*/
package org.opendaylight.yangtools.yang.model.util;
-import java.util.ArrayList;
+import com.google.common.base.Function;
+import com.google.common.base.Preconditions;
+import com.google.common.base.Splitter;
+import com.google.common.collect.Iterables;
import java.util.Arrays;
+import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
-
+import java.util.Set;
import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
import org.opendaylight.yangtools.yang.model.api.ChoiceNode;
import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
-import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
+import org.opendaylight.yangtools.yang.model.api.GroupingDefinition;
+import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
+import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
import org.opendaylight.yangtools.yang.model.api.Module;
import org.opendaylight.yangtools.yang.model.api.ModuleImport;
+import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
import org.opendaylight.yangtools.yang.model.api.RevisionAwareXPath;
+import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
import org.opendaylight.yangtools.yang.model.api.SchemaContext;
import org.opendaylight.yangtools.yang.model.api.SchemaNode;
import org.opendaylight.yangtools.yang.model.api.SchemaPath;
-import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
-import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
-import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
-
-import org.opendaylight.yangtools.yang.model.api.GroupingDefinition;
-
-import com.google.common.base.Preconditions;
-
-import java.util.Set;
+import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
+import org.opendaylight.yangtools.yang.model.api.type.LeafrefTypeDefinition;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
/**
* The Schema Context Util contains support methods for searching through Schema
* instantiable.
*
*/
-public class SchemaContextUtil {
+public final class SchemaContextUtil {
+ private static final Logger LOG = LoggerFactory.getLogger(SchemaContextUtil.class);
+ private static final Splitter COLON_SPLITTER = Splitter.on(':');
+ private static final Splitter SLASH_SPLITTER = Splitter.on('/');
private SchemaContextUtil() {
}
* @return SchemaNode from the end of the Schema Path or <code>null</code>
* if the Node is not present.
*/
- public static SchemaNode findDataSchemaNode(SchemaContext context, SchemaPath schemaPath) {
+ public static SchemaNode findDataSchemaNode(final SchemaContext context, final SchemaPath schemaPath) {
Preconditions.checkArgument(context != null, "Schema Context reference cannot be NULL");
Preconditions.checkArgument(schemaPath != null, "Schema Path reference cannot be NULL");
- List<QName> prefixedPath = (schemaPath.getPath());
- if (prefixedPath != null) {
- return findNodeInSchemaContext(context, prefixedPath);
+
+ final Iterable<QName> prefixedPath = schemaPath.getPathFromRoot();
+ if (prefixedPath == null) {
+ LOG.debug("Schema path {} has null path", schemaPath);
+ return null;
}
- return null;
+
+ LOG.trace("Looking for path {} in context {}", schemaPath, context);
+ return findNodeInSchemaContext(context, prefixedPath);
}
/**
* Non-conditional Revision Aware XPath, or <code>null</code> if the
* DataSchemaNode is not present in Schema Context.
*/
- public static SchemaNode findDataSchemaNode(SchemaContext context, Module module, RevisionAwareXPath nonCondXPath) {
+ public static SchemaNode findDataSchemaNode(final SchemaContext context, final Module module, final RevisionAwareXPath nonCondXPath) {
Preconditions.checkArgument(context != null, "Schema Context reference cannot be NULL");
Preconditions.checkArgument(module != null, "Module reference cannot be NULL");
Preconditions.checkArgument(nonCondXPath != null, "Non Conditional Revision Aware XPath cannot be NULL");
String strXPath = nonCondXPath.toString();
if (strXPath != null) {
- if (strXPath.contains("[")) {
- throw new IllegalArgumentException("Revision Aware XPath cannot contains condition");
- }
+ Preconditions.checkArgument(strXPath.indexOf('[') == -1, "Revision Aware XPath may not contain a condition");
if (nonCondXPath.isAbsolute()) {
List<QName> qnamedPath = xpathToQNamePath(context, module, strXPath);
if (qnamedPath != null) {
* given relative Revision Aware XPath, otherwise will return
* <code>null</code>.
*/
- public static SchemaNode findDataSchemaNodeForRelativeXPath(SchemaContext context, Module module,
- SchemaNode actualSchemaNode, RevisionAwareXPath relativeXPath) {
+ public static SchemaNode findDataSchemaNodeForRelativeXPath(final SchemaContext context, final Module module,
+ final SchemaNode actualSchemaNode, final RevisionAwareXPath relativeXPath) {
Preconditions.checkArgument(context != null, "Schema Context reference cannot be NULL");
Preconditions.checkArgument(module != null, "Module reference cannot be NULL");
Preconditions.checkArgument(actualSchemaNode != null, "Actual Schema Node reference cannot be NULL");
SchemaPath actualNodePath = actualSchemaNode.getPath();
if (actualNodePath != null) {
- List<QName> qnamePath = resolveRelativeXPath(context, module, relativeXPath, actualSchemaNode);
+ Iterable<QName> qnamePath = resolveRelativeXPath(context, module, relativeXPath, actualSchemaNode);
if (qnamePath != null) {
return findNodeInSchemaContext(context, qnamePath);
* Schema Node is NOT present, the method will returns
* <code>null</code>
*/
- public static Module findParentModule(SchemaContext context, SchemaNode schemaNode) {
+ public static Module findParentModule(final SchemaContext context, final SchemaNode schemaNode) {
Preconditions.checkArgument(context != null, "Schema Context reference cannot be NULL!");
Preconditions.checkArgument(schemaNode != null, "Schema Node cannot be NULL!");
Preconditions.checkState(schemaNode.getPath() != null, "Schema Path for Schema Node is not "
+ "set properly (Schema Path is NULL)");
- List<QName> qnamedPath = schemaNode.getPath().getPath();
- if (qnamedPath == null || qnamedPath.isEmpty()) {
- throw new IllegalStateException("Schema Path contains invalid state of path parts."
- + "The Schema Path MUST contain at least ONE QName which defines namespace and Local name"
- + "of path.");
- }
- QName qname = qnamedPath.get(qnamedPath.size() - 1);
+ final QName qname = Iterables.getFirst(schemaNode.getPath().getPathTowardsRoot(), null);
+ Preconditions.checkState(qname != null,
+ "Schema Path contains invalid state of path parts. " +
+ "The Schema Path MUST contain at least ONE QName which defines namespace and Local name of path.");
return context.findModuleByNamespaceAndRevision(qname.getNamespace(), qname.getRevision());
}
- public static SchemaNode findNodeInSchemaContext(SchemaContext context, List<QName> path) {
- QName current = path.get(0);
- Module module = context.findModuleByNamespaceAndRevision(current.getNamespace(), current.getRevision());
- if (module == null)
+ public static SchemaNode findNodeInSchemaContext(final SchemaContext context, final Iterable<QName> path) {
+ final QName current = path.iterator().next();
+
+ LOG.trace("Looking up module {} in context {}", current, path);
+ final Module module = context.findModuleByNamespaceAndRevision(current.getNamespace(), current.getRevision());
+ if (module == null) {
+ LOG.debug("Module {} not found", current);
return null;
+ }
+
return findNodeInModule(module, path);
}
- public static GroupingDefinition findGrouping(SchemaContext context, Module module, List<QName> path) {
- QName first = path.get(0);
- Module m = context.findModuleByNamespace(first.getNamespace()).iterator().next();
- DataNodeContainer currentParent = m;
- for (QName qname : path) {
- boolean found = false;
- DataNodeContainer node = (DataNodeContainer) currentParent.getDataChildByName(qname.getLocalName());
- if (node == null) {
- Set<GroupingDefinition> groupings = currentParent.getGroupings();
- for (GroupingDefinition gr : groupings) {
- if (gr.getQName().getLocalName().equals(qname.getLocalName())) {
- currentParent = gr;
- found = true;
- }
- }
- } else {
- found = true;
- currentParent = node;
+ private static SchemaNode findNodeInModule(final Module module, final Iterable<QName> path) {
+ final QName current = path.iterator().next();
+
+ LOG.trace("Looking for data container {} in module {}", current, module);
+ SchemaNode parent = module.getDataChildByName(current);
+ if (parent != null) {
+ final SchemaNode ret = findNode((DataSchemaNode) parent, nextLevel(path));
+ if (ret != null) {
+ return ret;
}
- if (!found) {
- throw new IllegalArgumentException("Failed to find referenced grouping: " + path + "("
- + qname.getLocalName() + ")");
+ }
+
+ LOG.trace("Looking for RPC {} in module {}", current, module);
+ parent = getRpcByName(module, current);
+ if (parent != null) {
+ final SchemaNode ret = findNodeInRpc((RpcDefinition) parent, nextLevel(path));
+ if (ret != null) {
+ return ret;
}
}
- return (GroupingDefinition) currentParent;
- }
+ LOG.trace("Looking for notification {} in module {}", current, module);
+ parent = getNotificationByName(module, current);
+ if (parent != null) {
+ final SchemaNode ret = findNodeInNotification((NotificationDefinition) parent, nextLevel(path));
+ if (ret != null) {
+ return ret;
+ }
+ }
- private static SchemaNode findNodeInModule(Module module, List<QName> path) {
- QName current = path.get(0);
- SchemaNode node = module.getDataChildByName(current);
- if (node != null)
- return findNode((DataSchemaNode) node, nextLevel(path));
- node = getRpcByName(module, current);
- if (node != null)
- return findNodeInRpc((RpcDefinition) node, nextLevel(path));
- node = getNotificationByName(module, current);
- if (node != null)
- return findNodeInNotification((NotificationDefinition) node, nextLevel(path));
- node = getGroupingByName(module, current);
- if (node != null)
- return findNodeInGrouping((GroupingDefinition) node, nextLevel(path));
- return node;
+ LOG.trace("Looking for grouping {} in module {}", current, module);
+ parent = getGroupingByName(module, current);
+ if (parent != null) {
+ final SchemaNode ret = findNodeInGrouping((GroupingDefinition) parent, nextLevel(path));
+ if (ret != null) {
+ return ret;
+ }
+ }
+
+ LOG.debug("No node matching {} found in module {}", path, module);
+ return null;
}
- private static SchemaNode findNodeInGrouping(GroupingDefinition grouping, List<QName> path) {
- if (path.isEmpty())
+ private static SchemaNode findNodeInGrouping(
+ final GroupingDefinition grouping, final Iterable<QName> path) {
+ final QName current = Iterables.getFirst(path, null);
+ if (current == null) {
+ LOG.debug("Found grouping {}", grouping);
return grouping;
- QName current = path.get(0);
- DataSchemaNode node = grouping.getDataChildByName(current);
+ }
+
+ LOG.trace("Looking for path {} in grouping {}", path, grouping);
+ final DataSchemaNode node = grouping.getDataChildByName(current);
+
if (node != null)
return findNode(node, nextLevel(path));
+
+ for (GroupingDefinition groupingDefinition : grouping.getGroupings()) {
+ if (groupingDefinition.getQName().equals(current))
+ return findNodeInGrouping(groupingDefinition, nextLevel(path));
+ }
+
+ LOG.debug("No node matching {} found in grouping {}", current, grouping);
return null;
}
- private static SchemaNode findNodeInRpc(RpcDefinition rpc, List<QName> path) {
- if (path.isEmpty())
+ private static SchemaNode findNodeInRpc(final RpcDefinition rpc, final Iterable<QName> path) {
+ final QName current = Iterables.getFirst(path, null);
+ if (current == null) {
+ LOG.debug("Found RPC {}", rpc);
return rpc;
- QName current = path.get(0);
+ }
+
+ LOG.trace("Looking for path {} in rpc {}", path, rpc);
switch (current.getLocalName()) {
case "input":
return findNode(rpc.getInput(), nextLevel(path));
case "output":
return findNode(rpc.getOutput(), nextLevel(path));
+ default:
+ LOG.debug("Invalid component {} of path {} in RPC {}", current, path, rpc);
+ return null;
}
- return null;
}
- private static SchemaNode findNodeInNotification(NotificationDefinition rpc, List<QName> path) {
- if (path.isEmpty())
- return rpc;
- QName current = path.get(0);
- DataSchemaNode node = rpc.getDataChildByName(current);
- if (node != null)
- return findNode(node, nextLevel(path));
- return null;
+ private static SchemaNode findNodeInNotification(final NotificationDefinition ntf, final Iterable<QName> path) {
+ final QName current = Iterables.getFirst(path, null);
+ if (current == null) {
+ LOG.debug("Found notification {}", ntf);
+ return ntf;
+ }
+
+ LOG.trace("Looking for path {} in notification {}", path, ntf);
+ DataSchemaNode node = ntf.getDataChildByName(current);
+ if (node == null) {
+ LOG.debug("No node matching {} found in notification {}", current, ntf);
+ return null;
+ }
+
+ return findNode(node, nextLevel(path));
}
- private static SchemaNode findNode(ChoiceNode parent, List<QName> path) {
- if (path.isEmpty())
+ private static SchemaNode findNode(final ChoiceNode parent, final Iterable<QName> path) {
+ final QName current = Iterables.getFirst(path, null);
+ if (current == null) {
return parent;
- QName current = path.get(0);
+ }
ChoiceCaseNode node = parent.getCaseNodeByName(current);
- if (node != null)
+ if (node != null) {
return findNodeInCase(node, nextLevel(path));
+ }
return null;
}
- private static SchemaNode findNode(ContainerSchemaNode parent, List<QName> path) {
- if (path.isEmpty())
+ private static SchemaNode findNode(final ContainerSchemaNode parent, final Iterable<QName> path) {
+ final QName current = Iterables.getFirst(path, null);
+ if (current == null) {
return parent;
- QName current = path.get(0);
- DataSchemaNode node = parent.getDataChildByName(current);
- if (node != null)
- return findNode(node, nextLevel(path));
- return null;
+ }
+
+ final DataSchemaNode node = parent.getDataChildByName(current);
+ if (node == null) {
+ LOG.debug("Failed to find {} in parent {}", path, parent);
+ return null;
+ }
+
+ return findNode(node, nextLevel(path));
}
- private static SchemaNode findNode(ListSchemaNode parent, List<QName> path) {
- if (path.isEmpty())
+ private static SchemaNode findNode(final ListSchemaNode parent, final Iterable<QName> path) {
+ final QName current = Iterables.getFirst(path, null);
+ if (current == null) {
return parent;
- QName current = path.get(0);
+ }
+
DataSchemaNode node = parent.getDataChildByName(current);
- if (node != null)
- return findNode(node, nextLevel(path));
- return null;
+ if (node == null) {
+ LOG.debug("Failed to find {} in parent {}", path, parent);
+ return null;
+ }
+ return findNode(node, nextLevel(path));
}
- private static SchemaNode findNode(DataSchemaNode parent, List<QName> path) {
- SchemaNode result = null;
- if (path.isEmpty()) {
- result = parent;
- } else {
+ private static SchemaNode findNode(final DataSchemaNode parent, final Iterable<QName> path) {
+ final SchemaNode node;
+ if (!Iterables.isEmpty(path)) {
if (parent instanceof ContainerSchemaNode) {
- result = findNode((ContainerSchemaNode) parent, path);
+ node = findNode((ContainerSchemaNode) parent, path);
} else if (parent instanceof ListSchemaNode) {
- result = findNode((ListSchemaNode) parent, path);
+ node = findNode((ListSchemaNode) parent, path);
} else if (parent instanceof ChoiceNode) {
- result = findNode((ChoiceNode) parent, path);
+ node = findNode((ChoiceNode) parent, path);
} else {
- throw new IllegalArgumentException("Path nesting violation");
+ throw new IllegalArgumentException(
+ String.format("Path nesting violation in parent %s path %s", parent, path));
}
+ } else {
+ node = parent;
}
- return result;
+
+ if (node == null) {
+ LOG.debug("Failed to find {} in parent {}", path, parent);
+ return null;
+ }
+ return node;
}
- public static SchemaNode findNodeInCase(ChoiceCaseNode parent, List<QName> path) {
- if (path.isEmpty())
+ private static SchemaNode findNodeInCase(final ChoiceCaseNode parent, final Iterable<QName> path) {
+ final QName current = Iterables.getFirst(path, null);
+ if (current == null) {
return parent;
- QName current = path.get(0);
+ }
+
DataSchemaNode node = parent.getDataChildByName(current);
- if (node != null)
- return findNode(node, nextLevel(path));
- return null;
+ if (node == null) {
+ LOG.debug("Failed to find {} in parent {}", path, parent);
+ return null;
+ }
+ return findNode(node, nextLevel(path));
}
- public static RpcDefinition getRpcByName(Module module, QName name) {
+ private static RpcDefinition getRpcByName(final Module module, final QName name) {
for (RpcDefinition rpc : module.getRpcs()) {
if (rpc.getQName().equals(name)) {
return rpc;
return null;
}
- private static List<QName> nextLevel(List<QName> path) {
- return path.subList(1, path.size());
+ private static Iterable<QName> nextLevel(final Iterable<QName> path) {
+ return Iterables.skip(path, 1);
}
- public static NotificationDefinition getNotificationByName(Module module, QName name) {
+ private static NotificationDefinition getNotificationByName(final Module module, final QName name) {
for (NotificationDefinition notification : module.getNotifications()) {
if (notification.getQName().equals(name)) {
return notification;
return null;
}
- public static GroupingDefinition getGroupingByName(Module module, QName name) {
+ private static GroupingDefinition getGroupingByName(final Module module, final QName name) {
for (GroupingDefinition grouping : module.getGroupings()) {
if (grouping.getQName().equals(name)) {
return grouping;
* XPath String
* @return return a list of QName
*/
- private static List<QName> xpathToQNamePath(SchemaContext context, Module parentModule, String xpath) {
+ private static List<QName> xpathToQNamePath(final SchemaContext context, final Module parentModule, final String xpath) {
Preconditions.checkArgument(context != null, "Schema Context reference cannot be NULL");
Preconditions.checkArgument(parentModule != null, "Parent Module reference cannot be NULL");
Preconditions.checkArgument(xpath != null, "XPath string reference cannot be NULL");
List<QName> path = new LinkedList<QName>();
- String[] prefixedPath = xpath.split("/");
- for (String pathComponent : prefixedPath) {
+ for (String pathComponent : SLASH_SPLITTER.split(xpath)) {
if (!pathComponent.isEmpty()) {
path.add(stringPathPartToQName(context, parentModule, pathComponent));
}
* Prefixed Path Part string
* @return QName from prefixed Path Part String.
*/
- private static QName stringPathPartToQName(SchemaContext context, Module parentModule, String prefixedPathPart) {
+ private static QName stringPathPartToQName(final SchemaContext context, final Module parentModule, final String prefixedPathPart) {
Preconditions.checkArgument(context != null, "Schema Context reference cannot be NULL");
Preconditions.checkArgument(parentModule != null, "Parent Module reference cannot be NULL");
Preconditions.checkArgument(prefixedPathPart != null, "Prefixed Path Part cannot be NULL!");
- if (prefixedPathPart.contains(":")) {
- String[] prefixedName = prefixedPathPart.split(":");
- Module module = resolveModuleForPrefix(context, parentModule, prefixedName[0]);
- if (module == null) {
- throw new IllegalArgumentException("Failed to resolve xpath: no module found for prefix "
- + prefixedName[0] + " in module " + parentModule.getName());
- } else {
- return new QName(module.getNamespace(), module.getRevision(), prefixedName[1]);
- }
+ if (prefixedPathPart.indexOf(':') != -1) {
+ final Iterator<String> prefixedName = COLON_SPLITTER.split(prefixedPathPart).iterator();
+ final String modulePrefix = prefixedName.next();
+
+ Module module = resolveModuleForPrefix(context, parentModule, modulePrefix);
+ Preconditions.checkArgument(module != null, "Failed to resolve xpath: no module found for prefix %s in module %s",
+ modulePrefix, parentModule.getName());
+
+ return QName.create(module.getQNameModule(), prefixedName.next());
} else {
- return new QName(parentModule.getNamespace(), parentModule.getRevision(), prefixedPathPart);
+ return QName.create(parentModule.getNamespace(), parentModule.getRevision(), prefixedPathPart);
}
}
* @return Module for given prefix in specified Schema Context if is
* present, otherwise returns <code>null</code>
*/
- private static Module resolveModuleForPrefix(SchemaContext context, Module module, String prefix) {
+ private static Module resolveModuleForPrefix(final SchemaContext context, final Module module, final String prefix) {
Preconditions.checkArgument(context != null, "Schema Context reference cannot be NULL");
Preconditions.checkArgument(module != null, "Module reference cannot be NULL");
Preconditions.checkArgument(prefix != null, "Prefix string cannot be NULL");
* Yang Module
* @param relativeXPath
* Non conditional Revision Aware Relative XPath
- * @param leafrefSchemaPath
- * Schema Path for Leafref
+ * @param actualSchemaNode
+ * actual schema node
* @return list of QName
*/
- private static List<QName> resolveRelativeXPath(SchemaContext context, Module module,
- RevisionAwareXPath relativeXPath, SchemaNode leafrefParentNode) {
+ private static Iterable<QName> resolveRelativeXPath(final SchemaContext context, final Module module,
+ final RevisionAwareXPath relativeXPath, final SchemaNode actualSchemaNode) {
Preconditions.checkArgument(context != null, "Schema Context reference cannot be NULL");
Preconditions.checkArgument(module != null, "Module reference cannot be NULL");
Preconditions.checkArgument(relativeXPath != null, "Non Conditional Revision Aware XPath cannot be NULL");
Preconditions.checkState(!relativeXPath.isAbsolute(),
"Revision Aware XPath MUST be relative i.e. MUST contains ../, "
+ "for non relative Revision Aware XPath use findDataSchemaNode method");
- Preconditions.checkState(leafrefParentNode.getPath() != null,
+ Preconditions.checkState(actualSchemaNode.getPath() != null,
"Schema Path reference for Leafref cannot be NULL");
- List<QName> absolutePath = new LinkedList<QName>();
- String strXPath = relativeXPath.toString();
- String[] xpaths = strXPath.split("/");
+ final Iterable<String> xpaths = SLASH_SPLITTER.split(relativeXPath.toString());
+ // Find out how many "parent" components there are
+ // FIXME: is .contains() the right check here?
+ // FIXME: case ../../node1/node2/../node3/../node4
int colCount = 0;
- while (xpaths[colCount].contains("..")) {
- colCount = colCount + 1;
- }
- List<QName> path = leafrefParentNode.getPath().getPath();
- if (path != null) {
- int lenght = path.size() - colCount;
- absolutePath.addAll(path.subList(0, lenght));
- List<String> xpathsList = Arrays.asList(xpaths);
- List<String> sublistedXPath = xpathsList.subList(colCount, xpaths.length);
- List<QName> sublist = new ArrayList<>();
- for (String pathPart : sublistedXPath) {
- sublist.add(stringPathPartToQName(context, module, pathPart));
- }
- absolutePath.addAll(sublist);
+ for (Iterator<String> it = xpaths.iterator(); it.hasNext() && it.next().contains(".."); ) {
+ ++colCount;
+ }
+
+ final Iterable<QName> schemaNodePath = actualSchemaNode.getPath().getPathFromRoot();
+
+ if (Iterables.size(schemaNodePath) - colCount >= 0) {
+ return Iterables.concat(Iterables.limit(schemaNodePath, Iterables.size(schemaNodePath) - colCount),
+ Iterables.transform(Iterables.skip(xpaths, colCount), new Function<String, QName>() {
+ @Override
+ public QName apply(final String input) {
+ return stringPathPartToQName(context, module, input);
+ }
+ }));
}
+ return Iterables.concat(schemaNodePath,
+ Iterables.transform(Iterables.skip(xpaths, colCount), new Function<String, QName>() {
+ @Override
+ public QName apply(final String input) {
+ return stringPathPartToQName(context, module, input);
+ }
+ }));
+ }
- return absolutePath;
+ /**
+ * Extracts the base type of node on which schema node points to. If target node is again of type LeafrefTypeDefinition, methods will be call recursively until it reach concrete
+ * type definition.
+ *
+ * @param typeDefinition
+ * type of node which will be extracted
+ * @param schemaContext
+ * Schema Context
+ * @param schema
+ * Schema Node
+ * @return recursively found type definition this leafref is pointing to or null if the xpath is incorrect (null is there to preserve backwards compatibility)
+ */
+ public static TypeDefinition<?> getBaseTypeForLeafRef(final LeafrefTypeDefinition typeDefinition, final SchemaContext schemaContext, final SchemaNode schema) {
+ RevisionAwareXPath pathStatement = typeDefinition.getPathStatement();
+ pathStatement = new RevisionAwareXPathImpl(stripConditionsFromXPathString(pathStatement), pathStatement.isAbsolute());
+
+ final Module parentModule = SchemaContextUtil.findParentModule(schemaContext, schema);
+
+ final DataSchemaNode dataSchemaNode;
+ if(pathStatement.isAbsolute()) {
+ dataSchemaNode = (DataSchemaNode) SchemaContextUtil.findDataSchemaNode(schemaContext, parentModule, pathStatement);
+ } else {
+ dataSchemaNode = (DataSchemaNode) SchemaContextUtil.findDataSchemaNodeForRelativeXPath(schemaContext, parentModule, schema, pathStatement);
+ }
+
+ // FIXME this is just to preserve backwards compatibility since yangtools do not mind wrong leafref xpaths
+ // and current expected behaviour for such cases is to just use pure string
+ // This should throw an exception about incorrect XPath in leafref
+ if(dataSchemaNode == null) {
+ return null;
+ }
+
+ final TypeDefinition<?> targetTypeDefinition = typeDefinition(dataSchemaNode);
+
+ if(targetTypeDefinition instanceof LeafrefTypeDefinition) {
+ return getBaseTypeForLeafRef(((LeafrefTypeDefinition) targetTypeDefinition), schemaContext, dataSchemaNode);
+ } else {
+ return targetTypeDefinition;
+ }
+ }
+
+ /**
+ * Removes conditions from xPath pointed to target node.
+ *
+ * @param pathStatement
+ * xPath to target node
+ * @return string representation of xPath without conditions
+ *
+ */
+ private static String stripConditionsFromXPathString(final RevisionAwareXPath pathStatement) {
+ return pathStatement.toString().replaceAll("\\[.*\\]", "");
+ }
+
+ /**
+ * Extracts the base type of leaf schema node until it reach concrete type of TypeDefinition.
+ *
+ * @param node
+ * a node representing LeafSchemaNode
+ * @return concrete type definition of node value
+ */
+ private static TypeDefinition<? extends Object> typeDefinition(final LeafSchemaNode node) {
+ TypeDefinition<?> baseType = node.getType();
+ while (baseType.getBaseType() != null) {
+ baseType = baseType.getBaseType();
+ }
+ return baseType;
+ }
+
+ /**
+ * Extracts the base type of leaf schema node until it reach concrete type of TypeDefinition.
+ *
+ * @param node
+ * a node representing LeafListSchemaNode
+ * @return concrete type definition of node value
+ */
+ private static TypeDefinition<? extends Object> typeDefinition(final LeafListSchemaNode node) {
+ TypeDefinition<?> baseType = node.getType();
+ while (baseType.getBaseType() != null) {
+ baseType = baseType.getBaseType();
+ }
+ return baseType;
+ }
+
+ /**
+ * Gets the base type of DataSchemaNode value.
+ *
+ * @param node
+ * a node representing DataSchemaNode
+ * @return concrete type definition of node value
+ */
+ private static TypeDefinition<? extends Object> typeDefinition(final DataSchemaNode node) {
+ if (node instanceof LeafListSchemaNode) {
+ return typeDefinition((LeafListSchemaNode) node);
+ } else if (node instanceof LeafSchemaNode) {
+ return typeDefinition((LeafSchemaNode) node);
+ } else {
+ throw new IllegalArgumentException("Unhandled parameter types: " + Arrays.<Object> asList(node).toString());
+ }
}
}