/*
 * 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 org.antlr.v4.runtime.ParserRuleContext;

import io.shardingsphere.core.parsing.antlr.extractor.statement.handler.result.ExtractResult;
import io.shardingsphere.core.parsing.antlr.extractor.statement.handler.result.SQLTokenExtractResult;
import io.shardingsphere.core.parsing.antlr.extractor.statement.util.ASTUtils;
import io.shardingsphere.core.parsing.parser.sql.SQLStatement;
import io.shardingsphere.core.parsing.parser.sql.ddl.DDLStatement;
import io.shardingsphere.core.parsing.parser.token.IndexToken;
import io.shardingsphere.core.util.SQLUtil;

/**
 * Multiple index names extract handler.
 * 
 * @author duhongjun
 */
public final class IndexesNameExtractHandler implements ASTExtractHandler,ASTExtractHandler1 {
    
    @Override
    public void extract(final ParserRuleContext ancestorNode, final SQLStatement statement) {
        DDLStatement ddlStatement = (DDLStatement) statement;
        String tableName = ddlStatement.getTables().isEmpty() ? "" : ddlStatement.getTables().getSingleTableName();
        for (ParserRuleContext each : ASTUtils.getAllDescendantNodes(ancestorNode, RuleName.INDEX_NAME)) {
            statement.getSQLTokens().add(new IndexToken(each.getStop().getStartIndex(), SQLUtil.getNameWithoutSchema(each.getText()), tableName));
        }
    }

    @Override
    public ExtractResult extract(ParserRuleContext ancestorNode) {
        SQLTokenExtractResult extractResult = new SQLTokenExtractResult();
        for (ParserRuleContext each : ASTUtils.getAllDescendantNodes(ancestorNode, RuleName.INDEX_NAME)) {
            extractResult.getSqlTokens().add(new IndexToken(each.getStop().getStartIndex(), SQLUtil.getNameWithoutSchema(each.getText()), null));
        }
        
        return extractResult;
    }
}

@@ -688,16 +688,46 @@
 ndler;%0A%0A
+import java.util.Collection;%0A%0A
 import o
@@ -2087,24 +2087,204 @@
 storNode) %7B%0A
+        Collection%3CParserRuleContext%3E result = ASTUtils.getAllDescendantNodes(ancestorNode, RuleName.INDEX_NAME);%0A        if(result.isEmpty()) %7B%0A            return null;%0A        %7D%0A
         SQLT
@@ -2388,73 +2388,14 @@
 h : 
-ASTUtils.getAllDescendantNodes(ancestorNode, RuleName.INDEX_NAME)
+result
 ) %7B%0A
@@ -2536,24 +2536,24 @@
 )), null));%0A
+
         %7D%0A  
@@ -2554,17 +2554,8 @@
   %7D%0A
-        %0A
     

extract nothing return null