/*
 * Copyright 2016-2018 shardingsphere.io.
 * <p>
 * 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.
 * </p>
 */

package io.shardingsphere.core.parsing.antlr.extractor.statement.handler;

import com.google.common.base.Optional;
import io.shardingsphere.core.parsing.antlr.extractor.statement.util.ASTUtils;
import io.shardingsphere.core.parsing.antlr.sql.ddl.AlterTableStatement;
import io.shardingsphere.core.parsing.parser.sql.SQLStatement;
import org.antlr.v4.runtime.ParserRuleContext;

/**
 * Rename table extract handler.
 * 
 * @author duhongjun
 */
public final class RenameTableExtractHandler implements ASTExtractHandler {
    
    @Override
    public void extract(final ParserRuleContext ancestorNode, final SQLStatement statement) {
        AlterTableStatement alterStatement = (AlterTableStatement) statement;
        Optional<ParserRuleContext> renameTableNode = ASTUtils.findFirstChildNode(ancestorNode, RuleName.RENAME_TABLE);
        if (renameTableNode.isPresent() && 0 < renameTableNode.get().getChildCount()) {
            alterStatement.setNewTableName(renameTableNode.get().getChild(renameTableNode.get().getChildCount() - 1).getText());
        }
    }
}

@@ -699,39 +699,287 @@
 ort 
-com.google.common.base.Optional
+org.antlr.v4.runtime.ParserRuleContext;%0A%0Aimport com.google.common.base.Optional;%0A%0Aimport io.shardingsphere.core.parsing.antlr.extractor.statement.handler.result.ExtractResult;%0Aimport io.shardingsphere.core.parsing.antlr.extractor.statement.handler.result.RenameTableExtractResult
 ;%0Aim
@@ -1194,55 +1194,8 @@
 ent;
-%0Aimport org.antlr.v4.runtime.ParserRuleContext;
 %0A%0A/*
@@ -1331,16 +1331,35 @@
 tHandler
+,ASTExtractHandler1
  %7B%0A    %0A
@@ -1881,16 +1881,16 @@
 ext());%0A
-
         
@@ -1896,11 +1896,547 @@
  %7D%0A    %7D
+%0A%0A    @Override%0A    public ExtractResult extract(ParserRuleContext ancestorNode) %7B%0A        RenameTableExtractResult extractResult = new RenameTableExtractResult();%0A        Optional%3CParserRuleContext%3E renameTableNode = ASTUtils.findFirstChildNode(ancestorNode, RuleName.RENAME_TABLE);%0A        if (renameTableNode.isPresent() && 0 %3C renameTableNode.get().getChildCount()) %7B%0A            extractResult.setNewTableName(renameTableNode.get().getChild(renameTableNode.get().getChildCount() - 1).getText());%0A        %7D%0A        return null;%0A    %7D
 %0A%7D%0A

implement ASTExtractHandler1