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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.openecomp.core.utilities.json;
import org.json.JSONException;
import org.json.JSONObject;
import org.openecomp.sdc.logging.api.Logger;
import org.openecomp.sdc.logging.api.LoggerFactory;
import java.util.HashMap;
import java.util.Map;
public class JsonSchemaDataGenerator {
private static final String ROOT = "root";
private static final Logger logger =
LoggerFactory.getLogger(JsonSchemaDataGenerator.class);
boolean includeDefaults = true;
private JSONObject root;
private Map<String, Object> referencesData;
/**
* Instantiates a new Json schema data generator.
*
* @param jsonSchema the json schema
*/
public JsonSchemaDataGenerator(String jsonSchema) {
if (jsonSchema == null) {
throw new IllegalArgumentException("Input string jsonSchema can not be null");
}
root = new JSONObject(jsonSchema);
}
public void setIncludeDefaults(boolean includeDefaults) {
this.includeDefaults = includeDefaults;
}
/**
* Generates json data that conform to the schema according to turned on flags.
*
* @return json that conform to the schema
*/
public String generateData() {
referencesData = new HashMap<>();
JSONObject data = new JSONObject();
generateData(ROOT, root,
data);
// "root" is dummy name to represent the top level object
// (which, as apposed to inner objects, doesn't have a name in the schema)
return data.has(ROOT) ? data.get(ROOT).toString() : data.toString();
}
private void generateData(String propertyName, JSONObject property, JSONObject propertyData) {
if (property.has(JsonSchemaKeyword.TYPE)) {
String propertyType = property.getString(JsonSchemaKeyword.TYPE);
if (JsonSchemaKeyword.OBJECT.equals(propertyType)) {
generateObjectData(propertyName, property, propertyData);
} else {
generatePrimitiveData(propertyType, propertyName, property, propertyData);
}
} else if (property.has(JsonSchemaKeyword.REF)) {
generateReferenceData(propertyName, property.getString(JsonSchemaKeyword.REF), propertyData);
}
}
private void generateObjectData(String propertyName, JSONObject property,
JSONObject propertyData) {
JSONObject subProperties = property.getJSONObject(JsonSchemaKeyword.PROPERTIES);
JSONObject subPropertiesData = new JSONObject();
for (String subPropertyName : subProperties.keySet()) {
generateData(subPropertyName, subProperties.getJSONObject(subPropertyName),
subPropertiesData);
}
if (subPropertiesData.length() > 0) {
propertyData.put(propertyName, subPropertiesData);
}
}
private void generateReferenceData(String propertyName, String referencePath,
JSONObject propertyData) {
if (referencesData.containsKey(referencePath)) {
Object referenceData = referencesData.get(referencePath);
if (referenceData != null) {
propertyData.put(propertyName, referenceData);
}
} else {
generateData(propertyName, resolveReference(referencePath), propertyData);
referencesData.put(referencePath, propertyData.opt(propertyName));
}
}
private JSONObject resolveReference(String referencePath) {
String[] keys = referencePath.replaceFirst("#/", "").split("/");
JSONObject reference = root;
for (String key : keys) {
reference = reference.getJSONObject(key);
}
return reference;
}
private void generatePrimitiveData(String propertyType, String propertyName, JSONObject property,
JSONObject propertyData) {
if (includeDefaults) {
populateWithDefaultValue(propertyType, propertyName, property, propertyData);
}
}
private void populateWithDefaultValue(String propertyType, String propertyName,
JSONObject property, JSONObject propertyData) {
if (!property.has(JsonSchemaKeyword.DEFAULT)) {
return;
}
try {
switch (propertyType) {
case JsonSchemaKeyword.ARRAY:
propertyData.put(propertyName, property.getJSONArray(JsonSchemaKeyword.DEFAULT));
break;
case JsonSchemaKeyword.BOOLEAN:
propertyData.put(propertyName, property.getBoolean(JsonSchemaKeyword.DEFAULT));
break;
case JsonSchemaKeyword.INTEGER:
propertyData.put(propertyName, property.getInt(JsonSchemaKeyword.DEFAULT));
break;
case JsonSchemaKeyword.NUMBER:
propertyData.put(propertyName, property.getDouble(JsonSchemaKeyword.DEFAULT));
break;
case JsonSchemaKeyword.STRING:
propertyData.put(propertyName, property.getString(JsonSchemaKeyword.DEFAULT));
break;
default:
break;
}
} catch (JSONException exception) {
Object defaultValue = property.get(JsonSchemaKeyword.DEFAULT);
logger.error(String.format(
"Invalid schema: '%s' property type is '%s' but it has a default value which is not: %s.",
propertyName, propertyType, defaultValue), exception);
throw exception;
}
}
private static class JsonSchemaKeyword {
private static final String DEFAULT = "default";
private static final String TYPE = "type";
private static final String PROPERTIES = "properties";
private static final String ARRAY = "array";
private static final String BOOLEAN = "boolean";
private static final String INTEGER = "integer";
private static final String NUMBER = "number";
private static final String STRING = "string";
private static final String OBJECT = "object";
private static final String REF = "$ref";
}
}
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