| /************************************************************** |
| * |
| * 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; |
| |
| /** |
| * Expressions are simple computation components. |
| * |
| * Expressions are always assumed to be immutable. They are not allowed to |
| * change their state and it is not guaranteed, in which order they get called. |
| * If the expression has been called before, the last computed value will be |
| * available from the datarow. |
| * |
| * This construct allows us to write expressions in the form |
| * "Sum := Sum + Column". |
| * |
| * Multiple calls to getValue on the same expression instance must return the |
| * same value (assuming that the datarow passed in is the same). |
| */ |
| public interface ReportExpression |
| { |
| |
| void setParameters(Object[] parameters); |
| |
| Object getParameters(); |
| |
| Object getValue(DataRow row); |
| } |