io.hyscale.deployer.services.util.K8sResourcePatchUtil Maven / Gradle / Ivy
/**
* Copyright 2019 Pramati Prism, 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.hyscale.deployer.services.util;
import java.io.IOException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.flipkart.zjsonpatch.JsonDiff;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import io.hyscale.commons.exception.HyscaleException;
import io.hyscale.commons.utils.GsonProviderUtil;
import io.hyscale.commons.utils.ObjectMapperFactory;
import io.hyscale.deployer.services.exception.DeployerErrorCodes;
/**
* Utility for resource path operations
*
*/
public class K8sResourcePatchUtil {
private K8sResourcePatchUtil() {}
/**
* Creates Json diff for patch based on source and target
* @param
* @param source
* @param target
* @param klass
* @return patched object, null if source and target are not instances of same class
* @throws HyscaleException
*/
public static Object getJsonPatch(T source, T target, Class klass) throws HyscaleException {
if ((klass.isInstance(source) && klass.isInstance(target))) {
String patchString = getzJsonPatch(source, target);
return deserialize(patchString, JsonElement.class);
}
return null;
}
private static String getzJsonPatch(Object source, Object target) throws HyscaleException {
ObjectMapper mapper = ObjectMapperFactory.jsonMapper();
Gson gson = new Gson();
JsonNode patch;
try {
patch = JsonDiff.asJson(mapper.readTree(gson.toJson(source)), mapper.readTree(gson.toJson(target)));
return mapper.writeValueAsString(patch);
} catch (IOException e) {
throw new HyscaleException(e, DeployerErrorCodes.ERROR_WHILE_CREATING_PATCH);
}
}
public static Object deserialize(String jsonStr, Class targetClass) {
return GsonProviderUtil.getPrettyGsonBuilder().fromJson(jsonStr, targetClass);
}
}