yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/path/PathStatementSupport.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.path;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.collect.ImmutableList;
  13 import org.opendaylight.yangtools.yang.model.api.PathExpression;
  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.PathEffectiveStatement;
  18 import org.opendaylight.yangtools.yang.model.api.stmt.PathStatement;
  19 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
  20 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  21 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  22
  23 public final class PathStatementSupport
  24         extends BaseStatementSupport<PathExpression, PathStatement, PathEffectiveStatement> {
  25     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
  26         YangStmtMapping.PATH).build();
  27     private static final PathStatementSupport LENIENT_INSTANCE = new PathStatementSupport(
  28         new PathExpressionParser.Lenient());
  29     private static final PathStatementSupport STRICT_INSTANCE = new PathStatementSupport(
  30         new PathExpressionParser());
  31
  32     private final PathExpressionParser parser;
  33
  34     private PathStatementSupport(final PathExpressionParser parser) {
  35         super(YangStmtMapping.PATH);
  36         this.parser = requireNonNull(parser);
  37     }
  38
  39     public static PathStatementSupport lenientInstance() {
  40         return LENIENT_INSTANCE;
  41     }
  42
  43     public static PathStatementSupport strictInstance() {
  44         return STRICT_INSTANCE;
  45     }
  46
  47     @Override
  48     public PathExpression parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  49         return parser.parseExpression(ctx, value);
  50     }
  51
  52     @Override
  53     protected SubstatementValidator getSubstatementValidator() {
  54         return SUBSTATEMENT_VALIDATOR;
  55     }
  56
  57     @Override
  58     protected PathStatement createDeclared(final StmtContext<PathExpression, PathStatement, ?> ctx,
  59             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  60         return new RegularPathStatement(ctx.coerceStatementArgument(), substatements);
  61     }
  62
  63     @Override
  64     protected PathStatement createEmptyDeclared(final StmtContext<PathExpression, PathStatement, ?> ctx) {
  65         return new EmptyPathStatement(ctx.coerceStatementArgument());
  66     }
  67
  68     @Override
  69     protected PathEffectiveStatement createEffective(
  70             final StmtContext<PathExpression, PathStatement, PathEffectiveStatement> ctx,
  71             final PathStatement declared, final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  72         return new RegularPathEffectiveStatement(declared, substatements);
  73     }
  74
  75     @Override
  76     protected PathEffectiveStatement createEmptyEffective(
  77             final StmtContext<PathExpression, PathStatement, PathEffectiveStatement> ctx,
  78             final PathStatement declared) {
  79         return new EmptyPathEffectiveStatement(declared);
  80     }
  81 }