org.globus.wsrf.impl
Class SimpleTopicExpressionEvaluator

java.lang.Object
  org.globus.wsrf.impl.SimpleTopicExpressionEvaluator

All Implemented Interfaces:

TopicExpressionEvaluator

public class SimpleTopicExpressionEvaluator

extends java.lang.Object

implements TopicExpressionEvaluator

Topic expression evalutor for the simple topic dialect.

See Also:

TopicExpressionEvaluator

Field Summary

private static java.lang.String[]	dialects
private static org.globus.util.I18n	i18n
(package private) static org.apache.commons.logging.Log	logger

Constructor Summary

SimpleTopicExpressionEvaluator()

Method Summary

java.util.List	getConcreteTopicPath(TopicExpressionType expression) Converts the expression from dialect specific form to a ordered list of QNames.
java.lang.String[]	getDialects() Gets the URIs for the dialects that this evaluator can handle
java.util.Collection	resolve(TopicExpressionType expression, TopicList topicList) Evaluates the expression over a TopicList and returns the result.
TopicExpressionType	toTopicExpression(java.util.List topicPath) Converts a topic path (list of QNames) to a dialect specific concrete topic expression.

Methods inherited from class java.lang.Object

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

Field Detail

logger

static org.apache.commons.logging.Log logger

i18n

private static org.globus.util.I18n i18n

dialects

private static java.lang.String[] dialects

Constructor Detail

SimpleTopicExpressionEvaluator

public SimpleTopicExpressionEvaluator()

Method Detail

resolve

public java.util.Collection resolve(TopicExpressionType expression,
                                    TopicList topicList)
                             throws UnsupportedTopicExpressionDialectException,
                                    TopicExpressionResolutionException,
                                    InvalidTopicExpressionException,
                                    TopicExpressionException

Description copied from interface: TopicExpressionEvaluator

Evaluates the expression over a TopicList and returns the result.

Specified by:

resolve in interface TopicExpressionEvaluator

Parameters:

expression - object passed by client representing the topic expression

topicList - topic list associated with the service/resource

Returns:

the result of the evaluation which depends on the expression.

Throws:

TopicExpressionException - if any other error occurs

InvalidTopicExpressionException - if the topic expression is invalid

UnsupportedTopicExpressionDialectException - if the topic expression dialect is not supported

TopicExpressionResolutionException - if the expression could not be evaluated

getDialects

public java.lang.String[] getDialects()

Description copied from interface: TopicExpressionEvaluator

Gets the URIs for the dialects that this evaluator can handle

Specified by:

getDialects in interface TopicExpressionEvaluator

Returns:

array of URIs supported by this evaluator

getConcreteTopicPath

public java.util.List getConcreteTopicPath(TopicExpressionType expression)
                                    throws UnsupportedTopicExpressionDialectException,
                                           InvalidTopicExpressionException,
                                           TopicExpressionException

Description copied from interface: TopicExpressionEvaluator

Converts the expression from dialect specific form to a ordered list of QNames. This method throws an exception if the expression does not evaluate to a concrete topic path.

Specified by:

getConcreteTopicPath in interface TopicExpressionEvaluator

Parameters:

expression - object passed by client representing the topic expression

Returns:

a list of QNames describing the concrete topic path

Throws:

UnsupportedTopicExpressionDialectException - if the topic expression dialect is not supported

TopicExpressionException - if any other error occurs

InvalidTopicExpressionException - if the topic expression is invalid

toTopicExpression

public TopicExpressionType toTopicExpression(java.util.List topicPath)
                                      throws InvalidTopicExpressionException,
                                             TopicExpressionException

Description copied from interface: TopicExpressionEvaluator

Converts a topic path (list of QNames) to a dialect specific concrete topic expression.

Specified by:

toTopicExpression in interface TopicExpressionEvaluator

Parameters:

topicPath - containing a list of QNames describing a concrete topic path

Returns:

dialect specific version of the topic path

Throws:

InvalidTopicExpressionException - if the conrete topic path is invalid

TopicExpressionException - if any other error occurs