org.apache.cassandra.serializers.SimpleDateSerializer Maven / Gradle / Ivy
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* 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.cassandra.serializers;
import java.nio.ByteBuffer;
import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.LocalDate;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.apache.cassandra.utils.ByteBufferUtil;
// For byte-order comparability, we shift by Integer.MIN_VALUE and treat the data as an unsigned integer ranging from
// min date to max date w/epoch sitting in the center @ 2^31
public class SimpleDateSerializer implements TypeSerializer
{
private static final DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy-MM-dd").withZone(DateTimeZone.UTC);
private static final long minSupportedDateMillis = TimeUnit.DAYS.toMillis(Integer.MIN_VALUE);
private static final long maxSupportedDateMillis = TimeUnit.DAYS.toMillis(Integer.MAX_VALUE);
private static final long maxSupportedDays = (long)Math.pow(2,32) - 1;
private static final long byteOrderShift = (long)Math.pow(2,31) * 2;
private static final Pattern rawPattern = Pattern.compile("^-?\\d+$");
public static final SimpleDateSerializer instance = new SimpleDateSerializer();
public Integer deserialize(ByteBuffer bytes)
{
return bytes.remaining() == 0 ? null : ByteBufferUtil.toInt(bytes);
}
public ByteBuffer serialize(Integer value)
{
return value == null ? ByteBufferUtil.EMPTY_BYTE_BUFFER : ByteBufferUtil.bytes(value);
}
public static int dateStringToDays(String source) throws MarshalException
{
// Raw day value in unsigned int form, epoch @ 2^31
if (rawPattern.matcher(source).matches())
{
try
{
long result = Long.parseLong(source);
if (result < 0 || result > maxSupportedDays)
throw new NumberFormatException("Input out of bounds: " + source);
// Shift > epoch days into negative portion of Integer result for byte order comparability
if (result >= Integer.MAX_VALUE)
result -= byteOrderShift;
return (int) result;
}
catch (NumberFormatException e)
{
throw new MarshalException(String.format("Unable to make unsigned int (for date) from: '%s'", source), e);
}
}
// Attempt to parse as date string
try
{
DateTime parsed = formatter.parseDateTime(source);
long millis = parsed.getMillis();
if (millis < minSupportedDateMillis)
throw new MarshalException(String.format("Input date %s is less than min supported date %s", source, new LocalDate(minSupportedDateMillis).toString()));
if (millis > maxSupportedDateMillis)
throw new MarshalException(String.format("Input date %s is greater than max supported date %s", source, new LocalDate(maxSupportedDateMillis).toString()));
return timeInMillisToDay(millis);
}
catch (IllegalArgumentException e1)
{
throw new MarshalException(String.format("Unable to coerce '%s' to a formatted date (long)", source), e1);
}
}
public static int timeInMillisToDay(long millis)
{
Integer result = (int) TimeUnit.MILLISECONDS.toDays(millis);
result -= Integer.MIN_VALUE;
return result;
}
public static long dayToTimeInMillis(int days)
{
return TimeUnit.DAYS.toMillis(days - Integer.MIN_VALUE);
}
public void validate(ByteBuffer bytes) throws MarshalException
{
if (bytes.remaining() != 4)
throw new MarshalException(String.format("Expected 4 byte long for date (%d)", bytes.remaining()));
}
public String toString(Integer value)
{
if (value == null)
return "";
return formatter.print(new LocalDate(dayToTimeInMillis(value), DateTimeZone.UTC));
}
public Class getType()
{
return Integer.class;
}
}