dateatom.java

类似于Windows上的Excel

/*
 * MC2 -- j2me spreadsheet
 *
 * Copyright (c) 2004-2006 Michael Zemljanukha ([e-mail])
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

package com.wapindustrial.calc;

import ral.Real;

import java.util.*;

public class DateAtom extends LispObject  {

    public Real value;              // time in DHMS format
    public DateAtom( ) {            // get current Time
      value = new Real(); 
      Real tmpVal = new Real();
      value.time();
      tmpVal.date();
      value.add(tmpVal);      
    }          
    public DateAtom( Real value ) {
        this.value = new Real(value);
    }

    public DateAtom( int year, int month, int day, int hour, 
                     int min) { 
      value = new Real(year);
      value.mul(100);
      value.add(month);
      value.mul(100);
      value.add(day);
      value.mul(100);
      value.add(hour);
      value.mul(100);
      value.add(min);
      value.div(100);
    }
      
    public DateAtom( int year, int month, int day ) {
      this(year, month, day, 0, 0);
    }

    // to represent complex atoms as lists
    FunctorList toList() {
        return new FunctorList1(
                Bfunc.BFUNC.table[Bfunc.INDEX_DATE],          // move this from CanvasHandler to something like BFUNC
                new FloatAtom( value )
        );
    }
    
    public void toValueBuffer( StringBuffer sb, int format ) {
        dateToBuffer( sb, value, format );
    }

    public void toFormulaBuffer( StringBuffer sb ) {
        sb.append( '#' );
        dateToBuffer( sb, value, Cell.FORMAT_SHOWDATETIME );
        sb.append( '#' );
    }
    
//#ifdef JAVA_COMPILER
    public void toJavaBuffer( StringBuffer sb, int ident ) {
        addIdent( sb, ident );
        sb.append( "new DateAtom(" );
        sb.append( value.toString() );
        sb.append( "L) " );
    }
//#endif    
    
    public int typeNumber() {
        return TYPE_DATE;
    }

    public LispObject convertToType( int type ) throws EvaluateException {
        LispObject rez = this;
        switch( type ) {
            case TYPE_FLOAT:
                rez = new FloatAtom( value ); 
		((FloatAtom) rez).value.fromDHMS();  // convert from DHMS to hours
                break;
	    case TYPE_LONG:
		Real tmp= new Real( value );
		tmp.fromDHMS();              // convert from DHMS to hours
		tmp.sub(17268672);           // subtract 01.01.1970 00:00
		tmp.mul(3600000);            // convert from hours to millisec
		rez = new LongAtom( tmp.toLong() );
		break;
	    case TYPE_DATE:
		break;
            default:    // to STRING
                return super.convertToType( type );
        }
        return rez;
    }
    
    public static void dateToBuffer(StringBuffer sb, Real ll, int formats) {

        Real r1, r2, r100 = new Real(100);
        r1 = new Real( ll );
        r1.mul(100);
        r2 = new Real( r1 );
        r1.trunc();
        r2.assign(r1);
        r2.mod(r100);
        int min = r2.toInteger();
        r1.div(100);
        r1.trunc();
        r2.assign(r1);
        r2.mod(r100);
        int hour = r2.toInteger();
        r1.div(100);
        r1.trunc();
        r2.assign(r1);
        r2.mod(r100);
        int day = r2.toInteger();
        r1.div(100);
        r1.trunc();
        r2.assign(r1);
        r2.mod(r100);
        int month = r2.toInteger();
        r1.div(100);
        r1.trunc();
        int year = r1.toInteger();

        formats &= Cell.MASK_DATE;

        if ( formats == Cell.FORMAT_SHOWDATE || formats == Cell.FORMAT_SHOWDATETIME ) {
          if (year != 0) {
            if (day < 10) 
                sb.append('0');
            sb.append(Integer.toString(day));
            sb.append( '/' );
            if (month < 10) 
                sb.append('0');
            sb.append(Integer.toString(month));
            sb.append( '/' );
            if (year < 1000)
              sb.append('0');
            if (year < 100)
              sb.append('0');
            if (year < 10)
              sb.append('0');
            sb.append(Integer.toString(year)); 
          } else { // days only
            sb.append(month*100+day);
          }
        }
        if ( formats == Cell.FORMAT_SHOWDATETIME ) {
            sb.append( ' ' );
        }
        if ( formats == Cell.FORMAT_SHOWTIME || formats == Cell.FORMAT_SHOWDATETIME ) {
            if (hour < 10) {
                sb.append('0');
            }
            sb.append(Integer.toString(hour));
            sb.append(':');
            if (min < 10) {
                sb.append('0');
            }
            sb.append(Integer.toString(min));
        }
    }
    
}