118 lines
3.7 KiB
Java
118 lines
3.7 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.ss.formula;
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import java.util.HashSet;
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import java.util.Set;
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import org.apache.poi.hssf.record.formula.eval.BlankEval;
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import org.apache.poi.hssf.record.formula.eval.BoolEval;
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import org.apache.poi.hssf.record.formula.eval.ErrorEval;
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import org.apache.poi.hssf.record.formula.eval.NumberEval;
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import org.apache.poi.hssf.record.formula.eval.StringEval;
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import org.apache.poi.hssf.record.formula.eval.ValueEval;
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/**
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* Stores the parameters that identify the evaluation of one cell.<br/>
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*/
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final class CellCacheEntry {
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private ValueEval _value;
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private final Set _consumingCells;
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private CellLocation[] _usedCells;
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private boolean _isPlainValueCell;
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public CellCacheEntry() {
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_consumingCells = new HashSet();
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}
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public boolean updatePlainValue(ValueEval value) {
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boolean wasChanged = false;
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if (!_isPlainValueCell) {
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wasChanged = true;
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}
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if (!areValuesEqual(_value, value)) {
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wasChanged = true;
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}
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_isPlainValueCell = true;
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_value = value;
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_usedCells = null;
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return wasChanged;
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}
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private boolean areValuesEqual(ValueEval a, ValueEval b) {
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if (a == null) {
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return false;
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}
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Class cls = a.getClass();
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if (cls != b.getClass()) {
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// value type is changing
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return false;
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}
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if (a == BlankEval.INSTANCE) {
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return b == a;
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}
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if (cls == NumberEval.class) {
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return ((NumberEval)a).getNumberValue() == ((NumberEval)b).getNumberValue();
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}
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if (cls == StringEval.class) {
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return ((StringEval)a).getStringValue().equals(((StringEval)b).getStringValue());
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}
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if (cls == BoolEval.class) {
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return ((BoolEval)a).getBooleanValue() == ((BoolEval)b).getBooleanValue();
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}
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if (cls == ErrorEval.class) {
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return ((ErrorEval)a).getErrorCode() == ((ErrorEval)b).getErrorCode();
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}
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throw new IllegalStateException("Unexpected value class (" + cls.getName() + ")");
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}
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public void setFormulaResult(ValueEval value, CellLocation[] usedCells) {
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_isPlainValueCell = false;
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_value = value;
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_usedCells = usedCells;
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}
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public void addConsumingCell(CellLocation cellLoc) {
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_consumingCells.add(cellLoc);
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}
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public CellLocation[] getConsumingCells() {
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int nItems = _consumingCells.size();
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if (nItems < 1) {
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return CellLocation.EMPTY_ARRAY;
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}
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CellLocation[] result = new CellLocation[nItems];
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_consumingCells.toArray(result);
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return result;
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}
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public CellLocation[] getUsedCells() {
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return _usedCells;
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}
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public void clearConsumingCell(CellLocation fc) {
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if(!_consumingCells.remove(fc)) {
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throw new IllegalStateException("Cell '" + fc.formatAsString() + "' does not use this cell");
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}
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}
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public ValueEval getValue() {
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ValueEval result = _value;
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if (result == null) {
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if (_isPlainValueCell) {
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throw new IllegalStateException("Plain value cell should always have a value");
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}
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}
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return result;
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}
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} |