src/java/org/apache/poi/hssf/record/formula/eval/NumericOperationEval.java

   1 /*
   2 * Licensed to the Apache Software Foundation (ASF) under one or more
   3 * contributor license agreements.  See the NOTICE file distributed with
   4 * this work for additional information regarding copyright ownership.
   5 * The ASF licenses this file to You under the Apache License, Version 2.0
   6 * (the "License"); you may not use this file except in compliance with
   7 * the License.  You may obtain a copy of the License at
   8 *
   9 *     http://www.apache.org/licenses/LICENSE-2.0
  10 *
  11 * Unless required by applicable law or agreed to in writing, software
  12 * distributed under the License is distributed on an "AS IS" BASIS,
  13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 * See the License for the specific language governing permissions and
  15 * limitations under the License.
  16 */
  17 /*
  18  * Created on May 14, 2005
  19  *
  20  */
  21 package org.apache.poi.hssf.record.formula.eval;
  22
  23 /**
  24  * @author Amol S. Deshmukh &lt; amolweb at ya hoo dot com &gt;
  25  *
  26  */
  27 public abstract class NumericOperationEval implements OperationEval {
  28
  29     protected abstract ValueEvalToNumericXlator getXlator();
  30
  31     protected ValueEval singleOperandEvaluate(Eval eval, int srcRow, short srcCol) {
  32         ValueEval retval;
  33         if (eval instanceof AreaEval) {
  34             AreaEval ae = (AreaEval) eval;
  35             if (ae.contains(srcRow, srcCol)) { // circular ref!
  36                 retval = ErrorEval.CIRCULAR_REF_ERROR;
  37             }
  38             else if (ae.isRow()) {
  39                 if (ae.containsColumn(srcCol)) {
  40                     ValueEval ve = ae.getValueAt(ae.getFirstRow(), srcCol);
  41                     ve = getXlator().attemptXlateToNumeric(ve);
  42                     retval = getXlator().attemptXlateToNumeric(ve);
  43                 }
  44                 else {
  45                     retval = ErrorEval.VALUE_INVALID;
  46                 }
  47             }
  48             else if (ae.isColumn()) {
  49                 if (ae.containsRow(srcRow)) {
  50                     ValueEval ve = ae.getValueAt(srcRow, ae.getFirstColumn());
  51                     retval = getXlator().attemptXlateToNumeric(ve);
  52                 }
  53                 else {
  54                     retval = ErrorEval.VALUE_INVALID;
  55                 }
  56             }
  57             else {
  58                 retval = ErrorEval.VALUE_INVALID;
  59             }
  60         }
  61         else {
  62             retval = getXlator().attemptXlateToNumeric((ValueEval) eval);
  63         }
  64         return retval;
  65     }
  66 }