numberptg.java

Office格式转换代码

/* ====================================================================
 * The Apache Software License, Version 1.1
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 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 */

package org.apache.poi.hssf.record.formula;

import org.apache.poi.util.LittleEndian;
import org.apache.poi.hssf.model.Workbook;
/**
 * Number
 * Stores a floating point value in a formula
 * value stored in a 8 byte field using IEEE notation
 * @author  Avik Sengupta
 * @author Jason Height (jheight at chariot dot net dot au)
 */

public class NumberPtg
    extends Ptg
{
    public final static int  SIZE = 9;
    public final static byte sid  = 0x1f;
    private double            field_1_value;

    private NumberPtg() {
      //Required for clone methods
    }
        
    /** Create a NumberPtg from a byte array read from disk */
    public NumberPtg(byte [] data, int offset)
    {
        setValue(LittleEndian.getDouble(data, offset + 1));
    }
    
    /** Create a NumberPtg from a string representation of  the number
     *  Number format is not checked, it is expected to be validated in the parser
     *   that calls this method. 
     *  @param value : String representation of a floating point number
     */
    public NumberPtg(String value) {
        setValue(Double.parseDouble(value));
    }
    
    
    public void setValue(double value)
    {
        field_1_value = value;
    }
    
    
    public double getValue()
    {
        return field_1_value;
    }

    public void writeBytes(byte [] array, int offset)
    {
        array[ offset + 0 ] = sid;
        LittleEndian.putDouble(array, offset + 1, getValue());
    }

    public int getSize()
    {
        return SIZE;
    }

    public String toFormulaString(Workbook book)
    {
        return "" + getValue();
    }
       public byte getDefaultOperandClass() {return Ptg.CLASS_VALUE;}

    public Object clone() {
      NumberPtg ptg = new NumberPtg();
      ptg.field_1_value = field_1_value;
      return ptg;
    }
}