2 * Copyright (c) 2015 Cisco Systems, Inc. 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.mdsal.binding.java.api.generator;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.collect.Range;
13 import java.util.ArrayList;
14 import java.util.Collection;
15 import java.util.List;
17 import java.util.function.Function;
18 import org.eclipse.jdt.annotation.NonNull;
19 import org.opendaylight.yangtools.yang.binding.CodeHelpers;
20 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
21 import org.slf4j.Logger;
22 import org.slf4j.LoggerFactory;
24 abstract class AbstractPrimitiveRangeGenerator<T extends Number & Comparable<T>> extends AbstractRangeGenerator<T> {
25 private static final Logger LOG = LoggerFactory.getLogger(AbstractPrimitiveRangeGenerator.class);
26 private final @NonNull String primitiveName;
27 private final @NonNull T minValue;
28 private final @NonNull T maxValue;
30 AbstractPrimitiveRangeGenerator(final Class<T> typeClass, final String primitiveName, final T minValue,
33 this.primitiveName = requireNonNull(primitiveName);
34 this.minValue = requireNonNull(minValue);
35 this.maxValue = requireNonNull(maxValue);
39 * Return the name of the primitive type, as known by the Java language.
41 * @return Primitive type name
43 protected final @NonNull String getPrimitiveName() {
47 private boolean needsMaximumEnforcement(final T maxToEnforce) {
48 return maxValue.compareTo(maxToEnforce) > 0;
51 private boolean needsMinimumEnforcement(final T minToEnforce) {
52 return minValue.compareTo(minToEnforce) < 0;
55 private Collection<String> createExpressions(final RangeConstraint<?> constraint,
56 final Function<Class<?>, String> classImporter) {
57 final Set<? extends Range<? extends Number>> constraints = constraint.getAllowedRanges().asRanges();
58 final Collection<String> ret = new ArrayList<>(constraints.size());
60 for (Range<? extends Number> r : constraints) {
61 final T min = getValue(r.lowerEndpoint());
62 final boolean needMin = needsMinimumEnforcement(min);
64 final T max = getValue(r.upperEndpoint());
65 final boolean needMax = needsMaximumEnforcement(max);
67 if (!needMin && !needMax) {
68 LOG.debug("Type {} indicates [{}, {}] does not require enforcement", getTypeName(), min, max);
72 final StringBuilder sb = new StringBuilder();
74 appendMinCheck(sb, min, classImporter);
80 appendMaxCheck(sb, max, classImporter);
83 ret.add(sb.toString());
89 void appendMaxCheck(final StringBuilder sb, final T max, final Function<Class<?>, String> classImporter) {
90 sb.append("value <= ").append(format(max));
93 void appendMinCheck(final StringBuilder sb, final T min, final Function<Class<?>, String> classImporter) {
94 sb.append("value >= ").append(format(min));
98 * Format a value into a Java-compilable expression which results in the appropriate
101 * @param value Number value
102 * @return Java language string representation
104 protected abstract @NonNull String format(T value);
106 String codeHelpersThrow() {
107 return "throwInvalidRange";
110 private String createRangeString(final RangeConstraint<?> constraint) {
111 final Set<? extends Range<? extends Number>> constraints = constraint.getAllowedRanges().asRanges();
112 final List<Range<T>> ranges = new ArrayList<>(constraints.size());
114 for (Range<? extends Number> c : constraints) {
115 ranges.add(Range.closed(getValue(c.lowerEndpoint()), getValue(c.upperEndpoint())));
118 return ranges.toString();
122 protected final String generateRangeCheckerImplementation(final String checkerName,
123 final RangeConstraint<?> constraints, final Function<Class<?>, String> classImporter) {
124 final StringBuilder sb = new StringBuilder();
125 final Collection<String> expressions = createExpressions(constraints, classImporter);
127 sb.append("private static void ").append(checkerName).append("(final ").append(primitiveName)
128 .append(" value) {\n");
130 if (!expressions.isEmpty()) {
131 for (String exp : expressions) {
132 sb.append(" if (").append(exp).append(") {\n");
133 sb.append(" return;\n");
137 sb.append(" ").append(classImporter.apply(CodeHelpers.class)).append('.').append(codeHelpersThrow())
138 .append("(\"").append(createRangeString(constraints)).append("\", value);\n");
141 return sb.append("}\n").toString();