taverna-reference-api/src/main/java/org/apache/taverna/reference/T2ReferenceType.java

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.taverna.reference;

/**
 * The T2Reference interface is used to identify several different kinds of
 * information, namely ReferenceSet, IdentifiedList and ErrorDocument. Because
 * the top level reference service needs to determine which sub-service to
 * delegate to when resolving references we carry this information in each
 * T2Reference in the form of one of these enumerated types.
 * 
 * @author Tom Oinn
 */
public enum T2ReferenceType {
	/**
	 * A reference to a ReferenceSet
	 */
	ReferenceSet,

	/**
	 * A reference to an IdentifiedList of other T2References
	 */
	IdentifiedList,

	/**
	 * A reference to an ErrorDocument
	 */
	ErrorDocument;
}