JPatternUtils (Version 1.1)

JPatternUtils is a general-purpose toolkit facilitating the use of common design patterns in Java.

See:
Description

Packages

org.jpu.patterns.common	Generic utilities used within JPatternUtils.
org.jpu.patterns.factory	Factory-related utilities.
org.jpu.patterns.proxy	Proxy-related utilities.
org.jpu.patterns.proxy.test	Code to test the jpu.patterns.proxy package.
org.jpu.patterns.serviceLocator	Utilities related to the Service Locator pattern.
org.jpu.patterns.serviceLocator.onePerContext	OnePerContextManager-based subclasses of the locators defined in org.jpu.patterns.serviceLocator.
org.jpu.patterns.serviceLocator.onePerContext.test
org.jpu.patterns.serviceLocator.test
org.jpu.patterns.singleton.onePerContext	Utilities related to the "OnePerContext" variant of Singleton.
org.jpu.patterns.singleton.onePerContext.test
org.jpu.patterns.transferObject	Utilities related to the Transfer Object pattern.

JPatternUtils is a general-purpose toolkit facilitating the use of common design patterns in Java. The main focus is on GoF patterns and J2EE Blueprints and variations on them, but additional patterns will be incorporated as needed.

A major design goal for JPatternUtils is a very high level of extensibility, in order to allow the toolkit to be used in the widest possible range of applications. This translates into the following:

• The toolkit makes heavy use of strategies, which make it easy for clients to tailor the toolkit's behavior.
• Most of the classes are designed from the outset to permit easy extension through inheritance. Overridable methods are clearly documented to describe what subclass implementations may and may not do.
• The toolkit does not rely on bytecode instrumentation or code generation of any kind, so it will not affect your build architecture.
• Any classes that need to access external configuration sources do so only through strategy interfaces for which the client can supply a custom implementation. Thus you can use any configuration source you wish.
• There are no dependencies on any external files or system properties, except those implied by Jakarta Commons Logging.
• External library dependencies are limited to Jakarta Commons components (listed below).

Follow the links below for detailed documentation on the key classes and interfaces currently provided by JPatternUtils

• Proxy pattern: JPUInvocationHandler and ProxyBean
• Service Locator pattern: ILocator and Locator
• Factory pattern: IPrototypeFactory and PrototypeFactory
• Singleton pattern: IOnePerContextManager and OnePerContextManager

Downloading

JPatternUtils is hosted by SourceForge.net. Its project page is www.sourceforge.net/projects/jpatternutils.

To download the latest tarballs, go here:

jpatternutils-1.1.tar.gz (binary)

jpatternutils-1.1-src.tar.gz (source)

Installation

To use JPatternUtils, you must include the jar files for the following Jakarta Commons components in your CLASSPATH:

• Commons Lang
• Commons IO
• Commons Collections
• Commons Bean Utils
• Commons Logging

Recent versions of these jars are included in the distribution under the jars directory.

JPatternUtils is compatible with Java 1.3.1 or higher.

License

JPatternUtils is released under the Apache Software License.

Contributing

If you have a contribution to make to JPatternUtils, please email the project administrator.