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1 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by |
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3 * Björnsen Beratende Ingenieure GmbH |
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4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt |
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5 * |
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6 * This file is Free Software under the GNU AGPL (>=v3) |
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7 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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8 * documentation coming with Dive4Elements River for details. |
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9 */ |
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10 package org.dive4elements.river.artifacts.common; |
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11 |
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12 import java.text.NumberFormat; |
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13 import java.util.HashMap; |
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14 import java.util.Locale; |
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15 import java.util.Map; |
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16 |
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17 import org.apache.commons.lang.StringUtils; |
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18 import org.dive4elements.artifacts.CallContext; |
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19 import org.dive4elements.artifacts.CallMeta; |
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20 import org.dive4elements.river.artifacts.resources.Resources; |
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21 |
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22 /** |
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23 * @author Domenico Nardi Tironi |
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24 */ |
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25 public abstract class AbstractResultType implements IResultType { |
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26 |
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27 /* Cache for formatters because Formatter will always create new formats (which is very expensive) */ |
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28 private final Map<Locale, NumberFormat> formatters = new HashMap<>(); |
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29 |
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30 private final String unit; |
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31 |
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32 private final String csvHeader; |
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33 |
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34 private final String pdfHeader; |
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35 |
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36 protected AbstractResultType(final String unit, final String csvHeader, final String pdfHeader) { |
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37 this.unit = unit; |
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38 this.csvHeader = csvHeader; |
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39 this.pdfHeader = pdfHeader; |
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40 |
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41 } |
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42 |
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43 @Override |
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44 public abstract String exportValue(final CallContext context, final Object value); |
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45 |
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46 protected final String exportStringValue(final Object value) { |
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47 |
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48 if (value == null) |
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49 return StringUtils.EMPTY; |
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50 |
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51 if (!(value instanceof String)) |
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52 throw new IllegalStateException(); |
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53 |
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54 return (String) value; |
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55 } |
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56 |
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57 @Override |
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58 public final double asDouble(final Object value) { |
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59 if (value == null) |
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60 return Double.NaN; |
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61 |
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62 if (!(value instanceof Number)) |
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63 throw new IllegalStateException(); |
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64 |
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65 final Number number = (Number) value; |
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66 return number.doubleValue(); |
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67 } |
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68 |
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69 protected final String exportDoubleValue(final CallContext context, final double value) { |
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70 if (Double.isNaN(value)) |
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71 return StringUtils.EMPTY; |
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72 |
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73 final NumberFormat formatter = getFormatter(context); |
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74 return formatter.format(value); |
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75 } |
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76 |
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77 private NumberFormat getFormatter(final CallContext context) { |
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78 final CallMeta meta = context.getMeta(); |
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79 final Locale locale = Resources.getLocale(meta); |
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80 |
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81 if (!this.formatters.containsKey(locale)) |
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82 this.formatters.put(locale, createFormatter(context)); |
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83 |
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84 return this.formatters.get(locale); |
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85 } |
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86 |
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87 protected abstract NumberFormat createFormatter(CallContext context); |
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88 |
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89 public final String getCsvHeader() { |
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90 return this.csvHeader; |
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91 } |
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92 |
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93 public final String getCsvHeader(final CallMeta meta) { |
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94 return Resources.getMsg(meta, this.csvHeader, this.csvHeader); |
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95 } |
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96 |
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97 public final String getPdfHeader(final CallMeta meta) { |
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98 return Resources.getMsg(meta, this.pdfHeader, this.pdfHeader); |
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99 } |
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100 |
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101 public final String getUnit() { |
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102 return this.unit; |
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103 } |
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104 } |
