Optimize simple declared statements
[yangtools.git] / yang / yang-parser-rfc7950 / src / main / java / org / opendaylight / yangtools / yang / parser / rfc7950 / stmt / units / UnitsStatementSupport.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.units;
9
10 import com.google.common.collect.ImmutableList;
11 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
12 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
13 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
14 import org.opendaylight.yangtools.yang.model.api.stmt.UnitsEffectiveStatement;
15 import org.opendaylight.yangtools.yang.model.api.stmt.UnitsStatement;
16 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStringStatementSupport;
17 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
18 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
19
20 public final class UnitsStatementSupport
21         extends BaseStringStatementSupport<UnitsStatement, UnitsEffectiveStatement> {
22     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
23         YangStmtMapping.UNITS)
24         .build();
25     private static final UnitsStatementSupport INSTANCE = new UnitsStatementSupport();
26
27     private UnitsStatementSupport() {
28         super(YangStmtMapping.UNITS);
29     }
30
31     public static UnitsStatementSupport getInstance() {
32         return INSTANCE;
33     }
34
35     @Override
36     public String parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
37         return value;
38     }
39
40     @Override
41     protected SubstatementValidator getSubstatementValidator() {
42         return SUBSTATEMENT_VALIDATOR;
43     }
44
45     @Override
46     protected UnitsStatement createDeclared(final StmtContext<String, UnitsStatement, ?> ctx,
47             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
48         return new RegularUnitsStatement(ctx, substatements);
49     }
50
51     @Override
52     protected UnitsStatement createEmptyDeclared(final StmtContext<String, UnitsStatement, ?> ctx) {
53         return new EmptyUnitsStatement(ctx);
54     }
55
56     @Override
57     protected UnitsEffectiveStatement createEffective(
58             final StmtContext<String, UnitsStatement, UnitsEffectiveStatement> ctx,
59             final UnitsStatement declared, final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
60         return new RegularUnitsEffectiveStatement(declared, substatements);
61     }
62
63     @Override
64     protected UnitsEffectiveStatement createEmptyEffective(
65             final StmtContext<String, UnitsStatement, UnitsEffectiveStatement> ctx,
66             final UnitsStatement declared) {
67         return new EmptyUnitsEffectiveStatement(declared);
68     }
69 }