2 * Copyright (c) 2013 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.yangtools.yang.data.impl.schema.transform.base.parser;
10 import com.google.common.base.Preconditions;
11 import com.google.common.collect.Iterables;
13 import org.opendaylight.yangtools.yang.common.QName;
14 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
15 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
16 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
17 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
18 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeAttrBuilder;
19 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeBuilder;
20 import org.opendaylight.yangtools.yang.data.util.LeafInterner;
21 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
24 * Abstract(base) parser for LeafNodes, parses elements of type E.
26 * @param <E> type of elements to be parsed
28 public abstract class LeafNodeBaseParser<E> implements ExtensibleParser<NodeIdentifier, E, LeafNode<?>, LeafSchemaNode> {
30 private final BuildingStrategy<NodeIdentifier, LeafNode<?>> buildingStrategy;
32 public LeafNodeBaseParser() {
33 buildingStrategy = new SimpleLeafBuildingStrategy();
36 public LeafNodeBaseParser(final BuildingStrategy<NodeIdentifier, LeafNode<?>> buildingStrategy) {
37 this.buildingStrategy = buildingStrategy;
40 @SuppressWarnings("unchecked")
42 public final LeafNode<?> parse(final Iterable<E> elements, final LeafSchemaNode schema) {
43 final int size = Iterables.size(elements);
44 Preconditions.checkArgument(size == 1, "Elements mapped to leaf node illegal count: %s", size);
46 final E e = elements.iterator().next();
47 Object value = parseLeaf(e, schema);
49 NormalizedNodeAttrBuilder<YangInstanceIdentifier.NodeIdentifier, Object, LeafNode<Object>> leafBuilder =
50 Builders.leafBuilder(schema);
52 leafBuilder.withAttributes(getAttributes(e));
54 final BuildingStrategy rawBuildingStrat = buildingStrategy;
55 return LeafInterner.forSchema(schema).intern((LeafNode<?>)rawBuildingStrat.build(leafBuilder.withValue(value)));
60 * Parse the inner value of a LeafNode from element of type E.
62 * @param element to be parsed
63 * @param schema schema for leaf
64 * @return parsed element as an Object
66 protected abstract Object parseLeaf(E element, LeafSchemaNode schema);
70 * @param e element to be parsed
71 * @return attributes mapped to QNames
73 protected abstract Map<QName, String> getAttributes(E e);
76 public BuildingStrategy<NodeIdentifier, LeafNode<?>> getBuildingStrategy() {
77 return buildingStrategy;
80 public static class SimpleLeafBuildingStrategy implements BuildingStrategy<NodeIdentifier, LeafNode<?>> {
82 public LeafNode<?> build(final NormalizedNodeBuilder<NodeIdentifier, ?, LeafNode<?>> builder) {
83 return builder.build();
87 public void prepareAttributes(final Map<QName, String> attributes, final NormalizedNodeBuilder<NodeIdentifier, ?, LeafNode<?>> containerBuilder) {