feature: add a v2 crd generator based on jackson

crd-generator/api-v2/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    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.
+
+-->
+<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>crd-generator-parent</artifactId>
+    <groupId>io.fabric8</groupId>
+    <version>6.13-SNAPSHOT</version>
+  </parent>
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>crd-generator-api-v2</artifactId>
+  <name>Fabric8 :: CRD generator :: API V2</name>
+
+  <dependencies>
+    <dependency>
+      <groupId>io.fabric8</groupId>
+      <artifactId>kubernetes-client-api</artifactId>
+      <scope>compile</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>com.fasterxml.jackson.module</groupId>
+      <artifactId>jackson-module-jsonSchema</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>io.fabric8</groupId>
+      <artifactId>generator-annotations</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>io.fabric8</groupId>
+      <artifactId>kubernetes-model-common</artifactId>
+    </dependency>
+
+    <!-- Testing -->
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-simple</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>javax.validation</groupId>
+      <artifactId>validation-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>

crd-generator/api-v2/src/main/java/io/fabric8/crdv2/generator/AbstractCustomResourceHandler.java

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+/*
+ * 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.
+ */
+package io.fabric8.crdv2.generator;
+
+import io.fabric8.kubernetes.api.model.HasMetadata;
+
+import java.util.stream.Stream;
+
+/**
+ * This class encapsulates the common behavior between different CRD generation logic. The
+ * intent is that each CRD spec version is implemented as a sub-class of this one.
+ */
+public abstract class AbstractCustomResourceHandler {
+
+  public abstract void handle(CustomResourceInfo config, ResolvingContext resolvingContext);
+
+  public abstract Stream<HasMetadata> finish();
+
+}