| /* ==================================================================== |
| 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.functions; |
| |
| import org.apache.poi.ss.formula.CacheAreaEval; |
| import org.apache.poi.ss.formula.FormulaParseException; |
| import org.apache.poi.ss.formula.eval.*; |
| import org.apache.poi.ss.formula.ptg.Ptg; |
| import org.apache.poi.ss.formula.ptg.RefPtg; |
| |
| import java.util.function.BiFunction; |
| |
| /** |
| * Implementation for the Excel function IF |
| * <p> |
| * Note that Excel is a bit picky about the arguments to this function, |
| * when serialised into {@link Ptg}s in a HSSF file. While most cases are |
| * pretty chilled about the R vs V state of {@link RefPtg} arguments, |
| * for IF special care is needed to avoid Excel showing #VALUE. |
| * See bug numbers #55324 and #55747 for the full details on this. |
| * TODO Fix this... |
| */ |
| public final class IfFunc extends Var2or3ArgFunction implements ArrayFunction { |
| |
| @Override |
| public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1) { |
| boolean b; |
| try { |
| b = evaluateFirstArg(arg0, srcRowIndex, srcColumnIndex); |
| } catch (EvaluationException e) { |
| return e.getErrorEval(); |
| } |
| if (b) { |
| if (arg1 == MissingArgEval.instance) { |
| return BlankEval.instance; |
| } |
| return arg1; |
| } |
| return BoolEval.FALSE; |
| } |
| |
| @Override |
| public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1, |
| ValueEval arg2) { |
| boolean b; |
| try { |
| b = evaluateFirstArg(arg0, srcRowIndex, srcColumnIndex); |
| } catch (EvaluationException e) { |
| return e.getErrorEval(); |
| } |
| if (b) { |
| if (arg1 == MissingArgEval.instance) { |
| return BlankEval.instance; |
| } |
| return arg1; |
| } |
| if (arg2 == MissingArgEval.instance) { |
| return BlankEval.instance; |
| } |
| return arg2; |
| } |
| |
| public static boolean evaluateFirstArg(ValueEval arg, int srcCellRow, int srcCellCol) |
| throws EvaluationException { |
| ValueEval ve = OperandResolver.getSingleValue(arg, srcCellRow, srcCellCol); |
| Boolean b = OperandResolver.coerceValueToBoolean(ve, false); |
| if (b == null) { |
| return false; |
| } |
| return b.booleanValue(); |
| } |
| |
| |
| @Override |
| public ValueEval evaluateArray(ValueEval[] args, int srcRowIndex, int srcColumnIndex) { |
| if (args.length < 2 || args.length > 3) { |
| return ErrorEval.VALUE_INVALID; |
| } |
| |
| ValueEval arg0 = args[0]; |
| ValueEval arg1 = args[1]; |
| ValueEval arg2 = args.length == 2 ? BoolEval.FALSE : args[2]; |
| return evaluateArrayArgs(arg0, arg1, arg2, srcRowIndex, srcColumnIndex); |
| } |
| |
| ValueEval evaluateArrayArgs(ValueEval arg0, ValueEval arg1, ValueEval arg2, int srcRowIndex, int srcColumnIndex) { |
| int w1, w2, h1, h2; |
| int a1FirstCol = 0, a1FirstRow = 0; |
| if (arg0 instanceof AreaEval) { |
| AreaEval ae = (AreaEval)arg0; |
| w1 = ae.getWidth(); |
| h1 = ae.getHeight(); |
| a1FirstCol = ae.getFirstColumn(); |
| a1FirstRow = ae.getFirstRow(); |
| } else if (arg0 instanceof RefEval){ |
| RefEval ref = (RefEval)arg0; |
| w1 = 1; |
| h1 = 1; |
| a1FirstCol = ref.getColumn(); |
| a1FirstRow = ref.getRow(); |
| } else { |
| w1 = 1; |
| h1 = 1; |
| } |
| int a2FirstCol = 0, a2FirstRow = 0; |
| if (arg1 instanceof AreaEval) { |
| AreaEval ae = (AreaEval)arg1; |
| w2 = ae.getWidth(); |
| h2 = ae.getHeight(); |
| a2FirstCol = ae.getFirstColumn(); |
| a2FirstRow = ae.getFirstRow(); |
| } else if (arg1 instanceof RefEval){ |
| RefEval ref = (RefEval)arg1; |
| w2 = 1; |
| h2 = 1; |
| a2FirstCol = ref.getColumn(); |
| a2FirstRow = ref.getRow(); |
| } else { |
| w2 = 1; |
| h2 = 1; |
| } |
| |
| int a3FirstCol = 0, a3FirstRow = 0; |
| if (arg2 instanceof AreaEval) { |
| AreaEval ae = (AreaEval)arg2; |
| a3FirstCol = ae.getFirstColumn(); |
| a3FirstRow = ae.getFirstRow(); |
| } else if (arg2 instanceof RefEval){ |
| RefEval ref = (RefEval)arg2; |
| a3FirstCol = ref.getColumn(); |
| a3FirstRow = ref.getRow(); |
| } |
| |
| int width = Math.max(w1, w2); |
| int height = Math.max(h1, h2); |
| |
| ValueEval[] vals = new ValueEval[height * width]; |
| |
| int idx = 0; |
| for(int i = 0; i < height; i++){ |
| for(int j = 0; j < width; j++){ |
| ValueEval vA; |
| try { |
| vA = OperandResolver.getSingleValue(arg0, a1FirstRow + i, a1FirstCol + j); |
| } catch (FormulaParseException e) { |
| vA = ErrorEval.NAME_INVALID; |
| } catch (EvaluationException e) { |
| vA = e.getErrorEval(); |
| } |
| ValueEval vB; |
| try { |
| vB = OperandResolver.getSingleValue(arg1, a2FirstRow + i, a2FirstCol + j); |
| } catch (FormulaParseException e) { |
| vB = ErrorEval.NAME_INVALID; |
| } catch (EvaluationException e) { |
| vB = e.getErrorEval(); |
| } |
| |
| ValueEval vC; |
| try { |
| vC = OperandResolver.getSingleValue(arg2, a3FirstRow + i, a3FirstCol + j); |
| } catch (FormulaParseException e) { |
| vC = ErrorEval.NAME_INVALID; |
| } catch (EvaluationException e) { |
| vC = e.getErrorEval(); |
| } |
| |
| if(vA instanceof ErrorEval){ |
| vals[idx++] = vA; |
| } else { |
| Boolean b; |
| try { |
| b = OperandResolver.coerceValueToBoolean(vA, false); |
| vals[idx++] = b != null && b ? vB : vC; |
| } catch (EvaluationException e) { |
| vals[idx++] = e.getErrorEval(); |
| } |
| } |
| |
| } |
| } |
| |
| if (vals.length == 1) { |
| return vals[0]; |
| } |
| |
| return new CacheAreaEval(srcRowIndex, srcColumnIndex, srcRowIndex + height - 1, srcColumnIndex + width - 1, vals); |
| } |
| |
| } |