+++ /dev/null
-/*
- * Copyright (c) 2017 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.mdsal.binding.javav2.spec.base;
-
-import static java.util.Objects.requireNonNull;
-
-import com.google.common.annotations.Beta;
-import com.google.common.base.MoreObjects;
-import com.google.common.base.MoreObjects.ToStringHelper;
-import com.google.common.base.Preconditions;
-import com.google.common.collect.ImmutableCollection;
-import com.google.common.collect.ImmutableList;
-import com.google.common.collect.Iterables;
-import java.io.IOException;
-import java.io.Serializable;
-import java.lang.reflect.Field;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Iterator;
-import java.util.List;
-import org.opendaylight.mdsal.binding.javav2.spec.structural.Augmentation;
-import org.opendaylight.mdsal.binding.javav2.spec.structural.TreeChildNode;
-import org.opendaylight.yangtools.concepts.Identifiable;
-import org.opendaylight.yangtools.concepts.Immutable;
-import org.opendaylight.yangtools.concepts.Path;
-import org.opendaylight.yangtools.util.HashCodeBuilder;
-
-/**
- *
- * This instance identifier uniquely identifies a specific TreeNode in the data tree modeled by
- * YANG.
- *
- * For Example let's say you were trying to refer to a node in inventory which was modeled in YANG
- * as follows,
- *
- * <pre>
- * module opendaylight-inventory {
- * ....
- *
- * container nodes {
- * list node {
- * key "id";
- * ext:context-instance "node-context";
- *
- * uses node;
- * }
- * }
- *
- * }
- * </pre>
- *
- * You could create an instance identifier as follows to get to a node with id "openflow:1"
- *
- * InstanceIdentifierBuilder.builder(Nodes.class).child(Node.class, new NodeKey(new
- * NodeId("openflow:1")).build();
- *
- * This would be the same as using a path like so, "/nodes/node/openflow:1" to refer to the
- * openflow:1 node
- *
- */
-@Beta
-public class InstanceIdentifier<T extends TreeNode> implements Path<InstanceIdentifier<? extends TreeNode>>, Immutable,
- Serializable {
- private static final Field PATHARGUMENTS_FIELD;
- private static final long serialVersionUID = 2L;
- /*
- * Protected to differentiate internal and external access. Internal
- * access is required never to modify the contents. References passed
- * to outside entities have to be wrapped in an unmodifiable view.
- */
- protected transient final Iterable<TreeArgument> pathArguments;
- private final Class<T> targetType;
- private final boolean wildcarded;
- private final int hash;
-
- static {
- final Field f;
- try {
- f = InstanceIdentifier.class.getDeclaredField("pathArguments");
- } catch (NoSuchFieldException | SecurityException e) {
- throw new ExceptionInInitializerError(e);
- }
- f.setAccessible(true);
- PATHARGUMENTS_FIELD = f;
- }
-
- InstanceIdentifier(final Class<T> type, final Iterable<TreeArgument> pathArguments, final boolean wildcarded, final int hash) {
- this.pathArguments = requireNonNull(pathArguments);
- this.targetType = requireNonNull(type);
- this.wildcarded = wildcarded;
- this.hash = hash;
- }
-
- /**
- * Return the type of data which this InstanceIdentifier identifies.
- *
- * @return Target type
- */
- public final Class<T> getTargetType() {
- return targetType;
- }
-
- /**
- * Return the path argument chain which makes up this instance identifier.
- *
- * @return Path argument chain. Immutable and does not contain nulls.
- */
- public final Iterable<TreeArgument> getPathArguments() {
- return Iterables.unmodifiableIterable(pathArguments);
- }
-
- /**
- * Check whether an instance identifier contains any wildcards. A wildcard
- * is an path argument which has a null key.
- *
- * @return true if any of the path arguments has a null key.
- */
- public final boolean isWildcarded() {
- return wildcarded;
- }
-
- @Override
- public final int hashCode() {
- return hash;
- }
-
- @Override
- public final boolean equals(final Object obj) {
- if (this == obj) {
- return true;
- }
- if (obj == null) {
- return false;
- }
- if (getClass() != obj.getClass()) {
- return false;
- }
-
- final InstanceIdentifier<?> other = (InstanceIdentifier<?>) obj;
- if (pathArguments == other.pathArguments) {
- return true;
- }
-
- /*
- * We could now just go and compare the pathArguments, but that
- * can be potentially expensive. Let's try to avoid that by
- * checking various things that we have cached from pathArguments
- * and trying to prove the identifiers are *not* equal.
- */
- if (hash != other.hash) {
- return false;
- }
- if (wildcarded != other.wildcarded) {
- return false;
- }
- if (targetType != other.targetType) {
- return false;
- }
- if (fastNonEqual(other)) {
- return false;
- }
-
- // Everything checks out so far, so we have to do a full equals
- return Iterables.elementsEqual(pathArguments, other.pathArguments);
- }
-
- /**
- * Perform class-specific fast checks for non-equality. This allows
- * subclasses to avoid iterating over the pathArguments by performing
- * quick checks on their specific fields.
- *
- * @param other The other identifier, guaranteed to be the same class
- * @return true if the other identifier cannot be equal to this one.
- */
- protected boolean fastNonEqual(final InstanceIdentifier<?> other) {
- return false;
- }
-
- @Override
- public final String toString() {
- return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
- }
-
- /**
- * Add class-specific toString attributes.
- *
- * @param toStringHelper ToStringHelper instance
- * @return ToStringHelper instance which was passed in
- */
- protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
- return toStringHelper.add("targetType", targetType).add("path", Iterables.toString(pathArguments));
- }
-
- /**
- * Return an instance identifier trimmed at the first occurrence of a
- * specific component type.
- *
- * For example let's say an instance identifier was built like so,
- * <pre>
- * identifier = InstanceIdentifierBuilder.builder(Nodes.class).child(Node.class, new NodeKey(new NodeId("openflow:1")).build();
- * </pre>
- *
- * And you wanted to obtain the Instance identifier which represented Nodes you would do it like so,
- *
- * <pre>
- * identifier.firstIdentifierOf(Nodes.class)
- * </pre>
- *
- * @param type component type
- * @return trimmed instance identifier, or null if the component type
- * is not present.
- */
- public final <I extends TreeNode> InstanceIdentifier<I> firstIdentifierOf(final Class<I> type) {
- int i = 1;
- for (final TreeArgument a : pathArguments) {
- if (type.equals(a.getType())) {
- @SuppressWarnings("unchecked")
- final InstanceIdentifier<I> ret = (InstanceIdentifier<I>) internalCreate(Iterables.limit(pathArguments, i));
- return ret;
- }
-
- ++i;
- }
-
- return null;
- }
-
- /**
- * Return the key associated with the first component of specified type in
- * an identifier.
- *
- * @param listItem component type
- * @param listKey component key type
- * @return key associated with the component, or null if the component type
- * is not present.
- *
- * @deprecated Use {@link #firstKeyOf(Class)} instead.
- */
- @Deprecated
- public final <N extends TreeNode, K> K firstKeyOf(final Class<N> listItem,
- final Class<K> listKey) {
- return firstKeyOf(listItem);
- }
-
- /**
- * Return the key associated with the first component of specified type in
- * an identifier.
- *
- * @param listItem component type
- * @return key associated with the component, or null if the component type
- * is not present.
- */
-
- public final <N extends TreeNode, K> K firstKeyOf(final Class<N> listItem) {
- for (final TreeArgument i : pathArguments) {
- if (listItem.equals(i.getType())) {
- @SuppressWarnings("unchecked")
- final K ret = ((IdentifiableItem<N, K>)i).getKey();
- return ret;
- }
- }
-
- return null;
- }
-
- /**
- * Check whether an identifier is contained in this identifier. This is a strict subtree check, which requires all
- * PathArguments to match exactly, e.g.
- *
- *
- * The contains method checks if the other identifier is fully contained within the current identifier. It does this
- * by looking at only the types of the path arguments and not by comparing the path arguments themselves.
- *
- * To illustrate here is an example which explains the working of this API.
- *
- * Let's say you have two instance identifiers as follows,
- *
- * this = /nodes/node/openflow:1
- * other = /nodes/node/openflow:2
- *
- * then this.contains(other) will return false.
- *
- * @param other
- * @return
- */
- @Override
- public final boolean contains(final InstanceIdentifier<? extends TreeNode> other) {
- requireNonNull(other, "other should not be null");
-
- final Iterator<?> lit = pathArguments.iterator();
- final Iterator<?> oit = other.pathArguments.iterator();
-
- while (lit.hasNext()) {
- if (!oit.hasNext()) {
- return false;
- }
-
- if (!lit.next().equals(oit.next())) {
- return false;
- }
- }
-
- return true;
- }
-
- /**
- * Check whether this instance identifier contains the other identifier after wildcard expansion. This is similar
- * to {@link #contains(InstanceIdentifier)}, with the exception that a wildcards are assumed to match the their
- * non-wildcarded PathArgument counterpart.
- *
- * @param other Identifier which should be checked for inclusion.
- * @return true if this identifier contains the other object
- */
- public final boolean containsWildcarded(final InstanceIdentifier<?> other) {
- requireNonNull(other, "other should not be null");
-
- final Iterator<TreeArgument> lit = pathArguments.iterator();
- final Iterator<TreeArgument> oit = other.pathArguments.iterator();
-
- while (lit.hasNext()) {
- if (!oit.hasNext()) {
- return false;
- }
-
- final TreeArgument la = lit.next();
- final TreeArgument oa = oit.next();
-
- if (!la.getType().equals(oa.getType())) {
- return false;
- }
- if (la instanceof IdentifiableItem<?, ?> && oa instanceof IdentifiableItem<?, ?> && !la.equals(oa)) {
- return false;
- }
- }
-
- return true;
- }
-
- /**
- * Create a builder rooted at this key.
- *
- * @return A builder instance
- */
- public InstanceIdentifierBuilder<T> builder() {
- return new InstanceIdentifierBuilderImpl<T>(new Item<T>(targetType), pathArguments, hash, isWildcarded());
- }
-
- private InstanceIdentifier<?> childIdentifier(final TreeArgument arg) {
- return trustedCreate(arg, Iterables.concat(pathArguments, Collections.singleton(arg)), HashCodeBuilder.nextHashCode(hash, arg), isWildcarded());
- }
-
- @SuppressWarnings("unchecked")
- public final <N extends TreeChildNode<? super T, ?>> InstanceIdentifier<N> child(final Class<N> container) {
- final TreeArgument arg = new Item<>(container);
- return (InstanceIdentifier<N>) childIdentifier(arg);
- }
-
- @SuppressWarnings("unchecked")
- public final <N extends TreeChildNode<? super T, ?>, K> KeyedInstanceIdentifier<N, K> child(
- final Class<N> listItem, final K listKey) {
- final TreeArgument arg = new IdentifiableItem<>(listItem, listKey);
- return (KeyedInstanceIdentifier<N, K>) childIdentifier(arg);
- }
-
- @SuppressWarnings("unchecked")
- public final <N extends TreeNode & Augmentation<? super T>> InstanceIdentifier<N> augmentation(
- final Class<N> container) {
- final TreeArgument arg = new Item<>(container);
- return (InstanceIdentifier<N>) childIdentifier(arg);
- }
-
- @Deprecated
- private List<TreeArgument> legacyCache;
-
- /**
- * @deprecated Use {@link #getPathArguments()} instead.
- */
- @Deprecated
- public final List<TreeArgument> getPath() {
- if (legacyCache == null) {
- legacyCache = ImmutableList.copyOf(pathArguments);
- }
-
- return legacyCache;
- }
-
- /**
- * Create a new InstanceIdentifierBuilder given a base InstanceIdentifier
- *
- * @param base
- * @param <T>
- * @return
- *
- * @deprecated Use {@link #builder()} instead.
- */
- @Deprecated
- public static <T extends TreeNode> InstanceIdentifierBuilder<T> builder(final InstanceIdentifier<T> base) {
- return base.builder();
- }
-
- /**
- * Create an InstanceIdentifierBuilder for a specific type of InstanceIdentifier as specified by container
- *
- * @param container
- * @param <T>
- * @return
- */
- public static <T extends TreeChildNode<? extends TreeRoot, ?>> InstanceIdentifierBuilder<T> builder(
- final Class<T> container) {
- return new InstanceIdentifierBuilderImpl<T>().addNode(container);
- }
-
- /**
- * Create an InstanceIdentifierBuilder for a specific type of InstanceIdentifier which represents an IdentifiableItem
- *
- * @param listItem
- * @param listKey
- * @param <N>
- * @param <K>
- * @return
- */
-
- public static <N extends TreeChildNode<? extends TreeRoot, ?>, K> InstanceIdentifierBuilder<N> builder(
- final Class<N> listItem, final K listKey) {
- return new InstanceIdentifierBuilderImpl<N>().addNode(listItem, listKey);
- }
-
- /**
- * Create an instance identifier for a very specific object type. This method
- * implements {@link #create(Iterable)} semantics, except it is used by internal
- * callers, which have assured that the argument is an immutable Iterable.
- *
- *
- * @param pathArguments The path to a specific node in the data tree
- * @return InstanceIdentifier instance
- * @throws IllegalArgumentException if pathArguments is empty or
- * contains a null element.
- */
- private static InstanceIdentifier<?> internalCreate(final Iterable<TreeArgument> pathArguments) {
- final Iterator<? extends TreeArgument> it = requireNonNull(pathArguments, "pathArguments may not be null").iterator();
- final HashCodeBuilder<TreeArgument> hashBuilder = new HashCodeBuilder<>();
- boolean wildcard = false;
- TreeArgument a = null;
-
- while (it.hasNext()) {
- a = it.next();
- Preconditions.checkArgument(a != null, "pathArguments may not contain null elements");
-
- // TODO: sanity check ChildTreeNode<>;
- hashBuilder.addArgument(a);
-
- if (Identifiable.class.isAssignableFrom(a.getType()) && !(a instanceof IdentifiableItem<?, ?>)) {
- wildcard = true;
- }
- }
- Preconditions.checkArgument(a != null, "pathArguments may not be empty");
-
- return trustedCreate(a, pathArguments, hashBuilder.build(), wildcard);
- }
-
- /**
- * Create an instance identifier for a very specific object type.
- *
- * Example
- * <pre>
- * List<PathArgument> path = Arrays.asList(new Item(Nodes.class))
- * new InstanceIdentifier(path);
- * </pre>
- *
- * @param pathArguments The path to a specific node in the data tree
- * @return InstanceIdentifier instance
- * @throws IllegalArgumentException if pathArguments is empty or
- * contains a null element.
- */
- public static InstanceIdentifier<?> create(final Iterable<? extends TreeArgument> pathArguments) {
- if (pathArguments instanceof ImmutableCollection<?>) {
- @SuppressWarnings("unchecked")
- final Iterable<TreeArgument> immutableArguments = (Iterable<TreeArgument>) pathArguments;
- return internalCreate(immutableArguments);
- } else {
- return internalCreate(ImmutableList.copyOf(pathArguments));
- }
- }
-
- /**
- * Create an instance identifier for a very specific object type.
- *
- * For example
- * <pre>
- * new InstanceIdentifier(Nodes.class)
- * </pre>
- * would create an InstanceIdentifier for an object of type Nodes
- *
- * @param type The type of the object which this instance identifier represents
- * @return InstanceIdentifier instance
- */
- @SuppressWarnings("unchecked")
- public static <T extends TreeNode> InstanceIdentifier<T> create(final Class<T> type) {
- return (InstanceIdentifier<T>) create(Collections.<TreeArgument> singletonList(new Item<>(type)));
- }
-
- /**
- * Return the key associated with the last component of the specified identifier.
- *
- * @param id instance identifier
- * @return key associated with the last component
- * @throws IllegalArgumentException if the supplied identifier type cannot have a key.
- * @throws NullPointerException if id is null.
- */
-
- public static <N extends TreeNode, K> K keyOf(
- final InstanceIdentifier<N> id) {
- requireNonNull(id);
- Preconditions.checkArgument(id instanceof KeyedInstanceIdentifier, "%s does not have a key", id);
-
- @SuppressWarnings("unchecked")
- final K ret = ((KeyedInstanceIdentifier<N, K>)id).getKey();
- return ret;
- }
-
- @SuppressWarnings({ "unchecked", "rawtypes" })
- static InstanceIdentifier<?> trustedCreate(final TreeArgument arg, final Iterable<TreeArgument> pathArguments, final int hash, boolean wildcarded) {
- if (Identifiable.class.isAssignableFrom(arg.getType()) && !(wildcarded)) {
- Object key = null;
- if (arg instanceof IdentifiableItem<?, ?>) {
- key = ((IdentifiableItem<?, ?>) arg).getKey();
- } else {
- wildcarded = true;
- }
-
- return new KeyedInstanceIdentifier(arg.getType(), pathArguments, wildcarded, hash, key);
- } else {
- return new InstanceIdentifier(arg.getType(), pathArguments, wildcarded, hash);
- }
- }
-
- private void writeObject(final java.io.ObjectOutputStream out) throws IOException {
- out.defaultWriteObject();
- out.writeInt(Iterables.size(pathArguments));
- for (Object o : pathArguments) {
- out.writeObject(o);
- }
- }
-
- private void readObject(final java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {
- in.defaultReadObject();
-
- final int size = in.readInt();
- final List<TreeArgument> args = new ArrayList<>(size);
- for (int i = 0; i < size; ++i) {
- args.add((TreeArgument) in.readObject());
- }
-
- try {
- PATHARGUMENTS_FIELD.set(this, ImmutableList.copyOf(args));
- } catch (IllegalArgumentException | IllegalAccessException e) {
- throw new IOException(e);
- }
- }
-}
Code Review / mdsal.git / blobdiff