src/java/org/apache/poi/hssf/record/formula/functions/Degrees.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 6, 2005
  19  *
  20  */
  21 package org.apache.poi.hssf.record.formula.functions;
  22
  23 import org.apache.poi.hssf.record.formula.eval.BlankEval;
  24 import org.apache.poi.hssf.record.formula.eval.ErrorEval;
  25 import org.apache.poi.hssf.record.formula.eval.Eval;
  26 import org.apache.poi.hssf.record.formula.eval.NumberEval;
  27 import org.apache.poi.hssf.record.formula.eval.NumericValueEval;
  28 import org.apache.poi.hssf.record.formula.eval.ValueEval;
  29
  30 /**
  31  * @author Amol S. Deshmukh &lt; amolweb at ya hoo dot com &gt;
  32  *
  33  */
  34 public class Degrees extends NumericFunction {
  35
  36     public Eval evaluate(Eval[] operands, int srcRow, short srcCol) {
  37         double d = 0;
  38         ValueEval retval = null;
  39
  40         switch (operands.length) {
  41         default:
  42             retval = ErrorEval.VALUE_INVALID;
  43             break;
  44         case 1:
  45             ValueEval ve = singleOperandEvaluate(operands[0], srcRow, srcCol);
  46             if (ve instanceof NumericValueEval) {
  47                 NumericValueEval ne = (NumericValueEval) ve;
  48                 d = ne.getNumberValue();
  49             }
  50             else if (ve instanceof BlankEval) {
  51                 // do nothing
  52             }
  53             else {
  54                 retval = ErrorEval.NUM_ERROR;
  55             }
  56         }
  57
  58         if (retval == null) {
  59             d = Math.toDegrees(d);
  60             retval = (Double.isNaN(d)) ? (ValueEval) ErrorEval.VALUE_INVALID : new NumberEval(d);
  61         }
  62         return retval;
  63     }
  64
  65 }