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.XPathSupport;
  20 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
  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 AbstractStatementSupport<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         // Note: if we end up binding expressions, this needs to become declaredCopy()
  38         super(YangStmtMapping.WHEN, StatementPolicy.contextIndependent());
  39         this.xpathSupport = requireNonNull(xpathSupport);
  40     }
  41
  42     public static WhenStatementSupport createInstance(final XPathSupport xpathSupport) {
  43         return new WhenStatementSupport(xpathSupport);
  44     }
  45
  46     @Override
  47     public QualifiedBound parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  48         return xpathSupport.parseXPath(ctx, value);
  49     }
  50
  51     @Override
  52     protected SubstatementValidator getSubstatementValidator() {
  53         return SUBSTATEMENT_VALIDATOR;
  54     }
  55
  56     @Override
  57     protected WhenStatement createDeclared(final StmtContext<QualifiedBound, WhenStatement, ?> ctx,
  58             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  59         return new RegularWhenStatement(ctx.getRawArgument(), ctx.getArgument(), substatements);
  60     }
  61
  62     @Override
  63     protected WhenStatement createEmptyDeclared(final StmtContext<QualifiedBound, WhenStatement, ?> ctx) {
  64         return new EmptyWhenStatement(ctx.getRawArgument(), ctx.getArgument());
  65     }
  66
  67     @Override
  68     protected WhenEffectiveStatement createEffective(final Current<QualifiedBound, WhenStatement> stmt,
  69             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  70         return substatements.isEmpty() ? new EmptyWhenEffectiveStatement(stmt.declared())
  71             : new RegularWhenEffectiveStatement(stmt.declared(), substatements);
  72     }
  73 }