/*
 * Copyright 2008-2009 the original author or authors.
 *
 * 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 net.hasor.data.ql.runtime;
import net.hasor.data.ql.UDF;
/**
 * 执行QL 的查询上下文，用于提供 DataUDF 和 环境参数查询。
 * @author 赵永春(zyc@hasor.net)
 * @version : 2017-03-23
 */
public interface QueryContext {
    public UDF findUDF(String udfName);

    public Object get(String name);
}