[ONOS-4350] Inter Jar dependency implementation and code restructuring.

Change-Id: Iacac75e4187aed93ce1754c170a9c19707e5b8c3
diff --git a/utils/yangutils/datamodel/src/main/java/org/onosproject/yangutils/datamodel/YangEnum.java b/utils/yangutils/datamodel/src/main/java/org/onosproject/yangutils/datamodel/YangEnum.java
new file mode 100644
index 0000000..04ea232
--- /dev/null
+++ b/utils/yangutils/datamodel/src/main/java/org/onosproject/yangutils/datamodel/YangEnum.java
@@ -0,0 +1,240 @@
+/*
+ * Copyright 2016-present 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.yangutils.datamodel;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+import org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+import org.onosproject.yangutils.datamodel.utils.Parsable;
+import org.onosproject.yangutils.datamodel.utils.YangConstructType;
+
+/*-
+ * The "ENUM" statement, which is a sub-statement to the "type"
+ *  statement, MUST be present if the type is "enumeration".  It is
+ *  repeatedly used to specify each assigned name of an enumeration type.
+ *  It takes as an argument a string which is the assigned name.  The
+ *  string MUST NOT be empty and MUST NOT have any leading or trailing
+ *  whitespace characters.  The use of Unicode control codes SHOULD be
+ *  avoided.
+ *
+ *  The statement is optionally followed by a block of sub-statements that
+ *  holds detailed ENUM information.
+ *  All assigned names in an enumeration MUST be unique.
+ *
+ *  The ENUM's sub-statements
+ *
+ *                +--------------+---------+-------------+------------------+
+ *                | substatement | section | cardinality |data model mapping|
+ *                +--------------+---------+-------------+------------------+
+ *                | description  | 7.19.3  | 0..1        | - string         |
+ *                | reference    | 7.19.4  | 0..1        | - string         |
+ *                | status       | 7.19.2  | 0..1        | - YangStatus     |
+ *                | value        | 9.6.4.2 | 0..1        | - int            |
+ *                +--------------+---------+-------------+------------------+
+ */
+
+/**
+ * Represents the ENUM data type information.
+ */
+public class YangEnum implements YangCommonInfo, Parsable, Comparable<YangEnum>, Serializable {
+
+    private static final long serialVersionUID = 806201643L;
+
+    /**
+     * Named value for the ENUM.
+     */
+    private String namedValue;
+
+    /**
+     * Description of the ENUM value.
+     */
+    private String description;
+
+    /**
+     * Reference info of the ENUM value.
+     */
+    private String reference;
+
+    /**
+     * Status of the ENUM value.
+     */
+    private YangStatusType status;
+
+    /**
+     * Value of ENUM.
+     */
+    private int value;
+
+    /**
+     * Create a YANG ENUM.
+     */
+    public YangEnum() {
+
+    }
+
+    /**
+     * Returns the named value.
+     *
+     * @return the named value
+     */
+    public String getNamedValue() {
+        return namedValue;
+    }
+
+    /**
+     * Sets the named value.
+     *
+     * @param namedValue the named value to set
+     */
+    public void setNamedValue(String namedValue) {
+        this.namedValue = namedValue;
+    }
+
+    /**
+     * Returns the description.
+     *
+     * @return the description
+     */
+    @Override
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Sets the description.
+     *
+     * @param description set the description
+     */
+    @Override
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    /**
+     * Returns the textual reference.
+     *
+     * @return the reference
+     */
+    @Override
+    public String getReference() {
+        return reference;
+    }
+
+    /**
+     * Sets the textual reference.
+     *
+     * @param reference the reference to set
+     */
+    @Override
+    public void setReference(String reference) {
+        this.reference = reference;
+    }
+
+    /**
+     * Returns the status.
+     *
+     * @return the status
+     */
+    @Override
+    public YangStatusType getStatus() {
+        return status;
+    }
+
+    /**
+     * Sets the status.
+     *
+     * @param status the status to set
+     */
+    @Override
+    public void setStatus(YangStatusType status) {
+        this.status = status;
+    }
+
+    /**
+     * Returns the value.
+     *
+     * @return the value
+     */
+    public int getValue() {
+        return value;
+    }
+
+    /**
+     * Sets the value.
+     *
+     * @param value the value to set
+     */
+    public void setValue(int value) {
+        this.value = value;
+    }
+
+    /**
+     * Returns the type of the data.
+     *
+     * @return ParsedDataType returns ENUM_DATA
+     */
+    @Override
+    public YangConstructType getYangConstructType() {
+        return YangConstructType.ENUM_DATA;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof YangEnum) {
+            final YangEnum other = (YangEnum) obj;
+            return Objects.equals(namedValue, other.namedValue);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(namedValue);
+    }
+
+    /**
+     * Validates the data on entering the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules
+     */
+    @Override
+    public void validateDataOnEntry() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+    }
+
+    /**
+     * Validates the data on exiting the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules
+     */
+    @Override
+    public void validateDataOnExit() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+    }
+
+    @Override
+    public int compareTo(YangEnum otherEnum) {
+        if (namedValue.equals(otherEnum.getNamedValue())) {
+            return 0;
+        }
+        return new Integer(value).compareTo(otherEnum.getValue());
+    }
+}