Added so equals and hashcode is generated in models.

client/deployment/src/main/java/io/quarkiverse/openapi/generator/deployment/CodegenConfig.java

@@ -74,7 +74,8 @@ public enum ConfigName {
         GENERATE_APIS("generate-apis"),
         GENERATE_MODELS("generate-models"),
         BEAN_VALIDATION("use-bean-validation"),
-        SERIALIZABLE_MODEL("serializable-model");
+        SERIALIZABLE_MODEL("serializable-model"),
+        EQUALS_HASHCODE("equals-hashcode");
 
         private final String name;
 

client/deployment/src/main/java/io/quarkiverse/openapi/generator/deployment/CommonItemConfig.java

@@ -172,4 +172,11 @@ public class CommonItemConfig {
      */
     @ConfigItem(name = "generate-models")
     public Optional<Boolean> generateModels;
+
+    /**
+     * Enable the generation of equals and hashcode in models. If you set this to {@code false}, the models
+     * will not have equals and hashcode.
+     */
+    @ConfigItem(name = "equals-hashcode")
+    public Optional<Boolean> equalsHashcode;
 }

client/deployment/src/main/java/io/quarkiverse/openapi/generator/deployment/codegen/OpenApiGeneratorCodeGenBase.java

@@ -320,6 +320,9 @@ protected void generate(OpenApiGeneratorOptions options) {
         getValues(smallRyeConfig, openApiFilePath, CodegenConfig.ConfigName.SERIALIZABLE_MODEL, Boolean.class)
                 .ifPresent(generator::withSerialiableModel);
 
+        getValues(smallRyeConfig, openApiFilePath, CodegenConfig.ConfigName.EQUALS_HASHCODE, Boolean.class)
+                .ifPresent(generator::withEqualsHashcode);
+
         getValues(smallRyeConfig, openApiFilePath, CodegenConfig.ConfigName.NORMALIZER, String.class, String.class)
                 .ifPresent(generator::withOpenApiNormalizer);
 

client/deployment/src/main/java/io/quarkiverse/openapi/generator/deployment/wrapper/OpenApiClientGeneratorWrapper.java

@@ -112,6 +112,7 @@ private void setDefaults() {
         this.configurator.addAdditionalProperty("use-field-name-in-part-filename", FALSE);
         this.configurator.addAdditionalProperty("verbose", FALSE);
         this.configurator.addAdditionalProperty(CodegenConstants.SERIALIZABLE_MODEL, FALSE);
+        this.configurator.addAdditionalProperty("equals-hashcode", TRUE);
     }
 
     /**
@@ -202,6 +203,11 @@ public OpenApiClientGeneratorWrapper withSerialiableModel(final Boolean serialia
         return this;
     }
 
+    public OpenApiClientGeneratorWrapper withEqualsHashcode(final Boolean equalsHashcode) {
+        this.configurator.addAdditionalProperty("equals-hashcode", equalsHashcode);
+        return this;
+    }
+
     /**
      * Sets the global 'additionalModelTypeAnnotations' setting. If not set this setting will default to empty.
      *

client/deployment/src/main/resources/templates/libraries/microprofile/pojo.qute

@@ -1,5 +1,6 @@
 {@org.openapitools.codegen.CodegenModel m}
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.util.Objects;
 
 {#if m.description}
 /**
@@ -135,6 +136,49 @@ public class {m.classname} {#if m.parent}extends {m.parent}{/if}{#if serializabl
         return sb.toString();
     }
 
+    {#if equals-hashcode}
+    {#if m.vars.size > 0}
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        {m.classname} model = ({m.classname}) o;
+
+        {#if m.vars.size == 1}
+        return Objects.equals({m.vars.0.name}, model.{m.vars.0.name});
+        {#else}
+        {#for v in m.vars}
+        {#if v_isFirst}
+        return Objects.equals({v.name}, model.{v.name}) &&
+        {#else if v_isLast}
+        Objects.equals({v.name}, model.{v.name});
+        {#else}
+        Objects.equals({v.name}, model.{v.name}) &&
+        {/if}
+        {/for}
+        {/if}
+    }
+
+    @Override
+    public int hashCode() {
+    {#if m.vars.size == 1}
+    return Objects.hash({m.vars.0.name});
+    {#else}
+        {#for v in m.vars}
+        {#if v_isFirst}
+        return Objects.hash({v.name},
+        {#else if v_isLast}
+        {v.name});
+        {#else}
+        {v.name},
+        {/if}
+        {/for}
+    {/if}
+    }
+    {/if}
+    {/if}
+
     /**
      * Convert the given object to string with each line indented by 4 spaces
      * (except the first line).

client/integration-tests/equals-hashcode/pom.xml

@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>quarkus-openapi-generator-integration-tests</artifactId>
+        <groupId>io.quarkiverse.openapi.generator</groupId>
+        <version>3.0.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>quarkus-openapi-generator-it-equals-hashcode</artifactId>
+    <name>Quarkus - Openapi Generator - Integration Tests - Client - Equals hashcode</name>
+    <description>Example project for general usage</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.quarkiverse.openapi.generator</groupId>
+            <artifactId>quarkus-openapi-generator</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-junit5</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>io.quarkus</groupId>
+                <artifactId>quarkus-maven-plugin</artifactId>
+                <extensions>true</extensions>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>build</goal>
+                            <goal>generate-code</goal>
+                            <goal>generate-code-tests</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+    <profiles>
+        <profile>
+            <id>native-image</id>
+            <activation>
+                <property>
+                    <name>native</name>
+                </property>
+            </activation>
+            <build>
+                <plugins>
+                    <plugin>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <configuration>
+                            <skipTests>${native.surefire.skip}</skipTests>
+                        </configuration>
+                    </plugin>
+                    <plugin>
+                        <artifactId>maven-failsafe-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <goals>
+                                    <goal>integration-test</goal>
+                                    <goal>verify</goal>
+                                </goals>
+                                <configuration>
+                                    <systemPropertyVariables>
+                                        <native.image.path>
+                                            ${project.build.directory}/${project.build.finalName}-runner
+                                        </native.image.path>
+                                        <java.util.logging.manager>org.jboss.logmanager.LogManager
+                                        </java.util.logging.manager>
+                                        <maven.home>${maven.home}</maven.home>
+                                    </systemPropertyVariables>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+            <properties>
+                <quarkus.package.type>native</quarkus.package.type>
+            </properties>
+        </profile>
+    </profiles>
+
+</project>

client/integration-tests/equals-hashcode/src/main/openapi/quarkus-equals-hashcode-openapi.yaml

@@ -0,0 +1,125 @@
+{
+  "openapi": "3.0.2",
+  "info": {
+    "title": "Animals - OpenAPI 3.0",
+    "version": "1.0.5"
+  },
+  "servers": [
+    {
+      "url": "/api/v3"
+    }
+  ],
+  "tags": [
+    {
+      "name": "primate",
+      "description": "Everything about Primates"
+    }
+  ],
+  "paths": {
+    "/primate/{id}": {
+      "get": {
+        "tags": [
+          "primate"
+        ],
+        "summary": "Find primate by ID",
+        "description": "Returns a single primate",
+        "operationId": "getPrimateById",
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "description": "ID of primate to return",
+            "required": true,
+            "schema": {
+              "type": "integer",
+              "format": "int64"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Primate"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Primate not found"
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "Animal": {
+        "type": "object",
+        "properties": {
+          "born": {
+            "type": "string",
+            "description": "Dated Base extension.",
+            "format": "date-time"
+          },
+          "deceased": {
+            "type": "string",
+            "description": "Dated Base extension.",
+            "format": "date-time"
+          }
+        },
+        "xml": {
+          "name": "animal"
+        }
+      },
+      "Mammal": {
+        "type": "object",
+        "allOf": [ {
+          "$ref": "#/components/schemas/Animal"
+        } ],
+        "properties": {
+          "gender": {
+            "type": "string",
+            "enum": [
+              "female",
+              "male"
+            ]
+          }
+        },
+        "xml": {
+          "name": "mammal"
+        }
+      },
+      "Primate": {
+        "required": [
+          "name"
+        ],
+        "type": "object",
+        "allOf": [
+          {
+            "$ref": "#/components/schemas/Mammal"
+          }
+        ],
+        "properties": {
+          "id": {
+            "type": "integer",
+            "format": "int64",
+            "example": 10
+          },
+          "name": {
+            "type": "string",
+            "example": "jane doe"
+          }
+        },
+        "xml": {
+          "name": "primate"
+        }
+      }
+    }
+  }
+}