProxy in interface ProxyManager

copyDate

public Date copyDate(Date orig)

Description copied from interface: ProxyManager

Return a copy of the given date with the same information.

Specified by:

copyDate in interface ProxyManager

newDateProxy

public Proxy newDateProxy(Class type)

Description copied from interface: ProxyManager

Return a new date proxy.

Specified by:

newDateProxy in interface ProxyManager

copyCalendar

public Calendar copyCalendar(Calendar orig)

Description copied from interface: ProxyManager

Return a copy of the given calendar with the same information.

Specified by:

copyCalendar in interface ProxyManager

newCalendarProxy

public Proxy newCalendarProxy(Class type,
                              TimeZone zone)

Description copied from interface: ProxyManager

Return a new calendar proxy.

Specified by:

newCalendarProxy in interface ProxyManager

copyCustom

public Object copyCustom(Object orig)

Description copied from interface: ProxyManager

Return a copy of the given object with the same information, or null if this manager cannot copy the object.

Specified by:

copyCustom in interface ProxyManager

newCustomProxy

public Proxy newCustomProxy(Object orig,
                            boolean autoOff)

Description copied from interface: ProxyManager

Return a proxy for the given object, or null if this manager cannot proxy the object.

Specified by:

newCustomProxy in interface ProxyManager

toProxyableCollectionType

protected Class toProxyableCollectionType(Class type)

Return the concrete type for proxying.

toProxyableMapType

protected Class toProxyableMapType(Class type)

Return the concrete type for proxying.

isUnproxyable

protected boolean isUnproxyable(Class type)

Return whether the given type is known to be unproxyable.

loadBuildTimeProxy

protected Class loadBuildTimeProxy(Class type,
                                   ClassLoader loader)

Load the proxy class generated at build time for the given type, returning null if none exists.

loadDelayedProxy

protected Class<?> loadDelayedProxy(Class<?> type)

generateProxyCollectionBytecode

protected serp.bytecode.BCClass generateProxyCollectionBytecode(Class type,
                                                                boolean runtime)

Generate the bytecode for a collection proxy for the given type.

generateProxyMapBytecode

protected serp.bytecode.BCClass generateProxyMapBytecode(Class type,
                                                         boolean runtime)

Generate the bytecode for a map proxy for the given type.

generateProxyDateBytecode

protected serp.bytecode.BCClass generateProxyDateBytecode(Class type,
                                                          boolean runtime)

Generate the bytecode for a date proxy for the given type.

generateProxyCalendarBytecode

protected serp.bytecode.BCClass generateProxyCalendarBytecode(Class type,
                                                              boolean runtime)

Generate the bytecode for a calendar proxy for the given type.

generateProxyBeanBytecode

protected serp.bytecode.BCClass generateProxyBeanBytecode(Class type,
                                                          boolean runtime)

Generate the bytecode for a bean proxy for the given type.

allowsDuplicates

protected boolean allowsDuplicates(Class type)

Return whether the given collection type allows duplicates.

isOrdered

protected boolean isOrdered(Class type)

Return whether the given collection type maintains an artificial ordering.

isSetter

protected boolean isSetter(Method meth)

Return whether the given method is a setter.

findGetter

protected Method findGetter(Class type,
                            Method setter)

Return the getter corresponding to the given setter, or null.

findCopyConstructor

protected Constructor findCopyConstructor(Class cls)

Find an appropriate copy constructor for the given type, or return null if none.

main

public static void main(String[] args)
                 throws ClassNotFoundException,
                        IOException

Usage: java org.apache.openjpa.util.proxy.ProxyManagerImpl [option]* <class name>+
Where the following options are recognized:

• -utils/-u <number>: Generate proxies for the standard java.util collection, map, date, and calendar classes of the given Java version. Use 4 for Java 1.4, 5 for Java 5, etc.

The main method generates .class files for the proxies to the classes given on the command line. It writes the generated classes to beside the ProxyManagerImpl.class file if possible; otherwise it writes to the current directory. The proxy manager looks for these classes before generating its own proxies at runtime.

Throws:

ClassNotFoundException

IOException