| /************************************************************** |
| * |
| * 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 com.sun.star.report; |
| |
| /** |
| * Functions are statefull computation components. |
| * |
| * Functions are allowed to have a state, but are considered |
| * immutable (the same is true for expressions). Functions are |
| * allowed to update their state on every call to 'advance', which |
| * signals, that the cursor has been moved. |
| * |
| * Functions have no way to 'reset' their state, if a reset is needed, |
| * the report engine is urged to query a new instance from the ReportAddin. |
| */ |
| public interface ReportFunction extends ReportExpression |
| { |
| |
| public ReportFunction advance(DataRow row); |
| } |
