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/* ====================================================================
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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
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Unless required by applicable law or agreed to in writing, software
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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 java.util.function.BiFunction;
/**
* @author Robert Hulbert
* Common Interface for any excel built-in function that has implemented array formula functionality.
*/
public interface ArrayFunction {
/**
* @param args the evaluated function arguments. Empty values are represented with
* {@link BlankEval} or {@link MissingArgEval}, never null.
* @param srcRowIndex row index of the cell containing the formula under evaluation
* @param srcColumnIndex column index of the cell containing the formula under evaluation
* @return The evaluated result, possibly an {@link ErrorEval}, never null.
* Note - Excel uses the error code #NUM! instead of IEEE NaN, so when
* numeric functions evaluate to {@link Double#NaN} be sure to translate the result to {@link
* ErrorEval#NUM_ERROR}.
*/
ValueEval evaluateArray(ValueEval[] args, int srcRowIndex, int srcColumnIndex);
/**
* Evaluate an array function with two arguments.
*
* @param arg0 the first function argument. Empty values are represented with
* {@link BlankEval} or {@link MissingArgEval}, never null
* @param arg1 the first function argument. Empty values are represented with
* @link BlankEval} or {@link MissingArgEval}, never null
*
* @param srcRowIndex row index of the cell containing the formula under evaluation
* @param srcColumnIndex column index of the cell containing the formula under evaluation
* @return The evaluated result, possibly an {@link ErrorEval}, never null.
* Note - Excel uses the error code #NUM! instead of IEEE NaN, so when
* numeric functions evaluate to {@link Double#NaN} be sure to translate the result to {@link
* ErrorEval#NUM_ERROR}.
*/
default ValueEval evaluateTwoArrayArgs(ValueEval arg0, ValueEval arg1, int srcRowIndex, int srcColumnIndex,
BiFunction evalFunc) {
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 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();
} catch (RuntimeException e) {
if(e.getMessage().startsWith("Don't know how to evaluate name")){
vA = ErrorEval.NAME_INVALID;
} else {
throw e;
}
}
ValueEval vB;
try {
vB = OperandResolver.getSingleValue(arg1, a2FirstRow + i, a2FirstCol + j);
} catch (FormulaParseException e) {
vB = ErrorEval.NAME_INVALID;
} catch (EvaluationException e) {
vB = e.getErrorEval();
} catch (RuntimeException e) {
if(e.getMessage().startsWith("Don't know how to evaluate name")){
vB = ErrorEval.NAME_INVALID;
} else {
throw e;
}
}
if(vA instanceof ErrorEval){
vals[idx++] = vA;
} else if (vB instanceof ErrorEval) {
vals[idx++] = vB;
} else {
vals[idx++] = evalFunc.apply(vA, vB);
}
}
}
if (vals.length == 1) {
return vals[0];
}
return new CacheAreaEval(srcRowIndex, srcColumnIndex, srcRowIndex + height - 1, srcColumnIndex + width - 1, vals);
}
default ValueEval evaluateOneArrayArg(ValueEval arg0, int srcRowIndex, int srcColumnIndex,
java.util.function.Function evalFunc){
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;
}
w2 = 1;
h2 = 1;
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();
} catch (RuntimeException e) {
if(e.getMessage().startsWith("Don't know how to evaluate name")){
vA = ErrorEval.NAME_INVALID;
} else {
throw e;
}
}
vals[idx++] = evalFunc.apply(vA);
}
}
if (vals.length == 1) {
return vals[0];
}
return new CacheAreaEval(srcRowIndex, srcColumnIndex, srcRowIndex + height - 1, srcColumnIndex + width - 1, vals);
}
}
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