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/*-
* ============LICENSE_START=======================================================
* ONAP CLAMP
* ================================================================================
* Copyright (C) 2019 AT&T Intellectual Property. All rights
* reserved.
* Modifications Copyright (C) 2020 Huawei Technologies Co., Ltd.
* ================================================================================
* 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.
* ============LICENSE_END============================================
* ===================================================================
*
*/
package org.onap.clamp.policy.operational;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TreeMap;
import org.apache.commons.lang3.math.NumberUtils;
import org.onap.clamp.loop.Loop;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.DumperOptions.ScalarStyle;
import org.yaml.snakeyaml.Yaml;
/**
* This class contains the code required to support the sending of Legacy
* operational payload to policy engine. This will probably disappear in El
* Alto.
*/
public class LegacyOperationalPolicy {
private static final String ACTOR = "actor";
private static final String RECIPE = "recipe";
private static final String POLICIES = "policies";
private static final String PAYLOAD = "payload";
private LegacyOperationalPolicy() {
}
private static void translateStringValues(String jsonKey, String stringValue, JsonElement parentJsonElement) {
if (stringValue.equalsIgnoreCase("true") || stringValue.equalsIgnoreCase("false")) {
parentJsonElement.getAsJsonObject().addProperty(jsonKey, Boolean.valueOf(stringValue));
} else if (NumberUtils.isParsable(stringValue)) {
parentJsonElement.getAsJsonObject().addProperty(jsonKey, Long.parseLong(stringValue));
}
}
private static JsonElement removeAllQuotes(JsonElement jsonElement) {
if (jsonElement.isJsonArray()) {
for (JsonElement element : jsonElement.getAsJsonArray()) {
removeAllQuotes(element);
}
} else if (jsonElement.isJsonObject()) {
for (Entry<String, JsonElement> entry : jsonElement.getAsJsonObject().entrySet()) {
if (entry.getValue().isJsonPrimitive() && entry.getValue().getAsJsonPrimitive().isString()) {
translateStringValues(entry.getKey(), entry.getValue().getAsString(), jsonElement);
} else {
removeAllQuotes(entry.getValue());
}
}
}
return jsonElement;
}
/**
* This method rework the payload attribute (yaml) that is normally wrapped in a
* string when coming from the UI.
*
* @param policyJson The operational policy json config
* @return The same object reference but modified
*/
public static JsonElement reworkPayloadAttributes(JsonElement policyJson) {
for (JsonElement policy : policyJson.getAsJsonObject().get("policies").getAsJsonArray()) {
JsonElement payloadElem = policy.getAsJsonObject().get("payload");
String payloadString = payloadElem != null ? payloadElem.getAsString() : "";
if (!payloadString.isEmpty()) {
Map<String, String> testMap = new Yaml().load(payloadString);
String json = new GsonBuilder().create().toJson(testMap);
policy.getAsJsonObject().add("payload", new GsonBuilder().create().fromJson(json, JsonElement.class));
}
}
return policyJson;
}
private static void replacePropertiesIfEmpty(JsonElement policy, String key, String valueIfEmpty) {
JsonElement payloadElem = policy.getAsJsonObject().get(key);
String payloadString = payloadElem != null ? payloadElem.getAsString() : "";
if (payloadString.isEmpty()) {
policy.getAsJsonObject().addProperty(key, valueIfEmpty);
}
}
private static JsonElement fulfillPoliciesTreeField(JsonElement policyJson) {
for (JsonElement policy : policyJson.getAsJsonObject().get("policies").getAsJsonArray()) {
replacePropertiesIfEmpty(policy, "success", "final_success");
replacePropertiesIfEmpty(policy, "failure", "final_failure");
replacePropertiesIfEmpty(policy, "failure_timeout", "final_failure_timeout");
replacePropertiesIfEmpty(policy, "failure_retries", "final_failure_retries");
replacePropertiesIfEmpty(policy, "failure_exception", "final_failure_exception");
replacePropertiesIfEmpty(policy, "failure_guard", "final_failure_guard");
// Again special case for payload, should remove it if it's there but empty
// otherwise policy crashes
JsonElement payloadElem = policy.getAsJsonObject().get("payload");
if (payloadElem != null && payloadElem.isJsonPrimitive() && payloadElem.getAsString().isEmpty()) {
policy.getAsJsonObject().remove("payload");
}
}
return policyJson;
}
private static Map<String, Object> createMap(JsonElement jsonElement) {
Map<String, Object> mapResult = new TreeMap<>();
if (jsonElement.isJsonObject()) {
for (Entry<String, JsonElement> entry : jsonElement.getAsJsonObject().entrySet()) {
if (entry.getValue().isJsonPrimitive() && entry.getValue().getAsJsonPrimitive().isString()) {
mapResult.put(entry.getKey(), entry.getValue().getAsString());
} else if (entry.getValue().isJsonPrimitive() && entry.getValue().getAsJsonPrimitive().isBoolean()) {
mapResult.put(entry.getKey(), entry.getValue().getAsBoolean());
} else if (entry.getValue().isJsonPrimitive() && entry.getValue().getAsJsonPrimitive().isNumber()) {
// Only int ro long normally, we don't need float here
mapResult.put(entry.getKey(), entry.getValue().getAsLong());
} else if (entry.getValue().isJsonArray()) {
List<Map<String, Object>> newArray = new ArrayList<>();
mapResult.put(entry.getKey(), newArray);
for (JsonElement element : entry.getValue().getAsJsonArray()) {
newArray.add(createMap(element));
}
} else if (entry.getValue().isJsonObject()) {
mapResult.put(entry.getKey(), createMap(entry.getValue()));
}
}
}
return mapResult;
}
/**
* This method transforms the configuration json to a Yaml format.
*
* @param operationalPolicyJsonElement The operational policy json config
* @return The Yaml as string
*/
public static String createPolicyPayloadYamlLegacy(JsonElement operationalPolicyJsonElement) {
DumperOptions options = new DumperOptions();
options.setDefaultScalarStyle(ScalarStyle.PLAIN);
options.setIndent(2);
options.setPrettyFlow(true);
// Policy can't support { } in the yaml
options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
return (new Yaml(options)).dump(createMap(fulfillPoliciesTreeField(
removeAllQuotes(reworkActorAttributes(operationalPolicyJsonElement.getAsJsonObject().deepCopy())))));
}
/**
* This method load mandatory field in the operational policy configuration
* JSON.
*
* @param configurationsJson The operational policy JSON
* @param loop The parent loop object
*/
public static void preloadConfiguration(JsonObject configurationsJson, Loop loop) {
if (configurationsJson != null && configurationsJson.entrySet().isEmpty()) {
JsonObject controlLoopName = new JsonObject();
controlLoopName.addProperty("controlLoopName",
loop != null ? loop.getName() : "Empty (NO loop loaded yet)");
JsonObject controlLoop = new JsonObject();
controlLoop.add("controlLoop", controlLoopName);
configurationsJson.add("operational_policy", controlLoop);
}
}
/**
* This method rework on the actor/recipe and payload attribute.
*
* @param policyJson The operational policy json config
* @return The same object reference but modified
*/
public static JsonElement reworkActorAttributes(JsonElement policyJson) {
for (JsonElement policy : policyJson.getAsJsonObject().get(POLICIES).getAsJsonArray()) {
JsonObject actor = policy.getAsJsonObject().get(ACTOR).getAsJsonObject();
policy.getAsJsonObject().remove(ACTOR);
String actorStr = actor.getAsJsonObject().get(ACTOR).getAsString();
policy.getAsJsonObject().addProperty(ACTOR, actorStr);
policy.getAsJsonObject().addProperty(RECIPE, getRecipe(actor));
if ("CDS".equalsIgnoreCase(actorStr)) {
addPayloadAttributes(actor.getAsJsonObject(ACTOR).getAsJsonObject(RECIPE), policy);
} else {
addPayloadAttributes(actor, policy);
}
}
return policyJson;
}
private static void addPayloadAttributes(JsonObject jsonObject,
JsonElement policy) {
JsonElement payloadElem = jsonObject.getAsJsonObject().get(PAYLOAD);
String payloadString = payloadElem != null ? payloadElem.getAsString() : "";
if (!payloadString.isEmpty()) {
Map<String, String> testMap = new Yaml().load(payloadString);
String json = new GsonBuilder().create().toJson(testMap);
policy.getAsJsonObject().add(PAYLOAD,
new GsonBuilder().create().fromJson(json, JsonElement.class));
} else {
policy.getAsJsonObject().addProperty(PAYLOAD, "");
}
}
private static String getRecipe(JsonObject actor) {
return actor.getAsJsonObject().get("type").getAsString();
}
}
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