[java-generator] Add the possibility to always emit additionalProperties on generated POJOs

CHANGELOG.md

@@ -8,6 +8,7 @@
 * Fix #5423: OkHttpClientImpl supports setting request method for empty payload requests
 
 #### Improvements
+* Fix #5432: [java-generator] Add the possibility to always emit `additionalProperties` on generated POJOs
 * Fix #5368: added support for additional ListOptions fields
 * Fix #5377: added a createOr and unlock function to provide a straight-forward replacement for createOrReplace.
 * Fix #5388: [crd-generator] Generate deterministic CRDs

doc/java-generation-from-CRD.md

@@ -88,6 +88,9 @@ Usage: java-gen [-hV] [-add-extra-annotations] [-enum-uppercase]
       -add-extra-annotations, --add-extra-annotations
                           Add extra lombok and sundrio annotation to the
                             generated classes
+      -always-preserve-unknown, --always-preserve-unknown
+                          Always preserve unknown fields in the generated
+                            classes
       -deserialization-datetime-format, 
         --deserialization-datetime-format=<deserializationDateTimeFormat>
                           DateTime format used for Deserialization of fields of
@@ -117,6 +120,11 @@ Usage: java-gen [-hV] [-add-extra-annotations] [-enum-uppercase]
 And the corresponding configurations of the Maven plugin are (output of `mvn help:describe -DgroupId=io.fabric8 -DartifactId=java-generator-maven-plugin -Dversion=<version> -Ddetail`):
 
 ```
+    alwaysPreserveUnknown
+      User property: fabric8.java-generator.always-preserve-unknown
+      Always preserve unknown fields in the generated classes by emitting an
+      additionalProperties field
+
     datetimeDeserializationFormat
       User property: fabric8.java-generator.datetime-deserialization-format
       DateTime format used for Deserialization of fields of type `date-time`

java-generator/cli/src/main/java/io/fabric8/java/generator/cli/GenerateJavaSources.java

@@ -63,6 +63,10 @@ public class GenerateJavaSources implements Runnable {
       "--skip-generated-annotations" }, description = "Skip emitting the @javax.annotation.processing.Generated annotation on the generated sources", required = false, hidden = true)
   Boolean skipGeneratedAnnotations = null;
 
+  @Option(names = { "-always-preserve-unknown",
+      "--always-preserve-unknown" }, description = "Always preserve unknown fields in the generated classes by emitting an additionalProperties field", required = false, hidden = false)
+  Boolean alwaysPreserveUnkown = null;
+
   @Option(names = { "-package-overrides",
       "--package-overrides" }, description = "Apply the overrides to the package names", required = false)
   Map<String, String> packageOverrides = null;
@@ -86,6 +90,7 @@ public void run() {
         uppercaseEnum,
         addExtraAnnotations,
         !noGeneratedAnnotations,
+        alwaysPreserveUnkown,
         packageOverrides,
         filesSuffixes,
         serializationDateTimeFormat,

java-generator/core/src/main/java/io/fabric8/java/generator/Config.java

@@ -29,6 +29,7 @@ public class Config {
   public static final boolean DEFAULT_UPPERCASE_ENUM = true;
   public static final boolean DEFAULT_ADD_EXTRA_ANNOTATIONS = false;
   public static final boolean DEFAULT_ADD_GENERATED_ANNOTATIONS = true;
+  public static final boolean DEFAULT_ALWAYS_PRESERVE_UNKNOWN = false;
   public static final Map<String, String> DEFAULT_PACKAGE_OVERRIDES = new HashMap<>();
   public static final List<String> DEFAULT_FILES_SUFFIXES = Arrays.asList(".yaml", ".yml", ".json");
   // RFC 3339 - from: https://swagger.io/docs/specification/data-models/data-types/
@@ -38,6 +39,7 @@ public class Config {
   private Boolean uppercaseEnums = DEFAULT_UPPERCASE_ENUM;
   private Boolean objectExtraAnnotations = DEFAULT_ADD_EXTRA_ANNOTATIONS;
   private Boolean generatedAnnotations = DEFAULT_ADD_GENERATED_ANNOTATIONS;
+  private Boolean alwaysPreserveUnknown = DEFAULT_ALWAYS_PRESERVE_UNKNOWN;
   private Map<String, String> packageOverrides = DEFAULT_PACKAGE_OVERRIDES;
   private List<String> filesSuffixes = DEFAULT_FILES_SUFFIXES;
   private String serDatetimeFormat = DEFAULT_SER_DATETIME_FORMAT;
@@ -116,6 +118,41 @@ public Config(
     }
   }
 
+  public Config(
+      Boolean uppercaseEnums,
+      Boolean objectExtraAnnotations,
+      Boolean generatedAnnotations,
+      Boolean alwaysPreserveUnknown,
+      Map<String, String> packageOverrides,
+      List<String> filesSuffixes,
+      String serDatetimeFormat,
+      String deserDatetimeFormat) {
+    if (uppercaseEnums != null) {
+      this.uppercaseEnums = uppercaseEnums;
+    }
+    if (objectExtraAnnotations != null) {
+      this.objectExtraAnnotations = objectExtraAnnotations;
+    }
+    if (generatedAnnotations != null) {
+      this.generatedAnnotations = generatedAnnotations;
+    }
+    if (alwaysPreserveUnknown != null) {
+      this.alwaysPreserveUnknown = alwaysPreserveUnknown;
+    }
+    if (packageOverrides != null) {
+      this.packageOverrides = packageOverrides;
+    }
+    if (filesSuffixes != null) {
+      this.filesSuffixes = filesSuffixes;
+    }
+    if (serDatetimeFormat != null) {
+      this.serDatetimeFormat = serDatetimeFormat;
+    }
+    if (deserDatetimeFormat != null) {
+      this.deserDatetimeFormat = deserDatetimeFormat;
+    }
+  }
+
   public boolean isUppercaseEnums() {
     return (uppercaseEnums == null) ? DEFAULT_UPPERCASE_ENUM : uppercaseEnums;
   }
@@ -132,6 +169,12 @@ public boolean isGeneratedAnnotations() {
         : generatedAnnotations;
   }
 
+  public boolean isAlwaysPreserveUnknown() {
+    return (alwaysPreserveUnknown == null)
+        ? DEFAULT_ALWAYS_PRESERVE_UNKNOWN
+        : alwaysPreserveUnknown;
+  }
+
   public Map<String, String> getPackageOverrides() {
     return (packageOverrides == null || packageOverrides.isEmpty())
         ? DEFAULT_PACKAGE_OVERRIDES

java-generator/core/src/main/java/io/fabric8/java/generator/nodes/JObject.java

@@ -307,7 +307,7 @@ public GeneratorResult generateJava() {
       }
     }
 
-    if (this.preserveUnknownFields) {
+    if (this.preserveUnknownFields || config.isAlwaysPreserveUnknown()) {
       ClassOrInterfaceType mapType = new ClassOrInterfaceType()
           .setName(Keywords.JAVA_UTIL_MAP)
           .setTypeArguments(

java-generator/core/src/test/java/io/fabric8/java/generator/ConfigTest.java

@@ -23,11 +23,12 @@ class ConfigTest {
 
   @Test
   void defaultValuesWithAllArgsConstructor() {
-    final Config result = new Config(null, null, null, null, null, null, null);
+    final Config result = new Config(null, null, null, null, null, null, null, null);
     assertThat(result)
         .returns(Config.DEFAULT_UPPERCASE_ENUM, Config::isUppercaseEnums)
         .returns(Config.DEFAULT_ADD_EXTRA_ANNOTATIONS, Config::isObjectExtraAnnotations)
         .returns(Config.DEFAULT_ADD_GENERATED_ANNOTATIONS, Config::isGeneratedAnnotations)
+        .returns(Config.DEFAULT_ALWAYS_PRESERVE_UNKNOWN, Config::isAlwaysPreserveUnknown)
         .returns(Config.DEFAULT_PACKAGE_OVERRIDES, Config::getPackageOverrides)
         .returns(Config.DEFAULT_FILES_SUFFIXES, Config::getFilesSuffixes)
         .returns(Config.DEFAULT_SER_DATETIME_FORMAT, Config::getSerDatetimeFormat)
@@ -41,6 +42,7 @@ void defaultValuesWithNoArgsConstructor() {
         .returns(Config.DEFAULT_UPPERCASE_ENUM, Config::isUppercaseEnums)
         .returns(Config.DEFAULT_ADD_EXTRA_ANNOTATIONS, Config::isObjectExtraAnnotations)
         .returns(Config.DEFAULT_ADD_GENERATED_ANNOTATIONS, Config::isGeneratedAnnotations)
+        .returns(Config.DEFAULT_ALWAYS_PRESERVE_UNKNOWN, Config::isAlwaysPreserveUnknown)
         .returns(Config.DEFAULT_PACKAGE_OVERRIDES, Config::getPackageOverrides)
         .returns(Config.DEFAULT_FILES_SUFFIXES, Config::getFilesSuffixes)
         .returns(Config.DEFAULT_SER_DATETIME_FORMAT, Config::getSerDatetimeFormat)
@@ -54,6 +56,7 @@ void defaultValuesWithBuilder() {
         .returns(Config.DEFAULT_UPPERCASE_ENUM, Config::isUppercaseEnums)
         .returns(Config.DEFAULT_ADD_EXTRA_ANNOTATIONS, Config::isObjectExtraAnnotations)
         .returns(Config.DEFAULT_ADD_GENERATED_ANNOTATIONS, Config::isGeneratedAnnotations)
+        .returns(Config.DEFAULT_ALWAYS_PRESERVE_UNKNOWN, Config::isAlwaysPreserveUnknown)
         .returns(Config.DEFAULT_PACKAGE_OVERRIDES, Config::getPackageOverrides)
         .returns(Config.DEFAULT_FILES_SUFFIXES, Config::getFilesSuffixes)
         .returns(Config.DEFAULT_SER_DATETIME_FORMAT, Config::getSerDatetimeFormat)

java-generator/core/src/test/java/io/fabric8/java/generator/GeneratorTest.java

@@ -613,6 +613,33 @@ void testObjectWithPreservedFields() {
     assertTrue(clzT.get().getFieldByName("additionalProperties").isPresent());
   }
 
+  @Test
+  void testConfigToGeneratePreservedUnknownFields() {
+    // Arrange
+    Config config = new Config(null, null, null, true, new HashMap<>(), new ArrayList<>(), null, null);
+    JObject obj = new JObject(
+        null,
+        "t",
+        null,
+        null,
+        false,
+        config,
+        null,
+        Boolean.FALSE,
+        null);
+
+    // Act
+    GeneratorResult res = obj.generateJava();
+
+    // Assert
+    assertEquals(1, res.getTopLevelClasses().size());
+    assertEquals("T", res.getTopLevelClasses().get(0).getName());
+
+    Optional<ClassOrInterfaceDeclaration> clzT = res.getTopLevelClasses().get(0).getClassByName("T");
+    assertTrue(clzT.isPresent());
+    assertTrue(clzT.get().getFieldByName("additionalProperties").isPresent());
+  }
+
   @Test
   void testObjectWithSpecialFieldNames() {
     // Arrange

java-generator/gradle-plugin/src/main/java/io/fabric8/java/generator/gradle/plugin/JavaGeneratorPluginExtension.java

@@ -100,6 +100,7 @@ public void setEnumUppercase(final Boolean isEnumUppercase) {
     javaGeneratorConfig = new Config(isEnumUppercase,
         javaGeneratorConfig.isObjectExtraAnnotations(),
         javaGeneratorConfig.isGeneratedAnnotations(),
+        javaGeneratorConfig.isAlwaysPreserveUnknown(),
         javaGeneratorConfig.getPackageOverrides(),
         javaGeneratorConfig.getFilesSuffixes(),
         javaGeneratorConfig.getSerDatetimeFormat(),
@@ -118,6 +119,7 @@ public void setExtraAnnotations(final Boolean isExtraAnnotations) {
     javaGeneratorConfig = new Config(javaGeneratorConfig.isUppercaseEnums(),
         isExtraAnnotations,
         javaGeneratorConfig.isGeneratedAnnotations(),
+        javaGeneratorConfig.isAlwaysPreserveUnknown(),
         javaGeneratorConfig.getPackageOverrides(),
         javaGeneratorConfig.getFilesSuffixes(),
         javaGeneratorConfig.getSerDatetimeFormat(),
@@ -136,6 +138,26 @@ public void setGeneratedAnnotations(final Boolean isGeneratedAnnotations) {
     javaGeneratorConfig = new Config(javaGeneratorConfig.isUppercaseEnums(),
         javaGeneratorConfig.isObjectExtraAnnotations(),
         isGeneratedAnnotations,
+        javaGeneratorConfig.isAlwaysPreserveUnknown(),
+        javaGeneratorConfig.getPackageOverrides(),
+        javaGeneratorConfig.getFilesSuffixes(),
+        javaGeneratorConfig.getSerDatetimeFormat(),
+        javaGeneratorConfig.getDeserDatetimeFormat());
+  }
+
+  /**
+   * Always preserve unknown fields in the generated classes by emitting an additionalProperties field
+   *
+   */
+  public Boolean getAlwaysPreserveUnknown() {
+    return javaGeneratorConfig.isAlwaysPreserveUnknown();
+  }
+
+  public void setAlwaysPreserveUnknown(final Boolean isAlwaysPreserveUnknown) {
+    javaGeneratorConfig = new Config(javaGeneratorConfig.isUppercaseEnums(),
+        javaGeneratorConfig.isObjectExtraAnnotations(),
+        javaGeneratorConfig.isGeneratedAnnotations(),
+        isAlwaysPreserveUnknown,
         javaGeneratorConfig.getPackageOverrides(),
         javaGeneratorConfig.getFilesSuffixes(),
         javaGeneratorConfig.getSerDatetimeFormat(),
@@ -154,6 +176,7 @@ public void setPackageOverrides(final Map<String, String> packageOverrides) {
     javaGeneratorConfig = new Config(javaGeneratorConfig.isUppercaseEnums(),
         javaGeneratorConfig.isObjectExtraAnnotations(),
         javaGeneratorConfig.isGeneratedAnnotations(),
+        javaGeneratorConfig.isAlwaysPreserveUnknown(),
         packageOverrides,
         javaGeneratorConfig.getFilesSuffixes(),
         javaGeneratorConfig.getSerDatetimeFormat(),
@@ -172,6 +195,7 @@ public void setPackageOverrides(final List<String> filesSuffixes) {
     javaGeneratorConfig = new Config(javaGeneratorConfig.isUppercaseEnums(),
         javaGeneratorConfig.isObjectExtraAnnotations(),
         javaGeneratorConfig.isGeneratedAnnotations(),
+        javaGeneratorConfig.isAlwaysPreserveUnknown(),
         javaGeneratorConfig.getPackageOverrides(),
         filesSuffixes,
         javaGeneratorConfig.getSerDatetimeFormat(),
@@ -190,6 +214,7 @@ public void setSerializationDatetimeFormat(final String serDatetimeFmt) {
     javaGeneratorConfig = new Config(javaGeneratorConfig.isUppercaseEnums(),
         javaGeneratorConfig.isObjectExtraAnnotations(),
         javaGeneratorConfig.isGeneratedAnnotations(),
+        javaGeneratorConfig.isAlwaysPreserveUnknown(),
         javaGeneratorConfig.getPackageOverrides(),
         javaGeneratorConfig.getFilesSuffixes(),
         serDatetimeFmt,
@@ -208,6 +233,7 @@ public void setDeserializationDatetimeFormat(final String deserDatetimeFmt) {
     javaGeneratorConfig = new Config(javaGeneratorConfig.isUppercaseEnums(),
         javaGeneratorConfig.isObjectExtraAnnotations(),
         javaGeneratorConfig.isGeneratedAnnotations(),
+        javaGeneratorConfig.isAlwaysPreserveUnknown(),
         javaGeneratorConfig.getPackageOverrides(),
         javaGeneratorConfig.getFilesSuffixes(),
         javaGeneratorConfig.getSerDatetimeFormat(),

java-generator/it/src/it/crd-names/pom.xml

@@ -79,7 +79,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0-M7</version>
+        <version>@maven.surefire.plugin.version@</version>
         <configuration>
           <useFile>false</useFile>
           <trimStackTrace>false</trimStackTrace>

java-generator/it/src/it/datetime-fmt/pom.xml

@@ -96,7 +96,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0-M7</version>
+        <version>@maven.surefire.plugin.version@</version>
         <configuration>
           <useFile>false</useFile>
           <trimStackTrace>false</trimStackTrace>

java-generator/it/src/it/default-values-instantiation/pom.xml

@@ -94,7 +94,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0-M7</version>
+        <version>@maven.surefire.plugin.version@</version>
         <configuration>
           <useFile>false</useFile>
           <trimStackTrace>false</trimStackTrace>

java-generator/it/src/it/escape-characters/pom.xml

@@ -76,7 +76,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0-M7</version>
+        <version>@maven.surefire.plugin.version@</version>
         <configuration>
           <useFile>false</useFile>
           <trimStackTrace>false</trimStackTrace>

java-generator/it/src/it/preserve-unknown-objects-through-config/invoker.properties

@@ -0,0 +1,17 @@
+#
+# Copyright (C) 2015 Red Hat, Inc.
+#
+# 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.
+#
+
+invoker.goals=test