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 javax.annotation.Nullable;
17 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
18 import org.slf4j.Logger;
19 import org.slf4j.LoggerFactory;
21 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<?>> b, final AbstractRangeGenerator<?> generator) {
26 b.put(generator.getTypeClass().getCanonicalName(), generator);
30 final Builder<String, AbstractRangeGenerator<?>> b = ImmutableMap.<String, AbstractRangeGenerator<?>> builder();
31 addGenerator(b, new ByteRangeGenerator());
32 addGenerator(b, new ShortRangeGenerator());
33 addGenerator(b, new IntegerRangeGenerator());
34 addGenerator(b, new LongRangeGenerator());
35 addGenerator(b, new BigDecimalRangeGenerator());
36 addGenerator(b, new BigIntegerRangeGenerator());
37 GENERATORS = b.build();
40 private final Class<T> type;
42 protected AbstractRangeGenerator(final Class<T> typeClass) {
43 this.type = Preconditions.checkNotNull(typeClass);
46 static AbstractRangeGenerator<?> getInstance(final String canonicalName) {
47 return GENERATORS.get(canonicalName);
51 * Return the type's class.
53 * @return A class object
55 protected final @Nonnull Class<T> getTypeClass() {
60 * Return the type's fully-qualified name.
62 * @return Fully-qualified name
64 protected final @Nonnull String getTypeName() {
65 return type.getName();
68 protected final @Nonnull T getValue(final Number value) {
69 if (type.isInstance(value)) {
70 return type.cast(value);
73 LOG.info("Number class conversion from {} to {} may lose precision of {}", value.getClass(), type, value);
74 return convert(value);
77 // FIXME: Once BUG-3399 is fixed, we should never need this
79 protected abstract T convert(final Number value);
82 * Format a value into a Java-compilable expression which results in the appropriate
84 * @param number Number value
85 * @return Java language string representation
87 protected abstract @Nonnull String format(final T number);
90 * Generate the checker method source code.
91 * @param checkerName Name of the checker method.
92 * @param restrictions Restrictions which need to be applied.
93 * @return Method source code.
95 protected abstract @Nonnull String generateRangeCheckerImplementation(@Nonnull final String checkerName, @Nonnull final Collection<RangeConstraint> restrictions);
97 private static String rangeCheckerName(final String member) {
98 final StringBuilder sb = new StringBuilder("check");
102 return sb.append("Range").toString();
105 String generateRangeChecker(@Nullable final String member, @Nonnull final Collection<RangeConstraint> restrictions) {
106 Preconditions.checkArgument(!restrictions.isEmpty(), "Restrictions may not be empty");
107 return generateRangeCheckerImplementation(rangeCheckerName(member), restrictions);
110 String generateRangeCheckerCall(@Nullable final String member, @Nonnull final String valueReference) {
111 return rangeCheckerName(member) + '(' + valueReference + ");\n";