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ResolvingContext.java
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ResolvingContext.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 com.fasterxml.jackson.databind.BeanProperty;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonObjectFormatVisitor;
import com.fasterxml.jackson.module.jsonSchema.JsonSchema;
import com.fasterxml.jackson.module.jsonSchema.JsonSchemaGenerator;
import com.fasterxml.jackson.module.jsonSchema.factories.JsonSchemaFactory;
import com.fasterxml.jackson.module.jsonSchema.factories.SchemaFactoryWrapper;
import com.fasterxml.jackson.module.jsonSchema.factories.VisitorContext;
import com.fasterxml.jackson.module.jsonSchema.factories.WrapperFactory;
import com.fasterxml.jackson.module.jsonSchema.types.ObjectSchema;
import io.fabric8.kubernetes.client.utils.KubernetesSerialization;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Encapsulates the stateful Jackson details that allow for crd to be fully resolved by our logic
* - holds an association of uris to already generated jackson schemas
* - holds a Jackson SchemaGenerator which is not thread-safe
*/
public class ResolvingContext {
static final class GeneratorObjectSchema extends ObjectSchema {
JavaType javaType;
Map<String, BeanProperty> beanProperties = new LinkedHashMap<>();
@Override
public void putOptionalProperty(BeanProperty property, JsonSchema jsonSchema) {
beanProperties.put(property.getName(), property);
super.putOptionalProperty(property, jsonSchema);
}
@Override
public JsonSchema putProperty(BeanProperty property, JsonSchema value) {
beanProperties.put(property.getName(), property);
return super.putProperty(property, value);
}
}
private final class KubernetesSchemaFactoryWrapper extends SchemaFactoryWrapper {
private KubernetesSchemaFactoryWrapper(SerializerProvider p, WrapperFactory wrapperFactory) {
super(p, wrapperFactory);
this.schemaProvider = new JsonSchemaFactory() {
@Override
public ObjectSchema objectSchema() {
return new GeneratorObjectSchema();
}
};
}
@Override
public JsonObjectFormatVisitor expectObjectFormat(JavaType convertedType) {
// TODO: jackson should pass in directly here if there's an anyGetter / setter
// so that we may directly mark preserve unknown
JsonObjectFormatVisitor result = super.expectObjectFormat(convertedType);
((GeneratorObjectSchema) schema).javaType = convertedType;
uriToJacksonSchema.putIfAbsent(this.visitorContext.getSeenSchemaUri(convertedType), (GeneratorObjectSchema) schema);
return result;
}
}
final JsonSchemaGenerator generator;
final ObjectMapper objectMapper;
final KubernetesSerialization kubernetesSerialization;
final Map<String, GeneratorObjectSchema> uriToJacksonSchema;
final boolean implicitPreserveUnknownFields;
private static class AccessibleKubernetesSerialization extends KubernetesSerialization {
@Override
public ObjectMapper getMapper() {
return super.getMapper();
};
}
private static AccessibleKubernetesSerialization DEFAULT_KUBERNETES_SERIALIZATION;
public static ResolvingContext defaultResolvingContext(boolean implicitPreserveUnknownFields) {
if (DEFAULT_KUBERNETES_SERIALIZATION == null) {
DEFAULT_KUBERNETES_SERIALIZATION = new AccessibleKubernetesSerialization();
}
return new ResolvingContext(DEFAULT_KUBERNETES_SERIALIZATION.getMapper(), DEFAULT_KUBERNETES_SERIALIZATION,
implicitPreserveUnknownFields);
}
public ResolvingContext forkContext() {
return new ResolvingContext(objectMapper, kubernetesSerialization, uriToJacksonSchema, implicitPreserveUnknownFields);
}
public ResolvingContext(ObjectMapper mapper, KubernetesSerialization kubernetesSerialization,
boolean implicitPreserveUnknownFields) {
this(mapper, kubernetesSerialization, new ConcurrentHashMap<>(), implicitPreserveUnknownFields);
}
private ResolvingContext(ObjectMapper mapper, KubernetesSerialization kubernetesSerialization,
Map<String, GeneratorObjectSchema> uriToJacksonSchema,
boolean implicitPreserveUnknownFields) {
this.uriToJacksonSchema = uriToJacksonSchema;
this.objectMapper = mapper;
this.kubernetesSerialization = kubernetesSerialization;
this.implicitPreserveUnknownFields = implicitPreserveUnknownFields;
generator = new JsonSchemaGenerator(mapper, new WrapperFactory() {
@Override
public SchemaFactoryWrapper getWrapper(SerializerProvider provider) {
return new KubernetesSchemaFactoryWrapper(provider, this);
}
@Override
public SchemaFactoryWrapper getWrapper(SerializerProvider provider, VisitorContext rvc) {
SchemaFactoryWrapper wrapper = getWrapper(provider);
wrapper.setVisitorContext(rvc);
return wrapper;
}
});
}
JsonSchema toJsonSchema(Class<?> clazz) {
try {
return generator.generateSchema(clazz);
} catch (JsonMappingException e) {
throw new RuntimeException(e);
}
}
}