/**
* 转换字符串到相应类型.
*
* @param value 待转换的字符串.
* @param toType 转换目标类型.
*/
public static Object convertStringToObject(String value, Class<?> toType) {
try {
return org.apache.commons.beanutils.ConvertUtils.convert(value, toType);
} catch (Exception e) {
throw Reflections.convertReflectionExceptionToUnchecked(e);
}
}
private static boolean isClassProxyable(Class<?> clazz) {
if (clazz.isInterface()) {
return true;
} else {
Constructor<?> constructor = Reflections.getDeclaredConstructor(clazz);
if (constructor == null) {
return false;
} else if (Modifier.isPrivate(constructor.getModifiers())) {
return false;
} else if (Reflections.isTypeOrAnyMethodFinal(clazz)) {
return false;
} else if (Reflections.isPrimitive(clazz)) {
return false;
} else if (Reflections.isArrayType(clazz)) {
return false;
} else {
return true;
}
}
}
/**
* 提取集合中的对象的一个属性(通过Getter函数), 组合成List.
*
* @param collection 来源集合.
* @param propertyName 要提取的属性名.
*/
public static List extractToList(final Collection collection, final String propertyName) {
List list = new ArrayList(collection.size());
try {
for (Object obj : collection) {
list.add(PropertyUtils.getProperty(obj, propertyName));
}
} catch (Exception e) {
throw Reflections.convertReflectionExceptionToUnchecked(e);
}
return list;
}
/**
* 提取集合中的对象的属性(通过getter函数), 组合成List.
*
* @param collection 来源集合.
* @param propertyName 要提取的属性名.
*/
@SuppressWarnings({"unchecked", "rawtypes"})
public static List convertElementPropertyToList(
final Collection collection, final String propertyName) {
List list = new ArrayList();
try {
for (Object obj : collection) {
list.add(PropertyUtils.getProperty(obj, propertyName));
}
} catch (Exception e) {
throw Reflections.convertReflectionExceptionToUnchecked(e);
}
return list;
}
/**
* 提取集合中的对象的两个属性(通过Getter函数), 组合成Map.
*
* @param collection 来源集合.
* @param keyPropertyName 要提取为Map中的Key值的属性名.
* @param valuePropertyName 要提取为Map中的Value值的属性名.
*/
public static Map extractToMap(
final Collection collection, final String keyPropertyName, final String valuePropertyName) {
Map map = new HashMap(collection.size());
try {
for (Object obj : collection) {
map.put(
PropertyUtils.getProperty(obj, keyPropertyName),
PropertyUtils.getProperty(obj, valuePropertyName));
}
} catch (Exception e) {
throw Reflections.convertReflectionExceptionToUnchecked(e);
}
return map;
}
@SuppressWarnings({"unchecked", "rawtypes"})
public static <K> K key(final Class<K> keyClass) {
Class<? extends IdGenerator> genClass =
Instances.fetch(
() -> {
Map<Class<?>, Class<? extends IdGenerator>> map =
new HashMap<Class<?>, Class<? extends IdGenerator>>();
for (Class<? extends IdGenerator> subClass :
Reflections.getSubClasses(IdGenerator.class)) {
Class<?> pcl =
Generics.resolveGenericParameter(subClass, IdGenerator.class, "K");
map.put(pcl, subClass);
}
return map;
})
.get(keyClass);
if (null == genClass) throw new SystemException("", "Could not found any key generator class.");
IdGenerator<K> g = Instances.fetch(genClass);
return g.generate();
}
@Test
public void testGetGenericTypeArgumentClass() {
assertEquals(Long.class, Reflections.getGenericTypeArgument(OtherClass.class, 0));
assertEquals(String.class, Reflections.getGenericTypeArgument(OtherClass.class, 1));
}
