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54   
55   package org.apache.poi.hssf.record.formula;
56   
57   import org.apache.poi.util.LittleEndian;
58   
59   /**
60    * Number
61    * Stores a floating point value in a formula
62    * value stored in a 8 byte field using IEEE notation
63    * @author  Avik Sengupta
64    */
65   
66   public class NumberPtg
67       extends Ptg
68   {
69       public final static int  SIZE = 9;
70       public final static byte sid  = 0x1f;
71       private double            field_1_value;
72   
73           
74       /** Create a NumberPtg from a byte array read from disk */
75       public NumberPtg(byte [] data, int offset)
76       {
77           setValue(LittleEndian.getDouble(data, offset + 1));
78       }
79       
80       /** Create a NumberPtg from a string representation of  the number
81        *  Number format is not checked, it is expected to be validated in the parser
82        *   that calls this method. 
83        *  @param value : String representation of a floating point number
84        */
85       protected NumberPtg(String value) {
86           setValue(Double.parseDouble(value));
87       }
88       
89       
90       public void setValue(double value)
91       {
92           field_1_value = value;
93       }
94       
95       
96       public double getValue()
97       {
98           return field_1_value;
99       }
100  
101      public void writeBytes(byte [] array, int offset)
102      {
103          array[ offset + 0 ] = sid;
104          LittleEndian.putDouble(array, offset + 1, getValue());
105      }
106  
107      public int getSize()
108      {
109          return SIZE;
110      }
111  
112      public String toFormulaString()
113      {
114          return "" + getValue();
115      }
116         
117  }
118  
119