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SPR-6013, SPR-6014, SPR-6015 tests

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This commit is contained in:
Keith Donald
2009-08-17 23:13:29 +00:00
parent db40e15a3e
commit 20f5f99e9a
2 changed files with 253 additions and 59 deletions
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190
org.springframework.context/src/main/java/org/springframework/ui/format/GenericFormatterRegistry.java
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@@ -19,19 +19,24 @@ import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.text.ParseException;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.springframework.core.GenericTypeResolver;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.support.DefaultConversionService;
import org.springframework.util.Assert;
/**
* A generic implementation of {@link FormatterRegistry} suitable for use in most binding environments.
* @author Keith Donald
* @since 3.0
* @see #add(Formatter)
* @see #add(Class, Formatter)
* @see #add(AnnotationFormatterFactory)
*/
@@ -42,10 +47,21 @@ public class GenericFormatterRegistry implements FormatterRegistry {
private Map<Class, AnnotationFormatterFactory> annotationFormatters = new HashMap<Class, AnnotationFormatterFactory>();
private ConversionService conversionService = new DefaultConversionService();
/**
* Sets the type conversion service used to coerse objects to the types required for Formatting purposes.
* @param conversionService the conversion service
* @see #add(Class, Formatter)
*/
public void setConversionService(ConversionService conversionService) {
this.conversionService = conversionService;
}
// implementing FormatterRegistry
public <T> void add(Formatter<T> formatter) {
// TODO
typeFormatters.put(getFormattedObjectType(formatter.getClass()), formatter);
}
public <T> void add(Class<?> objectType, Formatter<T> formatter) {
@@ -57,11 +73,79 @@ public class GenericFormatterRegistry implements FormatterRegistry {
}
public <A extends Annotation, T> void add(AnnotationFormatterFactory<A, T> factory) {
annotationFormatters.put(getAnnotationType(factory), factory);
annotationFormatters.put(getAnnotationType(factory.getClass()), factory);
}
public Formatter<?> getFormatter(TypeDescriptor type) {
Assert.notNull(type, "The TypeDescriptor is required");
Formatter formatter = getAnnotationFormatter(type);
if (formatter == null) {
formatter = getTypeFormatter(type.getType());
}
return formatter;
}
// internal helpers
private Class getFormattedObjectType(Class formatterClass) {
Class classToIntrospect = formatterClass;
while (classToIntrospect != null) {
Type[] ifcs = classToIntrospect.getGenericInterfaces();
for (Type ifc : ifcs) {
if (ifc instanceof ParameterizedType) {
ParameterizedType paramIfc = (ParameterizedType) ifc;
Type rawType = paramIfc.getRawType();
if (Formatter.class.equals(rawType)) {
Type arg = paramIfc.getActualTypeArguments()[0];
if (arg instanceof TypeVariable) {
arg = GenericTypeResolver.resolveTypeVariable((TypeVariable) arg, formatterClass);
}
if (arg instanceof Class) {
return (Class) arg;
}
} else if (Formatter.class.isAssignableFrom((Class) rawType)) {
return getFormattedObjectType((Class) rawType);
}
} else if (Formatter.class.isAssignableFrom((Class) ifc)) {
return getFormattedObjectType((Class) ifc);
}
}
classToIntrospect = classToIntrospect.getSuperclass();
}
return null;
}
private Class getAnnotationType(Class factoryClass) {
Class classToIntrospect = factoryClass;
while (classToIntrospect != null) {
Type[] ifcs = classToIntrospect.getGenericInterfaces();
for (Type ifc : ifcs) {
if (ifc instanceof ParameterizedType) {
ParameterizedType paramIfc = (ParameterizedType) ifc;
Type rawType = paramIfc.getRawType();
if (AnnotationFormatterFactory.class.equals(rawType)) {
Type arg = paramIfc.getActualTypeArguments()[0];
if (arg instanceof TypeVariable) {
arg = GenericTypeResolver.resolveTypeVariable((TypeVariable) arg, factoryClass);
}
if (arg instanceof Class) {
return (Class) arg;
}
} else if (AnnotationFormatterFactory.class.isAssignableFrom((Class) rawType)) {
return getAnnotationType((Class) rawType);
}
} else if (AnnotationFormatterFactory.class.isAssignableFrom((Class) ifc)) {
return getAnnotationType((Class) ifc);
}
}
classToIntrospect = classToIntrospect.getSuperclass();
}
throw new IllegalArgumentException(
"Unable to extract Annotation type A argument from AnnotationFormatterFactory ["
+ factoryClass.getName() + "]; does the factory parameterize the <A> generic type?");
}
private Formatter<?> getAnnotationFormatter(TypeDescriptor type) {
Annotation[] annotations = type.getAnnotations();
for (Annotation a : annotations) {
AnnotationFormatterFactory factory = annotationFormatters.get(a.annotationType());
@@ -69,65 +153,42 @@ public class GenericFormatterRegistry implements FormatterRegistry {
return factory.getFormatter(a);
}
}
return getFormatter(type.getType());
return null;
}
// internal helpers
private Formatter<?> getFormatter(Class<?> type) {
private Formatter<?> getTypeFormatter(Class<?> type) {
Assert.notNull(type, "The Class of the object to format is required");
Formatter formatter = typeFormatters.get(type);
if (formatter != null) {
return formatter;
} else {
Formatted formatted = AnnotationUtils.findAnnotation(type, Formatted.class);
if (formatted != null) {
Class formatterClass = formatted.value();
try {
formatter = (Formatter) formatterClass.newInstance();
} catch (InstantiationException e) {
throw new IllegalStateException(
"Formatter referenced by @Formatted annotation does not have default constructor", e);
} catch (IllegalAccessException e) {
throw new IllegalStateException(
"Formatter referenced by @Formatted annotation does not have public constructor", e);
}
typeFormatters.put(type, formatter);
Class<?> formattedObjectType = getFormattedObjectType(formatter.getClass());
if (type.isAssignableFrom(formattedObjectType)) {
return formatter;
} else {
return null;
return new ConvertingFormatter(type, formattedObjectType, formatter);
}
} else {
return getDefaultFormatter(type);
}
}
private Class getAnnotationType(AnnotationFormatterFactory factory) {
Class classToIntrospect = factory.getClass();
while (classToIntrospect != null) {
Type[] genericInterfaces = classToIntrospect.getGenericInterfaces();
for (Type genericInterface : genericInterfaces) {
if (genericInterface instanceof ParameterizedType) {
ParameterizedType pInterface = (ParameterizedType) genericInterface;
if (AnnotationFormatterFactory.class.isAssignableFrom((Class) pInterface.getRawType())) {
return getParameterClass(pInterface.getActualTypeArguments()[0], factory.getClass());
}
}
}
classToIntrospect = classToIntrospect.getSuperclass();
}
throw new IllegalArgumentException(
"Unable to extract Annotation type A argument from AnnotationFormatterFactory ["
+ factory.getClass().getName() + "]; does the factory parameterize the <A> generic type?");
}
private Class getParameterClass(Type parameterType, Class converterClass) {
if (parameterType instanceof TypeVariable) {
parameterType = GenericTypeResolver.resolveTypeVariable((TypeVariable) parameterType, converterClass);
private Formatter<?> getDefaultFormatter(Class<?> type) {
Formatted formatted = AnnotationUtils.findAnnotation(type, Formatted.class);
if (formatted != null) {
Class formatterClass = formatted.value();
try {
Formatter formatter = (Formatter) formatterClass.newInstance();
typeFormatters.put(type, formatter);
return formatter;
} catch (InstantiationException e) {
throw new IllegalStateException(
"Formatter referenced by @Formatted annotation does not have default constructor", e);
} catch (IllegalAccessException e) {
throw new IllegalStateException(
"Formatter referenced by @Formatted annotation does not have public constructor", e);
}
} else {
return null;
}
if (parameterType instanceof Class) {
return (Class) parameterType;
}
throw new IllegalArgumentException("Unable to obtain the java.lang.Class for parameterType [" + parameterType
+ "] on Formatter [" + converterClass.getName() + "]");
}
private static class SimpleAnnotationFormatterFactory implements AnnotationFormatterFactory {
@@ -144,4 +205,31 @@ public class GenericFormatterRegistry implements FormatterRegistry {
}
private class ConvertingFormatter implements Formatter {
private Class<?> type;
private Class<?> formattedObjectType;
private Formatter targetFormatter;
public ConvertingFormatter(Class<?> type, Class<?> formattedObjectType, Formatter targetFormatter) {
this.type = type;
this.formattedObjectType = formattedObjectType;
this.targetFormatter = targetFormatter;
}
public String format(Object object, Locale locale) {
object = conversionService.convert(object, formattedObjectType);
return targetFormatter.format(object, locale);
}
public Object parse(String formatted, Locale locale) throws ParseException {
Object parsed = targetFormatter.parse(formatted, locale);
parsed = conversionService.convert(parsed, type);
return parsed;
}
}
}