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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.index.query;
import org.apache.lucene.index.IndexReader;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.ParseFieldMatcher;
import org.elasticsearch.common.ParseFieldMatcherSupplier;
import org.elasticsearch.index.IndexSettings;
import org.elasticsearch.index.mapper.MapperService;
import org.elasticsearch.indices.query.IndicesQueriesRegistry;
import org.elasticsearch.script.ScriptService;
/**
* Context object used to rewrite {@link QueryBuilder} instances into simplified version.
*/
public class QueryRewriteContext implements ParseFieldMatcherSupplier {
protected final MapperService mapperService;
protected final ScriptService scriptService;
protected final IndexSettings indexSettings;
protected final IndicesQueriesRegistry indicesQueriesRegistry;
protected final QueryParseContext parseContext;
protected final IndexReader reader;
public QueryRewriteContext(IndexSettings indexSettings, MapperService mapperService, ScriptService scriptService,
IndicesQueriesRegistry indicesQueriesRegistry, IndexReader reader) {
this.mapperService = mapperService;
this.scriptService = scriptService;
this.indexSettings = indexSettings;
this.indicesQueriesRegistry = indicesQueriesRegistry;
this.parseContext = new QueryParseContext(indicesQueriesRegistry);
this.reader = reader;
}
/**
* Returns a clients to fetch resources from local or remove nodes.
*/
public final Client getClient() {
return scriptService.getClient();
}
/**
* Returns the index settings for this context. This might return null if the
* context has not index scope.
*/
public final IndexSettings getIndexSettings() {
return indexSettings;
}
/**
* Returns a script service to fetch scripts.
*/
public final ScriptService getScriptService() {
return scriptService;
}
/**
* Return the MapperService.
*/
public final MapperService getMapperService() {
return mapperService;
}
/** Return the current {@link IndexReader}, or {@code null} if we are on the coordinating node. */
public IndexReader getIndexReader() {
return reader;
}
public void parseFieldMatcher(ParseFieldMatcher parseFieldMatcher) {
this.parseContext.parseFieldMatcher(parseFieldMatcher);
}
@Override
public ParseFieldMatcher getParseFieldMatcher() {
return parseContext.getParseFieldMatcher();
}
/**
* Returns a new {@link QueryParseContext} to parse template or wrapped queries.
*/
public QueryParseContext newParseContext() {
QueryParseContext queryParseContext = new QueryParseContext(indicesQueriesRegistry);
queryParseContext.parseFieldMatcher(parseContext.getParseFieldMatcher());
return queryParseContext;
}
}
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