1 files changed, 189 insertions, 0 deletions
diff --git a/aai-schema-abstraction/src/main/java/org/onap/aai/schemaif/oxm/RelationshipSchema.java b/aai-schema-abstraction/src/main/java/org/onap/aai/schemaif/oxm/RelationshipSchema.java
new file mode 100644
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+++ b/aai-schema-abstraction/src/main/java/org/onap/aai/schemaif/oxm/RelationshipSchema.java
@@ -0,0 +1,189 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2019 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2019 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=========================================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+package org.onap.aai.schemaif.oxm;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import org.codehaus.jackson.map.ObjectMapper;
+import org.onap.aai.cl.eelf.LoggerFactory;
+import org.onap.aai.edges.EdgeRule;
+import org.onap.aai.schemaif.SchemaProviderException;
+import org.onap.aai.schemaif.SchemaProviderMsgs;
+
+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_RULES_ARRAY = "rules";
+
+    private static org.onap.aai.cl.api.Logger logger =
+            LoggerFactory.getInstance().getLogger(RelationshipSchema.class.getName());
+
+    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<>();
+
+
+    public RelationshipSchema(Multimap<String, EdgeRule> rules, String props) throws SchemaProviderException, IOException {
+        HashMap<String, String> properties = new ObjectMapper().readValue(props, HashMap.class);
+
+        // hold the true values of the edge rules by key 
+        for (EdgeRule rule : rules.values()) {
+            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());
+            }
+
+            String key = buildRelation(rule.getFrom(), rule.getTo(), rule.getLabel());
+            relationshipRules.put(key, rule);
+        }
+
+        Map<String, Class<?>> edgeProps =
+                properties.entrySet().stream().collect(Collectors.toMap(p -> p.getKey(), p -> {
+                    try {
+                        return resolveClass(p.getValue());
+                    } catch (SchemaProviderException | ClassNotFoundException e) {
+                        logger.error(SchemaProviderMsgs.SCHEMA_LOAD_ERROR, "Error in RelationshipSchema: " + e);
+                    }
+                    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 EdgeRule lookupEdgeRule(String key) throws SchemaProviderException {
+        return relationshipRules.get(key);
+    }
+
+    public List<EdgeRule> lookupAdjacentEdges(String vertex) throws SchemaProviderException {
+        List<EdgeRule> edges = new ArrayList<EdgeRule>();
+        for (EdgeRule rule : relationshipRules.values()) {
+            if (rule.getFrom().equals(vertex) || rule.getTo().equals(vertex)) {
+                edges.add(rule);
+            }
+        }
+
+        return edges;
+    }
+
+    public RelationshipSchema(List<String> jsonStrings) throws SchemaProviderException, IOException {
+        String edgeRules = jsonStrings.get(0);
+        String props = jsonStrings.get(1);
+
+        HashMap<String, ArrayList<LinkedHashMap<String, String>>> rules =
+                new ObjectMapper().readValue(edgeRules, HashMap.class);
+        HashMap<String, String> properties = new ObjectMapper().readValue(props, HashMap.class);
+        Map<String, Class<?>> edgeProps =
+                properties.entrySet().stream().collect(Collectors.toMap(p -> p.getKey(), p -> {
+                    try {
+                        return resolveClass(p.getValue());
+                    } catch (SchemaProviderException | ClassNotFoundException e) {
+                        logger.error(SchemaProviderMsgs.SCHEMA_LOAD_ERROR, "Error in RelationshipSchema: " + e);
+                    }
+                    return null;
+                }));
+
+        rules.get(SCHEMA_RULES_ARRAY).forEach(l -> {
+            relationTypes.put(l.get(SCHEMA_RELATIONSHIP_TYPE), edgeProps);
+            relations.put(buildRelation(l.get(SCHEMA_SOURCE_NODE_TYPE), l.get(SCHEMA_TARGET_NODE_TYPE),
+                    l.get(SCHEMA_RELATIONSHIP_TYPE)), edgeProps);
+        });
+    }
+
+
+
+    public Map<String, Class<?>> lookupRelation(String key) {
+        return this.relations.get(key);
+    }
+
+    public Map<String, Class<?>> lookupRelationType(String type) {
+        return this.relationTypes.get(type);
+    }
+
+    public boolean isValidType(String type) {
+        return relationTypes.containsKey(type);
+    }
+
+
+    private String buildRelation(String source, String target, String relation) {
+        return source + ":" + target + ":" + relation;
+    }
+
+    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 buildNodePairKey(String source, String target) {
+        return source + ":" + target;
+    }
+
+
+    private Class<?> resolveClass(String type) throws SchemaProviderException, ClassNotFoundException {
+        Class<?> clazz = Class.forName(type);
+        validateClassTypes(clazz);
+        return clazz;
+    }
+
+    private void validateClassTypes(Class<?> clazz) throws SchemaProviderException {
+        if (!clazz.isAssignableFrom(Integer.class) && !clazz.isAssignableFrom(Double.class)
+                && !clazz.isAssignableFrom(Boolean.class) && !clazz.isAssignableFrom(String.class)) {
+            throw new SchemaProviderException("BAD_REQUEST");
+        }
+    }
+}
+
+