2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
3 * This program and the accompanying materials are made available under the
4 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
5 * and is available at http://www.eclipse.org/legal/epl-v10.html
7 package org.opendaylight.yangtools.yang.parser.util;
9 import com.google.common.annotations.Beta;
10 import com.google.common.base.Charsets;
11 import com.google.common.io.ByteSource;
12 import com.google.common.util.concurrent.CheckedFuture;
13 import com.google.common.util.concurrent.Futures;
15 import java.io.IOException;
16 import java.io.InputStream;
18 import org.antlr.v4.runtime.tree.ParseTreeWalker;
19 import org.opendaylight.yangtools.antlrv4.code.gen.YangParser.YangContext;
20 import org.opendaylight.yangtools.yang.model.parser.api.YangSyntaxErrorException;
21 import org.opendaylight.yangtools.yang.model.repo.api.SchemaRepository;
22 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceException;
23 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
24 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceRegistry;
25 import org.opendaylight.yangtools.yang.model.repo.util.SchemaSourceTransformer;
26 import org.opendaylight.yangtools.yang.parser.impl.YangModelBasicValidationListener;
27 import org.opendaylight.yangtools.yang.parser.impl.YangParserImpl;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
32 * A {@link SchemaSourceTransformer} which handles translation of models from
33 * {@link YangTextSchemaSource} representation into {@link ASTSchemaSource}.
36 public final class TextToASTTransformer extends SchemaSourceTransformer<YangTextSchemaSource, ASTSchemaSource> {
37 public static final class TextToASTTransformation implements Transformation<YangTextSchemaSource, ASTSchemaSource> {
39 public CheckedFuture<ASTSchemaSource, SchemaSourceException> apply(final YangTextSchemaSource input) throws IOException, YangSyntaxErrorException {
40 try (InputStream is = input.openStream()) {
41 final YangContext ctx = YangParserImpl.parseYangSource(is);
42 LOG.debug("Model {} parsed successfully", input);
44 final ParseTreeWalker walker = new ParseTreeWalker();
45 final YangModelBasicValidationListener validator = new YangModelBasicValidationListener();
46 walker.walk(validator, ctx);
47 LOG.debug("Model {} validated successfully", input);
49 // Backwards compatibility
50 final String text = new ByteSource() {
52 public InputStream openStream() throws IOException {
53 return input.openStream();
55 }.asCharSource(Charsets.UTF_8).read();
57 return Futures.immediateCheckedFuture(ASTSchemaSource.create(input.getIdentifier().getName(), ctx, text));
62 public static final TextToASTTransformation TRANSFORMATION = new TextToASTTransformation();
63 private static final Logger LOG = LoggerFactory.getLogger(TextToASTTransformer.class);
65 private TextToASTTransformer(final SchemaRepository provider, final SchemaSourceRegistry consumer) {
66 super(provider, YangTextSchemaSource.class, consumer, ASTSchemaSource.class, TRANSFORMATION);
69 public static TextToASTTransformer create(final SchemaRepository provider, final SchemaSourceRegistry consumer) {
70 return new TextToASTTransformer(provider, consumer);