CustomErrorHandler - Spring Rest Template

CustomErrorHandler.java

package com.example.resttemplatedemo.handler;

import com.example.resttemplatedemo.exception.CustomExceptions;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.web.client.ResponseErrorHandler;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class CustomErrorHandler implements ResponseErrorHandler {

    @Override
    public boolean hasError(ClientHttpResponse response) throws IOException {
        return response.getStatusCode().is4xxClientError() || 
               response.getStatusCode().is5xxServerError();
    }

    @Override
    public void handleError(ClientHttpResponse response) throws IOException {
        String responseBody = new String(response.getBody().readAllBytes(), StandardCharsets.UTF_8);
        HttpStatus statusCode = (HttpStatus) response.getStatusCode();
        
        switch (statusCode) {
            case BAD_REQUEST:
                throw new CustomExceptions.BadRequestException(
                    "Bad Request: " + statusCode.getReasonPhrase(), responseBody);
            case UNAUTHORIZED:
                throw new CustomExceptions.UnauthorizedException(
                    "Unauthorized: " + statusCode.getReasonPhrase(), responseBody);
            case FORBIDDEN:
                throw new CustomExceptions.ForbiddenException(
                    "Forbidden: " + statusCode.getReasonPhrase(), responseBody);
            case NOT_FOUND:
                throw new CustomExceptions.NotFoundException(
                    "Not Found: " + statusCode.getReasonPhrase(), responseBody);
            case INTERNAL_SERVER_ERROR:
                throw new CustomExceptions.InternalServerErrorException(
                    "Internal Server Error: " + statusCode.getReasonPhrase(), responseBody);
            case SERVICE_UNAVAILABLE:
                throw new CustomExceptions.ServiceUnavailableException(
                    "Service Unavailable: " + statusCode.getReasonPhrase(), responseBody);
            default:
                throw new CustomExceptions.ApiException(
                    "HTTP Error: " + statusCode.getReasonPhrase(), 
                    statusCode.value(), responseBody);
        }
    }
}