yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/when/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.when;
   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.DeclaredStatement;
  16 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  17 import org.opendaylight.yangtools.yang.model.api.stmt.WhenEffectiveStatement;
  18 import org.opendaylight.yangtools.yang.model.api.stmt.WhenStatement;
  19 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
  20 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.XPathSupport;
  21 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
  22 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  23 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  24 import org.opendaylight.yangtools.yang.xpath.api.YangXPathExpression.QualifiedBound;
  25
  26 public final class WhenStatementSupport
  27         extends BaseStatementSupport<QualifiedBound, WhenStatement, WhenEffectiveStatement> {
  28     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
  29         YangStmtMapping.WHEN)
  30         .addOptional(YangStmtMapping.DESCRIPTION)
  31         .addOptional(YangStmtMapping.REFERENCE)
  32         .build();
  33
  34     private final @NonNull XPathSupport xpathSupport;
  35
  36     private WhenStatementSupport(final XPathSupport xpathSupport) {
  37         super(YangStmtMapping.WHEN);
  38         this.xpathSupport = requireNonNull(xpathSupport);
  39     }
  40
  41     public static WhenStatementSupport createInstance(final XPathSupport xpathSupport) {
  42         return new WhenStatementSupport(xpathSupport);
  43     }
  44
  45     @Override
  46     public QualifiedBound parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  47         return xpathSupport.parseXPath(ctx, value);
  48     }
  49
  50     @Override
  51     protected SubstatementValidator getSubstatementValidator() {
  52         return SUBSTATEMENT_VALIDATOR;
  53     }
  54
  55     @Override
  56     protected WhenStatement createDeclared(final StmtContext<QualifiedBound, WhenStatement, ?> ctx,
  57             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  58         return new RegularWhenStatement(ctx.coerceRawStatementArgument(), ctx.coerceStatementArgument(), substatements);
  59     }
  60
  61     @Override
  62     protected WhenStatement createEmptyDeclared(final StmtContext<QualifiedBound, WhenStatement, ?> ctx) {
  63         return new EmptyWhenStatement(ctx.coerceRawStatementArgument(), ctx.coerceStatementArgument());
  64     }
  65
  66     @Override
  67     protected WhenEffectiveStatement createEffective(final Current<QualifiedBound, WhenStatement> stmt,
  68             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  69         return substatements.isEmpty() ? new EmptyWhenEffectiveStatement(stmt.declared())
  70             : new RegularWhenEffectiveStatement(stmt.declared(), substatements);
  71     }
  72 }