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/*
* Permission to copy, display and distribute the Service Component Architecture Specification and/or
* portions thereof, without modification, in any medium without fee or royalty is hereby granted, provided
* that you include the following on ALL copies of the Service Component Architecture Specification, or
* portions thereof, that you make:
* 1. A link or URL to the Service Component Architecture Specification at this location:
* http://www.osoa.org/display/Main/Service+Component+Architecture+Specifications
* 2. The full text of the copyright notice as shown in the Service Component Architecture Specification.
* BEA, Cape Clear, IBM, Interface21, IONA, Oracle, Primeton, Progress Software, Red Hat, Rogue Wave,
* SAP, Siemens, Software AG., Sun, Sybase, TIBCO (collectively, the "Authors") agree to grant you a
* royalty-free license, under reasonable, non-discriminatory terms and conditions to patents that they deem
* necessary to implement the Service Component Architecture Specification.
* THE Service Component Architecture SPECIFICATION IS PROVIDED "AS IS," AND THE
* AUTHORS MAKE NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,
* REGARDING THIS SPECIFICATION AND THE IMPLEMENTATION OF ITS CONTENTS,
* INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, NON-INFRINGEMENT OR TITLE.
* THE AUTHORS WILL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL
* OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATING TO ANY USE OR
* DISTRIBUTION OF THE Service Components Architecture SPECIFICATION.
* The name and trademarks of the Authors may NOT be used in any manner, including advertising or
* publicity pertaining to the Service Component Architecture Specification or its contents without specific,
*/
package org.osoa.sca;
/**
* Interface providing programmatic access to a component's SCA context as an alternative to injection.
* It provides access to reference and property values for the component and provides a mechanism for
* obtaining a reference to a service that can be passed to other components.
* <p/>
* SCA components obtain an instance of this interface through injection. Non-SCA client code may also
* obtain an instance through runtime-specific mechanisms.
*
* @version $Rev$ $Date$
*/
public interface ComponentContext {
/**
* Returns the absolute URI of the component within the SCA Domain.
*
* @return the absolute URI of the component
*/
String getURI();
/**
* Cast a type-safe reference to a CallableReference.
* Converts a type-safe reference to an equivalent CallableReference; if the target refers to a service
* then a ServiceReference will be returned, if the target refers to a callback then a CallableReference
* will be returned.
*
* @param target a reference proxy provided by the SCA runtime
* @param <B> the Java type of the business interface for the reference
* @param <R> the type of reference to be returned
* @return a CallableReference equivalent for the proxy
* @throws IllegalArgumentException if the supplied instance is not a reference supplied by the SCA runtime
*/
<B, R extends CallableReference<B>> R cast(B target) throws IllegalArgumentException;
/**
* Returns a proxy for a reference defined by this component.
*
* @param businessInterface the interface that will be used to invoke the service
* @param referenceName the name of the reference
* @param <B> the Java type of the business interface for the reference
* @return an object that implements the business interface
*/
<B> B getService(Class<B> businessInterface, String referenceName);
/**
* Returns a ServiceReference for a reference defined by this component.
*
* @param businessInterface the interface that will be used to invoke the service
* @param referenceName the name of the reference
* @param <B> the Java type of the business interface for the reference
* @return a ServiceReference for the designated reference
*/
<B> ServiceReference<B> getServiceReference(Class<B> businessInterface, String referenceName);
/**
* Returns the value of an SCA property defined by this component.
*
* @param type the Java type to be returned for the property
* @param propertyName the name of the property whose value should be returned
* @param <B> the Java type of the property
* @return the property value
*/
<B> B getProperty(Class<B> type, String propertyName);
/**
* Returns a ServiceReference that can be used to invoke this component over the default service.
*
* @param businessInterface the interface that will be used to invoke the service
* @param <B> the Java type of the business interface for the reference
* @return a ServiceReference that will invoke this component
*/
<B> ServiceReference<B> createSelfReference(Class<B> businessInterface);
/**
* Returns a ServiceReference that can be used to invoke this component over the designated service.
*
* @param businessInterface the interface that will be used to invoke the service
* @param serviceName the name of the service to invoke
* @param <B> the Java type of the business interface for the reference
* @return a ServiceReference that will invoke this component
*/
<B> ServiceReference<B> createSelfReference(Class<B> businessInterface, String serviceName);
/**
* Returns the context for the current SCA service request, or null if there is no current request
* or if the context is unavailable.
*
* @return the SCA request context; may be null
*/
RequestContext getRequestContext();
}
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