/
ApiDeserializer.java
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/
ApiDeserializer.java
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/*
* Copyright © 2015 The Gravitee team (http://gravitee.io)
*
* 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.gravitee.definition.jackson.datatype.api.deser;
import static java.util.Comparator.reverseOrder;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer;
import io.gravitee.definition.model.*;
import io.gravitee.definition.model.Properties;
import io.gravitee.definition.model.flow.Flow;
import io.gravitee.definition.model.flow.FlowStage;
import io.gravitee.definition.model.plugins.resources.Resource;
import io.gravitee.definition.model.services.Services;
import io.gravitee.definition.model.services.discovery.EndpointDiscoveryService;
import java.io.IOException;
import java.util.*;
import java.util.regex.Pattern;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author David BRASSELY (david.brassely at graviteesource.com)
* @author Azize ELAMRANI (azize.elamrani at graviteesource.com)
* @author GraviteeSource Team
*/
public class ApiDeserializer<T extends Api> extends StdScalarDeserializer<T> {
private final Logger logger = LoggerFactory.getLogger(ApiDeserializer.class);
public ApiDeserializer(Class<T> vc) {
super(vc);
}
@Override
public T deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
JsonNode node = jp.getCodec().readTree(jp);
return this.deserialize(jp, ctxt, (T) new Api(), node);
}
public T deserialize(JsonParser jp, DeserializationContext ctxt, T api, JsonNode node) throws IOException {
JsonNode idNode = node.get("id");
if (idNode == null) {
throw JsonMappingException.from(ctxt, "ID property is required");
} else {
api.setId(idNode.asText());
}
JsonNode nameNode = node.get("name");
if (nameNode == null) {
throw JsonMappingException.from(ctxt, "Name property is required");
} else {
api.setName(nameNode.asText());
}
JsonNode versionNode = node.get("version");
if (versionNode == null) {
api.setVersion("undefined");
} else {
api.setVersion(versionNode.asText());
}
api.setExecutionMode(ExecutionMode.fromLabel(node.path("execution_mode").asText()));
JsonNode proxyNode = node.get("proxy");
if (proxyNode != null) {
api.setProxy(proxyNode.traverse(jp.getCodec()).readValueAs(Proxy.class));
} else {
logger.error("A proxy property is required for {}", api.getName());
throw JsonMappingException.from(ctxt, "A proxy property is required for " + api.getName());
}
JsonNode servicesNode = node.get("services");
if (servicesNode != null) {
Services services = servicesNode.traverse(jp.getCodec()).readValueAs(Services.class);
api.getServices().set(services.getAll());
}
// Add compatibility with Definition 1.22
if (api.getServices() != null) {
EndpointDiscoveryService discoveryService = api.getServices().get(EndpointDiscoveryService.class);
if (discoveryService != null) {
api.getServices().remove(EndpointDiscoveryService.class);
Set<EndpointGroup> endpointGroups = api.getProxy().getGroups();
if (endpointGroups != null && !endpointGroups.isEmpty()) {
EndpointGroup defaultGroup = endpointGroups.iterator().next();
defaultGroup.getServices().put(EndpointDiscoveryService.class, discoveryService);
}
}
}
JsonNode resourcesNode = node.get("resources");
if (resourcesNode != null && resourcesNode.isArray()) {
resourcesNode
.elements()
.forEachRemaining(resourceNode -> {
try {
Resource resource = resourceNode.traverse(jp.getCodec()).readValueAs(Resource.class);
if (!api.getResources().contains(resource)) {
api.getResources().add(resource);
} else {
throw JsonMappingException.from(ctxt, "A resource already exists with name " + resource.getName());
}
} catch (IOException e) {
logger.error("An error occurred during api deserialization", e);
}
});
}
// If no version provided, defaults to 1.0.0
api.setDefinitionVersion(DefinitionVersion.valueOfLabel(node.path("gravitee").asText(DefinitionVersion.V1.getLabel())));
// If no flow mode provided, defaults to "default"
api.setFlowMode(FlowMode.valueOf(node.path("flow_mode").asText(FlowMode.DEFAULT.name())));
if (api.getDefinitionVersion() == DefinitionVersion.V1) {
if (node.get("flows") != null) {
throw JsonMappingException.from(ctxt, "Flows are only available for definition >= 2.x.x ");
}
JsonNode pathsNode = node.get("paths");
if (pathsNode != null) {
final Map<String, List<Rule>> paths = new TreeMap<>(reverseOrder());
pathsNode
.fields()
.forEachRemaining(jsonNode -> {
try {
List<Rule> rules = jsonNode.getValue().traverse(jp.getCodec()).readValueAs(new TypeReference<List<Rule>>() {});
paths.put(jsonNode.getKey(), rules);
} catch (IOException e) {
logger.error("Path {} cannot be de-serialized", jsonNode.getKey());
}
});
api.setPaths(paths);
}
}
if (api.getDefinitionVersion() == DefinitionVersion.V2) {
if (node.get("paths") != null) {
throw JsonMappingException.from(ctxt, "Paths are only available for definition 1.x.x ");
}
JsonNode flowsNode = node.get("flows");
if (flowsNode != null) {
final List<Flow> flows = new ArrayList<>();
flowsNode
.elements()
.forEachRemaining(jsonNode -> {
try {
Flow flow = jsonNode.traverse(jp.getCodec()).readValueAs(Flow.class);
flow.setStage(FlowStage.API);
flows.add(flow);
} catch (IOException e) {
logger.error("Flow {} cannot be de-serialized", jsonNode.asText());
}
});
api.setFlows(flows);
}
JsonNode plansNode = node.get("plans");
if (plansNode != null) {
final List<Plan> plans = new ArrayList<>();
plansNode
.elements()
.forEachRemaining(jsonNode -> {
try {
Plan plan = jsonNode.traverse(jp.getCodec()).readValueAs(Plan.class);
plan.getFlows().forEach(flow -> flow.setStage(FlowStage.PLAN));
if (plan.getApi() == null) {
plan.setApi(api.getId());
}
plans.add(plan);
} catch (IOException e) {
logger.error("Plan {} cannot be de-serialized", jsonNode.asText());
}
});
api.setPlans(plans);
}
}
JsonNode propertiesNode = node.get("properties");
if (propertiesNode != null) {
Properties properties = propertiesNode.traverse(jp.getCodec()).readValueAs(Properties.class);
api.setProperties(properties);
}
JsonNode tagsNode = node.get("tags");
if (tagsNode != null && tagsNode.isArray()) {
tagsNode.elements().forEachRemaining(jsonNode -> api.getTags().add(jsonNode.asText()));
}
JsonNode pathMappingsNode = node.get("path_mappings");
if (pathMappingsNode != null) {
pathMappingsNode
.elements()
.forEachRemaining(jsonNode -> {
String pathMapping = jsonNode.asText();
api.getPathMappings().put(pathMapping, PathMapping.buildPattern(pathMapping));
});
}
JsonNode responseTemplatesNode = node.get("response_templates");
if (responseTemplatesNode != null) {
final Map<String, Map<String, ResponseTemplate>> responseTemplates = new HashMap<>();
responseTemplatesNode
.fields()
.forEachRemaining(jsonNode -> {
try {
Map<String, ResponseTemplate> templates = jsonNode
.getValue()
.traverse(jp.getCodec())
.readValueAs(new TypeReference<Map<String, ResponseTemplate>>() {});
responseTemplates.put(jsonNode.getKey(), templates);
} catch (IOException e) {
logger.error("Response templates {} cannot be de-serialized", jsonNode.getKey());
}
});
api.setResponseTemplates(responseTemplates);
}
JsonNode definitionContextNode = node.get("definition_context");
if (definitionContextNode != null) {
DefinitionContext definitionContext = definitionContextNode.traverse(jp.getCodec()).readValueAs(DefinitionContext.class);
api.setDefinitionContext(definitionContext);
}
return api;
}
}