[ONOS-3892] implement YANG leaf data model

Change-Id: I996d4d3d60a0ad2142e173c6ba26c9cc355ccc80

+/*
+ * Copyright 2016 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 org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+import org.onosproject.yangutils.parser.Parsable;
+import org.onosproject.yangutils.parser.ParsableDataType;
+
+/*
+ *  Reference:RFC 6020.
+ *  The "import" statement makes definitions from one module available
+ *  inside another module or submodule.  The argument is the name of the
+ *  module to import, and the statement is followed by a block of
+ *  sub statements that holds detailed import information.
+ *  When a module is imported, the importing module may:
+ *  o  use any grouping and typedef defined at the top level in the
+ *     imported module or its submodules.
+ *
+ *  o  use any extension, feature, and identity defined in the imported
+ *     module or its submodules.
+ *
+ *  o  use any node in the imported module's schema tree in "must",
+ *     "path", and "when" statements, or as the target node in "augment"
+ *     and "deviation" statements.
+ *
+ *  The mandatory "prefix" sub statement assigns a prefix for the imported
+ *  module that is scoped to the importing module or submodule.  Multiple
+ *  "import" statements may be specified to import from different
+ *  modules.
+ *  When the optional "revision-date" sub-statement is present, any
+ *  typedef, grouping, extension, feature, and identity referenced by
+ *  definitions in the local module are taken from the specified revision
+ *  of the imported module.  It is an error if the specified revision of
+ *  the imported module does not exist.  If no "revision-date"
+ *  sub-statement is present, it is undefined from which revision of the
+ *  module they are taken.
+ *
+ *  Multiple revisions of the same module MUST NOT be imported.
+ *
+ *                       The import's Substatements
+ *
+ *                +---------------+---------+-------------+------------------+
+ *                | substatement  | section | cardinality |data model mapping|
+ *                +---------------+---------+-------------+------------------+
+ *                | prefix        | 7.1.4   | 1           | string           |
+ *                | revision-date | 7.1.5.1 | 0..1        | string           |
+ *                +---------------+---------+-------------+------------------+
+ */
+/**
+ * Maintains the information about the imported modules.
+ */
+public class YangImport implements Parsable {
+
+    /**
+     * Name of the module that is being imported.
+     */
+    private String name;
+
+    /**
+     * Prefix used to identify the entities from the imported module.
+     */
+    private String prefixId;
+
+    /**
+     * Reference:RFC 6020.
+     * The import's "revision-date" statement is used to specify the exact
+     * version of the module to import. The "revision-date" statement MUST match
+     * the most recent "revision" statement in the imported module. organization
+     * which defined the YANG module.
+     */
+    private String revision;
+
+    /**
+     * Default constructor.
+     */
+    public YangImport() {
+
+    }
+
+    /**
+     * Get the imported module name.
+     *
+     * @return the module name.
+     */
+    public String getModuleName() {
+        return name;
+    }
+
+    /**
+     * Set module name.
+     *
+     * @param moduleName the module name to set
+     */
+    public void setModuleName(String moduleName) {
+        name = moduleName;
+    }
+
+    /**
+     * Get the prefix used to identify the entities from the imported module.
+     *
+     * @return the prefix used to identify the entities from the imported
+     *         module.
+     */
+    public String getPrefixId() {
+        return prefixId;
+    }
+
+    /**
+     * Set prefix identifier.
+     *
+     * @param prefixId set the prefix identifier of the imported module.
+     */
+    public void setPrefixId(String prefixId) {
+        this.prefixId = prefixId;
+    }
+
+    /**
+     * Get the revision of the imported module.
+     *
+     * @return the revision of the imported module.
+     */
+    public String getRevision() {
+        return revision;
+    }
+
+    /**
+     * Set the revision of the imported module.
+     *
+     * @param rev set the revision of the imported module.
+     */
+    public void setRevision(String rev) {
+        revision = rev;
+    }
+
+    /**
+     * Returns the type of the parsed data.
+     *
+     * @return returns IMPORT_DATA
+     */
+    public ParsableDataType getParsableDataType() {
+        return ParsableDataType.IMPORT_DATA;
+    }
+
+    /**
+     * Validate the data on entering the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules
+     */
+    public void validateDataOnEntry() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+
+    /**
+     * Validate the data on exiting the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules
+     */
+    public void validateDataOnExit() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+}

+/*
+ * Copyright 2016 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 org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+import org.onosproject.yangutils.parser.Parsable;
+import org.onosproject.yangutils.parser.ParsableDataType;
+
+/*
+ * Reference:RFC 6020.
+ * The "include" statement is used to make content from a submodule
+ *  available to that submodule's parent module, or to another submodule
+ *  of that parent module.  The argument is an identifier that is the
+ *  name of the submodule to include.
+ *  The includes's Substatements
+ *
+ *                +---------------+---------+-------------+------------------+
+ *                | substatement  | section | cardinality |data model mapping|
+ *                +---------------+---------+-------------+------------------+
+ *                | revision-date | 7.1.5.1 | 0..1        | string           |
+ *                +---------------+---------+-------------+------------------+
+ */
+/**
+ * Maintains the information about the included sub-modules.
+ *
+ */
+public class YangInclude implements Parsable {
+
+    /**
+     * Name of the sub-module that is being included.
+     */
+    private String subModuleName;
+
+    /**
+     * The include's "revision-date" statement is used to specify the exact
+     * version of the submodule to import.
+     */
+    private String revision;
+
+    /**
+     * Default constructor.
+     */
+    public YangInclude() {
+    }
+
+    /**
+     * Get the name of included sub-module.
+     *
+     * @return the sub-module name
+     */
+    public String getSubModuleName() {
+        return subModuleName;
+    }
+
+    /**
+     * Set the name of included sub-modules.
+     *
+     * @param subModuleName the sub-module name to set
+     */
+    public void setSubModuleName(String subModuleName) {
+        this.subModuleName = subModuleName;
+    }
+
+    /**
+     * Get the revision.
+     *
+     * @return the revision
+     */
+    public String getRevision() {
+        return revision;
+    }
+
+    /**
+     * Set the revision.
+     *
+     * @param revision the revision to set
+     */
+    public void setRevision(String revision) {
+        this.revision = revision;
+    }
+
+    /**
+     * Returns the type of parsed data.
+     *
+     * @return returns INCLUDE_DATA
+     */
+    public ParsableDataType getParsableDataType() {
+        return ParsableDataType.INCLUDE_DATA;
+    }
+
+    /**
+     * Validate the data on entering the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules
+     */
+    public void validateDataOnEntry() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+
+    /**
+     * Validate the data on exiting the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules
+     */
+    public void validateDataOnExit() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+
+}

+/*
+ * Copyright 2016 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 org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+import org.onosproject.yangutils.parser.Parsable;
+import org.onosproject.yangutils.parser.ParsableDataType;
+
+/*
+ * Reference:RFC 6020.
+ *  The "leaf" statement is used to define a leaf node in the schema
+ *  tree.  It takes one argument, which is an identifier, followed by a
+ *  block of sub-statements that holds detailed leaf information.
+ *
+ *  A leaf node has a value, but no child nodes in the data tree.
+ *  Conceptually, the value in the data tree is always in the canonical
+ *  form.
+ *
+ *  A leaf node exists in zero or one instances in the data tree.
+ *
+ *  The "leaf" statement is used to define a scalar variable of a
+ *  particular built-in or derived type.
+ *
+ * The leaf's sub-statements
+ *
+ *       +--------------+---------+-------------+------------------+
+ *       | substatement | section | cardinality |data model mapping|
+ *       +--------------+---------+-------------+------------------+
+ *       | config       | 7.19.1  | 0..1        | - boolean        |
+ *       | default      | 7.6.4   | 0..1        | - TODO           |
+ *       | description  | 7.19.3  | 0..1        | - string         |
+ *       | if-feature   | 7.18.2  | 0..n        | - TODO           |
+ *       | mandatory    | 7.6.5   | 0..1        | - boolean        |
+ *       | must         | 7.5.3   | 0..n        | - TODO           |
+ *       | reference    | 7.19.4  | 0..1        | - string         |
+ *       | status       | 7.19.2  | 0..1        | - YangStatus     |
+ *       | type         | 7.6.3   | 1           | - YangType       |
+ *       | units        | 7.3.3   | 0..1        | - String         |
+ *       | when         | 7.19.5  | 0..1        | - TODO           |
+ *       +--------------+---------+-------------+------------------+
+ */
+/**
+ * Leaf data represented in YANG.
+ *
+ * @param <T> YANG data type
+ */
+public class YangLeaf<T> implements YangCommonInfo, Parsable {
+
+    /**
+     * Name of leaf.
+     */
+    private String name;
+
+    /**
+     * If the leaf is a config parameter.
+     */
+    private boolean isConfig;
+
+    /**
+     * description of leaf.
+     */
+    private String description;
+
+    /**
+     * If mandatory leaf.
+     */
+    private boolean isMandatory;
+
+    /**
+     * The textual reference to this leaf.
+     */
+    private String reference;
+
+    /**
+     * Status of leaf in YANG definition.
+     */
+    private YangStatusType status;
+
+    /**
+     * Textual units info.
+     */
+    private String units;
+
+    /**
+     * Data type of the leaf.
+     */
+    private YangType<T> dataType;
+
+    /**
+     * Default constructor to create a YANG leaf.
+     */
+    public YangLeaf() {
+    }
+
+    /**
+     * Get the name of leaf.
+     *
+     * @return the leaf name.
+     */
+    public String getLeafName() {
+        return name;
+    }
+
+    /**
+     * Set the name of leaf.
+     *
+     * @param leafName the leaf name to set.
+     */
+    public void setLeafName(String leafName) {
+        this.name = leafName;
+    }
+
+    /**
+     * Get the config flag.
+     *
+     * @return if config flag.
+     */
+    public boolean isConfig() {
+        return isConfig;
+    }
+
+    /**
+     * Set the config flag.
+     *
+     * @param isCfg the flag value to set.
+     */
+    public void setConfig(boolean isCfg) {
+        isConfig = isCfg;
+    }
+
+    /**
+     * Get the description.
+     *
+     * @return the description.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Set the description.
+     *
+     * @param description set the description.
+     */
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    /**
+     * Get if the leaf is mandatory.
+     *
+     * @return if leaf is mandatory.
+     */
+    public boolean isMandatory() {
+        return isMandatory;
+    }
+
+    /**
+     * Set if the leaf is mandatory.
+     *
+     * @param isReq if the leaf is mandatory
+     */
+    public void setMandatory(boolean isReq) {
+        isMandatory = isReq;
+    }
+
+    /**
+     * Get the textual reference.
+     *
+     * @return the reference.
+     */
+    public String getReference() {
+        return reference;
+    }
+
+    /**
+     * Set the textual reference.
+     *
+     * @param reference the reference to set.
+     */
+    public void setReference(String reference) {
+        this.reference = reference;
+    }
+
+    /**
+     * Get the status.
+     *
+     * @return the status.
+     */
+    public YangStatusType getStatus() {
+        return status;
+    }
+
+    /**
+     * Set the status.
+     *
+     * @param status the status to set.
+     */
+    public void setStatus(YangStatusType status) {
+        this.status = status;
+    }
+
+    /**
+     * Get the units.
+     *
+     * @return the units.
+     */
+    public String getUnits() {
+        return units;
+    }
+
+    /**
+     * Set the units.
+     *
+     * @param units the units to set.
+     */
+    public void setUnits(String units) {
+        this.units = units;
+    }
+
+    /**
+     * Get the data type.
+     *
+     * @return the data type.
+     */
+    public YangType<T> getDataType() {
+        return dataType;
+    }
+
+    /**
+     * Set the data type.
+     *
+     * @param dataType the data type to set.
+     */
+    public void setDataType(YangType<T> dataType) {
+        this.dataType = dataType;
+    }
+
+    /**
+     * Returns the type of the parsed data.
+     *
+     * @return returns LEAF_DATA.
+     */
+    public ParsableDataType getParsableDataType() {
+        return ParsableDataType.LEAF_DATA;
+    }
+
+    /**
+     * Validate the data on entering the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules.
+     */
+    public void validateDataOnEntry() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+
+    /**
+     * Validate the data on exiting the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules.
+     */
+    public void validateDataOnExit() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+}

+/*
+ * Copyright 2016 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 org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+import org.onosproject.yangutils.parser.Parsable;
+import org.onosproject.yangutils.parser.ParsableDataType;
+
+/*
+ *  Reference:RFC 6020.
+ *  Where the "leaf" statement is used to define a simple scalar variable
+ *  of a particular type, the "leaf-list" statement is used to define an
+ *  array of a particular type.  The "leaf-list" statement takes one
+ *  argument, which is an identifier, followed by a block of
+ *  sub-statements that holds detailed leaf-list information.
+ *
+ *  The values in a leaf-list MUST be unique.
+ *
+ * The leaf-list's sub-statements
+ *
+ *                +--------------+---------+-------------+------------------+
+ *                | substatement | section | cardinality |data model mapping|
+ *                +--------------+---------+-------------+------------------+
+ *                | config       | 7.19.1  | 0..1        | -boolean         |
+ *                | description  | 7.19.3  | 0..1        | -string          |
+ *                | if-feature   | 7.18.2  | 0..n        | -TODO            |
+ *                | max-elements | 7.7.4   | 0..1        | -int             |
+ *                | min-elements | 7.7.3   | 0..1        | -int             |
+ *                | must         | 7.5.3   | 0..n        | -TODO            |
+ *                | ordered-by   | 7.7.5   | 0..1        | -TODO            |
+ *                | reference    | 7.19.4  | 0..1        | -string          |
+ *                | status       | 7.19.2  | 0..1        | -YangStatus      |
+ *                | type         | 7.4     | 1           | -YangType        |
+ *                | units        | 7.3.3   | 0..1        | -string          |
+ *                | when         | 7.19.5  | 0..1        | -TODO            |
+ *                +--------------+---------+-------------+------------------+
+ */
+/**
+ * Leaf-list data represented in YANG.
+ *
+ * @param <T> YANG data type
+ */
+public class YangLeafList<T> implements YangCommonInfo, Parsable {
+
+    /**
+     * Name of leaf-list.
+     */
+    private String name;
+
+    /**
+     * If the leaf-list is a config parameter.
+     */
+    private boolean isConfig;
+
+    /**
+     * Description of leaf-list.
+     */
+    private String description;
+
+    /**
+     * Reference:RFC 6020.
+     * The "max-elements" statement, which is optional, takes as an argument a
+     * positive integer or the string "unbounded", which puts a constraint on
+     * valid list entries. A valid leaf-list or list always has at most
+     * max-elements entries.
+     *
+     * If no "max-elements" statement is present, it defaults to "unbounded".
+     */
+    private int maxElelements;
+
+    /**
+     * Reference:RFC 6020.
+     * The "min-elements" statement, which is optional, takes as an argument a
+     * non-negative integer that puts a constraint on valid list entries. A
+     * valid leaf-list or list MUST have at least min-elements entries.
+     *
+     * If no "min-elements" statement is present, it defaults to zero.
+     *
+     * The behavior of the constraint depends on the type of the leaf-list's or
+     * list's closest ancestor node in the schema tree that is not a non-
+     * presence container:
+     *
+     * o If this ancestor is a case node, the constraint is enforced if any
+     * other node from the case exists.
+     *
+     * o Otherwise, it is enforced if the ancestor node exists.
+     */
+    private int minElements;
+
+    /**
+     * The textual reference to this leaf-list.
+     */
+    private String reference;
+
+    /**
+     * Status of the leaf-list in the YANG definition.
+     */
+    private YangStatusType status;
+
+    /**
+     * Textual units.
+     */
+    private String units;
+
+    /**
+     * Data type of leaf-list.
+     */
+    private YangType<T> dataType;
+
+    /**
+     * Default Constructor to create a YANG leaf-list.
+     */
+    public YangLeafList() {
+    }
+
+    /**
+     * Get the leaf-list name.
+     *
+     * @return the leaf-list name.
+     */
+    public String getLeafName() {
+        return name;
+    }
+
+    /**
+     * Set the leaf-list name.
+     *
+     * @param leafListName the leaf-list name to set.
+     */
+    public void setLeafName(String leafListName) {
+        this.name = leafListName;
+    }
+
+    /**
+     * Get the config flag.
+     *
+     * @return the config flag.
+     */
+    public boolean isConfig() {
+        return isConfig;
+    }
+
+    /**
+     * Set the config flag.
+     *
+     * @param isCfg the config flag.
+     */
+    public void setConfig(boolean isCfg) {
+        isConfig = isCfg;
+    }
+
+    /**
+     * Get the description.
+     *
+     * @return the description.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Set the description.
+     *
+     * @param description set the description.
+     */
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    /**
+     * Get the max elements no.
+     *
+     * @return the max elements no.
+     */
+    public int getMaxElelements() {
+        return maxElelements;
+    }
+
+    /**
+     * Set the max elements no.
+     *
+     * @param maxElelements max elements no.
+     */
+    public void setMaxElelements(int maxElelements) {
+        this.maxElelements = maxElelements;
+    }
+
+    /**
+     * Get the min elements no.
+     *
+     * @return the min elements no.
+     */
+    public int getMinElements() {
+        return minElements;
+    }
+
+    /**
+     * Set the min elements no.
+     *
+     * @param minElements the min elements no.
+     */
+    public void setMinElements(int minElements) {
+        this.minElements = minElements;
+    }
+
+    /**
+     * Get the textual reference.
+     *
+     * @return the reference.
+     */
+    public String getReference() {
+        return reference;
+    }
+
+    /**
+     * Set the textual reference.
+     *
+     * @param reference the reference to set.
+     */
+    public void setReference(String reference) {
+        this.reference = reference;
+    }
+
+    /**
+     * Get the status.
+     *
+     * @return the status.
+     */
+    public YangStatusType getStatus() {
+        return status;
+    }
+
+    /**
+     * Set the status.
+     *
+     * @param status the status to set.
+     */
+    public void setStatus(YangStatusType status) {
+        this.status = status;
+    }
+
+    /**
+     * Get the units.
+     *
+     * @return the units.
+     */
+    public String getUnits() {
+        return units;
+    }
+
+    /**
+     * Set the units.
+     *
+     * @param units the units to set.
+     */
+    public void setUnits(String units) {
+        this.units = units;
+    }
+
+    /**
+     * Get the data type.
+     *
+     * @return the data type.
+     */
+    public YangType<T> getDataType() {
+        return dataType;
+    }
+
+    /**
+     * Set the data type.
+     *
+     * @param dataType the data type to set.
+     */
+    public void setDataType(YangType<T> dataType) {
+        this.dataType = dataType;
+    }
+
+    /**
+     * Returns the type of the parsed data.
+     *
+     * @return returns LEAF_LIST_DATA.
+     */
+    public ParsableDataType getParsableDataType() {
+        return ParsableDataType.LEAF_LIST_DATA;
+    }
+
+    /**
+     * Validate the data on entering the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules.
+     */
+    public void validateDataOnEntry() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+
+    /**
+     * Validate the data on exiting the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules.
+     */
+    public void validateDataOnExit() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+}

+/*Copyright 2016.year 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.util.List;
+
+/**
+ * Abstraction of atomic configurable/status entity. It is used to abstract the
+ * data holders of leaf or leaf list. Used in leaves parsing or attribute code
+ * generation.
+ */
+public interface YangLeavesHolder {
+
+    /**
+     * Get the list of leaves from data holder like container / list.
+     *
+     * @return the list of leaves.
+     */
+    @SuppressWarnings("rawtypes")
+    public List<YangLeaf> getListOfLeaf();
+
+    /**
+     * Add a leaf in data holder like container / list.
+     *
+     * @param leaf the leaf to be added.
+     */
+    void addLeaf(YangLeaf<?> leaf);
+
+    /**
+     * Get the list of leaf-list from data holder like container / list.
+     *
+     * @return the list of leaf-list.
+     */
+    @SuppressWarnings("rawtypes")
+    List<YangLeafList> getListOfLeafList();
+
+    /**
+     * Add a leaf-list in data holder like container / list.
+     *
+     * @param leafList the leaf-list to be added.
+     */
+    void addLeafList(YangLeafList<?> leafList);
+}