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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.filters;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.lucene.search.Queries;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.query.ParsedQuery;
import org.elasticsearch.search.SearchParseException;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
*
*/
public class FiltersParser implements Aggregator.Parser {
public static final ParseField FILTERS_FIELD = new ParseField("filters");
public static final ParseField OTHER_BUCKET_FIELD = new ParseField("other_bucket");
public static final ParseField OTHER_BUCKET_KEY_FIELD = new ParseField("other_bucket_key");
@Override
public String type() {
return InternalFilters.TYPE.name();
}
@Override
public AggregatorFactory parse(String aggregationName, XContentParser parser, SearchContext context) throws IOException {
List filters = new ArrayList<>();
XContentParser.Token token = null;
String currentFieldName = null;
Boolean keyed = null;
String otherBucketKey = null;
boolean otherBucket = false;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.VALUE_BOOLEAN) {
if (context.parseFieldMatcher().match(currentFieldName, OTHER_BUCKET_FIELD)) {
otherBucket = parser.booleanValue();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
} else if (token == XContentParser.Token.VALUE_STRING) {
if (context.parseFieldMatcher().match(currentFieldName, OTHER_BUCKET_KEY_FIELD)) {
otherBucketKey = parser.text();
otherBucket = true;
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
} else if (token == XContentParser.Token.START_OBJECT) {
if (context.parseFieldMatcher().match(currentFieldName, FILTERS_FIELD)) {
keyed = true;
String key = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
key = parser.currentName();
} else {
ParsedQuery filter = context.queryParserService().parseInnerFilter(parser);
filters.add(new FiltersAggregator.KeyedFilter(key, filter == null ? Queries.newMatchAllQuery() : filter.query()));
}
}
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
} else if (token == XContentParser.Token.START_ARRAY) {
if (context.parseFieldMatcher().match(currentFieldName, FILTERS_FIELD)) {
keyed = false;
int idx = 0;
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
ParsedQuery filter = context.queryParserService().parseInnerFilter(parser);
filters.add(new FiltersAggregator.KeyedFilter(String.valueOf(idx), filter == null ? Queries.newMatchAllQuery()
: filter.query()));
idx++;
}
} 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());
}
}
if (otherBucket && otherBucketKey == null) {
otherBucketKey = "_other_";
}
return new FiltersAggregator.Factory(aggregationName, filters, keyed, otherBucketKey);
}
}