/*
* Copyright 1999-2012 Alibaba Group.
*
* 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.
*/
/**
* (created at 2011-5-19)
*/
package com.alibaba.cobar.parser.recognizer.mysql.syntax;
import static com.alibaba.cobar.parser.recognizer.mysql.MySQLToken.PUNC_COMMA;
import static com.alibaba.cobar.parser.recognizer.mysql.MySQLToken.PUNC_LEFT_PAREN;
import static com.alibaba.cobar.parser.recognizer.mysql.MySQLToken.PUNC_RIGHT_PAREN;
import java.sql.SQLSyntaxErrorException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import com.alibaba.cobar.parser.ast.expression.Expression;
import com.alibaba.cobar.parser.ast.expression.primary.RowExpression;
import com.alibaba.cobar.parser.recognizer.mysql.lexer.MySQLLexer;
/**
* @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
*/
public abstract class MySQLDMLInsertReplaceParser extends MySQLDMLParser {
public MySQLDMLInsertReplaceParser(MySQLLexer lexer, MySQLExprParser exprParser){
super(lexer, exprParser);
}
protected List<RowExpression> rowList() throws SQLSyntaxErrorException {
List<RowExpression> valuesList;
List<Expression> tempRowValue = rowValue();
if (lexer.token() == PUNC_COMMA) {
valuesList = new LinkedList<RowExpression>();
valuesList.add(new RowExpression(tempRowValue));
for (; lexer.token() == PUNC_COMMA;) {
lexer.nextToken();
tempRowValue = rowValue();
valuesList.add(new RowExpression(tempRowValue));
}
} else {
valuesList = new ArrayList<RowExpression>(1);
valuesList.add(new RowExpression(tempRowValue));
}
return valuesList;
}
/**
* first token is <code>(</code>
*/
private List<Expression> rowValue() throws SQLSyntaxErrorException {
match(PUNC_LEFT_PAREN);
if (lexer.token() == PUNC_RIGHT_PAREN) {
return Collections.emptyList();
}
List<Expression> row;
Expression expr = exprParser.expression();
if (lexer.token() == PUNC_COMMA) {
row = new LinkedList<Expression>();
row.add(expr);
for (; lexer.token() == PUNC_COMMA;) {
lexer.nextToken();
expr = exprParser.expression();
row.add(expr);
}
} else {
row = new ArrayList<Expression>(1);
row.add(expr);
}
match(PUNC_RIGHT_PAREN);
return row;
}
}