+package org.opendaylight.yangtools.sal.binding.generator.util;
+
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.BiMap;
+import com.google.common.collect.FluentIterable;
+import com.google.common.collect.HashBiMap;
+import com.google.common.collect.HashMultimap;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Multimap;
+import java.util.AbstractMap;
+import java.util.AbstractMap.SimpleEntry;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import org.opendaylight.yangtools.binding.generator.util.ReferencedTypeImpl;
+import org.opendaylight.yangtools.concepts.Immutable;
+import org.opendaylight.yangtools.sal.binding.generator.api.ClassLoadingStrategy;
+import org.opendaylight.yangtools.sal.binding.generator.impl.BindingGeneratorImpl;
+import org.opendaylight.yangtools.sal.binding.generator.impl.BindingSchemaContextUtils;
+import org.opendaylight.yangtools.sal.binding.generator.impl.ModuleContext;
+import org.opendaylight.yangtools.sal.binding.model.api.GeneratedType;
+import org.opendaylight.yangtools.sal.binding.model.api.MethodSignature;
+import org.opendaylight.yangtools.sal.binding.model.api.ParameterizedType;
+import org.opendaylight.yangtools.sal.binding.model.api.Type;
+import org.opendaylight.yangtools.sal.binding.model.api.type.builder.GeneratedTypeBuilder;
+import org.opendaylight.yangtools.yang.binding.Augmentation;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
+import org.opendaylight.yangtools.yang.data.impl.schema.transform.base.AugmentationSchemaProxy;
+import org.opendaylight.yangtools.yang.model.api.AugmentationSchema;
+import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
+import org.opendaylight.yangtools.yang.model.api.ChoiceNode;
+import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
+import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
+import org.opendaylight.yangtools.yang.model.api.Module;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.model.api.SchemaNode;
+import org.opendaylight.yangtools.yang.model.util.SchemaNodeUtils;
+/**
+ *
+ * Runtime Context for Java YANG Binding classes
+ *
+ *<p>
+ * Runtime Context provides additional insight in Java YANG Binding,
+ * binding classes and underlying YANG schema, it contains
+ * runtime information, which could not be derived from generated
+ * classes alone using {@link org.opendaylight.yangtools.yang.binding.util.BindingReflections}.
+ * <p>
+ * Some of this information are for example list of all available
+ * children for cases {@link #getChoiceCaseChildren(DataNodeContainer)}, since
+ * choices are augmentable and new choices may be introduced by additional models.
+ * <p>
+ * Same goes for all possible augmentations.
+ *
+ */
+public class BindingRuntimeContext implements Immutable {
+
+ private final ClassLoadingStrategy strategy;
+ private final SchemaContext schemaContext;
+
+ private final Map<Type, AugmentationSchema> augmentationToSchema = new HashMap<>();
+ private final BiMap<Type, Object> typeToDefiningSchema = HashBiMap.create();
+ private final Multimap<Type, Type> augmentableToAugmentations = HashMultimap.create();
+ private final Multimap<Type, Type> choiceToCases = HashMultimap.create();
+
+ private BindingRuntimeContext(final ClassLoadingStrategy strategy, final SchemaContext schema) {
+ this.strategy = strategy;
+ this.schemaContext = schema;
+
+ BindingGeneratorImpl generator = new BindingGeneratorImpl();
+ generator.generateTypes(schema);
+ Map<Module, ModuleContext> modules = generator.getModuleContexts();
+
+ for (Entry<Module, ModuleContext> entry : modules.entrySet()) {
+ ModuleContext ctx = entry.getValue();
+ augmentationToSchema.putAll(ctx.getTypeToAugmentation());
+ typeToDefiningSchema.putAll(ctx.getTypeToSchema());
+ augmentableToAugmentations.putAll(ctx.getAugmentableToAugmentations());
+ choiceToCases.putAll(ctx.getChoiceToCases());
+ }
+ }
+
+ /**
+ *
+ * Creates Binding Runtime Context from supplied class loading strategy and schema context.
+ *
+ * @param strategy Class loading strategy to retrieve generated Binding classes
+ * @param ctx Schema Context which describes YANG model and to which Binding classes should be mapped
+ * @return Instance of BindingRuntimeContext for supplied schema context.
+ */
+ public static final BindingRuntimeContext create(final ClassLoadingStrategy strategy, final SchemaContext ctx) {
+
+ return new BindingRuntimeContext(strategy, ctx);
+ }
+
+ /**
+ * Returns a class loading strategy associated with this binding runtime context
+ * which is used to load classes.
+ *
+ * @return Class loading strategy.
+ */
+ public ClassLoadingStrategy getStrategy() {
+ return strategy;
+ }
+
+ /**
+ * Returns an stable immutable view of schema context associated with this Binding runtime context.
+ *
+ * @return stable view of schema context
+ */
+ public SchemaContext getSchemaContext() {
+ return schemaContext;
+ }
+
+ /**
+ * Returns schema of augmentation
+ * <p>
+ * Returned schema is schema definition from which augmentation class was generated.
+ * This schema is isolated from other augmentations. This means it contains
+ * augmentation definition as was present in original YANG module.
+ * <p>
+ * Children of returned schema does not contain any additional augmentations,
+ * which may be present in runtime for them, thus returned schema is unsuitable
+ * for use for validation of data.
+ * <p>
+ * For retrieving {@link AugmentationSchema}, which will contains
+ * full model for child nodes, you should use method {@link #getResolvedAugmentationSchema(DataNodeContainer, Class)}
+ * which will return augmentation schema derived from supplied augmentation target
+ * schema.
+ *
+ * @param augClass Augmentation class
+ * @return Schema of augmentation
+ * @throws IllegalArgumentException If supplied class is not an augmentation or current context does not contain schema for augmenation.
+ */
+ public AugmentationSchema getAugmentationDefinition(final Class<?> augClass) throws IllegalArgumentException {
+ Preconditions.checkArgument(Augmentation.class.isAssignableFrom(augClass),"Class {} does not represent augmentation",augClass);
+ final AugmentationSchema ret = augmentationToSchema.get(referencedType(augClass));
+ Preconditions.checkArgument(ret != null, "Supplied augmentation {} is not valid in current context",augClass);
+ return ret;
+ }
+
+ /**
+ * Returns defining {@link DataSchemaNode} for supplied class.
+ *
+ * <p>
+ * Returned schema is schema definition from which class was generated.
+ * This schema may be isolated from augmentations, if supplied class
+ * represent node, which was child of grouping or augmentation.
+ * <p>
+ * For getting augmentation schema from augmentation class use
+ * {@link #getAugmentationDefinition(Class)} instead.
+ *
+ * @param cls Class which represents list, container, choice or case.
+ * @return Schema node, from which class was generated.
+ */
+ public DataSchemaNode getSchemaDefinition(final Class<?> cls) {
+ Preconditions.checkArgument(Augmentation.class.isAssignableFrom(cls));
+ return (DataSchemaNode) typeToDefiningSchema.get(referencedType(cls));
+ }
+
+ public Entry<AugmentationIdentifier, AugmentationSchema> getResolvedAugmentationSchema(final DataNodeContainer target,
+ final Class<? extends Augmentation<?>> aug) {
+ AugmentationSchema origSchema = getAugmentationDefinition(aug);
+ /*
+ * FIXME: Validate augmentation schema lookup
+ *
+ * Currently this algorithm, does not verify if instantiated child nodes
+ * are real one derived from augmentation schema. The problem with
+ * full validation is, if user used copy builders, he may use
+ * augmentation which was generated for different place.
+ *
+ * If this augmentations have same definition, we emit same identifier
+ * with data and it is up to underlying user to validate data.
+ *
+ */
+ Set<QName> childNames = new HashSet<>();
+ Set<DataSchemaNode> realChilds = new HashSet<>();
+ for (DataSchemaNode child : origSchema.getChildNodes()) {
+ realChilds.add(target.getDataChildByName(child.getQName()));
+ childNames.add(child.getQName());
+ }
+
+ AugmentationIdentifier identifier = new AugmentationIdentifier(childNames);
+ AugmentationSchema proxy = new AugmentationSchemaProxy(origSchema, realChilds);
+ return new AbstractMap.SimpleEntry<>(identifier, proxy);
+ }
+
+ /**
+ *
+ * Returns resolved case schema for supplied class
+ *
+ * @param schema Resolved parent choice schema
+ * @param childClass Class representing case.
+ * @return Resolved case schema.
+ * @throws IllegalArgumentException If supplied class does not represent case or supplied case class is not
+ * valid in the context of parent choice schema.
+ */
+ public ChoiceCaseNode getCaseSchemaDefinition(final ChoiceNode schema, final Class<?> childClass) throws IllegalArgumentException {
+ DataSchemaNode origSchema = getSchemaDefinition(childClass);
+ Preconditions.checkArgument(origSchema instanceof ChoiceCaseNode, "Supplied {} is not case.");
+ /* FIXME: Make sure that if there are multiple augmentations of same
+ * named case, with same structure we treat it as equals
+ * this is due property of Binding specification and copy builders
+ * that user may be unaware that he is using incorrect case
+ * which was generated for choice inside grouping.
+ */
+ Optional<ChoiceCaseNode> found = BindingSchemaContextUtils.findInstantiatedCase(schema,
+ (ChoiceCaseNode) origSchema);
+ Preconditions.checkArgument(found.isPresent(), "Supplied {} is not valid case in schema", schema);
+ return found.get();
+ }
+
+ private static Type referencedType(final Class<?> type) {
+ return new ReferencedTypeImpl(type.getPackage().getName(), type.getSimpleName());
+ }
+
+ public Entry<GeneratedType, Object> getTypeWithSchema(final Class<?> type) {
+ Object schema = typeToDefiningSchema.get(referencedType(type));
+ Type definedType = typeToDefiningSchema.inverse().get(schema);
+ Preconditions.checkNotNull(schema);
+ Preconditions.checkNotNull(definedType);
+
+ return new SimpleEntry<>(((GeneratedTypeBuilder) definedType).toInstance(), schema);
+ }
+
+ public ImmutableMap<Type, Entry<Type, Type>> getChoiceCaseChildren(final DataNodeContainer schema) {
+ Map<Type,Entry<Type,Type>> childToCase = new HashMap<>();;
+ for(ChoiceNode choice : FluentIterable.from(schema.getChildNodes()).filter(ChoiceNode.class)) {
+ ChoiceNode originalChoice = getOriginalSchema(choice);
+ Type choiceType = referencedType(typeToDefiningSchema.inverse().get(originalChoice));
+ Collection<Type> cases = choiceToCases.get(choiceType);
+
+ for(Type caze : cases) {
+ Entry<Type,Type> caseIdentifier = new SimpleEntry<>(choiceType,caze);
+ HashSet<Type> caseChildren = new HashSet<>();
+ if(caze instanceof GeneratedTypeBuilder) {
+ caze = ((GeneratedTypeBuilder) caze).toInstance();
+ }
+ collectAllContainerTypes((GeneratedType) caze, caseChildren);
+ for(Type caseChild : caseChildren) {
+ childToCase.put(caseChild, caseIdentifier);
+ }
+ }
+ }
+ return ImmutableMap.copyOf(childToCase);
+
+ }
+
+ private static Type referencedType(final Type type) {
+ if(type instanceof ReferencedTypeImpl) {
+ return type;
+ }
+ return new ReferencedTypeImpl(type.getPackageName(), type.getName());
+ }
+
+ private static Set<Type> collectAllContainerTypes(final GeneratedType type, final Set<Type> collection) {
+ for (MethodSignature definition : type.getMethodDefinitions()) {
+ Type childType = definition.getReturnType();
+ if(childType instanceof ParameterizedType) {
+ childType = ((ParameterizedType) childType).getActualTypeArguments()[0];
+ }
+ if(childType instanceof GeneratedType || childType instanceof GeneratedTypeBuilder) {
+ collection.add(referencedType(childType));
+ }
+ }
+ for (Type parent : type.getImplements()) {
+ if (parent instanceof GeneratedType) {
+ collectAllContainerTypes((GeneratedType) parent, collection);
+ }
+ }
+ return collection;
+ }
+
+ private static final <T extends SchemaNode> T getOriginalSchema(final T choice) {
+ @SuppressWarnings("unchecked")
+ T original = (T) SchemaNodeUtils.getRootOriginalIfPossible(choice);
+ if(original != null) {
+ return original;
+ }
+ return choice;
+ }
+
+}