2 * Copyright (c) 2018 Pantheon Technologies, s.r.o. 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.model.export;
10 import static java.util.Objects.requireNonNull;
11 import static org.eclipse.jdt.annotation.DefaultLocation.PARAMETER;
12 import static org.eclipse.jdt.annotation.DefaultLocation.RETURN_TYPE;
14 import com.google.common.annotations.Beta;
15 import java.util.Iterator;
18 import java.util.Spliterator;
19 import java.util.Spliterators;
20 import java.util.stream.Collectors;
21 import java.util.stream.Stream;
22 import java.util.stream.StreamSupport;
23 import org.eclipse.jdt.annotation.NonNull;
24 import org.eclipse.jdt.annotation.NonNullByDefault;
25 import org.opendaylight.yangtools.concepts.Immutable;
26 import org.opendaylight.yangtools.yang.common.QNameModule;
27 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
28 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
31 * A YANG text snippet generated from a {@link DeclaredStatement}. Generated {@link #stream()} or {@link #iterator()}
32 * are guaranteed to not contain null nor empty strings. Furthermore, newlines are always emitted at the end
33 * on the generated string -- which can be checked with {@link #isEolString(String)} utility method.
36 * This allows individual strings to be escaped as needed and external indentation can be accounted for by inserting
37 * outer document indentation after the string which matched {@link #isEolString(String)} is emitted to the stream.
39 * @author Robert Varga
42 @NonNullByDefault({ PARAMETER, RETURN_TYPE })
43 public final class YangTextSnippet implements Immutable, Iterable<@NonNull String> {
44 private final Set<@NonNull StatementDefinition> ignoredStatements;
45 private final Map<QNameModule, @NonNull String> mapper;
46 private final DeclaredStatement<?> statement;
47 private final boolean omitDefaultStatements;
49 YangTextSnippet(final DeclaredStatement<?> statement, final Map<QNameModule, @NonNull String> namespaces,
50 final Set<@NonNull StatementDefinition> ignoredStatements, final boolean omitDefaultStatements) {
51 this.statement = requireNonNull(statement);
52 this.mapper = requireNonNull(namespaces);
53 this.ignoredStatements = requireNonNull(ignoredStatements);
54 this.omitDefaultStatements = omitDefaultStatements;
58 public Iterator<@NonNull String> iterator() {
59 return new YangTextSnippetIterator(statement, mapper, ignoredStatements, omitDefaultStatements);
63 @SuppressWarnings("null")
64 public Spliterator<@NonNull String> spliterator() {
65 return Spliterators.spliteratorUnknownSize(iterator(),
66 Spliterator.ORDERED | Spliterator.IMMUTABLE | Spliterator.NONNULL);
69 @SuppressWarnings("null")
70 public Stream<@NonNull String> stream() {
71 return StreamSupport.stream(spliterator(), false);
75 * Check if an emitted string contains End-Of-Line character.
77 * @param str String to be checked
78 * @return True if the string contains end of line.
79 * @throws NullPointerException if str is null
81 public static boolean isEolString(final String str) {
82 return !str.isEmpty() && str.charAt(str.length() - 1) == '\n';
86 @SuppressWarnings("null")
87 public String toString() {
88 return stream().collect(Collectors.joining());