[BUG] modelNamePrefix should not get applied to typeMappings

Description

When you define a modelNamePrefix it also gets applied to the typeMappings target name. This causes that the importMappings not to match.

Example:

<modelNamePrefix>Abc</modelNamePrefix>
<typeMappings>string+binary=Resource</typeMappings>
<importMappings>Resource=org.springframework.core.io.Resource</importMappings>

generates an API class like:

import com.test.model.AbcResource;
...

public Mono<AbcResource> getTransaction(String transactionId) {
...

but I would expect:

import org.springframework.core.io.Resource;
...

public Mono<Resource> getTransaction(String transactionId) {
...

openapi-generator version

openapi-generator-maven-plugin 7.5.0

OpenAPI declaration file content or url

Maven plugin code

<plugin>
        <groupId>org.openapitools</groupId>
        <artifactId>openapi-generator-maven-plugin</artifactId>
        <configuration>
          <generateModelDocumentation>false</generateModelDocumentation>
          <skipValidateSpec>false</skipValidateSpec>
          <strictSpec>true</strictSpec>
          <generateApiTests>false</generateApiTests>
          <generateModelDocumentation>false</generateModelDocumentation>
          <generateModelTests>false</generateModelTests>
          <modelNamePrefix>Abc</modelNamePrefix>
          <configOptions>
            <dateLibrary>java8</dateLibrary>
            <implicitHeaders>true</implicitHeaders>
            <java8>true</java8>
            <openApiNullable>false</openApiNullable>
            <swaggerAnnotations>false</swaggerAnnotations>
            <useSpringBoot3>true</useSpringBoot3>
            <useJakartaEe>true</useJakartaEe>
            <useTags>true</useTags>
          </configOptions>
        </configuration>
        <executions>
          <execution>
            <id>generate-transaction-api</id>
            <goals>
              <goal>generate</goal>
            </goals>
            <configuration>
              <inputSpec>${project.basedir}/spec.yaml</inputSpec>
              <generatorName>java</generatorName>
              <library>webclient</library>
              <apiPackage>com.test.api</apiPackage>
              <modelPackage>com.test.model</modelPackage>
              <typeMappings>string+binary=Resource</typeMappings>
              <importMappings>Resource=org.springframework.core.io.Resource</importMappings>
            </configuration>
          </execution>
        </executions>
      </plugin>

spec.yaml:

openapi: 3.0.3
info:
  title: aaa
  version: 1.0.0

tags:
  - name: TransactionsV1
paths:
  /v1/transactions/{transactionId}:
    get:
      tags:
        - TransactionsV1
      summary: abc
      operationId: getTransaction
      parameters:
        - name: transactionId
          in: path
          required: true
          description: The transaction id.
          schema:
            type: string
      responses:
        '200':
          description: abc
          content:
            application/pdf:
              schema:
                type: string
                format: binary

Generation Details

see above

Steps to reproduce

see above

Suggest a fix

Do not apply modelNamePrefix and modelNameSuffix to typeMappings target

Use the Maven plugin configuration and spec.yaml in the report as the reproduction entry point; inspect how modelNamePrefix, typeMappings, and importMappings are processed. Done means the Resource mapping remains unchanged by the prefix and the generated API uses org.springframework.core.io.Resource as shown.