51 lines
1.8 KiB
Java
51 lines
1.8 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hssf.record.formula;
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/**
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* defines a Ptg that is an operation instead of an operand
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* @author andy
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*/
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public abstract class OperationPtg extends Ptg {
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public final static int TYPE_UNARY = 0;
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public final static int TYPE_BINARY = 1;
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public final static int TYPE_FUNCTION = 2;
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/**
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* returns a string representation of the operations
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* the length of the input array should equal the number returned by
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* @see #getNumberOfOperands
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*
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*/
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public abstract String toFormulaString(String[] operands);
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/**
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* The number of operands expected by the operations
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*/
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public abstract int getNumberOfOperands();
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public byte getDefaultOperandClass() {
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return Ptg.CLASS_VALUE;
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}
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public final int getType() {
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// TODO remove "int getType();" from Eval hierarchy
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throw new RuntimeException("remove this method");
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}
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}
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