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;
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<>();
/**
*/
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 {
// 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 -> {
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);
}
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);