parser/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/meta/WhenStatementSupport.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.meta;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.collect.ImmutableList;
  13 import org.eclipse.jdt.annotation.NonNull;
  14 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  15 import org.opendaylight.yangtools.yang.model.api.meta.DeclarationReference;
  16 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  17 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  18 import org.opendaylight.yangtools.yang.model.api.stmt.WhenEffectiveStatement;
  19 import org.opendaylight.yangtools.yang.model.api.stmt.WhenStatement;
  20 import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatementDecorators;
  21 import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatements;
  22 import org.opendaylight.yangtools.yang.model.ri.stmt.EffectiveStatements;
  23 import org.opendaylight.yangtools.yang.parser.api.YangParserConfiguration;
  24 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
  25 import org.opendaylight.yangtools.yang.parser.spi.meta.BoundStmtCtx;
  26 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
  27 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  28 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  29 import org.opendaylight.yangtools.yang.xpath.api.YangXPathExpression.QualifiedBound;
  30
  31 public final class WhenStatementSupport
  32         extends AbstractStatementSupport<QualifiedBound, WhenStatement, WhenEffectiveStatement> {
  33     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR =
  34         SubstatementValidator.builder(YangStmtMapping.WHEN)
  35             .addOptional(YangStmtMapping.DESCRIPTION)
  36             .addOptional(YangStmtMapping.REFERENCE)
  37             .build();
  38
  39     private final @NonNull XPathSupport xpathSupport;
  40
  41     public WhenStatementSupport(final XPathSupport xpathSupport, final YangParserConfiguration config) {
  42         // Note: if we end up binding expressions, this needs to become declaredCopy()
  43         super(YangStmtMapping.WHEN, StatementPolicy.contextIndependent(), config, SUBSTATEMENT_VALIDATOR);
  44         this.xpathSupport = requireNonNull(xpathSupport);
  45     }
  46
  47     @Override
  48     public QualifiedBound parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  49         return xpathSupport.parseXPath(ctx, value);
  50     }
  51
  52     @Override
  53     protected WhenStatement createDeclared(final BoundStmtCtx<QualifiedBound> ctx,
  54             final ImmutableList<DeclaredStatement<?>> substatements) {
  55         return DeclaredStatements.createWhen(ctx.getRawArgument(), ctx.getArgument(), substatements);
  56     }
  57
  58     @Override
  59     protected WhenStatement attachDeclarationReference(final WhenStatement stmt, final DeclarationReference reference) {
  60         return DeclaredStatementDecorators.decorateWhen(stmt, reference);
  61     }
  62
  63     @Override
  64     protected WhenEffectiveStatement createEffective(final Current<QualifiedBound, WhenStatement> stmt,
  65             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  66         return EffectiveStatements.createWhen(stmt.declared(), substatements);
  67     }
  68 }