io.trino.json.JsonPathInvocationContext Maven / Gradle / Ivy
/*
* Licensed 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 io.trino.json;
/**
* A class representing state, used by JSON-processing functions: JSON_EXISTS, JSON_VALUE, and JSON_QUERY.
* It is instantiated per driver, and allows gathering and reusing information across the processed rows.
* It contains a JsonPathEvaluator object, which caches ResolvedFunctions used by certain path nodes.
* Caching the ResolvedFunctions addresses the assumption that all or most rows shall provide values
* of the same types to certain JSON path operators.
*/
public class JsonPathInvocationContext
{
private JsonPathEvaluator evaluator;
public JsonPathEvaluator getEvaluator()
{
return evaluator;
}
public void setEvaluator(JsonPathEvaluator evaluator)
{
this.evaluator = evaluator;
}
}