[ONOS-2408]Data model and utility class about RFC 7047 (ovsdb protocol).
The whole lib of ovsdb provides the function of encode to jasonRPC and
decode to Pojo to consumer, the bussiness of coordination of
communication is implemented by adapter.
Change-Id: I4c35426273394c1699207e5a4f2e98cead59f1e1
diff --git a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/utils/TransValueUtil.java b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/utils/TransValueUtil.java
new file mode 100644
index 0000000..62b9232
--- /dev/null
+++ b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/utils/TransValueUtil.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onosproject.ovsdb.rfc.utils;
+
+import java.util.Map;
+import java.util.Set;
+
+import org.onosproject.ovsdb.rfc.notation.OvsdbMap;
+import org.onosproject.ovsdb.rfc.notation.OvsdbSet;
+import org.onosproject.ovsdb.rfc.notation.RefTableRow;
+import org.onosproject.ovsdb.rfc.notation.UUID;
+import org.onosproject.ovsdb.rfc.schema.type.AtomicColumnType;
+import org.onosproject.ovsdb.rfc.schema.type.BaseType;
+import org.onosproject.ovsdb.rfc.schema.type.BooleanBaseType;
+import org.onosproject.ovsdb.rfc.schema.type.ColumnType;
+import org.onosproject.ovsdb.rfc.schema.type.IntegerBaseType;
+import org.onosproject.ovsdb.rfc.schema.type.KeyValuedColumnType;
+import org.onosproject.ovsdb.rfc.schema.type.RealBaseType;
+import org.onosproject.ovsdb.rfc.schema.type.StringBaseType;
+import org.onosproject.ovsdb.rfc.schema.type.UuidBaseType;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+
+/**
+ * Object value utility class.
+ */
+public final class TransValueUtil {
+
+ /**
+ * Constructs a TransValueUtil object. Utility classes should not have a
+ * public or default constructor, otherwise it will compile failed.
+ * This class should not be instantiated.
+ */
+ private TransValueUtil() {
+ }
+
+ /**
+ * if the type is Set, convert into OvsdbSet, if Map, convert into OvsdbMap.
+ * @param value Object
+ * @return Object
+ */
+ public static Object getFormatData(Object value) {
+ if (value instanceof Map) {
+ return OvsdbMap.ovsdbMap((Map) value);
+ } else if (value instanceof Set) {
+ return OvsdbSet.ovsdbSet((Set) value);
+ } else {
+ return value;
+ }
+ }
+
+ /**
+ * Transform JsonNode to corresponding value.
+ * @param json the ColumnType JsonNode
+ * @param columnType AtomicColumnType or KeyValuedColumnType
+ * @return Object OvsdbMap or OvsdbSet
+ */
+ public static Object getValueFromJson(JsonNode json, ColumnType columnType) {
+ if (columnType instanceof AtomicColumnType) {
+ AtomicColumnType atoType = (AtomicColumnType) columnType;
+ return getValueFromAtoType(json, atoType);
+ } else if (columnType instanceof KeyValuedColumnType) {
+ KeyValuedColumnType kvType = (KeyValuedColumnType) columnType;
+ return getValueFromKvType(json, kvType);
+ }
+ return null;
+ }
+
+ // Convert AtomicColumnType JsonNode into OvsdbSet value
+ private static Object getValueFromAtoType(JsonNode json,
+ AtomicColumnType atoType) {
+ BaseType baseType = atoType.baseType();
+ // If "min" or "max" is not specified, If "min" is not 1 or "max" is not
+ // 1,
+ // or both, and "value" is not specified, the type is a set of scalar
+ // type "key".
+ // Refer to RFC 7047, Section 3.2 <type>.
+ if (atoType.min() != atoType.max()) {
+ Set set = Sets.newHashSet();
+ if (json.isArray()) {
+ if (json.size() == 2) {
+ if (json.get(0).isTextual()
+ && "set".equals(json.get(0).asText())) {
+ for (JsonNode node : json.get(1)) {
+ set.add(TransValueUtil.transToValue(node, baseType));
+ }
+ } else {
+ set.add(TransValueUtil.transToValue(json, baseType));
+ }
+ }
+ } else {
+ set.add(TransValueUtil.transToValue(json, baseType));
+ }
+ return OvsdbSet.ovsdbSet(set);
+ } else {
+ return TransValueUtil.transToValue(json, baseType);
+ }
+ }
+
+ // Convert KeyValuedColumnType JsonNode into OvsdbMap value
+ private static Object getValueFromKvType(JsonNode json,
+ KeyValuedColumnType kvType) {
+ if (json.isArray()) {
+ if (json.size() == 2) {
+ if (json.get(0).isTextual()
+ && "map".equals(json.get(0).asText())) {
+ Map map = Maps.newHashMap();
+ for (JsonNode pairNode : json.get(1)) {
+ if (pairNode.isArray() && json.size() == 2) {
+ Object key = TransValueUtil.transToValue(pairNode
+ .get(0), kvType.keyType());
+ Object value = TransValueUtil.transToValue(pairNode
+ .get(1), kvType.valueType());
+ map.put(key, value);
+ }
+ }
+ return OvsdbMap.ovsdbMap(map);
+ }
+ }
+ }
+ return null;
+ }
+
+ /**
+ * convert into value.
+ * @param valueNode the BaseType JsonNode
+ * @param baseType BooleanBaseType or IntegerBaseType or RealBaseType or
+ * StringBaseType or UuidBaseType
+ * @return Object the value of JsonNode
+ */
+ public static Object transToValue(JsonNode valueNode, BaseType baseType) {
+ if (baseType instanceof BooleanBaseType) {
+ return valueNode.asBoolean();
+ } else if (baseType instanceof IntegerBaseType) {
+ return valueNode.asInt();
+ } else if (baseType instanceof RealBaseType) {
+ return valueNode.asDouble();
+ } else if (baseType instanceof StringBaseType) {
+ return valueNode.asText();
+ } else if (baseType instanceof UuidBaseType) {
+ if (valueNode.isArray()) {
+ if (valueNode.size() == 2) {
+ if (valueNode.get(0).isTextual()
+ && "uuid".equals(valueNode.get(0).asText())
+ || "named-uuid".equals(valueNode.get(0).asText())) {
+ return UUID.uuid(valueNode.get(1).asText());
+ }
+ }
+ } else {
+ return new RefTableRow(((UuidBaseType) baseType).getRefTable(),
+ valueNode);
+ }
+ }
+ return null;
+ }
+}