/*=============================================================================*
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*=============================================================================*/
package org.apache.ws.notification.topics.expression.impl;
import org.apache.ws.notification.topics.Topic;
import org.apache.ws.notification.topics.TopicSpace;
import org.apache.ws.notification.topics.TopicSpaceSet;
import org.apache.ws.notification.topics.expression.InvalidTopicExpressionException;
import org.apache.ws.notification.topics.expression.TopicExpression;
import org.apache.ws.notification.topics.expression.TopicExpressionEvaluator;
import org.apache.ws.notification.topics.expression.TopicExpressionException;
import org.apache.ws.notification.topics.expression.TopicExpressionResolutionException;
import org.apache.ws.notification.topics.expression.TopicPathDialectUnknownException;
import org.apache.ws.notification.topics.expression.impl.AbstractTopicExpressionEvaluator;
import org.apache.ws.notification.topics.v2004_06.TopicsConstants;
import org.apache.ws.util.xml.NamespaceContext;
import javax.xml.namespace.QName;
import java.util.ArrayList;
import java.util.List;
/**
* Topic expression evalutor for the WS-Topics "Simple" topic dialect.
*
* @see org.apache.ws.notification.topics.expression.TopicExpressionEvaluator
*
* @author Ian Springer (ian DOT springer AT hp DOT com)
*/
public class SimpleTopicExpressionEvaluator
extends AbstractTopicExpressionEvaluator
{
//private static final Log LOG = LogFactory.getLog(SimpleTopicExpressionEvaluator.class.getName());
private static final String[] SUPPORTED_DIALECTS =
{
TopicsConstants.TOPIC_EXPR_DIALECT_SIMPLE
};
/**
* DOCUMENT_ME
*
* @return DOCUMENT_ME
*/
public String[] getDialects( )
{
return SUPPORTED_DIALECTS;
}
/**
* DOCUMENT_ME
*
* @param topicSpaceSet DOCUMENT_ME
* @param topicExpr DOCUMENT_ME
*
* @return DOCUMENT_ME
*
* @throws TopicPathDialectUnknownException DOCUMENT_ME
* @throws TopicExpressionResolutionException DOCUMENT_ME
* @throws InvalidTopicExpressionException DOCUMENT_ME
* @throws TopicExpressionException DOCUMENT_ME
*/
public Topic[] evaluate( TopicSpaceSet topicSpaceSet,
TopicExpression topicExpr )
throws TopicPathDialectUnknownException,
TopicExpressionResolutionException,
InvalidTopicExpressionException,
TopicExpressionException
{
String expr = getContent( topicExpr );
NamespaceContext nsContext = getNamespaceContext( topicExpr );
QName topicPath = toQName( expr, nsContext );
List matchedTopics = evaluateTopicPath( topicSpaceSet, topicPath );
return (Topic[]) matchedTopics.toArray( new Topic[0] );
}
private List evaluateTopicPath( TopicSpaceSet topicSpaceSet,
QName topicPath )
throws TopicExpressionResolutionException,
InvalidTopicExpressionException
{
List matchedTopics = new ArrayList( );
TopicSpace topicSpace = getTopicSpace( topicSpaceSet, topicPath );
if ( ( topicPath.getLocalPart( ).indexOf( "/" ) != -1 )
|| ( topicPath.getLocalPart( ).indexOf( "*" ) != -1 )
|| ( topicPath.getLocalPart( ).indexOf( "|" ) != -1 )
|| ( topicPath.getLocalPart( ).indexOf( "." ) != -1 ) )
{
throw new InvalidTopicExpressionException( "Topic path '" + topicPath
+ "' contains one or more illegal characters ('/', '*', '|' or '.')." );
}
String name = topicPath.getLocalPart( );
Topic topic = topicSpace.getTopic( name );
if ( topic != null )
{
matchedTopics.add( topic );
}
return matchedTopics;
}
}