com.wavemaker.tools.apidocs.tools.parser.util.ConstraintsUtil Maven / Gradle / Ivy

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 * Copyright (C) 2022-2023 WaveMaker, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * limitations under the License.
 ******************************************************************************/
package com.wavemaker.tools.apidocs.tools.parser.util;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;

import jakarta.validation.Constraint;

import org.apache.commons.lang3.ClassUtils;

import com.google.common.collect.Sets;

/**
 * @author Uday Shankar
 */
public class ConstraintsUtil {

    private static Set ignoredFields = Sets.newHashSet("groups", "payload");

    public static List getConstraintAnnotations(Field field) {
        List annotationList = new ArrayList<>();
        Annotation[] annotations = field.getAnnotations();
        for (Annotation annotation : annotations) {
            Class annotationClass = annotation.annotationType();
            Annotation[] annotationClassAnnotations = annotationClass.getAnnotations();
            boolean isConstraintClass = false;
            for (Annotation annotationClassAnnotation : annotationClassAnnotations) {
                if (annotationClassAnnotation.annotationType().equals(Constraint.class)) {
                    isConstraintClass = true;
                }
            }
            if (isConstraintClass) {
                annotationList.add(annotation);
            }
        }
        return annotationList;
    }

    public static Map getConstraintAnnotationParametersMap(Annotation annotation) {
        Class annotationClass = annotation.annotationType();
        Method[] methods = annotationClass.getDeclaredMethods();
        Map parametersMap = new LinkedHashMap<>();
        for (Method method : methods) {
            if (method.isDefault()) {
                continue;
            }
            String methodName = method.getName();
            try {
                Object value = method.invoke(annotation);
                if (canConstraintMemberBeAdded(method, value)) {
                    parametersMap.put(methodName, value);
                }
            } catch (Exception e) {
                throw new RuntimeException("Failed to get constraint annotation parameters for method [" + method + "]", e);
            }
        }
        return parametersMap;
    }

    private static boolean canConstraintMemberBeAdded(Method method, Object value) {
        if (value == null || ignoredFields.contains(method.getName())) {
            return false;
        }
        if (ClassUtils.isPrimitiveOrWrapper(value.getClass())) {
            return true;
        } else {
            return !Objects.deepEquals(value, method.getDefaultValue());
        }
    }
}