2 * Copyright (c) 2015 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.model.util.type;
10 import static com.google.common.base.Preconditions.checkState;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.base.Preconditions;
14 import com.google.common.base.Verify;
15 import com.google.common.collect.ImmutableList;
16 import com.google.common.collect.ImmutableRangeSet;
17 import com.google.common.collect.ImmutableRangeSet.Builder;
18 import com.google.common.collect.Range;
19 import com.google.common.collect.RangeSet;
20 import java.util.ArrayList;
21 import java.util.List;
22 import java.util.Optional;
23 import java.util.function.Function;
24 import org.eclipse.jdt.annotation.NonNull;
25 import org.opendaylight.yangtools.yang.model.api.ConstraintMetaDefinition;
26 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
27 import org.opendaylight.yangtools.yang.model.api.stmt.UnresolvedNumber;
28 import org.opendaylight.yangtools.yang.model.api.stmt.ValueRange;
29 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
30 import org.opendaylight.yangtools.yang.model.api.type.RangeRestrictedTypeDefinition;
32 public abstract class RangeRestrictedTypeBuilder<T extends RangeRestrictedTypeDefinition<T>>
33 extends AbstractRestrictedTypeBuilder<T> {
34 private ConstraintMetaDefinition constraint;
35 private List<ValueRange> ranges;
37 RangeRestrictedTypeBuilder(final T baseType, final SchemaPath path) {
38 super(baseType, path);
41 public final void setRangeConstraint(final @NonNull ConstraintMetaDefinition constraint,
42 final @NonNull List<ValueRange> ranges) {
43 checkState(this.ranges == null, "Range constraint already defined as %s %s", this.ranges, this.constraint);
45 this.constraint = requireNonNull(constraint);
46 this.ranges = ImmutableList.copyOf(ranges);
50 final <C extends Number & Comparable<C>> RangeConstraint<C> calculateRangeConstraint(
51 final RangeConstraint<C> baseRangeConstraint) {
53 return baseRangeConstraint;
56 // Run through alternatives and resolve them against the base type
57 final RangeSet<C> baseRangeSet = (RangeSet<C>) baseRangeConstraint.getAllowedRanges();
58 Verify.verify(!baseRangeSet.isEmpty(), "Base type %s does not define constraints", getBaseType());
60 final Range<? extends C> baseRange = baseRangeSet.span();
61 final List<ValueRange> resolvedRanges = ensureResolvedRanges(ranges, baseRange);
63 // Next up, ensure the of boundaries match base constraints
64 final RangeSet<C> typedRanges = ensureTypedRanges(resolvedRanges, baseRange.lowerEndpoint().getClass());
66 // Now verify if new ranges are strict subset of base ranges
67 if (!baseRangeSet.enclosesAll(typedRanges)) {
68 throw new InvalidRangeConstraintException(typedRanges,
69 "Range constraints %s is not a subset of parent constraints %s", typedRanges, baseRangeSet);
72 return new RangeConstraint<C>() {
74 public Optional<String> getErrorAppTag() {
75 return constraint.getErrorAppTag();
79 public Optional<String> getErrorMessage() {
80 return constraint.getErrorMessage();
84 public Optional<String> getDescription() {
85 return constraint.getDescription();
89 public Optional<String> getReference() {
90 return constraint.getReference();
94 public RangeSet<? extends C> getAllowedRanges() {
100 private static <C extends Number & Comparable<C>> List<ValueRange> ensureResolvedRanges(
101 final List<ValueRange> unresolved, final Range<? extends C> baseRange) {
102 // First check if we need to resolve anything at all
103 for (ValueRange c : unresolved) {
104 if (c.lowerBound() instanceof UnresolvedNumber || c.upperBound() instanceof UnresolvedNumber) {
105 return resolveRanges(unresolved, baseRange);
109 // No need, just return the same list
113 private static <T extends Number & Comparable<T>> List<ValueRange> resolveRanges(final List<ValueRange> unresolved,
114 final Range<? extends T> baseRange) {
115 final List<ValueRange> ret = new ArrayList<>(unresolved.size());
116 for (ValueRange range : unresolved) {
117 final Number min = range.lowerBound();
118 final Number max = range.upperBound();
120 if (max instanceof UnresolvedNumber || min instanceof UnresolvedNumber) {
121 final Number rMin = min instanceof UnresolvedNumber
122 ? ((UnresolvedNumber)min).resolveRange(baseRange) : min;
123 final Number rMax = max instanceof UnresolvedNumber
124 ? ((UnresolvedNumber)max).resolveRange(baseRange) : max;
125 ret.add(ValueRange.of((@NonNull Number)rMin, (@NonNull Number)rMax));
134 private static <T extends Number & Comparable<T>> RangeSet<T> ensureTypedRanges(final List<ValueRange> ranges,
135 final Class<? extends Number> clazz) {
136 final Builder<T> builder = ImmutableRangeSet.builder();
137 for (ValueRange range : ranges) {
138 if (!clazz.isInstance(range.lowerBound()) || !clazz.isInstance(range.upperBound())) {
139 return typedRanges(ranges, clazz);
142 builder.add(Range.closed((T) range.lowerBound(), (T)range.upperBound()));
145 return builder.build();
148 private static <T extends Number & Comparable<T>> RangeSet<T> typedRanges(final List<ValueRange> ranges,
149 final Class<? extends Number> clazz) {
150 final Function<Number, ? extends Number> function = NumberUtil.converterTo(clazz);
151 Preconditions.checkArgument(function != null, "Unsupported range class %s", clazz);
153 final Builder<T> builder = ImmutableRangeSet.builder();
155 for (ValueRange range : ranges) {
156 if (!clazz.isInstance(range.lowerBound()) || !clazz.isInstance(range.upperBound())) {
161 min = function.apply(range.lowerBound());
162 max = function.apply(range.upperBound());
163 } catch (NumberFormatException e) {
164 throw new IllegalArgumentException(String.format("Constraint %s does not fit into range of %s",
165 range, clazz.getSimpleName()), e);
168 builder.add(Range.closed((T)min, (T)max));
170 builder.add(Range.closed((T) range.lowerBound(), (T)range.upperBound()));
174 return builder.build();