io.druid.java.util.common.parsers.TimestampParser Maven / Gradle / Ivy
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* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets 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 io.druid.java.util.common.parsers;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import io.druid.java.util.common.IAE;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
public class TimestampParser
{
public static Function createTimestampParser(
final String format
)
{
if (format.equalsIgnoreCase("auto")) {
// Could be iso or millis
return new Function()
{
@Override
public DateTime apply(String input)
{
Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
for (int i = 0; i < input.length(); i++) {
if (input.charAt(i) < '0' || input.charAt(i) > '9') {
return new DateTime(ParserUtils.stripQuotes(input));
}
}
return new DateTime(Long.parseLong(input));
}
};
} else if (format.equalsIgnoreCase("iso")) {
return new Function()
{
@Override
public DateTime apply(String input)
{
Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
return new DateTime(ParserUtils.stripQuotes(input));
}
};
} else if (format.equalsIgnoreCase("posix")
|| format.equalsIgnoreCase("millis")
|| format.equalsIgnoreCase("nano")) {
final Function numericFun = createNumericTimestampParser(format);
return new Function()
{
@Override
public DateTime apply(String input)
{
Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
return numericFun.apply(Long.parseLong(ParserUtils.stripQuotes(input)));
}
};
} else if (format.equalsIgnoreCase("ruby")) {
// Numeric parser ignores millis for ruby.
final Function numericFun = createNumericTimestampParser(format);
return new Function()
{
@Override
public DateTime apply(String input)
{
Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
return numericFun.apply(Double.parseDouble(ParserUtils.stripQuotes(input)));
}
};
} else {
try {
final DateTimeFormatter formatter = DateTimeFormat.forPattern(format);
return new Function()
{
@Override
public DateTime apply(String input)
{
Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
return formatter.parseDateTime(ParserUtils.stripQuotes(input));
}
};
}
catch (Exception e) {
throw new IAE(e, "Unable to parse timestamps with format [%s]", format);
}
}
}
public static Function createNumericTimestampParser(
final String format
)
{
// Ignore millis for ruby
if (format.equalsIgnoreCase("posix") || format.equalsIgnoreCase("ruby")) {
return new Function()
{
@Override
public DateTime apply(Number input)
{
return new DateTime(input.longValue() * 1000);
}
};
} else if (format.equalsIgnoreCase("nano")) {
return new Function()
{
@Override
public DateTime apply(Number input)
{
return new DateTime(input.longValue() / 1000000L);
}
};
} else {
return new Function()
{
@Override
public DateTime apply(Number input)
{
return new DateTime(input.longValue());
}
};
}
}
public static Function createObjectTimestampParser(
final String format
)
{
final Function stringFun = createTimestampParser(format);
final Function numericFun = createNumericTimestampParser(format);
return new Function()
{
@Override
public DateTime apply(Object o)
{
Preconditions.checkArgument(o != null, "null timestamp");
if (o instanceof Number) {
return numericFun.apply((Number) o);
} else {
return stringFun.apply(o.toString());
}
}
};
}
}