/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.index.query;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.OpenFilterClause;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.search.XBooleanFilter;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.cache.filter.support.CacheKeyFilter;
import java.io.IOException;
import java.util.List;
import static org.elasticsearch.common.collect.Lists.*;
/**
* @author kimchy (shay.banon)
*/
public class BoolFilterParser implements FilterParser {
public static final String NAME = "bool";
@Inject public BoolFilterParser() {
}
@Override public String[] names() {
return new String[]{NAME};
}
@Override public Filter parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
List<OpenFilterClause> clauses = newArrayList();
boolean cache = false;
CacheKeyFilter.Key cacheKey = null;
String filterName = null;
String currentFieldName = null;
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
if ("must".equals(currentFieldName)) {
clauses.add(new OpenFilterClause(parseContext.parseInnerFilter(), BooleanClause.Occur.MUST));
} else if ("must_not".equals(currentFieldName) || "mustNot".equals(currentFieldName)) {
clauses.add(new OpenFilterClause(parseContext.parseInnerFilter(), BooleanClause.Occur.MUST_NOT));
} else if ("should".equals(currentFieldName)) {
clauses.add(new OpenFilterClause(parseContext.parseInnerFilter(), BooleanClause.Occur.SHOULD));
}
} else if (token == XContentParser.Token.START_ARRAY) {
if ("must".equals(currentFieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
clauses.add(new OpenFilterClause(parseContext.parseInnerFilter(), BooleanClause.Occur.MUST));
}
} else if ("must_not".equals(currentFieldName) || "mustNot".equals(currentFieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
clauses.add(new OpenFilterClause(parseContext.parseInnerFilter(), BooleanClause.Occur.MUST_NOT));
}
} else if ("should".equals(currentFieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
clauses.add(new OpenFilterClause(parseContext.parseInnerFilter(), BooleanClause.Occur.SHOULD));
}
}
} else if (token.isValue()) {
if ("_cache".equals(currentFieldName)) {
cache = parser.booleanValue();
} else if ("_name".equals(currentFieldName)) {
filterName = parser.text();
} else if ("_cache_key".equals(currentFieldName) || "_cacheKey".equals(currentFieldName)) {
cacheKey = new CacheKeyFilter.Key(parser.text());
}
}
}
XBooleanFilter boolFilter = new XBooleanFilter();
for (OpenFilterClause filterClause : clauses) {
boolFilter.add(filterClause);
}
Filter filter = boolFilter;
if (cache) {
filter = parseContext.cacheFilter(filter, cacheKey);
}
if (filterName != null) {
parseContext.addNamedFilter(filterName, filter);
}
return filter;
}
}