org.apache.avalon.fortress.util

Class Service

java.lang.Object

org.apache.avalon.fortress.util.Service

public final class Service
extends java.lang.Object

This class handles looking up service providers on the class path. It implements the system described in: File Specification Under Service Provider. Note that this interface is very similar to the one they describe whiehc seems to be missing in the JDK. This class adapted from org.apache.batik.util.Service

Version:

1.0

Author:

Avalon Development Team

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.Class	POOLABLE
private static java.util.HashMap	providers
private static java.lang.String	SERVICES

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Service() Private constructor to keep from instantiating this class

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	isClassPoolable(java.lang.Class clazz) Provide a way to determine if a Class implements Poolable without requiring it to be in the classpath.
static java.util.Iterator	providers(java.lang.Class klass) Get all the providers for the specified services.
static java.util.Iterator	providers(java.lang.Class klass, java.lang.ClassLoader loader) Get all the providers for the specified services.
static java.util.Iterator	providers(java.lang.Class klass, java.lang.ClassLoader loader, org.apache.avalon.framework.logger.Logger logger) Get all the providers for the specified services.

Methods inherited from class java.lang.Object

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

Field Detail

POOLABLE

private static final java.lang.Class POOLABLE

SERVICES

private static final java.lang.String SERVICES

See Also:

Constant Field Values

providers

private static final java.util.HashMap providers

Constructor Detail

Service

private Service()

Private constructor to keep from instantiating this class

Method Detail

providers

public static java.util.Iterator providers(java.lang.Class klass,
                           java.lang.ClassLoader loader,
                           org.apache.avalon.framework.logger.Logger logger)

Get all the providers for the specified services.

Parameters:

klass - the interface Class

loader - the ClassLoader to be used.

logger - logger to use if any problems are encountered.

Returns:

an Iterator for the providers.

providers

public static java.util.Iterator providers(java.lang.Class klass,
                           java.lang.ClassLoader loader)

Get all the providers for the specified services.

Parameters:

klass - the interface Class

loader - the ClassLoader to be used.

Returns:

an Iterator for the providers.

providers

public static java.util.Iterator providers(java.lang.Class klass)

Get all the providers for the specified services.

Parameters:

klass - the interface Class

Returns:

an Iterator for the providers.

isClassPoolable

public static boolean isClassPoolable(java.lang.Class clazz)

Provide a way to determine if a Class implements Poolable without requiring it to be in the classpath.

Parameters:

clazz - the class to test

Returns:

true if Poolable is in the classpath and the class implements Poolable