Expose isDeprecated variable to model template

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenModel.java

@@ -74,7 +74,7 @@ public class CodegenModel implements IJsonSchemaValidationProperties {
     public Set<String> allMandatory = new TreeSet<String>(); // with parent's required properties
 
     public Set<String> imports = new TreeSet<String>();
-    public boolean hasVars, emptyVars, hasMoreModels, hasEnums, isEnum, isNullable, hasRequired, hasOptional, isArrayModel, hasChildren, isMapModel;
+    public boolean hasVars, emptyVars, hasMoreModels, hasEnums, isEnum, isNullable, hasRequired, hasOptional, isArrayModel, hasChildren, isMapModel, isDeprecated;
     public boolean hasOnlyReadOnly = true; // true if all properties are read-only
     public ExternalDocumentation externalDocumentation;
 
@@ -543,6 +543,7 @@ public boolean equals(Object o) {
                 isArrayModel == that.isArrayModel &&
                 hasChildren == that.hasChildren &&
                 isMapModel == that.isMapModel &&
+                isDeprecated == that.isDeprecated &&
                 hasOnlyReadOnly == that.hasOnlyReadOnly &&
                 getUniqueItems() == that.getUniqueItems() &&
                 getExclusiveMinimum() == that.getExclusiveMinimum() &&
@@ -609,7 +610,7 @@ public int hashCode() {
                 getVars(), getAllVars(), getRequiredVars(), getOptionalVars(), getReadOnlyVars(), getReadWriteVars(),
                 getParentVars(), getAllowableValues(), getMandatory(), getAllMandatory(), getImports(), hasVars,
                 isEmptyVars(), hasMoreModels, hasEnums, isEnum, isNullable, hasRequired, hasOptional, isArrayModel,
-                hasChildren, isMapModel, hasOnlyReadOnly, getExternalDocumentation(), getVendorExtensions(),
+                hasChildren, isMapModel, isDeprecated, hasOnlyReadOnly, getExternalDocumentation(), getVendorExtensions(),
                 getAdditionalPropertiesType(), getMaxProperties(), getMinProperties(), getUniqueItems(), getMaxItems(),
                 getMinItems(), getMaxLength(), getMinLength(), getExclusiveMinimum(), getExclusiveMaximum(), getMinimum(),
                 getMaximum(), getPattern(), getMultipleOf());
@@ -673,6 +674,7 @@ public String toString() {
         sb.append(", isArrayModel=").append(isArrayModel);
         sb.append(", hasChildren=").append(hasChildren);
         sb.append(", isMapModel=").append(isMapModel);
+        sb.append(", isDeprecated=").append(isDeprecated);
         sb.append(", hasOnlyReadOnly=").append(hasOnlyReadOnly);
         sb.append(", externalDocumentation=").append(externalDocumentation);
         sb.append(", vendorExtensions=").append(vendorExtensions);

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java

@@ -2117,6 +2117,10 @@ public CodegenModel fromModel(String name, Schema schema) {
                 || isAliasOfSimpleTypes(schema)); // check if the unaliased schema is an alias of simple OAS types
         m.discriminator = createDiscriminator(name, schema);
 
+        if (schema.getDeprecated() != null) {
+            m.isDeprecated = schema.getDeprecated();
+        }
+
         if (schema.getXml() != null) {
             m.xmlPrefix = schema.getXml().getPrefix();
             m.xmlNamespace = schema.getXml().getNamespace();

modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java

@@ -774,6 +774,19 @@ public void testNullableProperty() {
         Assert.assertTrue(property.isNullable);
     }
 
+    @Test
+    public void testDeprecatedModel() {
+        final OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/3_0/component-deprecated.yml");
+        new InlineModelResolver().flatten(openAPI);
+        final DefaultCodegen codegen = new DefaultCodegen();
+
+        CodegenModel codedenPetModel = codegen.fromModel("Pet", openAPI.getComponents().getSchemas().get("Pet"));
+        Assert.assertTrue(codedenPetModel.isDeprecated);
+
+        CodegenModel codegenFoodModel = codegen.fromModel("Food", openAPI.getComponents().getSchemas().get("Food"));
+        Assert.assertTrue(codegenFoodModel.isDeprecated);
+    }
+
     @Test
     public void testDeprecatedProperty() {
         final OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/3_0/property-deplicated.yaml");

modules/openapi-generator/src/test/resources/3_0/component-deprecated.yml

@@ -0,0 +1,37 @@
+openapi: 3.0.1
+info:
+  version: 1.0.0
+  title: Example
+  license:
+    name: MIT
+servers:
+  - url: http://api.example.xyz/v1
+
+components:
+  schemas:
+    Food:
+      deprecated: true
+      type: string
+      enum:
+        - dry
+        - wet
+
+    Pet:
+      title: a Pet
+      deprecated: true
+      description: A pet up for adoption
+      type: object
+      required:
+        - name
+        - status
+      properties:
+        name:
+          type: string
+          example: doggie
+        status:
+          type: string
+          description: pet status
+          enum:
+            - available
+            - pending
+            - adopted