| 1 | package fr.sii.ogham.core.convert; | |
| 2 | ||
| 3 | import java.util.ArrayList; | |
| 4 | import java.util.Arrays; | |
| 5 | import java.util.List; | |
| 6 | ||
| 7 | import fr.sii.ogham.core.exception.convert.ConversionException; | |
| 8 | ||
| 9 | /** | |
| 10 | * Calls registered {@link SupportingConverter}s to make the real conversion. It | |
| 11 | * asks each {@link SupportingConverter} if it can make the conversion. If the | |
| 12 | * {@link SupportingConverter} can do the conversion, the conversion is applied | |
| 13 | * using that {@link SupportingConverter} and the result is immediately | |
| 14 | * returned. | |
| 15 | * | |
| 16 | * If none of the registered {@link SupportingConverter}s can make the | |
| 17 | * conversion, then a {@link ConversionException} is thrown. | |
| 18 | * | |
| 19 | * If the source is null, then the result is null too. | |
| 20 | * | |
| 21 | * <strong>Registration order is important.</strong> | |
| 22 | * | |
| 23 | * @author Aurélien Baudet | |
| 24 | * | |
| 25 | */ | |
| 26 | public class DelegateConverter implements Converter, ConverterRegistry { | |
| 27 | private final List<SupportingConverter> delegates; | |
| 28 | ||
| 29 | /** | |
| 30 | * Registers none, one or several converters | |
| 31 | * | |
| 32 | * @param delegates | |
| 33 | * the converters to register | |
| 34 | */ | |
| 35 | public DelegateConverter(SupportingConverter... delegates) { | |
| 36 | this(new ArrayList<>(Arrays.asList(delegates))); | |
| 37 | } | |
| 38 | ||
| 39 | /** | |
| 40 | * Registers a list of converters. The list must not be null | |
| 41 | * | |
| 42 | * @param delegates | |
| 43 | * the converters to register | |
| 44 | */ | |
| 45 | public DelegateConverter(List<SupportingConverter> delegates) { | |
| 46 | super(); | |
| 47 | this.delegates = delegates; | |
| 48 | } | |
| 49 | ||
| 50 | @Override | |
| 51 | public ConverterRegistry register(SupportingConverter converter) { | |
| 52 |
1
1. register : negated conditional → RUN_ERROR |
if (!delegates.contains(converter)) { |
| 53 | delegates.add(converter); | |
| 54 | } | |
| 55 |
1
1. register : replaced return value with null for fr/sii/ogham/core/convert/DelegateConverter::register → RUN_ERROR |
return this; |
| 56 | } | |
| 57 | ||
| 58 | @Override | |
| 59 | public <T> T convert(Object source, Class<T> targetType) { | |
| 60 |
1
1. convert : negated conditional → RUN_ERROR |
if (source == null) { |
| 61 | return null; | |
| 62 | } | |
| 63 | for (SupportingConverter converter : delegates) { | |
| 64 |
1
1. convert : negated conditional → RUN_ERROR |
if (converter.supports(source.getClass(), targetType)) { |
| 65 |
1
1. convert : replaced return value with null for fr/sii/ogham/core/convert/DelegateConverter::convert → RUN_ERROR |
return converter.convert(source, targetType); |
| 66 | } | |
| 67 | } | |
| 68 | throw new ConversionException("No converter available to convert " + source + " into " + targetType.getSimpleName()); | |
| 69 | } | |
| 70 | ||
| 71 | @Override | |
| 72 | public List<SupportingConverter> getRegisteredConverters() { | |
| 73 |
1
1. getRegisteredConverters : replaced return value with Collections.emptyList for fr/sii/ogham/core/convert/DelegateConverter::getRegisteredConverters → NO_COVERAGE |
return delegates; |
| 74 | } | |
| 75 | ||
| 76 | } | |
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