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* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.search.aggregations.bucket.histogram;
import com.google.common.collect.ImmutableMap;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.collect.MapBuilder;
import org.elasticsearch.common.rounding.DateTimeUnit;
import org.elasticsearch.common.rounding.Rounding;
import org.elasticsearch.common.rounding.TimeZoneRounding;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.search.SearchParseException;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.support.ValueType;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.aggregations.support.ValuesSourceParser;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
/**
*
*/
public class DateHistogramParser implements Aggregator.Parser {
static final ParseField EXTENDED_BOUNDS = new ParseField("extended_bounds");
static final ParseField OFFSET = new ParseField("offset");
static final ParseField INTERVAL = new ParseField("interval");
public static final ImmutableMap<String, DateTimeUnit> DATE_FIELD_UNITS;
static {
DATE_FIELD_UNITS = MapBuilder.<String, DateTimeUnit>newMapBuilder()
.put("year", DateTimeUnit.YEAR_OF_CENTURY)
.put("1y", DateTimeUnit.YEAR_OF_CENTURY)
.put("quarter", DateTimeUnit.QUARTER)
.put("1q", DateTimeUnit.QUARTER)
.put("month", DateTimeUnit.MONTH_OF_YEAR)
.put("1M", DateTimeUnit.MONTH_OF_YEAR)
.put("week", DateTimeUnit.WEEK_OF_WEEKYEAR)
.put("1w", DateTimeUnit.WEEK_OF_WEEKYEAR)
.put("day", DateTimeUnit.DAY_OF_MONTH)
.put("1d", DateTimeUnit.DAY_OF_MONTH)
.put("hour", DateTimeUnit.HOUR_OF_DAY)
.put("1h", DateTimeUnit.HOUR_OF_DAY)
.put("minute", DateTimeUnit.MINUTES_OF_HOUR)
.put("1m", DateTimeUnit.MINUTES_OF_HOUR)
.put("second", DateTimeUnit.SECOND_OF_MINUTE)
.put("1s", DateTimeUnit.SECOND_OF_MINUTE)
.immutableMap();
}
@Override
public String type() {
return InternalDateHistogram.TYPE.name();
}
@Override
public AggregatorFactory parse(String aggregationName, XContentParser parser, SearchContext context) throws IOException {
ValuesSourceParser vsParser = ValuesSourceParser.numeric(aggregationName, InternalDateHistogram.TYPE, context)
.targetValueType(ValueType.DATE)
.formattable(true)
.timezoneAware(true)
.build();
boolean keyed = false;
long minDocCount = 0;
ExtendedBounds extendedBounds = null;
InternalOrder order = (InternalOrder) Histogram.Order.KEY_ASC;
String interval = null;
long offset = 0;
XContentParser.Token token;
String currentFieldName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (vsParser.token(currentFieldName, token, parser)) {
continue;
} else if (token == XContentParser.Token.VALUE_STRING) {
if (context.parseFieldMatcher().match(currentFieldName, OFFSET)) {
offset = parseOffset(parser.text());
} else if (context.parseFieldMatcher().match(currentFieldName, INTERVAL)) {
interval = parser.text();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
} else if (token == XContentParser.Token.VALUE_BOOLEAN) {
if ("keyed".equals(currentFieldName)) {
keyed = parser.booleanValue();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
} else if (token == XContentParser.Token.VALUE_NUMBER) {
if ("min_doc_count".equals(currentFieldName) || "minDocCount".equals(currentFieldName)) {
minDocCount = parser.longValue();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
} else if (token == XContentParser.Token.START_OBJECT) {
if ("order".equals(currentFieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.VALUE_STRING) {
String dir = parser.text();
boolean asc = "asc".equals(dir);
order = resolveOrder(currentFieldName, asc);
//TODO should we throw an error if the value is not "asc" or "desc"???
}
}
} else if (context.parseFieldMatcher().match(currentFieldName, EXTENDED_BOUNDS)) {
extendedBounds = new ExtendedBounds();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.VALUE_STRING) {
if ("min".equals(currentFieldName)) {
extendedBounds.minAsStr = parser.text();
} else if ("max".equals(currentFieldName)) {
extendedBounds.maxAsStr = parser.text();
} else {
throw new SearchParseException(context, "Unknown extended_bounds key for a " + token + " in aggregation ["
+ aggregationName + "]: [" + currentFieldName + "].", parser.getTokenLocation());
}
} else if (token == XContentParser.Token.VALUE_NUMBER) {
if ("min".equals(currentFieldName)) {
extendedBounds.min = parser.longValue();
} else if ("max".equals(currentFieldName)) {
extendedBounds.max = parser.longValue();
} else {
throw new SearchParseException(context, "Unknown extended_bounds key for a " + token + " in aggregation ["
+ aggregationName + "]: [" + currentFieldName + "].", parser.getTokenLocation());
}
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
}
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
} else {
throw new SearchParseException(context, "Unexpected token " + token + " in [" + aggregationName + "].",
parser.getTokenLocation());
}
}
if (interval == null) {
throw new SearchParseException(context,
"Missing required field [interval] for histogram aggregation [" + aggregationName + "]", parser.getTokenLocation());
}
TimeZoneRounding.Builder tzRoundingBuilder;
DateTimeUnit dateTimeUnit = DATE_FIELD_UNITS.get(interval);
if (dateTimeUnit != null) {
tzRoundingBuilder = TimeZoneRounding.builder(dateTimeUnit);
} else {
// the interval is a time value?
tzRoundingBuilder = TimeZoneRounding.builder(TimeValue.parseTimeValue(interval, null, getClass().getSimpleName() + ".interval"));
}
Rounding rounding = tzRoundingBuilder
.timeZone(vsParser.input().timezone())
.offset(offset).build();
ValuesSourceConfig config = vsParser.config();
return new HistogramAggregator.Factory(aggregationName, config, rounding, order, keyed, minDocCount, extendedBounds,
new InternalDateHistogram.Factory());
}
private static InternalOrder resolveOrder(String key, boolean asc) {
if ("_key".equals(key) || "_time".equals(key)) {
return (InternalOrder) (asc ? InternalOrder.KEY_ASC : InternalOrder.KEY_DESC);
}
if ("_count".equals(key)) {
return (InternalOrder) (asc ? InternalOrder.COUNT_ASC : InternalOrder.COUNT_DESC);
}
return new InternalOrder.Aggregation(key, asc);
}
private long parseOffset(String offset) throws IOException {
if (offset.charAt(0) == '-') {
return -TimeValue.parseTimeValue(offset.substring(1), null, getClass().getSimpleName() + ".parseOffset").millis();
}
int beginIndex = offset.charAt(0) == '+' ? 1 : 0;
return TimeValue.parseTimeValue(offset.substring(beginIndex), null, getClass().getSimpleName() + ".parseOffset").millis();
}
}