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.yangtools.sal.java.api.generator;
10 import com.google.common.base.Preconditions;
11 import com.google.common.collect.ImmutableMap;
12 import com.google.common.collect.ImmutableMap.Builder;
13 import java.util.Collection;
15 import javax.annotation.Nonnull;
16 import org.opendaylight.yangtools.sal.binding.model.api.ConcreteType;
17 import org.opendaylight.yangtools.sal.binding.model.api.GeneratedProperty;
18 import org.opendaylight.yangtools.sal.binding.model.api.GeneratedTransferObject;
19 import org.opendaylight.yangtools.sal.binding.model.api.Type;
20 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
21 import org.slf4j.Logger;
22 import org.slf4j.LoggerFactory;
24 abstract class AbstractRangeGenerator<T extends Number & Comparable<T>> {
25 private static final Logger LOG = LoggerFactory.getLogger(AbstractRangeGenerator.class);
26 private static final Map<String, AbstractRangeGenerator<?>> GENERATORS;
28 private static void addGenerator(final Builder<String, AbstractRangeGenerator<?>> b, final AbstractRangeGenerator<?> generator) {
29 b.put(generator.getTypeClass().getCanonicalName(), generator);
33 final Builder<String, AbstractRangeGenerator<?>> b = ImmutableMap.<String, AbstractRangeGenerator<?>> builder();
34 addGenerator(b, new ByteRangeGenerator());
35 addGenerator(b, new ShortRangeGenerator());
36 addGenerator(b, new IntegerRangeGenerator());
37 addGenerator(b, new LongRangeGenerator());
38 addGenerator(b, new BigDecimalRangeGenerator());
39 addGenerator(b, new BigIntegerRangeGenerator());
40 GENERATORS = b.build();
43 private final Class<T> type;
45 protected AbstractRangeGenerator(final Class<T> typeClass) {
46 this.type = Preconditions.checkNotNull(typeClass);
49 // We need to walk up the GTO tree to get the root and then return its 'value' property
50 private static Type javaTypeForGTO(final GeneratedTransferObject gto) {
51 GeneratedTransferObject rootGto = gto;
52 while (rootGto.getSuperType() != null) {
53 rootGto = rootGto.getSuperType();
56 LOG.debug("Root GTO of {} is {}", rootGto, gto);
57 for (GeneratedProperty s : rootGto.getProperties()) {
58 if ("value".equals(s.getName())) {
59 return s.getReturnType();
63 throw new IllegalArgumentException(String.format("Failed to resolve GTO {} root {} to a Java type, properties are {}", gto, rootGto));
66 static AbstractRangeGenerator<?> forType(@Nonnull final Type type) {
68 if (type instanceof GeneratedTransferObject) {
69 javaType = javaTypeForGTO((GeneratedTransferObject) type);
70 LOG.debug("Resolved GTO {} to concrete type {}", type, javaType);
75 Preconditions.checkArgument(javaType instanceof ConcreteType, "Unsupported type %s", type);
76 return GENERATORS.get(javaType.getFullyQualifiedName());
80 * Return the type's class.
82 * @return A class object
84 protected final @Nonnull Class<T> getTypeClass() {
89 * Return the type's fully-qualified name.
91 * @return Fully-qualified name
93 protected final @Nonnull String getTypeName() {
94 return type.getName();
98 * Return the value in the native type from a particular Number instance.
100 * @param value Value as a Number
101 * @return Value in native format.
103 protected final @Nonnull T getValue(final Number value) {
104 if (type.isInstance(value)) {
105 return type.cast(value);
108 LOG.debug("Converting value {} from {} to {}", value, value.getClass(), type);
109 final T ret = convert(value);
111 // Check if the conversion lost any precision by performing conversion the other way around
112 final AbstractRangeGenerator<?> gen = GENERATORS.get(value.getClass().getName());
113 final Number check = gen.convert(ret);
114 if (!value.equals(check)) {
115 LOG.warn("Number class conversion from {} to {} truncated value {} to {}", value.getClass(), type, value, ret);
121 // FIXME: Once BUG-3399 is fixed, we should never need this
123 protected abstract T convert(final Number value);
126 * Format a value into a Java-compilable expression which results in the appropriate
128 * @param value Number value
129 * @return Java language string representation
131 protected abstract @Nonnull String format(final T value);
134 * Generate the checker method source code.
135 * @param checkerName Name of the checker method.
136 * @param constraints Restrictions which need to be applied.
137 * @return Method source code.
139 protected abstract @Nonnull String generateRangeCheckerImplementation(@Nonnull final String checkerName, @Nonnull final Collection<RangeConstraint> constraints);
141 private static String rangeCheckerName(final String member) {
142 return "check" + member + "Range";
145 String generateRangeChecker(@Nonnull final String member, @Nonnull final Collection<RangeConstraint> constraints) {
146 Preconditions.checkArgument(!constraints.isEmpty(), "Restrictions may not be empty");
147 return generateRangeCheckerImplementation(rangeCheckerName(member), constraints);
150 String generateRangeCheckerCall(@Nonnull final String member, @Nonnull final String valueReference) {
151 return rangeCheckerName(member) + '(' + valueReference + ");\n";