2 * Copyright (c) 2017 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.javav2.java.api.generator.range_generators;
10 import com.google.common.base.Preconditions;
11 import com.google.common.collect.ImmutableMap;
12 import com.google.common.collect.ImmutableMap.Builder;
14 import javax.annotation.Nonnull;
15 import org.opendaylight.mdsal.binding.javav2.model.api.ConcreteType;
16 import org.opendaylight.mdsal.binding.javav2.model.api.Type;
17 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
18 import org.slf4j.Logger;
19 import org.slf4j.LoggerFactory;
21 public abstract class AbstractRangeGenerator<T extends Number & Comparable<T>> {
22 private static final Logger LOG = LoggerFactory.getLogger(AbstractRangeGenerator.class);
23 private static final Map<String, AbstractRangeGenerator<?>> GENERATORS;
25 private static void addGenerator(final Builder<String, AbstractRangeGenerator<?>> builder,
26 final AbstractRangeGenerator<?> generator) {
27 builder.put(generator.getTypeClass().getCanonicalName(), generator);
31 final Builder<String, AbstractRangeGenerator<?>> b = ImmutableMap.builder();
32 addGenerator(b, new ByteRangeGenerator());
33 addGenerator(b, new ShortRangeGenerator());
34 addGenerator(b, new IntegerRangeGenerator());
35 addGenerator(b, new LongRangeGenerator());
36 addGenerator(b, new Uint8RangeGenerator());
37 addGenerator(b, new Uint16RangeGenerator());
38 addGenerator(b, new Uint32RangeGenerator());
39 addGenerator(b, new Uint64RangeGenerator());
40 addGenerator(b, new BigDecimalRangeGenerator());
41 addGenerator(b, new BigIntegerRangeGenerator());
42 GENERATORS = b.build();
45 private final Class<T> type;
47 protected AbstractRangeGenerator(final Class<T> typeClass) {
48 this.type = Preconditions.checkNotNull(typeClass);
51 public static AbstractRangeGenerator<?> forType(@Nonnull final Type type) {
52 final ConcreteType javaType = TypeUtils.getBaseYangType(type);
53 return GENERATORS.get(javaType.getFullyQualifiedName());
57 * Return the type's class.
59 * @return A class object
61 @Nonnull protected final Class<T> getTypeClass() {
66 * Return the type's fully-qualified name.
68 * @return Fully-qualified name
70 @Nonnull protected final String getTypeName() {
71 return type.getName();
75 * Return the value in the native type from a particular Number instance.
77 * @param value Value as a Number
78 * @return Value in native format.
80 @Nonnull protected final T getValue(final Number value) {
81 if (type.isInstance(value)) {
82 return type.cast(value);
85 LOG.debug("Converting value {} from {} to {}", value, value.getClass(), type);
86 final T ret = convert(value);
88 // Check if the conversion lost any precision by performing conversion the other way around
89 final AbstractRangeGenerator<?> gen = GENERATORS.get(value.getClass().getName());
90 final Number check = gen.convert(ret);
91 if (!value.equals(check)) {
92 LOG.warn("Number class conversion from {} to {} truncated value {} to {}", value.getClass(),
99 // FIXME: Once BUG-3399 is fixed, we should never need this
100 protected abstract T convert(Number value);
103 * Format a value into a Java-compilable expression which results in the appropriate
106 * @param value Number value
107 * @return Java language string representation
109 @Nonnull protected abstract String format(T value);
112 * Generate the checker method source code.
113 * @param checkerName Name of the checker method.
114 * @param constraint Restrictions which need to be applied.
115 * @return Method source code.
117 @Nonnull protected abstract String generateRangeCheckerImplementation(@Nonnull String checkerName,
118 @Nonnull RangeConstraint<?> constraint);
120 private static String rangeCheckerName(final String member) {
121 return "check" + member + "Range";
124 public String generateRangeChecker(@Nonnull final String member, @Nonnull final RangeConstraint<?> constraint) {
125 return generateRangeCheckerImplementation(rangeCheckerName(member), constraint);
128 public String generateRangeCheckerCall(@Nonnull final String member, @Nonnull final String valueReference) {
129 return rangeCheckerName(member) + '(' + valueReference + ");\n";