yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/if_feature/IfFeatureStatementSupport.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.if_feature;
   9
  10 import static com.google.common.base.Verify.verifyNotNull;
  11
  12 import com.google.common.collect.ImmutableList;
  13 import java.util.Collection;
  14 import java.util.HashMap;
  15 import java.util.HashSet;
  16 import java.util.Map;
  17 import java.util.Set;
  18 import org.opendaylight.yangtools.yang.common.QName;
  19 import org.opendaylight.yangtools.yang.common.YangVersion;
  20 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  21 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  22 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  23 import org.opendaylight.yangtools.yang.model.api.stmt.IfFeatureEffectiveStatement;
  24 import org.opendaylight.yangtools.yang.model.api.stmt.IfFeatureExpr;
  25 import org.opendaylight.yangtools.yang.model.api.stmt.IfFeatureStatement;
  26 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
  27 import org.opendaylight.yangtools.yang.parser.spi.FeatureNamespace;
  28 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
  29 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
  30 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
  31 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
  32 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
  33 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
  34 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  35 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
  36 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
  37 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 public final class IfFeatureStatementSupport
  42         extends BaseStatementSupport<IfFeatureExpr, IfFeatureStatement, IfFeatureEffectiveStatement> {
  43     private static final Logger LOG = LoggerFactory.getLogger(IfFeatureStatementSupport.class);
  44     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
  45         YangStmtMapping.IF_FEATURE)
  46         .build();
  47     private static final IfFeatureStatementSupport INSTANCE = new IfFeatureStatementSupport();
  48
  49     private IfFeatureStatementSupport() {
  50         super(YangStmtMapping.IF_FEATURE, CopyPolicy.CONTEXT_INDEPENDENT);
  51     }
  52
  53     public static IfFeatureStatementSupport getInstance() {
  54         return INSTANCE;
  55     }
  56
  57     @Override
  58     public IfFeatureExpr parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  59         if (YangVersion.VERSION_1_1.equals(ctx.getRootVersion())) {
  60             return IfFeaturePredicateVisitor.parseIfFeatureExpression(ctx, value);
  61         }
  62         return IfFeatureExpr.isPresent(StmtContextUtils.parseNodeIdentifier(ctx, value));
  63     }
  64
  65     @Override
  66     public void onFullDefinitionDeclared(
  67             final Mutable<IfFeatureExpr, IfFeatureStatement, IfFeatureEffectiveStatement> stmt) {
  68         super.onFullDefinitionDeclared(stmt);
  69
  70         final ModelActionBuilder verifyFeatures = stmt.newInferenceAction(ModelProcessingPhase.EFFECTIVE_MODEL);
  71         final Map<Prerequisite<?>, QName> backRef = new HashMap<>();
  72         for (QName feature : stmt.coerceStatementArgument().getReferencedFeatures()) {
  73             backRef.put(verifyFeatures.requiresCtx(stmt, FeatureNamespace.class, feature,
  74                 ModelProcessingPhase.EFFECTIVE_MODEL), feature);
  75         }
  76
  77         verifyFeatures.apply(new InferenceAction() {
  78             @Override
  79             public void apply(final InferenceContext ctx) {
  80                 LOG.debug("Resolved all feature references in {}", backRef.values());
  81             }
  82
  83             @Override
  84             public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
  85                 final Set<QName> unresolvedFeatures = new HashSet<>();
  86                 for (Prerequisite<?> prereq : failed) {
  87                     unresolvedFeatures.add(verifyNotNull(backRef.get(prereq)));
  88                 }
  89
  90                 throw new InferenceException(stmt.getStatementSourceReference(),
  91                     "Failed to resolve feature references %s in \"%s\"", unresolvedFeatures,
  92                     stmt.rawStatementArgument());
  93             }
  94         });
  95     }
  96
  97     @Override
  98     protected SubstatementValidator getSubstatementValidator() {
  99         return SUBSTATEMENT_VALIDATOR;
 100     }
 101
 102     @Override
 103     protected IfFeatureStatement createDeclared(final StmtContext<IfFeatureExpr, IfFeatureStatement, ?> ctx,
 104             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
 105         return new RegularIfFeatureStatement(ctx.coerceRawStatementArgument(), ctx.coerceStatementArgument(),
 106             substatements);
 107     }
 108
 109     @Override
 110     protected IfFeatureStatement createEmptyDeclared(final StmtContext<IfFeatureExpr, IfFeatureStatement, ?> ctx) {
 111         return new EmptyIfFeatureStatement(ctx.coerceRawStatementArgument(), ctx.coerceStatementArgument());
 112     }
 113
 114     @Override
 115     protected IfFeatureEffectiveStatement createEffective(
 116             final StmtContext<IfFeatureExpr, IfFeatureStatement, IfFeatureEffectiveStatement> ctx,
 117             final IfFeatureStatement declared, final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 118         return new RegularIfFeatureEffectiveStatement(declared, substatements);
 119     }
 120
 121     @Override
 122     protected IfFeatureEffectiveStatement createEmptyEffective(
 123             final StmtContext<IfFeatureExpr, IfFeatureStatement, IfFeatureEffectiveStatement> ctx,
 124             final IfFeatureStatement declared) {
 125         return new EmptyIfFeatureEffectiveStatement(declared);
 126     }
 127 }