2 * Copyright (c) 2015 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
9 package org.opendaylight.yangtools.yang.parser.spi.meta;
11 import com.google.common.base.Optional;
12 import com.google.common.base.Predicates;
13 import com.google.common.collect.Collections2;
14 import com.google.common.collect.ImmutableList;
15 import com.google.common.collect.Iterables;
16 import java.util.Collection;
17 import javax.annotation.Nonnull;
18 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
19 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
20 import org.opendaylight.yangtools.yang.model.api.meta.StatementSource;
23 * Utility abstract base class for implementing declared statements.
25 * @param <A> Argument type.
27 public abstract class AbstractDeclaredStatement<A> implements DeclaredStatement<A> {
28 private final A argument;
29 private final String rawArgument;
30 private final ImmutableList<? extends DeclaredStatement<?>> substatements;
31 private final StatementDefinition definition;
32 private final StatementSource source;
34 protected AbstractDeclaredStatement(final StmtContext<A,?,?> context) {
35 rawArgument = context.rawStatementArgument();
36 argument = context.getStatementArgument();
37 source = context.getStatementSource();
38 definition = context.getPublicDefinition();
40 * Perform an explicit copy, because Collections2.transform() is lazily transformed and retains pointer to
41 * original collection, which may contains references to mutable context.
43 substatements = ImmutableList.copyOf(Collections2.transform(context.declaredSubstatements(),
44 StmtContext::buildDeclared));
47 protected final <S extends DeclaredStatement<?>> S firstDeclared(final Class<S> type) {
48 final Optional<? extends DeclaredStatement<?>> declaredSubstmt = Iterables.tryFind(substatements,
49 Predicates.instanceOf(type));
50 return declaredSubstmt.isPresent() ? type.cast(declaredSubstmt.get()) : null;
54 public String rawArgument() {
65 public StatementDefinition statementDefinition() {
71 public Collection<? extends DeclaredStatement<?>> declaredSubstatements() {
77 public StatementSource getStatementSource() {
81 @SuppressWarnings("unchecked")
82 protected final <S extends DeclaredStatement<?>> Collection<? extends S> allDeclared(final Class<S> type) {
83 return Collection.class.cast(Collections2.filter(substatements, Predicates.instanceOf(type)));