org.apache.openjpa.lib.conf
Class AbstractProductDerivation

java.lang.Object
  org.apache.openjpa.lib.conf.AbstractProductDerivation

All Implemented Interfaces:

ProductDerivation

Direct Known Subclasses:

JDBCPersistenceProductDerivation, JDBCProductDerivation, PersistenceProductDerivation

public abstract class AbstractProductDerivation
extends Object
implements ProductDerivation

Abstract no-op product derivation for easy extension.

Since:

0.4.1

Author:

Pinaki Poddar

Field Summary

Fields inherited from interface org.apache.openjpa.lib.conf.ProductDerivation

TYPE_FEATURE, TYPE_PRODUCT

Constructor Summary

AbstractProductDerivation()

Method Summary

boolean	afterSpecificationSet(Configuration conf) Called after the specification has been set.
boolean	beforeConfigurationConstruct(ConfigurationProvider cp) Provides the instance with a callback to mutate the initial properties of the ConfigurationProvider.
boolean	beforeConfigurationLoad(Configuration conf) Provides the instance with the opportunity to mutate conf before the user configuration is applied.
String	getConfigurationPrefix() Return the configuration prefix for properties of this product.
ConfigurationProvider	load(File file, String anchor) Load given file, or return null if it is not a file this receiver understands.
ConfigurationProvider	load(String resource, String anchor, ClassLoader loader) Load the given given resource into the returned ConfigurationProvider, or return null if it is not a resource this receiver understands.
ConfigurationProvider	loadDefaults(ClassLoader loader) Load defaults into the returned ConfigurationProvider, or return null if no defaults are found.
ConfigurationProvider	loadGlobals(ClassLoader loader) Load globals into the returned ConfigurationProvider, or return null if no globals are found.
void	validate() Ensure that this derivation is valid.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.openjpa.lib.conf.ProductDerivation

getType

Constructor Detail

AbstractProductDerivation

public AbstractProductDerivation()

Method Detail

getConfigurationPrefix

public String getConfigurationPrefix()

Description copied from interface: ProductDerivation

Return the configuration prefix for properties of this product.

Specified by:

getConfigurationPrefix in interface ProductDerivation

validate

public void validate()
              throws Exception

Description copied from interface: ProductDerivation

Ensure that this derivation is valid. This action might consist of loading classes for the product this derivation represents to be sure they exist. Throw any throwable to indicate an invalid derivation. Invalid derivations will not be used.

Specified by:

validate in interface ProductDerivation

Throws:

Exception

loadGlobals

public ConfigurationProvider loadGlobals(ClassLoader loader)
                                  throws Exception

Description copied from interface: ProductDerivation

Load globals into the returned ConfigurationProvider, or return null if no globals are found.

Specified by:

loadGlobals in interface ProductDerivation

Throws:

Exception

loadDefaults

public ConfigurationProvider loadDefaults(ClassLoader loader)
                                   throws Exception

Description copied from interface: ProductDerivation

Load defaults into the returned ConfigurationProvider, or return null if no defaults are found.

Specified by:

loadDefaults in interface ProductDerivation

Throws:

Exception

load

public ConfigurationProvider load(String resource,
                                  String anchor,
                                  ClassLoader loader)
                           throws Exception

Description copied from interface: ProductDerivation

Load the given given resource into the returned ConfigurationProvider, or return null if it is not a resource this receiver understands. The given class loader may be null.

Specified by:

load in interface ProductDerivation

anchor - optional named anchor within a multiple-configuration resource

Throws:

Exception

load

public ConfigurationProvider load(File file,
                                  String anchor)
                           throws Exception

Description copied from interface: ProductDerivation

Load given file, or return null if it is not a file this receiver understands.

Specified by:

load in interface ProductDerivation

anchor - optional named anchor within a multiple-configuration file

Throws:

Exception

beforeConfigurationConstruct

public boolean beforeConfigurationConstruct(ConfigurationProvider cp)

Description copied from interface: ProductDerivation

Provides the instance with a callback to mutate the initial properties of the ConfigurationProvider. This is primarily to alter or add properties that determine what type of configuration is constructed, and therefore is typically used at runtime only.

Specified by:

beforeConfigurationConstruct in interface ProductDerivation

Returns:

true if given ConfigurationProvider has been mutated.

beforeConfigurationLoad

public boolean beforeConfigurationLoad(Configuration conf)

Description copied from interface: ProductDerivation

Provides the instance with the opportunity to mutate conf before the user configuration is applied.

Specified by:

beforeConfigurationLoad in interface ProductDerivation

Returns:

true if given Configuration has been mutated.

afterSpecificationSet

public boolean afterSpecificationSet(Configuration conf)

Description copied from interface: ProductDerivation

Called after the specification has been set.

Specified by:

afterSpecificationSet in interface ProductDerivation

Returns:

true if given Configuration has been mutated.