/*
 * Copyright 2002-2020 the original author or authors.
 *
 * 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
 *
 *      https://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.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.web.bind.support;

import java.beans.PropertyEditor;
import java.util.List;
import java.util.Map;

import org.springframework.beans.PropertyEditorRegistry;
import org.springframework.core.MethodParameter;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.validation.BeanPropertyBindingResult;
import org.springframework.validation.BindingResult;
import org.springframework.validation.Errors;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.server.ServerWebInputException;

/**
 * A specialization of {@link ServerWebInputException} thrown when after data
 * binding and validation failure. Implements {@link BindingResult} (and its
 * super-interface {@link Errors}) to allow for direct analysis of binding and
 * validation errors.
 *
 * @author Rossen Stoyanchev
 * @since 5.0
 */
@SuppressWarnings("serial")
public class WebExchangeBindException extends ServerWebInputException implements BindingResult {

        private final BindingResult bindingResult;


        public WebExchangeBindException(MethodParameter parameter, BindingResult bindingResult) {
                super("Validation failure", parameter);
                this.bindingResult = bindingResult;
        }


        /**
         * Return the BindingResult that this BindException wraps.
         * Will typically be a BeanPropertyBindingResult.
         * @see BeanPropertyBindingResult
         */
        public final BindingResult getBindingResult() {
                return this.bindingResult;
        }


        @Override
        public String getObjectName() {
                return this.bindingResult.getObjectName();
        }

        @Override
        public void setNestedPath(String nestedPath) {
                this.bindingResult.setNestedPath(nestedPath);
        }

        @Override
        public String getNestedPath() {
                return this.bindingResult.getNestedPath();
        }

        @Override
        public void pushNestedPath(String subPath) {
                this.bindingResult.pushNestedPath(subPath);
        }

        @Override
        public void popNestedPath() throws IllegalStateException {
                this.bindingResult.popNestedPath();
        }


        @Override
        public void reject(String errorCode) {
                this.bindingResult.reject(errorCode);
        }

        @Override
        public void reject(String errorCode, String defaultMessage) {
                this.bindingResult.reject(errorCode, defaultMessage);
        }

        @Override
        public void reject(String errorCode, @Nullable Object[] errorArgs, @Nullable String defaultMessage) {
                this.bindingResult.reject(errorCode, errorArgs, defaultMessage);
        }

        @Override
        public void rejectValue(@Nullable String field, String errorCode) {
                this.bindingResult.rejectValue(field, errorCode);
        }

        @Override
        public void rejectValue(@Nullable String field, String errorCode, String defaultMessage) {
                this.bindingResult.rejectValue(field, errorCode, defaultMessage);
        }

        @Override
        public void rejectValue(
                        @Nullable String field, String errorCode, @Nullable Object[] errorArgs, @Nullable String defaultMessage) {

                this.bindingResult.rejectValue(field, errorCode, errorArgs, defaultMessage);
        }

        @Override
        public void addAllErrors(Errors errors) {
                this.bindingResult.addAllErrors(errors);
        }


        @Override
        public boolean hasErrors() {
                return this.bindingResult.hasErrors();
        }

        @Override
        public int getErrorCount() {
                return this.bindingResult.getErrorCount();
        }

        @Override
        public List<ObjectError> getAllErrors() {
                return this.bindingResult.getAllErrors();
        }

        @Override
        public boolean hasGlobalErrors() {
                return this.bindingResult.hasGlobalErrors();
        }

        @Override
        public int getGlobalErrorCount() {
                return this.bindingResult.getGlobalErrorCount();
        }

        @Override
        public List<ObjectError> getGlobalErrors() {
                return this.bindingResult.getGlobalErrors();
        }

        @Override
        @Nullable
        public ObjectError getGlobalError() {
                return this.bindingResult.getGlobalError();
        }

        @Override
        public boolean hasFieldErrors() {
                return this.bindingResult.hasFieldErrors();
        }

        @Override
        public int getFieldErrorCount() {
                return this.bindingResult.getFieldErrorCount();
        }

        @Override
        public List<FieldError> getFieldErrors() {
                return this.bindingResult.getFieldErrors();
        }

        @Override
        @Nullable
        public FieldError getFieldError() {
                return this.bindingResult.getFieldError();
        }

        @Override
        public boolean hasFieldErrors(String field) {
                return this.bindingResult.hasFieldErrors(field);
        }

        @Override
        public int getFieldErrorCount(String field) {
                return this.bindingResult.getFieldErrorCount(field);
        }

        @Override
        public List<FieldError> getFieldErrors(String field) {
                return this.bindingResult.getFieldErrors(field);
        }

        @Override
        @Nullable
        public FieldError getFieldError(String field) {
                return this.bindingResult.getFieldError(field);
        }

        @Override
        @Nullable
        public Object getFieldValue(String field) {
                return this.bindingResult.getFieldValue(field);
        }

        @Override
        @Nullable
        public Class<?> getFieldType(String field) {
                return this.bindingResult.getFieldType(field);
        }

        @Override
        @Nullable
        public Object getTarget() {
                return this.bindingResult.getTarget();
        }

        @Override
        public Map<String, Object> getModel() {
                return this.bindingResult.getModel();
        }

        @Override
        @Nullable
        public Object getRawFieldValue(String field) {
                return this.bindingResult.getRawFieldValue(field);
        }

        @Override
        @SuppressWarnings("rawtypes")
        @Nullable
        public PropertyEditor findEditor(@Nullable String field, @Nullable Class valueType) {
                return this.bindingResult.findEditor(field, valueType);
        }

        @Override
        @Nullable
        public PropertyEditorRegistry getPropertyEditorRegistry() {
                return this.bindingResult.getPropertyEditorRegistry();
        }

        @Override
        public String[] resolveMessageCodes(String errorCode) {
                return this.bindingResult.resolveMessageCodes(errorCode);
        }

        @Override
        public String[] resolveMessageCodes(String errorCode, String field) {
                return this.bindingResult.resolveMessageCodes(errorCode, field);
        }

        @Override
        public void addError(ObjectError error) {
                this.bindingResult.addError(error);
        }

        @Override
        public void recordFieldValue(String field, Class<?> type, @Nullable Object value) {
                this.bindingResult.recordFieldValue(field, type, value);
        }

        @Override
        public void recordSuppressedField(String field) {
                this.bindingResult.recordSuppressedField(field);
        }

        @Override
        public String[] getSuppressedFields() {
                return this.bindingResult.getSuppressedFields();
        }


        /**
         * Returns diagnostic information about the errors held in this object.
         */
        @Override
        public String getMessage() {
                MethodParameter parameter = getMethodParameter();
                Assert.state(parameter != null, "No MethodParameter");
                StringBuilder sb = new StringBuilder("Validation failed for argument at index ")
                                .append(parameter.getParameterIndex()).append(" in method: ")
                                .append(parameter.getExecutable().toGenericString())
                                .append(", with ").append(this.bindingResult.getErrorCount()).append(" error(s): ");
                for (ObjectError error : this.bindingResult.getAllErrors()) {
                        sb.append("[").append(error).append("] ");
                }
                return sb.toString();
        }

        @Override
        public boolean equals(@Nullable Object other) {
                return (this == other || this.bindingResult.equals(other));
        }

        @Override
        public int hashCode() {
                return this.bindingResult.hashCode();
        }

}