/*
 * 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.dialect.mysql;

import com.google.common.base.Optional;
import io.shardingsphere.core.parsing.antlr.extractor.statement.handler.ASTExtractHandler;
import io.shardingsphere.core.parsing.antlr.extractor.statement.handler.RuleName;
import io.shardingsphere.core.parsing.antlr.extractor.statement.util.ASTUtils;
import io.shardingsphere.core.parsing.parser.sql.SQLStatement;
import io.shardingsphere.core.parsing.parser.token.IndexToken;
import io.shardingsphere.core.util.SQLUtil;
import org.antlr.v4.runtime.ParserRuleContext;

/**
 * Add index extract handler for MySQL.
 * 
 * @author duhongjun
 */
public final class MySQLAddIndexExtractHandler implements ASTExtractHandler {
    
    @Override
    public void extract(final ParserRuleContext ancestorNode, final SQLStatement statement) {
        for (ParserRuleContext each : ASTUtils.getAllDescendantNodes(ancestorNode, RuleName.ADD_INDEX)) {
            Optional<ParserRuleContext> indexNameNode = ASTUtils.findFirstChildNode(each, RuleName.INDEX_NAME);
            if (indexNameNode.isPresent()) {
                statement.getSQLTokens().add(
                        new IndexToken(indexNameNode.get().getStop().getStartIndex(), SQLUtil.getNameWithoutSchema(indexNameNode.get().getText()), statement.getTables().getSingleTableName()));
            }
        }
    }
}

@@ -702,16 +702,64 @@
 mysql;%0A%0A
+import org.antlr.v4.runtime.ParserRuleContext;%0A%0A
 import c
@@ -790,16 +790,17 @@
 tional;%0A
+%0A
 import i
@@ -954,24 +954,312 @@
 handler.
-RuleName
+ASTExtractHandler1;%0Aimport io.shardingsphere.core.parsing.antlr.extractor.statement.handler.RuleName;%0Aimport io.shardingsphere.core.parsing.antlr.extractor.statement.handler.result.ExtractResult;%0Aimport io.shardingsphere.core.parsing.antlr.extractor.statement.handler.result.SQLTokenExtractResult
 ;%0Aimport
@@ -1331,16 +1331,74 @@
 TUtils;%0A
+import io.shardingsphere.core.parsing.lexer.token.Symbol;%0A
 import i
@@ -1549,67 +1549,83 @@
 ore.
-util.SQLUtil;%0Aimport org.antlr.v4.runtime.ParserRuleContext
+parsing.parser.token.TableToken;%0Aimport io.shardingsphere.core.util.SQLUtil
 ;%0A%0A/
@@ -1771,16 +1771,35 @@
 tHandler
+,ASTExtractHandler1
  %7B%0A    %0A
@@ -2437,11 +2437,696 @@
  %7D%0A    %7D
+%0A%0A    @Override%0A    public ExtractResult extract(ParserRuleContext ancestorNode) %7B%0A        SQLTokenExtractResult extractResult = new SQLTokenExtractResult();%0A        for (ParserRuleContext each : ASTUtils.getAllDescendantNodes(ancestorNode, RuleName.ADD_INDEX)) %7B%0A            Optional%3CParserRuleContext%3E indexNameNode = ASTUtils.findFirstChildNode(each, RuleName.INDEX_NAME);%0A            if (indexNameNode.isPresent()) %7B%0A                extractResult.getSqlTokens().add(%0A                        new IndexToken(indexNameNode.get().getStop().getStartIndex(), SQLUtil.getNameWithoutSchema(indexNameNode.get().getText()), null));%0A            %7D%0A        %7D%0A        return extractResult;%0A    %7D
 %0A%7D%0A

implement ASTExtractHandler1