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Statistical sampling library for use in virtdata libraries, based
on apache commons math 4
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.logging.log4j.core.config.plugins.convert;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Arrays;
import java.util.Date;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Utility methods for Date classes.
*/
public final class DateTypeConverter {
private static final Map, MethodHandle> CONSTRUCTORS = new ConcurrentHashMap<>();
static {
final MethodHandles.Lookup lookup = MethodHandles.publicLookup();
for (final Class dateClass : Arrays.asList(Date.class, java.sql.Date.class, Time.class,
Timestamp.class)) {
try {
CONSTRUCTORS.put(dateClass,
lookup.findConstructor(dateClass, MethodType.methodType(void.class, long.class)));
} catch (final NoSuchMethodException | IllegalAccessException ignored) {
// these classes all have this exact constructor
}
}
}
/**
* Create a Date-related object from a timestamp in millis.
*
* @param millis timestamp in millis
* @param type date type to use
* @param date class to use
* @return new instance of D or null if there was an error
*/
@SuppressWarnings("unchecked")
public static D fromMillis(final long millis, final Class type) {
try {
return (D) CONSTRUCTORS.get(type).invoke(millis);
} catch (final Throwable ignored) {
return null;
}
}
private DateTypeConverter() {
}
}