yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/uses/UsesStatementSupport.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.rfc7950.stmt.uses;
   9
  10 import java.util.Collection;
  11 import org.opendaylight.yangtools.yang.common.QName;
  12 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  13 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  14 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
  15 import org.opendaylight.yangtools.yang.parser.spi.GroupingNamespace;
  16 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractQNameStatementSupport;
  17 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
  18 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
  19 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
  20 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
  21 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
  22 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
  23 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  24 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
  25 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
  26 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  27 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  28 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 public final class UsesStatementSupport extends
  33         AbstractQNameStatementSupport<UsesStatement, EffectiveStatement<QName, UsesStatement>> {
  34     private static final Logger LOG = LoggerFactory.getLogger(UsesStatementSupport.class);
  35     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
  36         .USES)
  37         .addAny(YangStmtMapping.AUGMENT)
  38         .addOptional(YangStmtMapping.DESCRIPTION)
  39         .addAny(YangStmtMapping.IF_FEATURE)
  40         .addAny(YangStmtMapping.REFINE)
  41         .addOptional(YangStmtMapping.REFERENCE)
  42         .addOptional(YangStmtMapping.STATUS)
  43         .addOptional(YangStmtMapping.WHEN)
  44         .build();
  45     private static final UsesStatementSupport INSTANCE = new UsesStatementSupport();
  46
  47     private UsesStatementSupport() {
  48         super(YangStmtMapping.USES);
  49     }
  50
  51     public static UsesStatementSupport getInstance() {
  52         return INSTANCE;
  53     }
  54
  55     @Override
  56     public QName parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  57         return StmtContextUtils.parseNodeIdentifier(ctx, value);
  58     }
  59
  60     @Override
  61     public void onFullDefinitionDeclared(
  62             final Mutable<QName, UsesStatement, EffectiveStatement<QName, UsesStatement>> usesNode) {
  63         if (!usesNode.isSupportedByFeatures()) {
  64             return;
  65         }
  66         super.onFullDefinitionDeclared(usesNode);
  67
  68         final ModelActionBuilder usesAction = usesNode.newInferenceAction(ModelProcessingPhase.EFFECTIVE_MODEL);
  69         final QName groupingName = usesNode.getStatementArgument();
  70
  71         final Prerequisite<StmtContext<?, ?, ?>> sourceGroupingPre = usesAction.requiresCtx(usesNode,
  72                 GroupingNamespace.class, groupingName, ModelProcessingPhase.EFFECTIVE_MODEL);
  73         final Prerequisite<? extends StmtContext.Mutable<?, ?, ?>> targetNodePre = usesAction.mutatesEffectiveCtx(
  74                 usesNode.getParentContext());
  75
  76         usesAction.apply(new InferenceAction() {
  77
  78             @Override
  79             public void apply(final InferenceContext ctx) {
  80                 final StatementContextBase<?, ?, ?> targetNodeStmtCtx =
  81                         (StatementContextBase<?, ?, ?>) targetNodePre.resolve(ctx);
  82                 final StatementContextBase<?, ?, ?> sourceGrpStmtCtx =
  83                         (StatementContextBase<?, ?, ?>) sourceGroupingPre.resolve(ctx);
  84
  85                 try {
  86                     UsesStatementImpl.copyFromSourceToTarget(sourceGrpStmtCtx, targetNodeStmtCtx, usesNode);
  87                     UsesStatementImpl.resolveUsesNode(usesNode, targetNodeStmtCtx);
  88                     StmtContextUtils.validateIfFeatureAndWhenOnListKeys(usesNode);
  89                 } catch (final SourceException e) {
  90                     LOG.warn(e.getMessage(), e);
  91                     throw e;
  92                 }
  93             }
  94
  95             @Override
  96             public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
  97                 InferenceException.throwIf(failed.contains(sourceGroupingPre),
  98                         usesNode.getStatementSourceReference(), "Grouping '%s' was not resolved.", groupingName);
  99                 throw new InferenceException("Unknown error occurred.", usesNode.getStatementSourceReference());
 100             }
 101         });
 102     }
 103
 104     @Override
 105     public UsesStatement createDeclared(final StmtContext<QName, UsesStatement, ?> ctx) {
 106         return new UsesStatementImpl(ctx);
 107     }
 108
 109     @Override
 110     public EffectiveStatement<QName, UsesStatement> createEffective(
 111             final StmtContext<QName, UsesStatement, EffectiveStatement<QName, UsesStatement>> ctx) {
 112         return new UsesEffectiveStatementImpl(ctx);
 113     }
 114
 115     @Override
 116     protected SubstatementValidator getSubstatementValidator() {
 117         return SUBSTATEMENT_VALIDATOR;
 118     }
 119 }