1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski package com.sun.star.report; 24*b1cdbd2cSJim Jagielski 25*b1cdbd2cSJim Jagielski /** 26*b1cdbd2cSJim Jagielski * Functions are statefull computation components. 27*b1cdbd2cSJim Jagielski * 28*b1cdbd2cSJim Jagielski * Functions are allowed to have a state, but are considered 29*b1cdbd2cSJim Jagielski * immutable (the same is true for expressions). Functions are 30*b1cdbd2cSJim Jagielski * allowed to update their state on every call to 'advance', which 31*b1cdbd2cSJim Jagielski * signals, that the cursor has been moved. 32*b1cdbd2cSJim Jagielski * 33*b1cdbd2cSJim Jagielski * Functions have no way to 'reset' their state, if a reset is needed, 34*b1cdbd2cSJim Jagielski * the report engine is urged to query a new instance from the ReportAddin. 35*b1cdbd2cSJim Jagielski */ 36*b1cdbd2cSJim Jagielski public interface ReportFunction extends ReportExpression 37*b1cdbd2cSJim Jagielski { 38*b1cdbd2cSJim Jagielski advance(DataRow row)39*b1cdbd2cSJim Jagielski public ReportFunction advance(DataRow row); 40*b1cdbd2cSJim Jagielski } 41