io.stargate.sgv2.graphql.schema.scalars.DateCoercing Maven / Gradle / Ivy
/*
* Copyright The Stargate 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.stargate.sgv2.graphql.schema.scalars;
import graphql.schema.CoercingParseLiteralException;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
class DateCoercing extends TemporalCoercing {
static DateCoercing INSTANCE = new DateCoercing();
private static final LocalDate EPOCH = LocalDate.of(1970, 1, 1);
private DateCoercing() {}
@Override
protected String format(LocalDate value) {
return DateTimeFormatter.ISO_LOCAL_DATE.format(value);
}
@Override
protected LocalDate parse(String value) {
try {
return LocalDate.parse(value, DateTimeFormatter.ISO_LOCAL_DATE);
} catch (RuntimeException e) {
throw new CoercingParseLiteralException(
"Couldn't parse literal, expected ISO-8601 extended local date format (YYYY-MM-DD)");
}
}
@Override
protected LocalDate parse(long value) {
int days = cqlDateToDaysSinceEpoch(value);
return EPOCH.plusDays(days);
}
private static int cqlDateToDaysSinceEpoch(long raw) {
if (raw < 0 || raw > MAX_CQL_LONG_VALUE)
throw new CoercingParseLiteralException(
String.format(
"Numeric Date literals must be between 0 and %d (got %d)", MAX_CQL_LONG_VALUE, raw));
return (int) (raw - EPOCH_AS_CQL_LONG);
}
private static final long MAX_CQL_LONG_VALUE = ((1L << 32) - 1);
private static final long EPOCH_AS_CQL_LONG = (1L << 31);
}
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