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package org.seasar.cubby.spi.impl; |
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import static org.seasar.cubby.internal.util.LogMessages.format; |
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import java.util.Collection; |
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import java.util.Map; |
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import java.util.TreeMap; |
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import org.seasar.cubby.converter.Converter; |
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import org.seasar.cubby.spi.ConverterProvider; |
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33 | 57 | public abstract class AbstractConverterProvider implements ConverterProvider { |
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protected abstract Collection<Converter> getConverters(); |
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public Converter getConverter(final Class<? extends Converter> converterType) { |
46 | 18 | for (final Converter converter : getConverters()) { |
47 | 324 | if (converterType.isAssignableFrom(converter.getClass())) { |
48 | 18 | return converter; |
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} |
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} |
51 | 0 | throw new IllegalArgumentException(format("ECUB0110", converterType)); |
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} |
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public Converter getConverter(final Class<?> parameterType, |
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final Class<?> objectType) { |
59 | 387 | final Class<?> destType = ConversionUtils |
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.getWrapperClassIfPrimitive(objectType); |
61 | 387 | final Converter converter = getDistanceTable(parameterType, destType); |
62 | 387 | return converter; |
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} |
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private Converter getDistanceTable(final Class<?> parameterType, |
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final Class<?> objectType) { |
67 | 387 | final Map<Integer, Converter> distanceTable = new TreeMap<Integer, Converter>(); |
68 | 387 | for (final Converter converter : getConverters()) { |
69 | 6960 | if (!converter.canConvert(parameterType, objectType)) { |
70 | 6726 | continue; |
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} |
72 | 234 | final int distance = getDistance(converter.getObjectType(), |
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objectType); |
74 | 234 | distanceTable.put(distance, converter); |
75 | 234 | } |
76 | 387 | if (distanceTable.isEmpty()) { |
77 | 189 | return null; |
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} |
79 | 198 | return distanceTable.values().iterator().next(); |
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} |
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private int getDistance(final Class<?> assigner, final Class<?> assignee) { |
83 | 234 | return getDistance(assigner, assignee, 0); |
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} |
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private int getDistance(final Class<?> assigner, final Class<?> assignee, |
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final int distance) { |
88 | 270 | if (assignee.equals(assigner)) { |
89 | 186 | return distance; |
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} |
91 | 84 | if (Enum.class.equals(assigner) && assignee.isEnum()) { |
92 | 12 | return distance + 5; |
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} |
94 | 72 | if (isImplements(assigner, assignee)) { |
95 | 0 | return distance + 5; |
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} |
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98 | 72 | final Class<?> superClass = assigner.getSuperclass(); |
99 | 72 | if (superClass == null) { |
100 | 36 | return distance + 10; |
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} |
102 | 36 | return getDistance(superClass, assignee, distance + 10); |
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} |
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private boolean isImplements(final Class<?> assigner, |
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final Class<?> assignee) { |
107 | 72 | return !assigner.isInterface() && assignee.isInterface() |
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&& assignee.isAssignableFrom(assigner); |
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} |
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} |