org.elasticsearch.search.aggregations.support.format.ValueParser Maven / Gradle / Ivy
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* the Apache License, Version 2.0 (the "License"); you may
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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package org.elasticsearch.search.aggregations.support.format;
import org.elasticsearch.common.joda.DateMathParser;
import org.elasticsearch.common.joda.FormatDateTimeFormatter;
import org.elasticsearch.common.joda.Joda;
import org.elasticsearch.index.mapper.core.DateFieldMapper;
import org.elasticsearch.index.mapper.ip.IpFieldMapper;
import org.elasticsearch.search.aggregations.AggregationExecutionException;
import org.elasticsearch.search.internal.SearchContext;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;
import java.util.concurrent.Callable;
import java.util.concurrent.TimeUnit;
/**
*
*/
public interface ValueParser {
static final ValueParser IPv4 = new IPv4();
static final ValueParser RAW = new Raw();
long parseLong(String value, SearchContext searchContext);
double parseDouble(String value, SearchContext searchContext);
/**
* Knows how to parse datatime values based on date/time format
*/
static class DateTime implements ValueParser {
public static final DateTime DEFAULT = new DateTime(DateFieldMapper.Defaults.DATE_TIME_FORMATTER);
private FormatDateTimeFormatter formatter;
public DateTime(String format) {
this(Joda.forPattern(format));
}
public DateTime(FormatDateTimeFormatter formatter) {
this.formatter = formatter;
}
@Override
public long parseLong(String value, SearchContext searchContext) {
return formatter.parser().parseMillis(value);
}
@Override
public double parseDouble(String value, SearchContext searchContext) {
return parseLong(value, searchContext);
}
}
/**
* Knows how to parse datatime values based on elasticsearch's date math expression
*/
static class DateMath implements ValueParser {
public static final DateMath DEFAULT = new ValueParser.DateMath(new DateMathParser(DateFieldMapper.Defaults.DATE_TIME_FORMATTER, DateFieldMapper.Defaults.TIME_UNIT));
private DateMathParser parser;
public DateMath(String format, TimeUnit timeUnit) {
this(new DateMathParser(Joda.forPattern(format), timeUnit));
}
public DateMath(DateMathParser parser) {
this.parser = parser;
}
@Override
public long parseLong(String value, final SearchContext searchContext) {
final Callable now = new Callable() {
@Override
public Long call() throws Exception {
return searchContext.nowInMillis();
}
};
return parser.parse(value, now);
}
@Override
public double parseDouble(String value, SearchContext searchContext) {
return parseLong(value, searchContext);
}
public static DateMath mapper(DateFieldMapper mapper) {
return new DateMath(new DateMathParser(mapper.dateTimeFormatter(), DateFieldMapper.Defaults.TIME_UNIT));
}
}
/**
* Knows how to parse IPv4 formats
*/
static class IPv4 implements ValueParser {
private IPv4() {
}
@Override
public long parseLong(String value, SearchContext searchContext) {
return IpFieldMapper.ipToLong(value);
}
@Override
public double parseDouble(String value, SearchContext searchContext) {
return parseLong(value, searchContext);
}
}
static class Raw implements ValueParser {
private Raw() {
}
@Override
public long parseLong(String value, SearchContext searchContext) {
return Long.parseLong(value);
}
@Override
public double parseDouble(String value, SearchContext searchContext) {
return Double.parseDouble(value);
}
}
public static abstract class Number implements ValueParser {
NumberFormat format;
Number(NumberFormat format) {
this.format = format;
}
public static class Pattern extends Number {
private static final DecimalFormatSymbols SYMBOLS = new DecimalFormatSymbols(Locale.ROOT);
public Pattern(String pattern) {
super(new DecimalFormat(pattern, SYMBOLS));
}
@Override
public long parseLong(String value, SearchContext searchContext) {
try {
return format.parse(value).longValue();
} catch (ParseException nfe) {
throw new AggregationExecutionException("Invalid number format [" + ((DecimalFormat) format).toPattern() + "]");
}
}
@Override
public double parseDouble(String value, SearchContext searchContext) {
try {
return format.parse(value).doubleValue();
} catch (ParseException nfe) {
throw new AggregationExecutionException("Invalid number format [" + ((DecimalFormat) format).toPattern() + "]");
}
}
}
}
}