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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;
-
- import java.util.HashMap;
- import java.util.Map;
-
- import org.apache.poi.hssf.record.formula.AbstractFunctionPtg;
- import org.apache.poi.hssf.record.formula.AddPtg;
- import org.apache.poi.hssf.record.formula.ConcatPtg;
- import org.apache.poi.hssf.record.formula.DividePtg;
- import org.apache.poi.hssf.record.formula.EqualPtg;
- import org.apache.poi.hssf.record.formula.GreaterEqualPtg;
- import org.apache.poi.hssf.record.formula.GreaterThanPtg;
- import org.apache.poi.hssf.record.formula.LessEqualPtg;
- import org.apache.poi.hssf.record.formula.LessThanPtg;
- import org.apache.poi.hssf.record.formula.MultiplyPtg;
- import org.apache.poi.hssf.record.formula.NotEqualPtg;
- import org.apache.poi.hssf.record.formula.OperationPtg;
- import org.apache.poi.hssf.record.formula.PercentPtg;
- import org.apache.poi.hssf.record.formula.PowerPtg;
- import org.apache.poi.hssf.record.formula.Ptg;
- import org.apache.poi.hssf.record.formula.RangePtg;
- import org.apache.poi.hssf.record.formula.SubtractPtg;
- import org.apache.poi.hssf.record.formula.UnaryMinusPtg;
- import org.apache.poi.hssf.record.formula.UnaryPlusPtg;
- import org.apache.poi.hssf.record.formula.eval.ConcatEval;
- import org.apache.poi.hssf.record.formula.eval.FunctionEval;
- import org.apache.poi.hssf.record.formula.eval.OperationEval;
- import org.apache.poi.hssf.record.formula.eval.PercentEval;
- import org.apache.poi.hssf.record.formula.eval.RangeEval;
- import org.apache.poi.hssf.record.formula.eval.RelationalOperationEval;
- import org.apache.poi.hssf.record.formula.eval.TwoOperandNumericOperation;
- import org.apache.poi.hssf.record.formula.eval.UnaryMinusEval;
- import org.apache.poi.hssf.record.formula.eval.UnaryPlusEval;
- import org.apache.poi.hssf.record.formula.eval.ValueEval;
- import org.apache.poi.hssf.record.formula.functions.Function;
-
- /**
- * This class creates <tt>OperationEval</tt> instances to help evaluate <tt>OperationPtg</tt>
- * formula tokens.
- *
- * @author Josh Micich
- */
- final class OperationEvaluatorFactory {
-
- private static final Map<Class<? extends Ptg>, OperationEval> _instancesByPtgClass = initialiseInstancesMap();
-
- private OperationEvaluatorFactory() {
- // no instances of this class
- }
-
- private static Map<Class<? extends Ptg>, OperationEval> initialiseInstancesMap() {
- Map<Class<? extends Ptg>, OperationEval> m = new HashMap<Class<? extends Ptg>, OperationEval>(32);
-
- put(m, 2, EqualPtg.class, RelationalOperationEval.EqualEval);
- put(m, 2, GreaterEqualPtg.class, RelationalOperationEval.GreaterEqualEval);
- put(m, 2, GreaterThanPtg.class, RelationalOperationEval.GreaterThanEval);
- put(m, 2, LessEqualPtg.class, RelationalOperationEval.LessEqualEval);
- put(m, 2, LessThanPtg.class, RelationalOperationEval.LessThanEval);
- put(m, 2, NotEqualPtg.class, RelationalOperationEval.NotEqualEval);
-
- put(m, 2, ConcatPtg.class, ConcatEval.instance);
- put(m, 2, AddPtg.class, TwoOperandNumericOperation.AddEval);
- put(m, 2, DividePtg.class, TwoOperandNumericOperation.DivideEval);
- put(m, 2, MultiplyPtg.class, TwoOperandNumericOperation.MultiplyEval);
- put(m, 1, PercentPtg.class, PercentEval.instance);
- put(m, 2, PowerPtg.class, TwoOperandNumericOperation.PowerEval);
- put(m, 2, SubtractPtg.class, TwoOperandNumericOperation.SubtractEval);
- put(m, 1, UnaryMinusPtg.class, UnaryMinusEval.instance);
- put(m, 1, UnaryPlusPtg.class, UnaryPlusEval.instance);
- put(m, 2, RangePtg.class, RangeEval.instance);
- return m;
- }
-
- private static void put(Map<Class<? extends Ptg>, OperationEval> m, int argCount,
- Class<? extends Ptg> ptgClass, Function instance) {
- m.put(ptgClass, new OperationFunctionEval(instance, argCount));
- }
-
- /**
- * Simple adapter from {@link OperationEval} to {@link Function}
- */
- private static final class OperationFunctionEval implements OperationEval {
-
- private final Function _function;
- private final int _numberOfOperands;
-
- public OperationFunctionEval(Function function, int argCount) {
- _function = function;
- _numberOfOperands = argCount;
- }
-
- public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) {
- return _function.evaluate(args, ec.getRowIndex(), (short) ec.getColumnIndex());
- }
-
- public int getNumberOfOperands() {
- return _numberOfOperands;
- }
- }
-
- /**
- * returns the OperationEval concrete impl instance corresponding
- * to the supplied operationPtg
- */
- public static OperationEval create(OperationPtg ptg) {
- if(ptg == null) {
- throw new IllegalArgumentException("ptg must not be null");
- }
- OperationEval result;
-
- Class<? extends OperationPtg> ptgClass = ptg.getClass();
-
- result = _instancesByPtgClass.get(ptgClass);
- if (result != null) {
- return result;
- }
-
- if (ptg instanceof AbstractFunctionPtg) {
- return new FunctionEval((AbstractFunctionPtg)ptg);
- }
- throw new RuntimeException("Unexpected operation ptg class (" + ptgClass.getName() + ")");
- }
- }
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