Package 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, Mark Struberg

  • Field Details

    • TYPE_OBJECT

      public static final org.apache.xbean.asm9.Type TYPE_OBJECT

  • Constructor Details

    • ProxyManagerImpl

      public ProxyManagerImpl()

  • Method Details

    • 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)

    • getProxyClassName

      protected static String getProxyClassName(Class type, boolean runtime)
      Return the name of the proxy class to generate for the given type.

    • generateProxyDateBytecode

      protected byte[] generateProxyDateBytecode(Class type, boolean runtime, String proxyClassName)
      Generate the bytecode for a date proxy for the given type.

    • generateProxyCalendarBytecode

      protected byte[] generateProxyCalendarBytecode(Class type, boolean runtime, String proxyClassName)
      Generate the bytecode for a calendar proxy for the given type.

    • generateProxyCollectionBytecode

      protected byte[] generateProxyCollectionBytecode(Class type, boolean runtime, String proxyClassName)
      Generate the bytecode for a collection proxy for the given type.

    • generateProxyMapBytecode

      protected byte[] generateProxyMapBytecode(Class type, boolean runtime, String proxyClassName)
      Generate the bytecode for a map proxy for the given type.

    • generateProxyBeanBytecode

      protected byte[] generateProxyBeanBytecode(Class type, boolean runtime, String proxyClassName)
      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