search

Chrimle / openapi-to-java-records-mustache-templates

Generate Java Records from OpenAPI Specifications
https://chrimle.github.io/openapi-to-java-records-mustache-templates/
Apache License 2.0
3 stars 0 forks source link
java java-17 mustache mustache-templates openapi openapi-generator openapi-generator-maven-plugin openapi-specification openapi3

readme

openapi-to-java-records-mustache-templates

Java CI with Maven Maven Package pages-build-deployment

Project containing Mustache-templates used by openapi-generator-maven-plugin to generate Java Records from OpenAPI Specifications.

This project contains the mustache templates.

Apache License 2.0

Starting with project version 2.0.0, the project is licensed under the Apache License 2.0.
Prior to version 2.0.0, the project was licensed under the MIT License. See License.

Sponsorship

If you want to sponsor the project, you can do so by sharing the project with others - or head over to GitHub Sponsors - @Chrimle!

Getting Started

The mustache templates can be acquired through multiple ways.

Import Dependency

<dependency>
    <groupId>io.github.chrimle</groupId>
    <artifactId>openapi-to-java-records-mustache-templates</artifactId>
    <version>2.2.0</version>
</dependency>

Use the .mustache templates when generating

Place the file(s) in desired directory. Then, in the Maven build configuration, set the property <templateDirectory> to the directory path. Example:

<build>
  <plugins>
    <plugin>
      <groupId>org.openapitools</groupId>
      <artifactId>openapi-generator-maven-plugin</artifactId>
      <executions>
        <execution>
          <goals>
            <goal>generate</goal>
          </goals>
          <configuration>
            <inputSpec><!-- Relative directory path to the openapi.yaml file --></inputSpec>
            <templateDirectory><!-- Relative directory path to the mustache templates --></templateDirectory>
            <output><!-- Relative directory path to where generated classes should be placed --></output>
          </configuration>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>

Additional Configurations

The generated classes are customizable by using <configuration>-properties.

In this example, each generated class field will be annotated with Jakarta Bean Validation annotations.

  <configuration>
    <!-- ... more configurations ... -->
    <configOptions>
      <useBeanValidation>true</useBeanValidation>
      <!-- ... more configOptions ... -->
    </configOptions>
  </configuration>

[!TIP] See Supported 'openapi‐generator‐maven‐plugin' Configuration options

OpenAPI Specification

Example OpenAPI Specification ```yaml components: schemas: Name: description: Name Information type: object required: - firstName - lastName properties: firstName: description: First Name type: string minLength: 2 lastName: description: Last Name type: string minLength: 2 middleName: description: Middle Name type: string nullable: true Person: description: Personal information deprecated: true type: object required: - name - age - gender - height - ssn - aliases - email - trackingCode - uuid properties: name: description: Name type: object $ref: '#/components/schemas/Name' age: description: Age (years) type: integer minimum: 0 maximum: 100 gender: description: Gender type: string enum: - Male - Female height: description: Height (m) type: number pattern: float minimum: 0 legalGuardian: description: Legal Guardian type: object $ref: '#/components/schemas/Person' ssn: description: Social Security Number type: string pattern: '^\d{3}-\d{2}-\d{4}$' aliases: description: Known Aliases type: array uniqueItems: true minItems: 1 maxItems: 3 items: type: string telephoneNumber: description: Telephone Number type: string nullable: true email: description: Email Address type: string format: email trackingCode: description: Tracking code for Web analytics type: string minLength: 5 maxLength: 50 default: "utm_source=default" uuid: description: An Universally Unique Identifier type: string format: uuid ```

[!TIP] See Supported OpenAPI Specification properties

Generate models

Compile the project, for example via:

mvn compile

[!TIP] Further information about how to generate models can be found on openapi-generator-maven-plugin.

Generated Java Record

Unless the configuration property <output> has been set, the generated classes should be found under ./target/generated-sources/openapi.

Resulting Java record from example OpenAPI spec. ```java package io.github.chrimle.example; import ...; /** * Personal information * * @deprecated * @param name Name * @param age Age (years) * @param gender Gender * @param height Height (m) * @param legalGuardian Person * @param ssn Social Security Number * @param aliases Known Aliases * @param telephoneNumber Telephone Number * @param email Email Address * @param trackingCode Tracking code for Web analytics * @param uuid An Universally Unique Identifier */ @Deprecated public record Person( @javax.annotation.Nonnull @Valid @NotNull Name name, @javax.annotation.Nonnull @NotNull @Min(0) @Max(100) Integer age, @javax.annotation.Nonnull @NotNull GenderEnum gender, @javax.annotation.Nonnull @NotNull @DecimalMin("0") BigDecimal height, @javax.annotation.Nonnull @Valid Person legalGuardian, @javax.annotation.Nonnull @NotNull @Pattern(regexp = "^\\d{3}-\\d{2}-\\d{4}$") String ssn, @javax.annotation.Nonnull @NotNull @Size(min = 1, max = 3) Set aliases, @javax.annotation.Nullable String telephoneNumber, @javax.annotation.Nonnull @NotNull @Email String email, @javax.annotation.Nonnull @NotNull @Size(min = 5, max = 50) String trackingCode, @javax.annotation.Nonnull @NotNull UUID uuid) { public Person( @javax.annotation.Nonnull final Name name, @javax.annotation.Nonnull final Integer age, @javax.annotation.Nonnull final GenderEnum gender, @javax.annotation.Nonnull final BigDecimal height, @javax.annotation.Nonnull final Person legalGuardian, @javax.annotation.Nonnull final String ssn, @javax.annotation.Nullable final Set aliases, @javax.annotation.Nullable final String telephoneNumber, @javax.annotation.Nonnull final String email, @javax.annotation.Nullable final String trackingCode, @javax.annotation.Nonnull final UUID uuid) { this.name = name; this.age = age; this.gender = gender; this.height = height; this.legalGuardian = legalGuardian; this.ssn = ssn; this.aliases = Objects.requireNonNullElse(aliases, new LinkedHashSet<>()); this.telephoneNumber = telephoneNumber; this.email = email; this.trackingCode = Objects.requireNonNullElse(trackingCode, "utm_source=default"); this.uuid = uuid; } /** * Gender */ public enum GenderEnum { MALE("Male"), FEMALE("Female"); private final String value; GenderEnum(final String value) { this.value = value; } /** * Gets the {@code value} of this enum. * * @return value of this enum */ public String getValue() { return value; } /** * Case-sensitively parses the given string to an enum constant whose {@link #getValue()} * matches the provided value. * * @param value of the Enum * @return a {@link GenderEnum } with the matching value * @throws IllegalArgumentException if no enum has a value matching the given value */ public static GenderEnum fromValue(final String value) { for (final GenderEnum constant : GenderEnum.values()) { if (constant.getValue().equals(value)) { return constant; } } throw new IllegalArgumentException("Unexpected value '" + value + "'"); } } } ```

Further examples

All supported plugin <configuration>-options and OpenAPI Specification-properties have been tested. For reference:

Useful Resources

Encountered an issue?

Double-check that build-configurations and the OpenAPI Specification is supported. If problems persist, check the open issues. If the problem you are facing is not already reported, please open an issue with details and instructions to reproduce.

License

                             Apache License
                       Version 2.0, January 2004
                    http://www.apache.org/licenses/

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

  1. Definitions.

    "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document.

    "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License.

    "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity.

    "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License.

    "Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files.

    "Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types.

    "Work" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below).

    "Derivative Works" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof.

    "Contribution" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as "Not a Contribution."

    "Contributor" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work.

  2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form.

  3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed.

  4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions:

    (a) You must give any other recipients of the Work or Derivative Works a copy of this License; and

    (b) You must cause any modified files to carry prominent notices stating that You changed the files; and

    (c) You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and

    (d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License.

    You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use, reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License.

  5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions.

  6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file.

  7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License.

  8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages.

  9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability.

    END OF TERMS AND CONDITIONS

    APPENDIX: How to apply the Apache License to your work.

    To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives.

    Copyright 2024 Chrimle

    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. See the License for the specific language governing permissions and limitations under the License.