7f8cbd44980fcd69e105a0114f91dcc290e3dcc0
[yangtools.git] / 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.EffectiveStmtCtx.Current;
26 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
27 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
28 import org.opendaylight.yangtools.yang.xpath.api.YangXPathExpression.QualifiedBound;
29
30 public final class WhenStatementSupport
31         extends AbstractStatementSupport<QualifiedBound, WhenStatement, WhenEffectiveStatement> {
32     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR =
33         SubstatementValidator.builder(YangStmtMapping.WHEN)
34             .addOptional(YangStmtMapping.DESCRIPTION)
35             .addOptional(YangStmtMapping.REFERENCE)
36             .build();
37
38     private final @NonNull XPathSupport xpathSupport;
39
40     public WhenStatementSupport(final XPathSupport xpathSupport, final YangParserConfiguration config) {
41         // Note: if we end up binding expressions, this needs to become declaredCopy()
42         super(YangStmtMapping.WHEN, StatementPolicy.contextIndependent(), config, SUBSTATEMENT_VALIDATOR);
43         this.xpathSupport = requireNonNull(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 WhenStatement createDeclared(final StmtContext<QualifiedBound, WhenStatement, ?> ctx,
53             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
54         return DeclaredStatements.createWhen(ctx.getRawArgument(), ctx.getArgument(), substatements);
55     }
56
57     @Override
58     protected WhenStatement attachDeclarationReference(final WhenStatement stmt, final DeclarationReference reference) {
59         return DeclaredStatementDecorators.decorateWhen(stmt, reference);
60     }
61
62     @Override
63     protected WhenEffectiveStatement createEffective(final Current<QualifiedBound, WhenStatement> stmt,
64             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
65         return EffectiveStatements.createWhen(stmt.declared(), substatements);
66     }
67 }