Merge from development repository.
[controller.git] / opendaylight / sal / yang-prototype / code-generator / yang-model-parser-impl / src / main / java / org / opendaylight / controller / yang / model / parser / impl / YangModelParserListenerImpl.java
diff --git a/opendaylight/sal/yang-prototype/code-generator/yang-model-parser-impl/src/main/java/org/opendaylight/controller/yang/model/parser/impl/YangModelParserListenerImpl.java b/opendaylight/sal/yang-prototype/code-generator/yang-model-parser-impl/src/main/java/org/opendaylight/controller/yang/model/parser/impl/YangModelParserListenerImpl.java
new file mode 100644 (file)
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+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.yang.model.parser.impl;
+
+import static org.opendaylight.controller.yang.model.parser.util.YangModelBuilderUtil.*;
+
+import java.net.URI;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Collections;
+import java.util.Date;
+import java.util.List;
+import java.util.Stack;
+
+import org.antlr.v4.runtime.tree.ParseTree;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Contact_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Container_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Description_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Deviate_add_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Deviate_delete_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Deviate_not_supported_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Deviate_replace_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Import_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Key_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Leaf_list_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Leaf_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.List_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Module_header_stmtsContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Namespace_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Ordered_by_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Organization_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Prefix_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Presence_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Reference_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Revision_date_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Revision_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Revision_stmtsContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Status_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Type_body_stmtsContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParser.Yang_version_stmtContext;
+import org.opendaylight.controller.antlrv4.code.gen.YangParserBaseListener;
+import org.opendaylight.controller.model.util.YangTypesConverter;
+import org.opendaylight.controller.yang.common.QName;
+import org.opendaylight.controller.yang.model.api.Status;
+import org.opendaylight.controller.yang.model.api.TypeDefinition;
+import org.opendaylight.controller.yang.model.parser.builder.api.AugmentationSchemaBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.api.GroupingBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.ContainerSchemaNodeBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.DeviationBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.ExtensionBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.FeatureBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.LeafListSchemaNodeBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.LeafSchemaNodeBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.ListSchemaNodeBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.ModuleBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.NotificationBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.RpcDefinitionBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.TypedefBuilder;
+import org.opendaylight.controller.yang.model.parser.builder.impl.UnknownSchemaNodeBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+final class YangModelParserListenerImpl extends YangParserBaseListener {
+
+    private static final Logger logger = LoggerFactory
+            .getLogger(YangModelParserListenerImpl.class);
+
+    private ModuleBuilder moduleBuilder;
+
+    private String moduleName;
+    private URI namespace;
+    private String yangModelPrefix;
+    private Date revision;
+
+    private final DateFormat simpleDateFormat = new SimpleDateFormat(
+            "yyyy-mm-dd");
+    private final Stack<String> actualPath = new Stack<String>();
+
+
+    @Override
+    public void enterModule_stmt(YangParser.Module_stmtContext ctx) {
+        moduleName = stringFromNode(ctx);
+        actualPath.push(moduleName);
+        moduleBuilder = new ModuleBuilder(moduleName);
+
+        String description = null;
+        String reference = null;
+
+        for (int i = 0; i < ctx.getChildCount(); i++) {
+            ParseTree child = ctx.getChild(i);
+            if (child instanceof Description_stmtContext) {
+                description = stringFromNode(child);
+            } else if (child instanceof Reference_stmtContext) {
+                reference = stringFromNode(child);
+            } else {
+                if (description != null && reference != null) {
+                    break;
+                }
+            }
+        }
+        moduleBuilder.setDescription(description);
+        moduleBuilder.setReference(reference);
+    }
+
+    @Override
+    public void exitModule_stmt(YangParser.Module_stmtContext ctx) {
+        final String moduleName = actualPath.pop();
+        logger.debug("Exiting module " + moduleName);
+    }
+
+    @Override
+    public void enterModule_header_stmts(final Module_header_stmtsContext ctx) {
+        super.enterModule_header_stmts(ctx);
+
+        for (int i = 0; i < ctx.getChildCount(); ++i) {
+            final ParseTree treeNode = ctx.getChild(i);
+            if (treeNode instanceof Namespace_stmtContext) {
+                final String namespaceStr = stringFromNode(treeNode);
+                namespace = URI.create(namespaceStr);
+                moduleBuilder.setNamespace(namespace);
+            } else if (treeNode instanceof Prefix_stmtContext) {
+                yangModelPrefix = stringFromNode(treeNode);
+                moduleBuilder.setPrefix(yangModelPrefix);
+            } else if (treeNode instanceof Yang_version_stmtContext) {
+                final String yangVersion = stringFromNode(treeNode);
+                moduleBuilder.setYangVersion(yangVersion);
+            }
+        }
+    }
+
+    @Override
+    public void enterMeta_stmts(YangParser.Meta_stmtsContext ctx) {
+        for (int i = 0; i < ctx.getChildCount(); i++) {
+            ParseTree child = ctx.getChild(i);
+            if (child instanceof Organization_stmtContext) {
+                final String organization = stringFromNode(child);
+                moduleBuilder.setOrganization(organization);
+            } else if (child instanceof Contact_stmtContext) {
+                final String contact = stringFromNode(child);
+                moduleBuilder.setContact(contact);
+            } else if (child instanceof Description_stmtContext) {
+                final String description = stringFromNode(child);
+                moduleBuilder.setDescription(description);
+            } else if (child instanceof Reference_stmtContext) {
+                final String reference = stringFromNode(child);
+                moduleBuilder.setReference(reference);
+            }
+        }
+    }
+
+    @Override
+    public void exitSubmodule_header_stmts(
+            YangParser.Submodule_header_stmtsContext ctx) {
+        final String submodule = actualPath.pop();
+        logger.debug("exiting submodule " + submodule);
+    }
+
+    @Override
+    public void enterRevision_stmts(Revision_stmtsContext ctx) {
+        for (int i = 0; i < ctx.getChildCount(); ++i) {
+            final ParseTree treeNode = ctx.getChild(i);
+            if (treeNode instanceof Revision_stmtContext) {
+                final String revisionDateStr = stringFromNode(treeNode);
+                try {
+                    revision = simpleDateFormat.parse(revisionDateStr);
+                    moduleBuilder.setRevision(revision);
+                } catch (ParseException e) {
+                    final String message = "Failed to parse revision string: "+ revisionDateStr;
+                    logger.warn(message);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void enterImport_stmt(Import_stmtContext ctx) {
+        super.enterImport_stmt(ctx);
+
+        final String importName = stringFromNode(ctx);
+        String importPrefix = null;
+        Date importRevision = null;
+
+        for (int i = 0; i < ctx.getChildCount(); ++i) {
+            final ParseTree treeNode = ctx.getChild(i);
+            if (treeNode instanceof Prefix_stmtContext) {
+                importPrefix = stringFromNode(treeNode);
+            }
+            if (treeNode instanceof Revision_date_stmtContext) {
+                String importRevisionStr = stringFromNode(treeNode);
+                try {
+                    importRevision = simpleDateFormat.parse(importRevisionStr);
+                } catch(ParseException e) {
+                    logger.warn("Failed to parse import revision-date: "+ importRevisionStr);
+                }
+            }
+        }
+        moduleBuilder.addModuleImport(importName, importRevision, importPrefix);
+    }
+
+    @Override
+    public void enterAugment_stmt(YangParser.Augment_stmtContext ctx) {
+        final String augmentPath = stringFromNode(ctx);
+        AugmentationSchemaBuilder builder = moduleBuilder.addAugment(
+                augmentPath, getActualPath());
+        updatePath(augmentPath);
+
+        for (int i = 0; i < ctx.getChildCount(); i++) {
+            ParseTree child = ctx.getChild(i);
+            if (child instanceof Description_stmtContext) {
+                String desc = stringFromNode(child);
+                builder.setDescription(desc);
+            } else if (child instanceof Reference_stmtContext) {
+                String ref = stringFromNode(child);
+                builder.setReference(ref);
+            } else if (child instanceof Status_stmtContext) {
+                Status status = parseStatus((Status_stmtContext) child);
+                builder.setStatus(status);
+            }
+        }
+    }
+
+    @Override
+    public void exitAugment_stmt(YangParser.Augment_stmtContext ctx) {
+        final String augment = actualPath.pop();
+        logger.debug("exiting augment " + augment);
+    }
+
+    @Override
+    public void enterExtension_stmt(YangParser.Extension_stmtContext ctx) {
+        String argument = stringFromNode(ctx);
+        QName qname = new QName(namespace, revision, yangModelPrefix, argument);
+        ExtensionBuilder builder = moduleBuilder.addExtension(qname);
+        parseSchemaNodeArgs(ctx, builder);
+    }
+
+    @Override
+    public void enterTypedef_stmt(YangParser.Typedef_stmtContext ctx) {
+        String typedefName = stringFromNode(ctx);
+        QName typedefQName = new QName(namespace, revision, yangModelPrefix,
+                typedefName);
+        TypedefBuilder builder = moduleBuilder.addTypedef(typedefQName,
+                getActualPath());
+        updatePath(typedefName);
+
+        builder.setPath(createActualSchemaPath(actualPath, namespace, revision,
+                yangModelPrefix));
+        parseSchemaNodeArgs(ctx, builder);
+        builder.setUnits(parseUnits(ctx));
+    }
+
+    @Override
+    public void exitTypedef_stmt(YangParser.Typedef_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterType_stmt(YangParser.Type_stmtContext ctx) {
+        String typeName = stringFromNode(ctx);
+        QName typeQName;
+        if (typeName.contains(":")) {
+            String[] splittedName = typeName.split(":");
+            String prefix = splittedName[0];
+            String name = splittedName[1];
+            if (prefix.equals(yangModelPrefix)) {
+                typeQName = new QName(namespace, revision, prefix, name);
+            } else {
+                typeQName = new QName(null, null, prefix, name);
+            }
+        } else {
+            typeQName = new QName(namespace, revision, yangModelPrefix,
+                    typeName);
+        }
+
+        TypeDefinition<?> type = null;
+        Type_body_stmtsContext typeBody = null;
+        for (int i = 0; i < ctx.getChildCount(); i++) {
+            if (ctx.getChild(i) instanceof Type_body_stmtsContext) {
+                typeBody = (Type_body_stmtsContext) ctx.getChild(i);
+                break;
+            }
+        }
+
+        // if this is base yang type...
+        if(YangTypesConverter.isBaseYangType(typeName)) {
+            if (typeBody == null) {
+                // if there are no constraints, just grab default base yang type
+                type = YangTypesConverter.javaTypeForBaseYangType(typeName);
+            } else {
+                type = parseTypeBody(typeName, typeBody, actualPath, namespace, revision, yangModelPrefix);
+            }
+        } else {
+            type = parseUnknownTypeBody(typeQName, typeBody);
+            // mark parent node of this type statement as dirty
+            moduleBuilder.addDirtyNode(actualPath);
+        }
+
+        moduleBuilder.setType(type, actualPath);
+        updatePath(typeName);
+    }
+
+    @Override
+    public void exitType_stmt(YangParser.Type_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterGrouping_stmt(YangParser.Grouping_stmtContext ctx) {
+        final String groupName = stringFromNode(ctx);
+        QName groupQName = new QName(namespace, revision, yangModelPrefix,
+                groupName);
+        GroupingBuilder groupBuilder = moduleBuilder.addGrouping(groupQName,
+                actualPath);
+        updatePath("grouping");
+        updatePath(groupName);
+        parseSchemaNodeArgs(ctx, groupBuilder);
+    }
+
+    @Override
+    public void exitGrouping_stmt(YangParser.Grouping_stmtContext ctx) {
+        String actContainer = actualPath.pop();
+        actContainer += "-" + actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterContainer_stmt(Container_stmtContext ctx) {
+        super.enterContainer_stmt(ctx);
+        String containerName = stringFromNode(ctx);
+        QName containerQName = new QName(namespace, revision, yangModelPrefix,
+                containerName);
+        ContainerSchemaNodeBuilder containerBuilder = moduleBuilder
+                .addContainerNode(containerQName, actualPath);
+        updatePath(containerName);
+
+        containerBuilder.setPath(createActualSchemaPath(actualPath, namespace, revision, yangModelPrefix));
+        parseSchemaNodeArgs(ctx, containerBuilder);
+        parseConstraints(ctx, containerBuilder.getConstraintsBuilder());
+
+        for (int i = 0; i < ctx.getChildCount(); ++i) {
+            final ParseTree childNode = ctx.getChild(i);
+            if (childNode instanceof Presence_stmtContext) {
+                containerBuilder.setPresenceContainer(true);
+                break;
+            }
+        }
+    }
+
+    @Override
+    public void exitContainer_stmt(Container_stmtContext ctx) {
+        super.exitContainer_stmt(ctx);
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterLeaf_stmt(Leaf_stmtContext ctx) {
+        super.enterLeaf_stmt(ctx);
+
+        final String leafName = stringFromNode(ctx);
+        QName leafQName = new QName(namespace, revision, yangModelPrefix,
+                leafName);
+        LeafSchemaNodeBuilder leafBuilder = moduleBuilder.addLeafNode(
+                leafQName, actualPath);
+        updatePath(leafName);
+
+        leafBuilder.setPath(createActualSchemaPath(actualPath, namespace, revision, yangModelPrefix));
+        parseSchemaNodeArgs(ctx, leafBuilder);
+        parseConstraints(ctx, leafBuilder.getConstraintsBuilder());
+    }
+
+    @Override
+    public void exitLeaf_stmt(YangParser.Leaf_stmtContext ctx) {
+        final String actLeaf = actualPath.pop();
+        logger.debug("exiting " + actLeaf);
+    }
+
+    @Override
+    public void enterUses_stmt(YangParser.Uses_stmtContext ctx) {
+        final String groupingPathStr = stringFromNode(ctx);
+        moduleBuilder.addUsesNode(groupingPathStr, actualPath);
+        updatePath(groupingPathStr);
+    }
+
+    @Override
+    public void exitUses_stmt(YangParser.Uses_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterLeaf_list_stmt(Leaf_list_stmtContext ctx) {
+        super.enterLeaf_list_stmt(ctx);
+
+        final String leafListName = stringFromNode(ctx);
+        QName leafListQName = new QName(namespace, revision, yangModelPrefix,
+                leafListName);
+        LeafListSchemaNodeBuilder leafListBuilder = moduleBuilder
+                .addLeafListNode(leafListQName, actualPath);
+        updatePath(leafListName);
+
+        parseSchemaNodeArgs(ctx, leafListBuilder);
+        parseConstraints(ctx, leafListBuilder.getConstraintsBuilder());
+
+        for (int i = 0; i < ctx.getChildCount(); ++i) {
+            final ParseTree childNode = ctx.getChild(i);
+            if (childNode instanceof Ordered_by_stmtContext) {
+                final Ordered_by_stmtContext orderedBy = (Ordered_by_stmtContext) childNode;
+                final boolean userOrdered = parseUserOrdered(orderedBy);
+                leafListBuilder.setUserOrdered(userOrdered);
+                break;
+            }
+        }
+    }
+
+    @Override
+    public void exitLeaf_list_stmt(YangParser.Leaf_list_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterList_stmt(List_stmtContext ctx) {
+        super.enterList_stmt(ctx);
+
+        final String containerName = stringFromNode(ctx);
+        QName containerQName = new QName(namespace, revision, yangModelPrefix,
+                containerName);
+        ListSchemaNodeBuilder listBuilder = moduleBuilder.addListNode(
+                containerQName, actualPath);
+        updatePath(containerName);
+
+        listBuilder.setPath(createActualSchemaPath(actualPath, namespace, revision, yangModelPrefix));
+        parseSchemaNodeArgs(ctx, listBuilder);
+        parseConstraints(ctx, listBuilder.getConstraintsBuilder());
+
+        String keyDefinition = "";
+        for (int i = 0; i < ctx.getChildCount(); ++i) {
+            ParseTree childNode = ctx.getChild(i);
+            if (childNode instanceof Ordered_by_stmtContext) {
+                final Ordered_by_stmtContext orderedBy = (Ordered_by_stmtContext) childNode;
+                final boolean userOrdered = parseUserOrdered(orderedBy);
+                listBuilder.setUserOrdered(userOrdered);
+            } else if (childNode instanceof Key_stmtContext) {
+                keyDefinition = stringFromNode(childNode);
+                List<QName> key = createListKey(keyDefinition, namespace,
+                        revision, yangModelPrefix);
+                listBuilder.setKeyDefinition(key);
+            }
+        }
+    }
+
+    @Override
+    public void exitList_stmt(List_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterNotification_stmt(YangParser.Notification_stmtContext ctx) {
+        final String notificationName = stringFromNode(ctx);
+        QName notificationQName = new QName(namespace, revision,
+                yangModelPrefix, notificationName);
+        NotificationBuilder notificationBuilder = moduleBuilder
+                .addNotification(notificationQName, actualPath);
+        updatePath(notificationName);
+
+        notificationBuilder.setPath(createActualSchemaPath(actualPath, namespace,
+                revision, yangModelPrefix));
+        parseSchemaNodeArgs(ctx, notificationBuilder);
+    }
+
+    @Override
+    public void exitNotification_stmt(YangParser.Notification_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    // Unknown types
+    @Override
+    public void enterIdentifier_stmt(YangParser.Identifier_stmtContext ctx) {
+        String name = stringFromNode(ctx);
+
+        QName qname;
+        if(name != null) {
+            String[] splittedName = name.split(":");
+            if(splittedName.length == 2) {
+                qname = new QName(null, null, splittedName[0], splittedName[1]);
+            } else {
+                qname = new QName(namespace, revision, yangModelPrefix, splittedName[0]);
+            }
+        } else {
+            qname = new QName(namespace, revision, yangModelPrefix, name);
+        }
+
+        UnknownSchemaNodeBuilder builder = moduleBuilder.addUnknownSchemaNode(qname, getActualPath());
+        updatePath(name);
+
+        builder.setPath(createActualSchemaPath(actualPath, namespace, revision, yangModelPrefix));
+        parseSchemaNodeArgs(ctx, builder);
+    }
+
+    @Override
+    public void exitIdentifier_stmt(YangParser.Identifier_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterRpc_stmt(YangParser.Rpc_stmtContext ctx) {
+        final String rpcName = stringFromNode(ctx);
+        QName rpcQName = new QName(namespace, revision, yangModelPrefix,
+                rpcName);
+        RpcDefinitionBuilder rpcBuilder = moduleBuilder.addRpc(rpcQName,
+                actualPath);
+        updatePath(rpcName);
+
+        rpcBuilder.setPath(createActualSchemaPath(actualPath, namespace, revision,
+                yangModelPrefix));
+        parseSchemaNodeArgs(ctx, rpcBuilder);
+    }
+
+    @Override
+    public void exitRpc_stmt(YangParser.Rpc_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterInput_stmt(YangParser.Input_stmtContext ctx) {
+        updatePath("input");
+    }
+
+    @Override
+    public void exitInput_stmt(YangParser.Input_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterOutput_stmt(YangParser.Output_stmtContext ctx) {
+        updatePath("output");
+    }
+
+    @Override
+    public void exitOutput_stmt(YangParser.Output_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterFeature_stmt(YangParser.Feature_stmtContext ctx) {
+        final String featureName = stringFromNode(ctx);
+        QName featureQName = new QName(namespace, revision, yangModelPrefix,
+                featureName);
+        FeatureBuilder featureBuilder = moduleBuilder.addFeature(featureQName,
+                actualPath);
+        updatePath(featureName);
+
+        featureBuilder.setPath(createActualSchemaPath(actualPath, namespace,
+                revision, yangModelPrefix));
+        parseSchemaNodeArgs(ctx, featureBuilder);
+    }
+
+    @Override
+    public void exitFeature_stmt(YangParser.Feature_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterDeviation_stmt(YangParser.Deviation_stmtContext ctx) {
+        final String targetPath = stringFromNode(ctx);
+        String reference = null;
+        String deviate = null;
+        DeviationBuilder builder = moduleBuilder.addDeviation(targetPath);
+        updatePath(targetPath);
+
+        for (int i = 0; i < ctx.getChildCount(); i++) {
+            ParseTree child = ctx.getChild(i);
+            if (child instanceof Reference_stmtContext) {
+                reference = stringFromNode(child);
+            } else if (child instanceof Deviate_not_supported_stmtContext) {
+                deviate = stringFromNode(child);
+            } else if (child instanceof Deviate_add_stmtContext) {
+                deviate = stringFromNode(child);
+            } else if (child instanceof Deviate_replace_stmtContext) {
+                deviate = stringFromNode(child);
+            } else if (child instanceof Deviate_delete_stmtContext) {
+                deviate = stringFromNode(child);
+            }
+        }
+        builder.setReference(reference);
+        builder.setDeviate(deviate);
+    }
+
+    @Override
+    public void exitDeviation_stmt(YangParser.Deviation_stmtContext ctx) {
+        final String actContainer = actualPath.pop();
+        logger.debug("exiting " + actContainer);
+    }
+
+    @Override
+    public void enterConfig_stmt(YangParser.Config_stmtContext ctx) {
+        boolean configuration = parseConfig(ctx);
+        moduleBuilder.addConfiguration(configuration, actualPath);
+    }
+
+    public ModuleBuilder getModuleBuilder() {
+        return moduleBuilder;
+    }
+
+    private void updatePath(String containerName) {
+        actualPath.push(containerName);
+    }
+
+    private List<String> getActualPath() {
+        return Collections.unmodifiableList(actualPath);
+    }
+
+}