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- /* ====================================================================
- 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.TwoDEval;
- import org.apache.poi.ss.formula.eval.BlankEval;
- import org.apache.poi.ss.formula.eval.BoolEval;
- import org.apache.poi.ss.formula.eval.ErrorEval;
- import org.apache.poi.ss.formula.eval.EvaluationException;
- import org.apache.poi.ss.formula.eval.MissingArgEval;
- import org.apache.poi.ss.formula.eval.OperandResolver;
- import org.apache.poi.ss.formula.eval.RefEval;
- import org.apache.poi.ss.formula.eval.ValueEval;
-
- /**
- * Here are the general rules concerning Boolean functions:
- * <ol>
- * <li> Blanks are ignored (not either true or false) </li>
- * <li> Strings are ignored if part of an area ref or cell ref, otherwise they must be 'true' or 'false'</li>
- * <li> Numbers: 0 is false. Any other number is TRUE </li>
- * <li> Areas: *all* cells in area are evaluated according to the above rules</li>
- * </ol>
- */
- public abstract class BooleanFunction implements Function,ArrayFunction {
-
- public final ValueEval evaluate(ValueEval[] args, int srcRow, int srcCol) {
- if (args.length < 1) {
- return ErrorEval.VALUE_INVALID;
- }
- boolean boolResult;
- try {
- boolResult = calculate(args);
- } catch (EvaluationException e) {
- return e.getErrorEval();
- }
- return BoolEval.valueOf(boolResult);
- }
-
- private boolean calculate(ValueEval[] args) throws EvaluationException {
-
- boolean result = getInitialResultValue();
- boolean atLeastOneNonBlank = false;
-
- /*
- * Note: no short-circuit boolean loop exit because any ErrorEvals will override the result
- */
- for (final ValueEval arg : args) {
- Boolean tempVe;
- if (arg instanceof TwoDEval) {
- TwoDEval ae = (TwoDEval) arg;
- int height = ae.getHeight();
- int width = ae.getWidth();
- for (int rrIx=0; rrIx<height; rrIx++) {
- for (int rcIx=0; rcIx<width; rcIx++) {
- ValueEval ve = ae.getValue(rrIx, rcIx);
- tempVe = OperandResolver.coerceValueToBoolean(ve, true);
- if (tempVe != null) {
- result = partialEvaluate(result, tempVe);
- atLeastOneNonBlank = true;
- }
- }
- }
- continue;
- }
- if (arg instanceof RefEval) {
- RefEval re = (RefEval) arg;
- final int firstSheetIndex = re.getFirstSheetIndex();
- final int lastSheetIndex = re.getLastSheetIndex();
- for (int sIx = firstSheetIndex; sIx <= lastSheetIndex; sIx++) {
- ValueEval ve = re.getInnerValueEval(sIx);
- tempVe = OperandResolver.coerceValueToBoolean(ve, true);
- if (tempVe != null) {
- result = partialEvaluate(result, tempVe);
- atLeastOneNonBlank = true;
- }
- }
- continue;
- }
-
- if (arg == MissingArgEval.instance || arg == BlankEval.instance) {
- tempVe = false; // missing parameters are treated as FALSE
- } else {
- tempVe = OperandResolver.coerceValueToBoolean(arg, false);
- }
-
- if (tempVe != null) {
- result = partialEvaluate(result, tempVe);
- atLeastOneNonBlank = true;
- }
- }
-
- if (!atLeastOneNonBlank) {
- throw new EvaluationException(ErrorEval.VALUE_INVALID);
- }
- return result;
- }
-
-
- protected abstract boolean getInitialResultValue();
- protected abstract boolean partialEvaluate(boolean cumulativeResult, boolean currentValue);
-
-
- public static final Function AND = new BooleanFunction() {
- protected boolean getInitialResultValue() {
- return true;
- }
- protected boolean partialEvaluate(boolean cumulativeResult, boolean currentValue) {
- return cumulativeResult && currentValue;
- }
- };
- public static final Function OR = new BooleanFunction() {
- protected boolean getInitialResultValue() {
- return false;
- }
- protected boolean partialEvaluate(boolean cumulativeResult, boolean currentValue) {
- return cumulativeResult || currentValue;
- }
- };
-
- public static final Function FALSE = BooleanFunction::evaluateFalse;
-
- public static final Function TRUE = BooleanFunction::evaluateTrue;
-
- public static final Function NOT = BooleanFunction::evaluateNot;
-
- @Override
- public ValueEval evaluateArray(ValueEval[] args, int srcRowIndex, int srcColumnIndex) {
- return evaluate(args, srcRowIndex, srcColumnIndex);
- }
-
- private static ValueEval evaluateFalse(ValueEval[] args, int srcRowIndex, int srcColumnIndex) {
- return args.length != 0 ? ErrorEval.VALUE_INVALID : BoolEval.FALSE;
- }
-
- private static ValueEval evaluateTrue(ValueEval[] args, int srcRowIndex, int srcColumnIndex) {
- return args.length != 0 ? ErrorEval.VALUE_INVALID : BoolEval.TRUE;
- }
-
- private static ValueEval evaluateNot(ValueEval[] args, int srcRowIndex, int srcColumnIndex) {
- if (args.length != 1) {
- return ErrorEval.VALUE_INVALID;
- }
- java.util.function.Function<ValueEval, ValueEval> notInner = (va) -> {
- try {
- ValueEval ve = OperandResolver.getSingleValue(va, srcRowIndex, srcColumnIndex);
- Boolean b = OperandResolver.coerceValueToBoolean(ve, false);
- boolean boolArgVal = b != null && b;
- return BoolEval.valueOf(!boolArgVal);
- } catch (EvaluationException e) {
- return e.getErrorEval();
- }
- };
-
- return ArrayFunction._evaluateOneArrayArg(args[0], srcRowIndex, srcColumnIndex, notInner);
- }
- }
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