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io.micronaut.runtime.converters.time.TimeConverterRegistrar Maven / Gradle / Ivy
/*
* Copyright 2017-2020 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.runtime.converters.time;
import io.micronaut.context.annotation.BootstrapContextCompatible;
import io.micronaut.context.annotation.Requires;
import io.micronaut.context.env.Environment;
import io.micronaut.core.annotation.TypeHint;
import io.micronaut.core.convert.ConversionContext;
import io.micronaut.core.convert.ConversionService;
import io.micronaut.core.convert.TypeConverter;
import io.micronaut.core.convert.TypeConverterRegistrar;
import io.micronaut.core.convert.format.Format;
import io.micronaut.core.util.StringUtils;
import javax.inject.Singleton;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.time.temporal.TemporalAccessor;
import java.util.Optional;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Registers data time converters.
*
* @author Graeme Rocher
* @since 1.0
*/
@Singleton
// Android doesn't support java.time
@Requires(notEnv = Environment.ANDROID)
@BootstrapContextCompatible
@TypeHint(
value = {
Duration.class,
Instant.class,
LocalDate.class,
LocalDateTime.class,
MonthDay.class,
OffsetDateTime.class,
OffsetTime.class,
Period.class,
Year.class,
YearMonth.class,
ZonedDateTime.class,
ZoneId.class,
ZoneOffset.class
},
accessType = TypeHint.AccessType.ALL_PUBLIC
)
public class TimeConverterRegistrar implements TypeConverterRegistrar {
private static final Pattern DURATION_MATCHER = Pattern.compile("^(-?\\d+)([unsmhd])(s?)$");
private static final int MILLIS = 3;
@Override
public void register(ConversionService conversionService) {
// CharSequence -> Duration
conversionService.addConverter(
CharSequence.class,
Duration.class,
(object, targetType, context) -> {
String value = object.toString().trim();
if (value.startsWith("P")) {
try {
return Optional.of(Duration.parse(value));
} catch (DateTimeParseException e) {
context.reject(value, e);
return Optional.empty();
}
} else {
Matcher matcher = DURATION_MATCHER.matcher(value);
if (matcher.find()) {
String amount = matcher.group(1);
final String g2 = matcher.group(2);
char type = g2.charAt(0);
try {
switch (type) {
case 's':
return Optional.of(Duration.ofSeconds(Integer.valueOf(amount)));
case 'm':
String ms = matcher.group(MILLIS);
if (StringUtils.hasText(ms)) {
return Optional.of(Duration.ofMillis(Integer.valueOf(amount)));
} else {
return Optional.of(Duration.ofMinutes(Integer.valueOf(amount)));
}
case 'h':
return Optional.of(Duration.ofHours(Integer.valueOf(amount)));
case 'd':
return Optional.of(Duration.ofDays(Integer.valueOf(amount)));
default:
final String seq = g2 + matcher.group(3);
switch (seq) {
case "ns":
return Optional.of(Duration.ofNanos(Integer.valueOf(amount)));
default:
context.reject(
value,
new DateTimeParseException("Unparseable date format (" + value + "). Should either be a ISO-8601 duration or a round number followed by the unit type", value, 0));
return Optional.empty();
}
}
} catch (NumberFormatException e) {
context.reject(value, e);
}
}
}
return Optional.empty();
}
);
// CharSequence -> LocalDateTime
conversionService.addConverter(
CharSequence.class,
LocalDateTime.class,
(object, targetType, context) -> {
try {
DateTimeFormatter formatter = resolveFormatter(context);
LocalDateTime result = LocalDateTime.parse(object, formatter);
return Optional.of(result);
} catch (DateTimeParseException e) {
context.reject(object, e);
return Optional.empty();
}
}
);
// TemporalAccessor - CharSequence
final TypeConverter temporalConverter = (object, targetType, context) -> {
try {
DateTimeFormatter formatter = resolveFormatter(context);
return Optional.of(formatter.format(object));
} catch (DateTimeParseException e) {
context.reject(object, e);
return Optional.empty();
}
};
conversionService.addConverter(
TemporalAccessor.class,
CharSequence.class,
temporalConverter
);
// CharSequence -> LocalDate
conversionService.addConverter(
CharSequence.class,
LocalDate.class,
(object, targetType, context) -> {
try {
DateTimeFormatter formatter = resolveFormatter(context);
LocalDate result = LocalDate.parse(object, formatter);
return Optional.of(result);
} catch (DateTimeParseException e) {
context.reject(object, e);
return Optional.empty();
}
}
);
// CharSequence -> ZonedDateTime
conversionService.addConverter(
CharSequence.class,
ZonedDateTime.class,
(object, targetType, context) -> {
try {
DateTimeFormatter formatter = resolveFormatter(context);
ZonedDateTime result = ZonedDateTime.parse(object, formatter);
return Optional.of(result);
} catch (DateTimeParseException e) {
context.reject(object, e);
return Optional.empty();
}
}
);
// CharSequence -> OffsetDateTime
conversionService.addConverter(
CharSequence.class,
OffsetDateTime.class,
(object, targetType, context) -> {
try {
DateTimeFormatter formatter = resolveFormatter(context);
OffsetDateTime result = OffsetDateTime.parse(object, formatter);
return Optional.of(result);
} catch (DateTimeParseException e) {
context.reject(object, e);
return Optional.empty();
}
}
);
}
private DateTimeFormatter resolveFormatter(ConversionContext context) {
Optional format = context.getAnnotationMetadata().stringValue(Format.class);
return format
.map((pattern) -> DateTimeFormatter.ofPattern(pattern, context.getLocale()))
.orElse(DateTimeFormatter.RFC_1123_DATE_TIME);
}
}
