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Remove dependency on Jackson via SmallRye - 1.x (#1457)
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openapi/src/main/java/io/helidon/openapi/CustomConstructor.java
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| /* | ||
| * Copyright (c) 2019-2020 Oracle and/or its affiliates. | ||
| * | ||
| * 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.helidon.openapi; | ||
|
|
||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
|
||
| import org.eclipse.microprofile.openapi.models.PathItem; | ||
| import org.eclipse.microprofile.openapi.models.Paths; | ||
| import org.eclipse.microprofile.openapi.models.callbacks.Callback; | ||
| import org.eclipse.microprofile.openapi.models.media.Content; | ||
| import org.eclipse.microprofile.openapi.models.media.MediaType; | ||
| import org.eclipse.microprofile.openapi.models.responses.APIResponse; | ||
| import org.eclipse.microprofile.openapi.models.responses.APIResponses; | ||
| import org.eclipse.microprofile.openapi.models.security.Scopes; | ||
| import org.eclipse.microprofile.openapi.models.security.SecurityRequirement; | ||
| import org.eclipse.microprofile.openapi.models.servers.ServerVariable; | ||
| import org.eclipse.microprofile.openapi.models.servers.ServerVariables; | ||
| import org.yaml.snakeyaml.TypeDescription; | ||
| import org.yaml.snakeyaml.constructor.Constructor; | ||
| import org.yaml.snakeyaml.nodes.MappingNode; | ||
| import org.yaml.snakeyaml.nodes.Node; | ||
| import org.yaml.snakeyaml.nodes.NodeId; | ||
| import org.yaml.snakeyaml.nodes.SequenceNode; | ||
|
|
||
| /** | ||
| * Specialized SnakeYAML constructor for modifying {@code Node} objects for OpenAPI types that extend {@code Map} to adjust the | ||
| * type of the child nodes of such nodes. | ||
| * <p> | ||
| * Several MicroProfile OpenAPI interfaces extend {@code Map}. For example, {@code Paths} extends {@code Map | ||
| * <String, PathItem>} and {@code SecurityRequirement} extends {@code Map<String, List<String>>}. When SnakeYAML builds the node | ||
| * corresponding to one of these types, it correctly creates each child node as a {@code MappingNode} but it assigns those | ||
| * child nodes a type of {@code Object} instead of the mapped type -- {@code PathItem} in the example above. | ||
| * </p> | ||
| * <p> | ||
| * This class customizes the preparation of the node tree in these situations by setting the types for the child nodes explicitly | ||
| * to the corresponding child type. In OpenAPI 1.1.2 there are two situations, depending on whether the mapped-to type is a | ||
| * {@code List} or not. | ||
| * </p> | ||
| * <p> | ||
| * The MicroProfile OpenAPI 2.0 versions of the interfaces no longer use this construct of an interface extending {@code Map}, so | ||
| * ideally we can remove this workaround when we adopt 2.0. | ||
| * </p> | ||
| */ | ||
| final class CustomConstructor extends Constructor { | ||
|
|
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| // maps OpenAPI interfaces which extend Map<?, type> to the mapped-to type where that mapped-to type is NOT List | ||
| private static final Map<Class<?>, Class<?>> CHILD_MAP_TYPES = new HashMap<>(); | ||
|
|
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| // maps OpenAPI interfaces which extend Map<?, List<type>> to the type that appears in the list | ||
| private static final Map<Class<?>, Class<?>> CHILD_MAP_OF_LIST_TYPES = new HashMap<>(); | ||
|
|
||
| static { | ||
| CHILD_MAP_TYPES.put(Paths.class, PathItem.class); | ||
| CHILD_MAP_TYPES.put(Callback.class, PathItem.class); | ||
| CHILD_MAP_TYPES.put(Content.class, MediaType.class); | ||
| CHILD_MAP_TYPES.put(APIResponses.class, APIResponse.class); | ||
| CHILD_MAP_TYPES.put(ServerVariables.class, ServerVariable.class); | ||
| CHILD_MAP_TYPES.put(Scopes.class, String.class); | ||
| CHILD_MAP_OF_LIST_TYPES.put(SecurityRequirement.class, String.class); | ||
| } | ||
|
|
||
| CustomConstructor(TypeDescription td) { | ||
| super(td); | ||
| } | ||
|
|
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| @Override | ||
| protected void constructMapping2ndStep(MappingNode node, Map<Object, Object> mapping) { | ||
| Class<?> parentType = node.getType(); | ||
| if (CHILD_MAP_TYPES.containsKey(parentType)) { | ||
| Class<?> childType = CHILD_MAP_TYPES.get(parentType); | ||
| node.getValue().forEach(tuple -> { | ||
| Node valueNode = tuple.getValueNode(); | ||
| if (valueNode.getType() == Object.class) { | ||
| valueNode.setType(childType); | ||
| } | ||
| }); | ||
| } else if (CHILD_MAP_OF_LIST_TYPES.containsKey(parentType)) { | ||
| Class<?> childType = CHILD_MAP_OF_LIST_TYPES.get(parentType); | ||
| node.getValue().forEach(tuple -> { | ||
| Node valueNode = tuple.getValueNode(); | ||
| if (valueNode.getNodeId() == NodeId.sequence) { | ||
| SequenceNode seqNode = (SequenceNode) valueNode; | ||
| seqNode.setListType(childType); | ||
| } | ||
| }); | ||
| } | ||
| super.constructMapping2ndStep(node, mapping); | ||
| } | ||
| } |
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