2 * Copyright (c) 2017 Pantheon Technologies, s.r.o. and others. All rights reserved.
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
8 package org.opendaylight.yangtools.yang.parser.rfc7950.stmt.length;
10 import com.google.common.collect.ImmutableList;
11 import com.google.common.collect.Iterables;
12 import java.math.BigInteger;
13 import java.util.ArrayList;
14 import java.util.Iterator;
15 import java.util.List;
16 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
17 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
18 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
19 import org.opendaylight.yangtools.yang.model.api.stmt.LengthEffectiveStatement;
20 import org.opendaylight.yangtools.yang.model.api.stmt.LengthStatement;
21 import org.opendaylight.yangtools.yang.model.api.stmt.UnresolvedNumber;
22 import org.opendaylight.yangtools.yang.model.api.stmt.ValueRange;
23 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.ArgumentUtils;
24 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
25 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
26 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
27 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
28 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
29 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
31 public final class LengthStatementSupport
32 extends BaseStatementSupport<List<ValueRange>, LengthStatement, LengthEffectiveStatement> {
33 private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
35 .addOptional(YangStmtMapping.DESCRIPTION)
36 .addOptional(YangStmtMapping.ERROR_APP_TAG)
37 .addOptional(YangStmtMapping.ERROR_MESSAGE)
38 .addOptional(YangStmtMapping.REFERENCE)
40 private static final LengthStatementSupport INSTANCE = new LengthStatementSupport();
42 private LengthStatementSupport() {
43 super(YangStmtMapping.LENGTH, CopyPolicy.CONTEXT_INDEPENDENT);
46 public static LengthStatementSupport getInstance() {
51 public ImmutableList<ValueRange> parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
52 final List<ValueRange> ranges = new ArrayList<>();
54 for (final String singleRange : ArgumentUtils.PIPE_SPLITTER.split(value)) {
55 final Iterator<String> boundaries = ArgumentUtils.TWO_DOTS_SPLITTER.split(singleRange).iterator();
56 final Number min = parseIntegerConstraintValue(ctx, boundaries.next());
59 if (boundaries.hasNext()) {
60 max = parseIntegerConstraintValue(ctx, boundaries.next());
62 // if min larger than max then error
63 SourceException.throwIf(ArgumentUtils.compareNumbers(min, max) == 1, ctx.getStatementSourceReference(),
64 "Length constraint %s has descending order of boundaries; should be ascending.", singleRange);
65 SourceException.throwIf(boundaries.hasNext(), ctx.getStatementSourceReference(),
66 "Wrong number of boundaries in length constraint %s.", singleRange);
71 // some of intervals overlapping
72 InferenceException.throwIf(ranges.size() > 1
73 && ArgumentUtils.compareNumbers(min, Iterables.getLast(ranges).upperBound()) != 1,
74 ctx.getStatementSourceReference(), "Some of the length ranges in %s are not disjoint", value);
75 ranges.add(ValueRange.of(min, max));
78 return ImmutableList.copyOf(ranges);
82 protected SubstatementValidator getSubstatementValidator() {
83 return SUBSTATEMENT_VALIDATOR;
87 protected LengthStatement createDeclared(final StmtContext<List<ValueRange>, LengthStatement, ?> ctx,
88 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
89 return new RegularLengthStatement(ctx.coerceRawStatementArgument(), ctx.coerceStatementArgument(),
94 protected LengthStatement createEmptyDeclared(final StmtContext<List<ValueRange>, LengthStatement, ?> ctx) {
95 return new EmptyLengthStatement(ctx.coerceRawStatementArgument(), ctx.coerceStatementArgument());
99 protected LengthEffectiveStatement createEffective(final Current<List<ValueRange>, LengthStatement> stmt,
100 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
101 return substatements.isEmpty() ? new EmptyLengthEffectiveStatement(stmt.declared())
102 : new RegularLengthEffectiveStatement(stmt.declared(), substatements);
105 private static Number parseIntegerConstraintValue(final StmtContext<?, ?, ?> ctx, final String value) {
106 if ("max".equals(value)) {
107 return UnresolvedNumber.max();
109 if ("min".equals(value)) {
110 return UnresolvedNumber.min();
114 return new BigInteger(value);
115 } catch (final NumberFormatException e) {
116 throw new SourceException(ctx.getStatementSourceReference(), e, "Value %s is not a valid integer", value);