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public static JavaBeanInfo build(Class<?> clazz, Type type, PropertyNamingStrategy propertyNamingStrategy) {
JSONType jsonType = clazz.getAnnotation(JSONType.class);
Class<?> builderClass = getBuilderClass(jsonType);
Field[] declaredFields = clazz.getDeclaredFields();//获取所有字段
Method[] methods = clazz.getMethods();//获取所有public方法
Constructor<?> defaultConstructor = getDefaultConstructor(builderClass == null ? clazz : builderClass);
Constructor<?> creatorConstructor = null;
Method buildMethod = null;
List<FieldInfo> fieldList = new ArrayList<FieldInfo>();
if (defaultConstructor == null && !(clazz.isInterface() || Modifier.isAbstract(clazz.getModifiers()))) {
...
}
if (defaultConstructor != null) {
TypeUtils.setAccessible(defaultConstructor);
}
if (builderClass != null) {
...
}
for (Method method : methods) { //
int ordinal = 0, serialzeFeatures = 0, parserFeatures = 0;
String methodName = method.getName();
if (methodName.length() < 4) {
continue;
}//方法名大于4
if (Modifier.isStatic(method.getModifiers())) {
continue;
}//非静态方法
// support builder set
if (!(method.getReturnType().equals(Void.TYPE) || method.getReturnType().equals(method.getDeclaringClass()))) {
continue;
}//返回值是void 或 clazz类
Class<?>[] types = method.getParameterTypes();
if (types.length != 1) {
continue;
}//只有一个参数
...
if (!methodName.startsWith("set")) { // TODO "set"的判断放在 JSONField 注解后面，意思是允许非 setter 方法标记 JSONField 注解？
continue;
}//方法名以set开头
char c3 = methodName.charAt(3);
String propertyName;
if (Character.isUpperCase(c3) //set后的第一个字符必须是大写或_或f
|| c3 > 512 // for unicode method name
) //获得set方法对应的字段
{
if (TypeUtils.compatibleWithJavaBean) {
propertyName = TypeUtils.decapitalize(methodName.substring(3));
} else {
propertyName = Character.toLowerCase(methodName.charAt(3)) + methodName.substring(4);
}
} else if (c3 == '_') {
propertyName = methodName.substring(4);
} else if (c3 == 'f') {
propertyName = methodName.substring(3);
} else if (methodName.length() >= 5 && Character.isUpperCase(methodName.charAt(4))) {
propertyName = TypeUtils.decapitalize(methodName.substring(3));
} else {
continue;
}
Field field = TypeUtils.getField(clazz, propertyName, declaredFields);
if (field == null && types[0] == boolean.class) {//字段不存在或是bool型
String isFieldName = "is" + Character.toUpperCase(propertyName.charAt(0)) + propertyName.substring(1);
field = TypeUtils.getField(clazz, isFieldName, declaredFields);
}
...
add(fieldList, new FieldInfo(propertyName, method, field, clazz, type, ordinal, serialzeFeatures, parserFeatures,
annotation, fieldAnnotation, null));//添加到fieldList
}
for (Field field : clazz.getFields()) { // 添加非静态字段
int modifiers = field.getModifiers();
if ((modifiers & Modifier.STATIC) != 0) {//不允许STATIC
continue;
}
if((modifiers & Modifier.FINAL) != 0) {
Class<?> fieldType = field.getType();
boolean supportReadOnly = Map.class.isAssignableFrom(fieldType)
|| Collection.class.isAssignableFrom(fieldType)
|| AtomicLong.class.equals(fieldType) //
|| AtomicInteger.class.equals(fieldType) //
|| AtomicBoolean.class.equals(fieldType);
if (!supportReadOnly) {
continue;
}
}
boolean contains = false;
for (FieldInfo item : fieldList) {
if (item.name.equals(field.getName())) {
contains = true;
break; // 已经是 contains = true，无需继续遍历
}
}
if (contains) {
continue;
}
int ordinal = 0, serialzeFeatures = 0, parserFeatures = 0;
String propertyName = field.getName();
...
add(fieldList, new FieldInfo(propertyName, null, field, clazz, type, ordinal, serialzeFeatures, parserFeatures, null,
fieldAnnotation, null));
}
for (Method method : clazz.getMethods()) { // getter methods
String methodName = method.getName();
if (methodName.length() < 4) {
continue;
}
if (Modifier.isStatic(method.getModifiers())) {
continue;
}
if (methodName.startsWith("get") && Character.isUpperCase(methodName.charAt(3))) {
if (method.getParameterTypes().length != 0) {
continue;
}
if (Collection.class.isAssignableFrom(method.getReturnType()) //
|| Map.class.isAssignableFrom(method.getReturnType()) //
|| AtomicBoolean.class == method.getReturnType() //
|| AtomicInteger.class == method.getReturnType() //
|| AtomicLong.class == method.getReturnType() //
) {
String propertyName;
...
FieldInfo fieldInfo = getField(fieldList, propertyName);
if (fieldInfo != null) {
continue;
}
if (propertyNamingStrategy != null) {
propertyName = propertyNamingStrategy.translate(propertyName);
}
add(fieldList, new FieldInfo(propertyName, method, null, clazz, type, 0, 0, 0, annotation, null, null));
}
}
}
return new JavaBeanInfo(clazz, builderClass, defaultConstructor, null, null, buildMethod, jsonType, fieldList);
}
|