| /* |
| * 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.db.marshal; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Date; |
| |
| import org.apache.cassandra.cql3.Constants; |
| import org.apache.cassandra.cql3.Term; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.cassandra.cql3.CQL3Type; |
| import org.apache.cassandra.serializers.TypeSerializer; |
| import org.apache.cassandra.serializers.MarshalException; |
| import org.apache.cassandra.serializers.TimestampSerializer; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| /** |
| * Type for date-time values. |
| * |
| * This is meant as a replacement for DateType, as DateType wrongly compare |
| * pre-unix-epoch dates, sorting them *after* post-unix-epoch ones (due to it's |
| * use of unsigned bytes comparison). |
| */ |
| public class TimestampType extends AbstractType<Date> |
| { |
| private static final Logger logger = LoggerFactory.getLogger(TimestampType.class); |
| |
| public static final TimestampType instance = new TimestampType(); |
| |
| private TimestampType() {super(ComparisonType.CUSTOM);} // singleton |
| |
| public boolean isEmptyValueMeaningless() |
| { |
| return true; |
| } |
| |
| public int compareCustom(ByteBuffer o1, ByteBuffer o2) |
| { |
| return LongType.compareLongs(o1, o2); |
| } |
| |
| public ByteBuffer fromString(String source) throws MarshalException |
| { |
| // Return an empty ByteBuffer for an empty string. |
| if (source.isEmpty()) |
| return ByteBufferUtil.EMPTY_BYTE_BUFFER; |
| |
| return ByteBufferUtil.bytes(TimestampSerializer.dateStringToTimestamp(source)); |
| } |
| |
| public ByteBuffer fromTimeInMillis(long millis) throws MarshalException |
| { |
| return ByteBufferUtil.bytes(millis); |
| } |
| |
| @Override |
| public Term fromJSONObject(Object parsed) throws MarshalException |
| { |
| if (parsed instanceof Long) |
| return new Constants.Value(ByteBufferUtil.bytes((Long) parsed)); |
| |
| try |
| { |
| return new Constants.Value(TimestampType.instance.fromString((String) parsed)); |
| } |
| catch (ClassCastException exc) |
| { |
| throw new MarshalException(String.format( |
| "Expected a long or a datestring representation of a timestamp value, but got a %s: %s", |
| parsed.getClass().getSimpleName(), parsed)); |
| } |
| } |
| |
| @Override |
| public String toJSONString(ByteBuffer buffer, int protocolVersion) |
| { |
| return '"' + TimestampSerializer.getJsonDateFormatter().format(TimestampSerializer.instance.deserialize(buffer)) + '"'; |
| } |
| |
| @Override |
| public boolean isCompatibleWith(AbstractType<?> previous) |
| { |
| if (super.isCompatibleWith(previous)) |
| return true; |
| |
| if (previous instanceof DateType) |
| { |
| logger.warn("Changing from DateType to TimestampType is allowed, but be wary that they sort differently for pre-unix-epoch timestamps " |
| + "(negative timestamp values) and thus this change will corrupt your data if you have such negative timestamp. So unless you " |
| + "know that you don't have *any* pre-unix-epoch timestamp you should change back to DateType"); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public boolean isValueCompatibleWithInternal(AbstractType<?> otherType) |
| { |
| return this == otherType || otherType == DateType.instance || otherType == LongType.instance; |
| } |
| |
| public CQL3Type asCQL3Type() |
| { |
| return CQL3Type.Native.TIMESTAMP; |
| } |
| |
| public TypeSerializer<Date> getSerializer() |
| { |
| return TimestampSerializer.instance; |
| } |
| |
| @Override |
| protected int valueLengthIfFixed() |
| { |
| return 8; |
| } |
| } |