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/**
* ============LICENSE_START=======================================================
* Gizmo
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property.
* Copyright © 2017 Amdocs
* 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=========================================================
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*/
package org.openecomp.schema;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.openecomp.crud.exception.CrudException;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import javax.ws.rs.core.Response.Status;
public class RelationshipSchema {
private static final Gson gson = new GsonBuilder().create();
public static final String SCHEMA_SOURCE_NODE_TYPE = "source-node-type";
public static final String SCHEMA_TARGET_NODE_TYPE = "target-node-type";
public static final String SCHEMA_RELATIONSHIP_TYPE = "relationship-type";
public static final String SCHEMA_RELATIONSHIP_TYPES_ARRAY = "relationship-types";
public static final String SCHEMA_RELATIONSHIP_PROPERTIES = "properties";
public static final String SCHEMA_RELATIONS_ARRAY = "relations";
/**
* key = source-node-type:target-node-type:relationship-type value = map of properties with name
* and type . Like propertyName:PropertyType
*/
private HashMap<String, HashMap<String, Class<?>>> relations
= new HashMap<String, HashMap<String, Class<?>>>();
/**
* Hashmap of valid relationship types alongwith properrties.
*/
private HashMap<String, HashMap<String, Class<?>>> relationTypes
= new HashMap<String, HashMap<String, Class<?>>>();
public RelationshipSchema(String json) throws CrudException {
JsonParser parser = new JsonParser();
try {
JsonObject root = parser.parse(json).getAsJsonObject();
JsonArray relationshipTypesArray = root.getAsJsonArray(SCHEMA_RELATIONSHIP_TYPES_ARRAY);
JsonArray relationsArray = root.getAsJsonArray(SCHEMA_RELATIONS_ARRAY);
//First load all the relationship-types
for (JsonElement item : relationshipTypesArray) {
JsonObject obj = item.getAsJsonObject();
String type = obj.get(SCHEMA_RELATIONSHIP_TYPE).getAsString();
HashMap<String, Class<?>> props = new HashMap<String, Class<?>>();
Set<Map.Entry<String, JsonElement>> entries = obj.get(SCHEMA_RELATIONSHIP_PROPERTIES)
.getAsJsonObject().entrySet();
for (Map.Entry<String, JsonElement> entry : entries) {
props.put(entry.getKey(), resolveClass(entry.getValue().getAsString()));
}
relationTypes.put(type, props);
}
for (JsonElement item : relationsArray) {
JsonObject obj = item.getAsJsonObject();
// Parse the Source/Taget nodeTypes
String relationType = obj.get(SCHEMA_RELATIONSHIP_TYPE).getAsString();
String key = obj.get(SCHEMA_SOURCE_NODE_TYPE).getAsString() + ":"
+ obj.get(SCHEMA_TARGET_NODE_TYPE).getAsString() + ":" + relationType;
if (!relationTypes.containsKey(relationType)) {
throw new CrudException(SCHEMA_RELATIONSHIP_TYPE + ": " + relationType + " not found",
Status.BAD_REQUEST);
}
relations.put(key, relationTypes.get(relationType));
}
} catch (Exception e) {
throw new CrudException(e.getMessage(), Status.BAD_REQUEST);
}
}
public HashMap<String, Class<?>> lookupRelation(String key) {
return this.relations.get(key);
}
public HashMap<String, Class<?>> lookupRelationType(String type) {
return this.relationTypes.get(type);
}
public boolean isValidType(String type) {
return relationTypes.containsKey(type);
}
private Class<?> resolveClass(String type) throws CrudException, ClassNotFoundException {
Class<?> clazz = Class.forName(type);
validateClassTypes(clazz);
return clazz;
}
private void validateClassTypes(Class<?> clazz) throws CrudException {
if (!clazz.isAssignableFrom(Integer.class) && !clazz.isAssignableFrom(Double.class)
&& !clazz.isAssignableFrom(Boolean.class) && !clazz.isAssignableFrom(String.class)) {
throw new CrudException("", Status.BAD_REQUEST);
}
}
}
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