/*
 * 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.sqlserver;

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;

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

@@ -706,16 +706,108 @@
 erver;%0A%0A
+import org.antlr.v4.runtime.ParserRuleContext;%0Aimport org.antlr.v4.runtime.tree.ParseTree;%0A%0A
 import c
@@ -838,16 +838,17 @@
 tional;%0A
+%0A
 import i
@@ -1002,24 +1002,312 @@
 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
@@ -1552,55 +1552,8 @@
 til;
-%0Aimport org.antlr.v4.runtime.ParserRuleContext;
 %0A%0A/*
@@ -1716,16 +1716,35 @@
 tHandler
+,ASTExtractHandler1
  %7B%0A    %0A
@@ -2464,11 +2464,792 @@
  %7D%0A    %7D
+%0A%0A    @Override%0A    public ExtractResult extract(ParserRuleContext ancestorNode) %7B%0A        SQLTokenExtractResult extractResult = new SQLTokenExtractResult();%0A        Optional%3CParserRuleContext%3E indexDefOptionNode = ASTUtils.findFirstChildNode(ancestorNode, RuleName.ADD_COLUMN);%0A        if (!indexDefOptionNode.isPresent()) %7B%0A            return extractResult;%0A        %7D%0A        Optional%3CParserRuleContext%3E indexNameNode = ASTUtils.findFirstChildNode(indexDefOptionNode.get(), 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        return extractResult;%0A    %7D
 %0A%7D%0A

implement ASTExtractHandler1