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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* Copyright © 2017-2018 Amdocs
* ================================================================================
* 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.schema;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import javax.ws.rs.core.Response.Status;
import org.codehaus.jackson.map.ObjectMapper;
import org.onap.aai.edges.EdgeRule;
import org.onap.crud.exception.CrudException;
import com.google.common.collect.Multimap;
public class RelationshipSchema {
public static final String SCHEMA_SOURCE_NODE_TYPE = "from";
public static final String SCHEMA_TARGET_NODE_TYPE = "to";
public static final String SCHEMA_RELATIONSHIP_TYPE = "label";
public static final String SCHEMA_MULTIPLICITY_TYPE = "multiplicity";
public static final String SCHEMA_RULES_ARRAY = "rules";
private Map<String, Map<String, Class<?>>> relations = new HashMap<>();
/**
* Hashmap of valid relationship types along with properties.
*/
private Map<String, Map<String, Class<?>>> relationTypes = new HashMap<>();
private Map<String, EdgeRule> relationshipRules = new HashMap<>();
// A map storing the list of valid edge types for a source/target pair
private Map<String, Set<String>> edgeTypesForNodePair = new HashMap<>();
@SuppressWarnings("unchecked")
public RelationshipSchema(Multimap<String, EdgeRule> rules, String props) throws CrudException, IOException {
HashMap<String, String> properties = new ObjectMapper().readValue(props, HashMap.class);
// hold the true values of the edge rules by key - convert to java 8
for (EdgeRule rule : rules.values()) {
String key = buildRelation(rule.getFrom(), rule.getTo(), rule.getLabel());
relationshipRules.put(key, rule);
String nodePairKey = buildNodePairKey(rule.getFrom(), rule.getTo());
if (edgeTypesForNodePair.get(nodePairKey) == null) {
Set<String> typeSet = new HashSet<String>();
typeSet.add(rule.getLabel());
edgeTypesForNodePair.put(nodePairKey, typeSet);
}
else {
edgeTypesForNodePair.get(nodePairKey).add(rule.getLabel());
}
}
Map<String, Class<?>> edgeProps = properties.entrySet().stream().collect(Collectors.toMap(p -> p.getKey(), p -> {
try {
return resolveClass(p.getValue());
} catch (CrudException | ClassNotFoundException e) {
e.printStackTrace();
}
return null;
}));
rules.entries ().forEach ( (kv) -> {
relationTypes.put(kv.getValue ().getLabel (), edgeProps);
relations.put (buildRelation ( kv.getValue ().getFrom (), kv.getValue ().getTo (), kv.getValue ().getLabel ()), edgeProps);
});
}
public Map<String, Class<?>> lookupRelation(String key) {
return this.relations.get(key);
}
/**
* Extract the multiplicity type from the Edge rules
*
* @param key
* @return
* @throws CrudException
*/
public String lookupRelationMultiplicity(String key) throws CrudException {
EdgeRule edgeRule = relationshipRules.get(key);
if (edgeRule == null) {
throw new CrudException("Invalid source/target/relationship type: " + key, Status.BAD_REQUEST);
}
if (edgeRule.getMultiplicityRule() != null) {
return edgeRule.getMultiplicityRule().toString();
}
return null;
}
public Map<String, Class<?>> lookupRelationType(String type) {
return this.relationTypes.get(type);
}
public boolean isValidType(String type) {
return relationTypes.containsKey(type);
}
public Set<String> getValidRelationTypes(String source, String target) {
Set<String> typeList = edgeTypesForNodePair.get(buildNodePairKey(source, target));
if (typeList == null) {
return new HashSet<String>();
}
return typeList;
}
private String buildRelation(String source, String target, String relation) {
return source + ":" + target + ":" + relation;
}
private String buildNodePairKey(String source, String target) {
return source + ":" + target;
}
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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