yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/impl/YangParserImpl.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies, s.r.o. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.yangtools.yang.parser.impl;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.collect.ImmutableList;
  13 import java.io.IOException;
  14 import java.util.Collection;
  15 import java.util.List;
  16 import java.util.Map;
  17 import java.util.Set;
  18 import javax.xml.transform.TransformerException;
  19 import org.opendaylight.yangtools.yang.common.QName;
  20 import org.opendaylight.yangtools.yang.common.QNameModule;
  21 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  22 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  23 import org.opendaylight.yangtools.yang.model.parser.api.YangParser;
  24 import org.opendaylight.yangtools.yang.model.parser.api.YangParserException;
  25 import org.opendaylight.yangtools.yang.model.parser.api.YangSyntaxErrorException;
  26 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceRepresentation;
  27 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
  28 import org.opendaylight.yangtools.yang.model.repo.api.YinDomSchemaSource;
  29 import org.opendaylight.yangtools.yang.model.repo.api.YinTextSchemaSource;
  30 import org.opendaylight.yangtools.yang.model.repo.api.YinXmlSchemaSource;
  31 import org.opendaylight.yangtools.yang.parser.rfc7950.repo.YangStatementStreamSource;
  32 import org.opendaylight.yangtools.yang.parser.rfc7950.repo.YinStatementStreamSource;
  33 import org.opendaylight.yangtools.yang.parser.rfc7950.repo.YinTextToDomTransformer;
  34 import org.opendaylight.yangtools.yang.parser.spi.meta.ReactorException;
  35 import org.opendaylight.yangtools.yang.parser.spi.source.StatementStreamSource;
  36 import org.opendaylight.yangtools.yang.parser.stmt.reactor.CrossSourceStatementReactor.BuildAction;
  37 import org.xml.sax.SAXException;
  38
  39 final class YangParserImpl implements YangParser {
  40     private static final Collection<Class<? extends SchemaSourceRepresentation>> REPRESENTATIONS = ImmutableList.of(
  41         YangTextSchemaSource.class, YinDomSchemaSource.class, YinXmlSchemaSource.class, YinTextSchemaSource.class);
  42
  43     private final BuildAction buildAction;
  44
  45     YangParserImpl(final BuildAction buildAction) {
  46         this.buildAction = requireNonNull(buildAction);
  47     }
  48
  49     @Override
  50     public Collection<Class<? extends SchemaSourceRepresentation>> supportedSourceRepresentations() {
  51         return REPRESENTATIONS;
  52     }
  53
  54     @Override
  55     public Set<QName> supportedStatements() {
  56         // TODO Auto-generated method stub
  57         return null;
  58     }
  59
  60     @Override
  61     public YangParser addSource(final SchemaSourceRepresentation source) throws IOException, YangSyntaxErrorException {
  62         buildAction.addSources(sourceToStatementStream(source));
  63         return null;
  64     }
  65
  66     @Override
  67     public YangParser addLibSource(final SchemaSourceRepresentation source) throws IOException,
  68             YangSyntaxErrorException {
  69         buildAction.addLibSources(sourceToStatementStream(source));
  70         return null;
  71     }
  72
  73     @Override
  74     public YangParser setSupportedFeatures(final Set<QName> supportedFeatures) {
  75         buildAction.setSupportedFeatures(supportedFeatures);
  76         return this;
  77     }
  78
  79     @Override
  80     public YangParser setModulesWithSupportedDeviations(
  81             final Map<QNameModule, Set<QNameModule>> modulesDeviatedByModules) {
  82         buildAction.setModulesWithSupportedDeviations(modulesDeviatedByModules);
  83         return this;
  84     }
  85
  86     @Override
  87     public List<DeclaredStatement<?>> buildDeclaredModel() throws YangParserException {
  88         try {
  89             return buildAction.build().getRootStatements();
  90         } catch (ReactorException e) {
  91             throw decodeReactorException(e);
  92         }
  93     }
  94
  95     @Override
  96     public SchemaContext buildSchemaContext() throws YangParserException {
  97         try {
  98             return buildAction.buildEffective();
  99         } catch (ReactorException e) {
 100             throw decodeReactorException(e);
 101         }
 102     }
 103
 104     private static YangParserException decodeReactorException(final ReactorException reported) {
 105         // FIXME: map exception in some reasonable manner
 106         return new YangParserException("Failed to assemble sources", reported);
 107     }
 108
 109     private static StatementStreamSource sourceToStatementStream(final SchemaSourceRepresentation source)
 110             throws IOException, YangSyntaxErrorException {
 111         requireNonNull(source);
 112         if (source instanceof YangTextSchemaSource) {
 113             return YangStatementStreamSource.create((YangTextSchemaSource) source);
 114         } else if (source instanceof YinDomSchemaSource) {
 115             return YinStatementStreamSource.create((YinDomSchemaSource) source);
 116         } else if (source instanceof YinTextSchemaSource) {
 117             try {
 118                 return YinStatementStreamSource.create(YinTextToDomTransformer.transformSource(
 119                     (YinTextSchemaSource) source));
 120             } catch (SAXException e) {
 121                 throw new YangSyntaxErrorException(source.getIdentifier(), 0, 0, "Failed to parse XML text", e);
 122             }
 123         } else if (source instanceof YinXmlSchemaSource) {
 124             try {
 125                 return YinStatementStreamSource.create((YinXmlSchemaSource) source);
 126             } catch (TransformerException e) {
 127                 throw new YangSyntaxErrorException(source.getIdentifier(), 0, 0,
 128                     "Failed to assemble in-memory representation", e);
 129             }
 130         } else {
 131             throw new IllegalArgumentException("Unsupported source " + source);
 132         }
 133     }
 134 }