2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.md.sal.dom.store.impl.tree;
12 import org.opendaylight.yangtools.concepts.Identifiable;
13 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
14 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.AugmentationIdentifier;
15 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.NodeIdentifierWithPredicates;
16 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.PathArgument;
17 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
18 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
20 import com.google.common.base.Function;
21 import com.google.common.base.Strings;
22 import com.google.common.collect.FluentIterable;
23 import com.google.common.collect.ImmutableList;
24 import com.google.common.primitives.UnsignedLong;
26 public final class StoreUtils {
27 private static final int STRINGTREE_INDENT = 4;
29 private final static Function<Identifiable<Object>, Object> EXTRACT_IDENTIFIER = new Function<Identifiable<Object>, Object>() {
31 public Object apply(final Identifiable<Object> input) {
32 return input.getIdentifier();
36 private StoreUtils() {
37 throw new UnsupportedOperationException("Utility class should not be instantiated");
41 * Suppressing warnings here allows us to fool the compiler enough
42 * such that we can reuse a single function for all applicable types
43 * and present it in a type-safe manner to our users.
45 @SuppressWarnings({ "unchecked", "rawtypes" })
46 public static <V> Function<Identifiable<V>, V> identifierExtractor() {
47 return (Function) EXTRACT_IDENTIFIER;
50 public static final UnsignedLong increase(final UnsignedLong original) {
51 return original.plus(UnsignedLong.ONE);
54 public static final InstanceIdentifier append(final InstanceIdentifier parent, final PathArgument arg) {
55 return new InstanceIdentifier(ImmutableList.<PathArgument> builder().addAll(parent.getPath()).add(arg).build());
58 public static <V> Set<V> toIdentifierSet(final Iterable<? extends Identifiable<V>> children) {
59 return FluentIterable.from(children).transform(StoreUtils.<V> identifierExtractor()).toSet();
62 public static String toStringTree(final NormalizedNode<?, ?> node) {
63 StringBuilder builder = new StringBuilder();
64 toStringTree(builder, node, 0);
65 return builder.toString();
68 private static void toStringTree(final StringBuilder builder, final NormalizedNode<?, ?> node, final int offset) {
69 final String prefix = Strings.repeat(" ", offset);
71 builder.append(prefix).append(toStringTree(node.getIdentifier()));
72 if (node instanceof NormalizedNodeContainer<?, ?, ?>) {
73 final NormalizedNodeContainer<?, ?, ?> container = (NormalizedNodeContainer<?, ?, ?>) node;
75 builder.append(" {\n");
76 for (NormalizedNode<?, ?> child : container.getValue()) {
77 toStringTree(builder, child, offset + STRINGTREE_INDENT);
80 builder.append(prefix).append('}');
82 builder.append(' ').append(node.getValue());
87 private static String toStringTree(final PathArgument identifier) {
88 if (identifier instanceof NodeIdentifierWithPredicates) {
89 StringBuilder builder = new StringBuilder();
90 builder.append(identifier.getNodeType().getLocalName());
91 builder.append(((NodeIdentifierWithPredicates) identifier).getKeyValues().values());
92 return builder.toString();
93 } else if (identifier instanceof AugmentationIdentifier) {
94 return "augmentation";
96 return identifier.getNodeType().getLocalName();