Example usage for org.apache.ibatis.reflection TypeParameterResolver resolveReturnType

Introduction

In this page you can find the example usage for org.apache.ibatis.reflection TypeParameterResolver resolveReturnType.

Prototype

public static Type resolveReturnType(Method method, Type srcType) 

Source Link

Usage

From source file:com.baomidou.mybatisplus.MybatisMapperAnnotationBuilder.java

License:Apache License

private Class<?> getReturnType(Method method) {
    Class<?> returnType = method.getReturnType();
    Type resolvedReturnType = TypeParameterResolver.resolveReturnType(method, type);
    if (resolvedReturnType instanceof Class) {
        returnType = (Class<?>) resolvedReturnType;
        if (returnType.isArray()) {
            returnType = returnType.getComponentType();
        }//from w w w  .  j a  va  2  s  . c  o m
        // gcode issue #508
        if (void.class.equals(returnType)) {
            ResultType rt = method.getAnnotation(ResultType.class);
            if (rt != null) {
                returnType = rt.value();
            }
        }
    } else if (resolvedReturnType instanceof ParameterizedType) {
        ParameterizedType parameterizedType = (ParameterizedType) resolvedReturnType;
        Class<?> rawType = (Class<?>) parameterizedType.getRawType();
        if (Collection.class.isAssignableFrom(rawType) || Cursor.class.isAssignableFrom(rawType)) {
            Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
            if (actualTypeArguments != null && actualTypeArguments.length == 1) {
                Type returnTypeParameter = actualTypeArguments[0];
                if (returnTypeParameter instanceof Class<?>) {
                    returnType = (Class<?>) returnTypeParameter;
                } else if (returnTypeParameter instanceof ParameterizedType) {
                    // (gcode issue #443) actual type can be a also a parameterized type
                    returnType = (Class<?>) ((ParameterizedType) returnTypeParameter).getRawType();
                } else if (returnTypeParameter instanceof GenericArrayType) {
                    Class<?> componentType = (Class<?>) ((GenericArrayType) returnTypeParameter)
                            .getGenericComponentType();
                    // (gcode issue #525) support List<byte[]>
                    returnType = Array.newInstance(componentType, 0).getClass();
                }
            }
        } else if (method.isAnnotationPresent(MapKey.class) && Map.class.isAssignableFrom(rawType)) {
            // (gcode issue 504) Do not look into Maps if there is not MapKey annotation
            Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
            if (actualTypeArguments != null && actualTypeArguments.length == 2) {
                Type returnTypeParameter = actualTypeArguments[1];
                if (returnTypeParameter instanceof Class<?>) {
                    returnType = (Class<?>) returnTypeParameter;
                } else if (returnTypeParameter instanceof ParameterizedType) {
                    // (gcode issue 443) actual type can be a also a parameterized type
                    returnType = (Class<?>) ((ParameterizedType) returnTypeParameter).getRawType();
                }
            }
        }
    }

    return returnType;
}

---

From source file:com.mybatisX.core.MybatisMapperAnnotationBuilder.java

License:Apache License

private Class<?> getReturnType(Method method) {
    Class<?> returnType = method.getReturnType();
    Type resolvedReturnType = TypeParameterResolver.resolveReturnType(method, type);
    if (resolvedReturnType instanceof Class) {
        returnType = (Class<?>) resolvedReturnType;
        if (returnType.isArray()) {
            returnType = returnType.getComponentType();
        }/*ww  w . ja  v  a 2 s.c om*/
        // gcode issue #508
        if (void.class.equals(returnType)) {
            ResultType rt = method.getAnnotation(ResultType.class);
            if (rt != null) {
                returnType = rt.value();
            }
        }
    } else if (resolvedReturnType instanceof ParameterizedType) {
        ParameterizedType parameterizedType = (ParameterizedType) resolvedReturnType;
        Class<?> rawType = (Class<?>) parameterizedType.getRawType();
        if (Collection.class.isAssignableFrom(rawType) || Cursor.class.isAssignableFrom(rawType)) {
            Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
            if (actualTypeArguments != null && actualTypeArguments.length == 1) {
                Type returnTypeParameter = actualTypeArguments[0];
                if (returnTypeParameter instanceof Class<?>) {
                    returnType = (Class<?>) returnTypeParameter;
                } else if (returnTypeParameter instanceof ParameterizedType) {
                    // (gcode issue #443) actual type can be a also a
                    // parameterized type
                    returnType = (Class<?>) ((ParameterizedType) returnTypeParameter).getRawType();
                } else if (returnTypeParameter instanceof GenericArrayType) {
                    Class<?> componentType = (Class<?>) ((GenericArrayType) returnTypeParameter)
                            .getGenericComponentType();
                    // (gcode issue #525) support List<byte[]>
                    returnType = Array.newInstance(componentType, 0).getClass();
                }
            }
        } else if (method.isAnnotationPresent(MapKey.class) && Map.class.isAssignableFrom(rawType)) {
            // (gcode issue 504) Do not look into Maps if there is not
            // MapKey annotation
            Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
            if (actualTypeArguments != null && actualTypeArguments.length == 2) {
                Type returnTypeParameter = actualTypeArguments[1];
                if (returnTypeParameter instanceof Class<?>) {
                    returnType = (Class<?>) returnTypeParameter;
                } else if (returnTypeParameter instanceof ParameterizedType) {
                    // (gcode issue 443) actual type can be a also a
                    // parameterized type
                    returnType = (Class<?>) ((ParameterizedType) returnTypeParameter).getRawType();
                }
            }
        }
    }
    return returnType;
}

---