| /* |
| * 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.workflowmodel; |
| |
| /** |
| * A filtering input port is one capable of filtering events to only pass |
| * through data events at a certain depth. Other events are either ignored (in |
| * the case of finer granularity) or converted to completion events (for |
| * coarser). Where the filter depth and the port depth are distinct this port |
| * type will filter on the filter depth then drill into the data to get down to |
| * the port depth. Filter depth must always be equal to or greater than port |
| * depth. |
| * <p> |
| * This is used as the interface for Processor input ports. |
| * <p> |
| * A condition to use this type is that the stream of events for a given process |
| * ID must terminate with a top level (i.e. zero length index array) token. This |
| * can be accomplished by use of the crystalizer (as found on the output of a |
| * Processor instance) or some other mechanism but is required. Similarly it is |
| * assumed that all intermediate collections are emited in the correct sequence, |
| * if this is not the case the filtering may not function correctly. |
| * |
| * @author Tom Oinn |
| */ |
| public interface FilteringInputPort extends EventHandlingInputPort { |
| /** |
| * Set the depth at which to filter events. Events at a lower depth than |
| * this are ignored completely, those at exactly this depth are passed |
| * through intact and those above are converted to completion events. |
| * |
| * @param filterDepth |
| */ |
| int getFilterDepth(); |
| } |