/* * 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. */ /* * Created on May 14, 2005 * */ namespace HH.WMS.Utils.NPOI.SS.Formula.Eval { /** * @author Amol S. Deshmukh < amolweb at ya hoo dot com > * */ public abstract class StringOperationEval : OperationEval { /** * Returns an is StringValueEval or ErrorEval or BlankEval * * @param eval * @param srcRow * @param srcCol */ protected ValueEval SingleOperandEvaluate(Eval eval, int srcRow, short srcCol) { ValueEval retval; if (eval is AreaEval) { AreaEval ae = (AreaEval)eval; if (ae.Contains(srcRow, srcCol)) { // circular ref! retval = ErrorEval.CIRCULAR_REF_ERROR; } else if (ae.IsRow) { if (ae.ContainsColumn(srcCol)) { ValueEval ve = ae.GetValue(ae.FirstRow, srcCol); retval = InternalResolveEval(eval); } else { retval = ErrorEval.NAME_INVALID; } } else if (ae.IsColumn) { if (ae.ContainsRow(srcRow)) { ValueEval ve = ae.GetValue(srcRow, ae.FirstColumn); retval = InternalResolveEval(eval); } else { retval = ErrorEval.NAME_INVALID; } } else { retval = ErrorEval.NAME_INVALID; } } else { retval = InternalResolveEval(eval); } return retval; } private ValueEval InternalResolveEval(Eval eval) { ValueEval retval; if (eval is StringValueEval) { retval = (StringValueEval)eval; } else if (eval is RefEval) { RefEval re = (RefEval)eval; ValueEval tve = re.InnerValueEval; if (tve is StringValueEval || tve is BlankEval) { retval = tve; } else { retval = ErrorEval.NAME_INVALID; } } else if (eval is BlankEval) { retval = (BlankEval)eval; } else { retval = ErrorEval.NAME_INVALID; } return retval; } public abstract Eval Evaluate(Eval[] evals, int srcCellRow, short srcCellCol); public abstract int NumberOfOperands { get; } } }