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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.range;
import org.elasticsearch.common.CheckedFunction;
import org.elasticsearch.common.xcontent.ObjectParser;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentParserUtils;
import org.elasticsearch.search.aggregations.Aggregation;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.ParsedMultiBucketAggregation;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Supplier;
import static org.elasticsearch.common.xcontent.XContentParserUtils.ensureExpectedToken;
public class ParsedRange extends ParsedMultiBucketAggregation implements Range {
@Override
public String getType() {
return RangeAggregationBuilder.NAME;
}
@Override
public List getBuckets() {
return buckets;
}
protected static void declareParsedRangeFields(final ObjectParser objectParser,
final CheckedFunction bucketParser,
final CheckedFunction keyedBucketParser) {
declareMultiBucketAggregationFields(objectParser, bucketParser::apply, keyedBucketParser::apply);
}
private static final ObjectParser PARSER =
new ObjectParser<>(ParsedRange.class.getSimpleName(), true, ParsedRange::new);
static {
declareParsedRangeFields(PARSER,
parser -> ParsedBucket.fromXContent(parser, false),
parser -> ParsedBucket.fromXContent(parser, true));
}
public static ParsedRange fromXContent(XContentParser parser, String name) throws IOException {
ParsedRange aggregation = PARSER.parse(parser, null);
aggregation.setName(name);
return aggregation;
}
public static class ParsedBucket extends ParsedMultiBucketAggregation.ParsedBucket implements Range.Bucket {
protected String key;
protected double from = Double.NEGATIVE_INFINITY;
protected String fromAsString;
protected double to = Double.POSITIVE_INFINITY;
protected String toAsString;
@Override
public String getKey() {
return getKeyAsString();
}
@Override
public String getKeyAsString() {
String keyAsString = super.getKeyAsString();
if (keyAsString != null) {
return keyAsString;
}
return key;
}
@Override
public Object getFrom() {
return from;
}
@Override
public String getFromAsString() {
if (fromAsString != null) {
return fromAsString;
}
return doubleAsString(from);
}
@Override
public Object getTo() {
return to;
}
@Override
public String getToAsString() {
if (toAsString != null) {
return toAsString;
}
return doubleAsString(to);
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
if (isKeyed()) {
builder.startObject(key);
} else {
builder.startObject();
builder.field(CommonFields.KEY.getPreferredName(), key);
}
if (Double.isInfinite(from) == false) {
builder.field(CommonFields.FROM.getPreferredName(), from);
if (fromAsString != null) {
builder.field(CommonFields.FROM_AS_STRING.getPreferredName(), fromAsString);
}
}
if (Double.isInfinite(to) == false) {
builder.field(CommonFields.TO.getPreferredName(), to);
if (toAsString != null) {
builder.field(CommonFields.TO_AS_STRING.getPreferredName(), toAsString);
}
}
builder.field(CommonFields.DOC_COUNT.getPreferredName(), getDocCount());
getAggregations().toXContentInternal(builder, params);
builder.endObject();
return builder;
}
private static String doubleAsString(double d) {
return Double.isInfinite(d) ? null : Double.toString(d);
}
protected static B parseRangeBucketXContent(final XContentParser parser,
final Supplier bucketSupplier,
final boolean keyed) throws IOException {
final B bucket = bucketSupplier.get();
bucket.setKeyed(keyed);
XContentParser.Token token = parser.currentToken();
String currentFieldName = parser.currentName();
if (keyed) {
ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser::getTokenLocation);
bucket.key = currentFieldName;
ensureExpectedToken(XContentParser.Token.START_OBJECT, parser.nextToken(), parser::getTokenLocation);
}
List aggregations = new ArrayList<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token.isValue()) {
if (CommonFields.KEY_AS_STRING.getPreferredName().equals(currentFieldName)) {
bucket.setKeyAsString(parser.text());
} else if (CommonFields.KEY.getPreferredName().equals(currentFieldName)) {
bucket.key = parser.text();
} else if (CommonFields.DOC_COUNT.getPreferredName().equals(currentFieldName)) {
bucket.setDocCount(parser.longValue());
} else if (CommonFields.FROM.getPreferredName().equals(currentFieldName)) {
bucket.from = parser.doubleValue();
} else if (CommonFields.FROM_AS_STRING.getPreferredName().equals(currentFieldName)) {
bucket.fromAsString = parser.text();
} else if (CommonFields.TO.getPreferredName().equals(currentFieldName)) {
bucket.to = parser.doubleValue();
} else if (CommonFields.TO_AS_STRING.getPreferredName().equals(currentFieldName)) {
bucket.toAsString = parser.text();
}
} else if (token == XContentParser.Token.START_OBJECT) {
XContentParserUtils.parseTypedKeysObject(parser, Aggregation.TYPED_KEYS_DELIMITER, Aggregation.class,
aggregations::add);
}
}
bucket.setAggregations(new Aggregations(aggregations));
return bucket;
}
static ParsedBucket fromXContent(final XContentParser parser, final boolean keyed) throws IOException {
return parseRangeBucketXContent(parser, ParsedBucket::new, keyed);
}
}
}