com.github.cassandra.jdbc.provider.datastax.codecs.JavaSqlDateCodec Maven / Gradle / Ivy
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Type 4 JDBC driver for Apache Cassandra built on top of existing great libs like java driver from
DataStax. It supports Cassandra 2.x and above with improved SQL compatibility.
/**
* Copyright (C) 2015-2017, Zhichun Wu
*
* 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 com.github.cassandra.jdbc.provider.datastax.codecs;
import com.datastax.driver.core.DataType;
import com.datastax.driver.core.ProtocolVersion;
import com.datastax.driver.core.TypeCodec;
import com.datastax.driver.core.exceptions.InvalidTypeException;
import org.joda.time.Days;
import org.joda.time.LocalDate;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import java.nio.ByteBuffer;
import java.sql.Date;
import static com.datastax.driver.core.CodecUtils.*;
import static com.datastax.driver.core.ParseUtils.*;
import static javax.xml.bind.DatatypeConverter.parseLong;
import static org.joda.time.Days.daysBetween;
public class JavaSqlDateCodec extends TypeCodec {
public static final JavaSqlDateCodec instance = new JavaSqlDateCodec();
private static final LocalDate EPOCH = new LocalDate(1970, 1, 1);
private static final DateTimeFormatter FORMATTER = DateTimeFormat.forPattern("yyyy-MM-dd").withZoneUTC();
private JavaSqlDateCodec() {
super(DataType.date(), Date.class);
}
@Override
public ByteBuffer serialize(Date value, ProtocolVersion protocolVersion) {
if (value == null)
return null;
Days days = daysBetween(EPOCH, LocalDate.fromDateFields(value));
int unsigned = fromSignedToUnsignedInt(days.getDays());
return cint().serializeNoBoxing(unsigned, protocolVersion);
}
@Override
public Date deserialize(ByteBuffer bytes, ProtocolVersion protocolVersion) {
if (bytes == null || bytes.remaining() == 0)
return null;
int unsigned = cint().deserializeNoBoxing(bytes, protocolVersion);
int signed = fromUnsignedToSignedInt(unsigned);
return new Date(EPOCH.plusDays(signed).toDate().getTime());
}
@Override
public String format(Date value) {
if (value == null)
return "NULL";
return quote(FORMATTER.print(LocalDate.fromDateFields(value)));
}
@Override
public Date parse(String value) {
if (value == null || value.isEmpty() || value.equalsIgnoreCase("NULL"))
return null;
// single quotes are optional for long literals, mandatory for date patterns
// strip enclosing single quotes, if any
if (isQuoted(value)) {
value = unquote(value);
}
if (isLongLiteral(value)) {
long raw;
try {
raw = parseLong(value);
} catch (NumberFormatException e) {
throw new InvalidTypeException(String.format("Cannot parse date value from \"%s\"", value));
}
int days;
try {
days = fromCqlDateToDaysSinceEpoch(raw);
} catch (IllegalArgumentException e) {
throw new InvalidTypeException(String.format("Cannot parse date value from \"%s\"", value));
}
return new Date(EPOCH.plusDays(days).toDate().getTime());
}
try {
return new Date(LocalDate.parse(value, FORMATTER).toDate().getTime());
} catch (RuntimeException e) {
throw new InvalidTypeException(String.format("Cannot parse date value from \"%s\"", value));
}
}
}