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package org.seasar.cubby.converter.impl; |
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import java.lang.reflect.Modifier; |
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import java.util.HashMap; |
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import java.util.LinkedHashSet; |
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import java.util.Map; |
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import java.util.Set; |
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import java.util.TreeMap; |
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import org.seasar.cubby.controller.ClassDetector; |
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import org.seasar.cubby.controller.DetectClassProcessor; |
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import org.seasar.cubby.converter.Converter; |
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import org.seasar.cubby.converter.ConverterFactory; |
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import org.seasar.framework.container.S2Container; |
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import org.seasar.framework.convention.NamingConvention; |
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import org.seasar.framework.util.ClassUtil; |
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import org.seasar.framework.util.Disposable; |
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import org.seasar.framework.util.DisposableUtil; |
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public class ConverterFactoryImpl implements ConverterFactory, DetectClassProcessor, |
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Disposable { |
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private boolean initialized; |
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private S2Container container; |
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private NamingConvention namingConvention; |
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private ClassDetector classDetector; |
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57 | 82 | private Set<Converter> converters = new LinkedHashSet<Converter>(); |
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60 | 82 | private Map<String, Converter> converterCache = new HashMap<String, Converter>(); |
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65 | 82 | public ConverterFactoryImpl() { |
66 | 82 | } |
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public void setContainer(final S2Container container) { |
75 | 82 | this.container = container.getRoot(); |
76 | 82 | } |
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public void setNamingConvention(final NamingConvention namingConvention) { |
85 | 82 | this.namingConvention = namingConvention; |
86 | 82 | } |
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public void setClassDetector(final ClassDetector classDetector) { |
95 | 82 | this.classDetector = classDetector; |
96 | 82 | } |
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public void initialize() { |
102 | 134 | if (initialized) { |
103 | 118 | return; |
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} |
105 | 16 | classDetector.detect(); |
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107 | 288 | for (final Converter converter : Converter[].class.cast(container |
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.findAllComponents(Converter.class))) { |
109 | 272 | converters.add(converter); |
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} |
111 | 16 | DisposableUtil.add(this); |
112 | 16 | initialized = true; |
113 | 16 | } |
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public void dispose() { |
120 | 16 | converters.clear(); |
121 | 16 | converterCache.clear(); |
122 | 16 | initialized = false; |
123 | 16 | } |
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public Converter getConverter(final Class<?> parameterType, |
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final Class<?> objectType) { |
130 | 134 | initialize(); |
131 | 134 | final Class<?> destType = ClassUtil |
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.getWrapperClassIfPrimitive(objectType); |
133 | 134 | final String cacheKey = cacheKey(parameterType, destType); |
134 | 134 | final Converter converter = converterCache.get(cacheKey); |
135 | 134 | if (converter != null) { |
136 | 66 | return converter; |
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} |
138 | 68 | return detectConverter(parameterType, destType); |
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} |
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private Converter detectConverter(final Class<?> parameterType, |
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final Class<?> objectType) { |
143 | 68 | final Converter converter = getDistanceTable(parameterType, objectType); |
144 | 68 | final String cacheKey = cacheKey(parameterType, objectType); |
145 | 68 | converterCache.put(cacheKey, converter); |
146 | 68 | return converter; |
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} |
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private static String cacheKey(final Class<?> parameterType, |
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final Class<?> objectType) { |
151 | 202 | if (parameterType == null) { |
152 | 15 | return objectType.getName(); |
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} |
154 | 187 | return parameterType.getName() + objectType.getName(); |
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} |
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private Converter getDistanceTable(final Class<?> parameterType, |
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final Class<?> objectType) { |
159 | 68 | final Map<Integer, Converter> distanceTable = new TreeMap<Integer, Converter>(); |
160 | 68 | for (final Converter converter : converters) { |
161 | 1156 | if (!converter.canConvert(parameterType, objectType)) { |
162 | 1130 | continue; |
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} |
164 | 26 | final int distance = getDistance(converter.getObjectType(), |
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objectType); |
166 | 26 | distanceTable.put(distance, converter); |
167 | 26 | } |
168 | 68 | if (distanceTable.isEmpty()) { |
169 | 45 | return null; |
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} |
171 | 23 | return distanceTable.values().iterator().next(); |
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} |
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private int getDistance(final Class<?> assigner, final Class<?> assignee) { |
175 | 26 | 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) { |
180 | 29 | if (assignee.equals(assigner)) { |
181 | 22 | return distance; |
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} |
183 | 7 | if (Enum.class.equals(assigner) && assignee.isEnum()) { |
184 | 1 | return distance + 5; |
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} |
186 | 6 | if (isImplements(assigner, assignee)) { |
187 | 0 | return distance + 5; |
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} |
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190 | 6 | final Class<?> superClass = assigner.getSuperclass(); |
191 | 6 | if (superClass == null) { |
192 | 3 | return distance + 10; |
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} |
194 | 3 | 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) { |
199 | 6 | return !assigner.isInterface() && assignee.isInterface() |
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&& assignee.isAssignableFrom(assigner); |
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} |
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public void processClass(final String packageName, |
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final String shortClassName) { |
211 | 5831 | if (shortClassName.indexOf('$') != -1) { |
212 | 1887 | return; |
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} |
214 | 3944 | final String className = ClassUtil.concatName(packageName, |
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shortClassName); |
216 | 3944 | if (!namingConvention.isTargetClassName(className)) { |
217 | 0 | return; |
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} |
219 | 3944 | if (!className.endsWith(namingConvention.getConverterSuffix())) { |
220 | 3587 | return; |
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} |
222 | 357 | final Class<?> clazz = ClassUtil.forName(className); |
223 | 357 | if (namingConvention.isSkipClass(clazz)) { |
224 | 0 | return; |
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} |
226 | 357 | if ((clazz.getModifiers() & Modifier.ABSTRACT) != 0) { |
227 | 68 | return; |
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} |
229 | 289 | if (!Converter.class.isAssignableFrom(clazz)) { |
230 | 0 | return; |
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} |
232 | 289 | final Converter converter = Converter.class.cast(container |
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.getComponent(clazz)); |
234 | 289 | converters.add(converter); |
235 | 289 | } |
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} |