yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/stmt/rfc6020/AugmentStatementImpl.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. 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.stmt.rfc6020;
   9
  10 import static org.opendaylight.yangtools.yang.parser.spi.SubstatementValidator.MAX;
  11 import com.google.common.base.Preconditions;
  12 import java.util.Collection;
  13 import java.util.regex.Pattern;
  14 import javax.annotation.Nonnull;
  15 import org.opendaylight.yangtools.yang.model.api.Rfc6020Mapping;
  16 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  17 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentStatement;
  18 import org.opendaylight.yangtools.yang.model.api.stmt.DataDefinitionStatement;
  19 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
  20 import org.opendaylight.yangtools.yang.parser.spi.SubstatementValidator;
  21 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractDeclaredStatement;
  22 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
  23 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
  24 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
  25 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
  26 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
  27 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  28 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
  29 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
  30 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  31 import org.opendaylight.yangtools.yang.parser.spi.source.StmtOrderingNamespace;
  32 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
  33 import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.AugmentEffectiveStatementImpl;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 public class AugmentStatementImpl extends AbstractDeclaredStatement<SchemaNodeIdentifier> implements AugmentStatement {
  38     private static final Logger LOG = LoggerFactory.getLogger(AugmentStatementImpl.class);
  39     private static final Pattern PATH_REL_PATTERN1 = Pattern.compile("\\.\\.?\\s*/(.+)");
  40     private static final Pattern PATH_REL_PATTERN2 = Pattern.compile("//.*");
  41     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator
  42             .builder(Rfc6020Mapping.AUGMENT)
  43             .add(Rfc6020Mapping.ANYXML, 0, MAX)
  44             .add(Rfc6020Mapping.CASE, 0, MAX)
  45             .add(Rfc6020Mapping.CHOICE, 0, MAX)
  46             .add(Rfc6020Mapping.CONTAINER, 0, MAX)
  47             .add(Rfc6020Mapping.DESCRIPTION, 0, 1)
  48             .add(Rfc6020Mapping.IF_FEATURE, 0, MAX)
  49             .add(Rfc6020Mapping.LEAF, 0, MAX)
  50             .add(Rfc6020Mapping.LEAF_LIST, 0, MAX)
  51             .add(Rfc6020Mapping.LIST, 0, MAX)
  52             .add(Rfc6020Mapping.REFERENCE, 0, 1)
  53             .add(Rfc6020Mapping.STATUS, 0, 1)
  54             .add(Rfc6020Mapping.USES, 0, MAX)
  55             .add(Rfc6020Mapping.WHEN, 0, 1)
  56             .build();
  57
  58     protected AugmentStatementImpl(final StmtContext<SchemaNodeIdentifier, AugmentStatement, ?> context) {
  59         super(context);
  60     }
  61
  62     public static class Definition extends
  63             AbstractStatementSupport<SchemaNodeIdentifier, AugmentStatement, EffectiveStatement<SchemaNodeIdentifier, AugmentStatement>> {
  64
  65         public Definition() {
  66             super(Rfc6020Mapping.AUGMENT);
  67         }
  68
  69         @Override
  70         public SchemaNodeIdentifier parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  71             Preconditions.checkArgument(!PATH_REL_PATTERN1.matcher(value).matches()
  72                 && !PATH_REL_PATTERN2.matcher(value).matches(),
  73                 "An argument for augment can be only absolute path; or descendant if used in uses");
  74
  75             return Utils.nodeIdentifierFromPath(ctx, value);
  76         }
  77
  78         @Override
  79         public AugmentStatement createDeclared(
  80                 final StmtContext<SchemaNodeIdentifier, AugmentStatement, ?> ctx) {
  81             return new AugmentStatementImpl(ctx);
  82         }
  83
  84         @Override
  85         public EffectiveStatement<SchemaNodeIdentifier, AugmentStatement> createEffective(
  86                 final StmtContext<SchemaNodeIdentifier, AugmentStatement, EffectiveStatement<SchemaNodeIdentifier, AugmentStatement>> ctx) {
  87             return new AugmentEffectiveStatementImpl(ctx);
  88         }
  89
  90         @Override
  91         public void onFullDefinitionDeclared(
  92                 final StmtContext.Mutable<SchemaNodeIdentifier, AugmentStatement, EffectiveStatement<SchemaNodeIdentifier, AugmentStatement>> augmentNode)
  93                 throws SourceException {
  94             SUBSTATEMENT_VALIDATOR.validate(augmentNode);
  95
  96             if (StmtContextUtils.isInExtensionBody(augmentNode)) {
  97                 return;
  98             }
  99
 100             final ModelActionBuilder augmentAction = augmentNode
 101                     .newInferenceAction(ModelProcessingPhase.EFFECTIVE_MODEL);
 102             final ModelActionBuilder.Prerequisite<StmtContext<SchemaNodeIdentifier, AugmentStatement, EffectiveStatement<SchemaNodeIdentifier, AugmentStatement>>> sourceCtxPrereq = augmentAction
 103                     .requiresCtx(augmentNode, ModelProcessingPhase.EFFECTIVE_MODEL);
 104             final Prerequisite<Mutable<?, ?, EffectiveStatement<?, ?>>> target = augmentAction.mutatesEffectiveCtx(getSearchRoot(augmentNode), SchemaNodeIdentifierBuildNamespace.class, augmentNode.getStatementArgument());
 105             augmentAction.apply(new ModelActionBuilder.InferenceAction() {
 106
 107                 @Override
 108                 public void apply() throws InferenceException {
 109                     final StatementContextBase<?, ?, ?> augmentTargetCtx = (StatementContextBase<?, ?, ?>) target.get();
 110
 111                     if (!AugmentUtils.isSupportedAugmentTarget(augmentTargetCtx) || StmtContextUtils.isInExtensionBody(augmentTargetCtx)) {
 112                         augmentNode.setIsSupportedToBuildEffective(false);
 113                         return;
 114                     }
 115                     final StatementContextBase<?, ?, ?> augmentSourceCtx = (StatementContextBase<?, ?, ?>) augmentNode;
 116                     try {
 117                         AugmentUtils.copyFromSourceToTarget(augmentSourceCtx,
 118                                 augmentTargetCtx);
 119                         augmentTargetCtx
 120                                 .addEffectiveSubstatement(augmentSourceCtx);
 121                         updateAugmentOrder(augmentSourceCtx);
 122                     } catch (SourceException e) {
 123                         LOG.warn(e.getMessage(), e);
 124                     }
 125
 126                 }
 127
 128                 private void updateAugmentOrder(
 129                         final StatementContextBase<?, ?, ?> augmentSourceCtx) {
 130                     Integer currentOrder = augmentSourceCtx
 131                             .getFromNamespace(StmtOrderingNamespace.class,
 132                                     Rfc6020Mapping.AUGMENT);
 133                     if (currentOrder == null) {
 134                         currentOrder = 1;
 135                     } else {
 136                         currentOrder++;
 137                     }
 138                     augmentSourceCtx.setOrder(currentOrder);
 139                     augmentSourceCtx.addToNs(StmtOrderingNamespace.class,
 140                             Rfc6020Mapping.AUGMENT, currentOrder);
 141                 }
 142
 143                 @Override
 144                 public void prerequisiteFailed(
 145                         final Collection<? extends ModelActionBuilder.Prerequisite<?>> failed)
 146                         throws InferenceException {
 147                     throw new InferenceException("Augment target not found: "
 148                             + augmentNode.getStatementArgument(), augmentNode
 149                             .getStatementSourceReference());
 150                 }
 151             });
 152         }
 153
 154         private static Mutable<?, ?, ?> getSearchRoot(final Mutable<?, ?, ?> augmentContext) {
 155             Mutable<?, ?, ?> parent = augmentContext.getParentContext();
 156             // Augment is in uses - we need to augment instantiated nodes in parent.
 157             if(Rfc6020Mapping.USES.equals(parent.getPublicDefinition())) {
 158                 return parent.getParentContext();
 159             }
 160             return parent;
 161         }
 162     }
 163
 164     @Nonnull
 165     @Override
 166     public SchemaNodeIdentifier getTargetNode() {
 167         return argument();
 168     }
 169
 170     @Override
 171     public Collection<? extends DataDefinitionStatement> getDataDefinitions() {
 172         return allDeclared(DataDefinitionStatement.class);
 173     }
 174 }