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The MyBatis SQL mapper framework makes it easier to use a relational database with object-oriented applications. MyBatis couples objects with stored procedures or SQL statements using a XML descriptor or annotations. Simplicity is the biggest advantage of the MyBatis data mapper over object relational mapping tools.

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/**
 *    Copyright 2009-2020 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 org.hzh.mybatis.antlr;

import java.util.ArrayList;
import java.util.List;

import org.antlr.v4.runtime.ParserRuleContext;
import org.antlr.v4.runtime.TokenStream;
import org.antlr.v4.runtime.misc.Interval;
import org.antlr.v4.runtime.tree.ParseTree;

public class AntlrUtils {
	public static String getText(ParserRuleContext ctx, TokenStream tokenStream) {
		int a = ctx.start.getStartIndex();
		int b = ctx.stop.getStopIndex();
		Interval interval = new Interval(a, b);
		return tokenStream.getText(interval);
	}

	public static  List getDecendants(ParserRuleContext ctx, Class clazz) {
		List list = new ArrayList();
		getDecendants(ctx, list, clazz);
		return list;
	}

	@SuppressWarnings("unchecked")
	private static  void getDecendants(ParserRuleContext ctx, List list,
			Class clazz) {
		if (ctx == null) {
			return;
		}
		for (ParseTree child : ctx.children) {
			if (clazz.isAssignableFrom(child.getClass())) {
				list.add((T) child);
			} else if (child instanceof ParserRuleContext) {
				getDecendants((ParserRuleContext) child, list, clazz);
			}
		}
	}
}