Statistics
| Revision:

svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / date / DateFunction.java @ 44338

History | View | Annotate | Download (1.83 KB)

1 43987 jjdelcerro
package org.gvsig.expressionevaluator.impl.function.date;
2 43512 jjdelcerro
3 43987 jjdelcerro
import java.text.ParseException;
4
import java.text.SimpleDateFormat;
5
import java.util.Date;
6 43512 jjdelcerro
import org.apache.commons.lang3.Range;
7 44198 jjdelcerro
import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_DATE;
8 43521 jjdelcerro
import org.gvsig.expressionevaluator.Interpreter;
9 43512 jjdelcerro
import org.gvsig.expressionevaluator.spi.AbstractFunction;
10
11 43987 jjdelcerro
public class DateFunction extends AbstractFunction {
12 43512 jjdelcerro
13 43987 jjdelcerro
    public DateFunction() {
14 44198 jjdelcerro
        super("Date", FUNCTION_DATE,Range.between(1,2),
15 43987 jjdelcerro
            "Returns a date from the arguments",
16 44198 jjdelcerro
            FUNCTION_DATE+"({{date}}, format)",
17 43983 jjdelcerro
            new String[]{
18 43987 jjdelcerro
                "date - a string with a date",
19
                "format - Optional. Format to use to parse the date"
20 43983 jjdelcerro
            },
21 43987 jjdelcerro
            "Date"
22 43983 jjdelcerro
        );
23 43512 jjdelcerro
    }
24
25
    @Override
26 44009 jjdelcerro
    public boolean allowConstantFolding() {
27
        return true;
28
    }
29
30
    @Override
31 43521 jjdelcerro
    public Object call(Interpreter interpreter, Object[] args) {
32 44338 jjdelcerro
        Object date_obj = getObject(args, 0);
33
        if( date_obj instanceof Date ) {
34
            Date x = new Date(((Date) date_obj).getTime());
35
            x.setHours(0);
36
            x.setMinutes(0);
37
            x.setSeconds(0);
38
            return x;
39
        }
40 43987 jjdelcerro
        String date = getStr(args, 0);
41
        String format = null;
42
        if( args.length==2 ) {
43
            format = getStr(args, 1);
44 43512 jjdelcerro
        }
45 43987 jjdelcerro
        SimpleDateFormat df = new SimpleDateFormat();
46
        if( format != null ) {
47
            df.applyPattern(format);
48 43512 jjdelcerro
        }
49 43987 jjdelcerro
        try {
50
            Date x = df.parse(date);
51
            x.setHours(0);
52
            x.setMinutes(0);
53
            x.setSeconds(0);
54
            return x;
55
        } catch (ParseException ex) {
56
            throw new RuntimeException("Can't parse date value '"+date+"' with format '"+format==null?"":format+"'", ex);
57 43512 jjdelcerro
        }
58 43987 jjdelcerro
59 43512 jjdelcerro
    }
60
61
62
}