OpenApi's typeMapping Date=Date is not working

Question

I am having trouble generating the client code with the right type mapping. My client is broken because fields of type date are generated as string :

//Server code (Java)
@ApiModel(description = "ContractExtensionDto")
@Data
@NoArgsConstructor
public class ContractExtensionDto {
    @NotNull
    protected Integer id;
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = PatternConfig.DATE_TIME_FORMAT)
    protected Date dateStart;
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = PatternConfig.DATE_TIME_FORMAT)
    protected Date dateEnd;
    //omitted code
}

//Generated client code (Typescript)
export interface ContractExtensionDto { 
    id: number;
    dateStart?: string;
    dateEnd?: string;
    //omitted code
} 

In my pom.xml I have added both typeMappings and importMappings :

<plugin>
        <groupId>org.openapitools</groupId>
        <artifactId>openapi-generator-maven-plugin</artifactId>
        <version>6.0.0</version>
        <executions>
            <execution>
                <goals>
                    <goal>generate</goal>
                </goals>
                <configuration>
                    <inputSpec>${project.build.directory}/classes/swagger/swagger.json</inputSpec>
                    <generatorName>typescript-angular</generatorName>
                    <output>frontend/src/app/services/rest-api</output>
                    <skipValidateSpec>true</skipValidateSpec>
                    <configOptions>
                        <ngVersion>10.2.5</ngVersion>
                        <dateLibrary>java8</dateLibrary>
                    </configOptions>
                    <typeMappings>Date=Date</typeMappings>
                    <importMappings>Date=Date</importMappings>
                    <!-- I have tried this as well but in vain -->
                    <!-- 
                      <typeMappings>DateTime=Date</typeMappings>
                      <importMappings>DateTime=Date</importMappings>
                    -->
                </configuration>
            </execution>
        </executions>
      </plugin>

but still the client date fields are generated as string typed.

Answer 1

Define typeMappings as below, instead:

<typeMappings>
    <mapping>DateTime=Date</mapping>
    <mapping>Date=Date</mapping>
</typeMappings>

This worked with typescript-angular generator, at least.