org.elasticsearch.hadoop.serialization.field.DateIndexFormatter Maven / Gradle / Ivy
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* 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
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* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.hadoop.serialization.field;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import org.elasticsearch.hadoop.util.Constants;
import org.elasticsearch.hadoop.util.DateUtils;
import org.elasticsearch.hadoop.util.StringUtils;
public class DateIndexFormatter implements IndexFormatter {
private String format;
private SimpleDateFormat dateFormat;
@Override
public void configure(String format) {
this.format = format;
format = fixDateForJdk(format);
this.dateFormat = new SimpleDateFormat(format);
}
/**
* Work-around for year formatting in JDK 6 vs 7+.
* JDK6: does not know about 'YYYY' (only 'yyyy'). Considers 'y' and 'yyy' as 'yy'.
* JDK7: understands both 'YYYY' and 'yyyy'. Considers 'y' and 'yyy' as 'yyyy'
*
* This method checks the pattern and converts it into JDK7 when running on JDK6.
*/
private String fixDateForJdk(String format) {
if (Constants.JRE_IS_MINIMUM_JAVA7) {
return format;
}
// JDK 6 - fix year formatting
// a. lower case Y to y
if (format.contains("Y")) {
format = format.replace("Y", "y");
}
// gotta love regex
// use lookahead to match isolated y/yyy with yyyy
format = format.replaceAll("((?