| /* ==================================================================== |
| 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.poi.ss.formula.ptg; |
| |
| /** |
| * defines a Ptg that is an operation instead of an operand |
| * @author andy |
| */ |
| public abstract class OperationPtg extends Ptg { |
| public final static int TYPE_UNARY = 0; |
| public final static int TYPE_BINARY = 1; |
| public final static int TYPE_FUNCTION = 2; |
| |
| /** |
| * returns a string representation of the operations |
| * the length of the input array should equal the number returned by |
| * @see #getNumberOfOperands |
| * |
| */ |
| public abstract String toFormulaString(String[] operands); |
| |
| /** |
| * The number of operands expected by the operations |
| */ |
| public abstract int getNumberOfOperands(); |
| |
| public byte getDefaultOperandClass() { |
| return Ptg.CLASS_VALUE; |
| } |
| } |