/* * 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<Integer> { 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<Integer> getType() { return Integer.class; } }