svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.time / org.gvsig.expressionevaluator.time.lib / org.gvsig.expressionevaluator.time.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / date / RelativeInstantFunction.java @ 44644
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1 | 43987 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.date; |
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2 | 43512 | jjdelcerro | |
3 | 43987 | jjdelcerro | import java.text.ParseException; |
4 | import java.text.SimpleDateFormat; |
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5 | import java.util.Date; |
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6 | 44080 | jjdelcerro | import java.util.Objects; |
7 | 43512 | jjdelcerro | import org.apache.commons.lang3.Range; |
8 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Interpreter; |
9 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
10 | 44080 | jjdelcerro | import org.gvsig.timesupport.DataTypes; |
11 | import org.gvsig.timesupport.RelativeInstant; |
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12 | import org.gvsig.timesupport.TimeSupportLocator; |
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13 | import org.gvsig.tools.ToolsLocator; |
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14 | import org.gvsig.tools.dataTypes.CoercionException; |
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15 | import org.gvsig.tools.dataTypes.DataTypesManager; |
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16 | 43512 | jjdelcerro | |
17 | 44080 | jjdelcerro | public class RelativeInstantFunction extends AbstractFunction { |
18 | 43512 | jjdelcerro | |
19 | 44080 | jjdelcerro | private final DataTypesManager.Coercion toInstant; |
20 | |||
21 | public RelativeInstantFunction() {
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22 | super("Date", "RelativeInstant",Range.is(1), |
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23 | "Returns a relative instant from the arguments",
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24 | "RelativeInstant({{date}}, format)",
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25 | 43983 | jjdelcerro | new String[]{ |
26 | 43987 | jjdelcerro | "date - a string with a date",
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27 | "format - Optional. Format to use to parse the date"
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28 | 43983 | jjdelcerro | }, |
29 | 44080 | jjdelcerro | "RelativeInstant",
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30 | false
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31 | 43983 | jjdelcerro | ); |
32 | 44080 | jjdelcerro | this.toInstant = ToolsLocator.getDataTypesManager().getCoercion(DataTypes.INSTANT);
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33 | 43512 | jjdelcerro | } |
34 | |||
35 | @Override
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36 | 44009 | jjdelcerro | public boolean allowConstantFolding() { |
37 | return true; |
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38 | } |
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39 | |||
40 | @Override
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41 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object[] args) { |
42 | 44080 | jjdelcerro | if( args.length==1 ) { |
43 | Object arg0 = getObject(args, 0); |
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44 | try {
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45 | Object instant = this.toInstant.coerce(arg0); |
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46 | return instant;
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47 | } catch (CoercionException ex) {
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48 | throw new RuntimeException("Can't convert value '"+Objects.toString(arg0, "")+"' to instant.", ex); |
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49 | } |
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50 | } |
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51 | String format = getStr(args, 1); |
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52 | 43987 | jjdelcerro | String date = getStr(args, 0); |
53 | SimpleDateFormat df = new SimpleDateFormat(); |
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54 | if( format != null ) { |
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55 | df.applyPattern(format); |
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56 | 43512 | jjdelcerro | } |
57 | 43987 | jjdelcerro | try {
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58 | Date x = df.parse(date);
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59 | 44080 | jjdelcerro | RelativeInstant instant = TimeSupportLocator.getManager().createRelativeInstant(x); |
60 | return instant;
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61 | 43987 | jjdelcerro | } catch (ParseException ex) { |
62 | throw new RuntimeException("Can't parse date value '"+date+"' with format '"+format==null?"":format+"'", ex); |
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63 | 43512 | jjdelcerro | } |
64 | 43987 | jjdelcerro | |
65 | 43512 | jjdelcerro | } |
66 | |||
67 | |||
68 | } |