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the hasor DataQL project.

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/*
 * 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.dataql.compiler;
import net.hasor.dataql.compiler.ast.Visitor;
import net.hasor.dataql.runtime.HintsSet;

import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;

/**
 * 查询模型 -> Data QL 的 AST Tree
 * @author 赵永春 ([email protected])
 * @version : 2017-03-23
 */
public interface QueryModel extends Visitor {
    public default String toQueryString() throws IOException {
        StringWriter stringWriter = new StringWriter();
        this.toQueryString(stringWriter);
        return stringWriter.toString();
    }

    public default void toQueryString(Writer writer) throws IOException {
        this.toQueryString(new HintsSet(), writer);
    }

    public void toQueryString(HintsSet formatOptions, Writer writer) throws IOException;
}