/*
* Copyright 1999-2011 Alibaba Group Holding Ltd.
*
* 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.
*/
package com.alibaba.druid.sql.dialect.oracle.parser;
import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListClause;
import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListSingleColumnItem;
import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateStatement;
import com.alibaba.druid.sql.parser.Lexer;
import com.alibaba.druid.sql.parser.ParserException;
import com.alibaba.druid.sql.parser.SQLExprParser;
import com.alibaba.druid.sql.parser.SQLStatementParser;
import com.alibaba.druid.sql.parser.Token;
public class OracleUpdateParser extends SQLStatementParser {
public OracleUpdateParser(String sql) throws ParserException{
super(sql);
}
public OracleUpdateParser(Lexer lexer){
super(lexer);
}
public OracleUpdateStatement parseUpdate() throws ParserException {
accept(Token.UPDATE);
OracleUpdateStatement update = new OracleUpdateStatement();
parseHints(update);
if (identifierEquals("ONLY")) {
update.setOnly(true);
}
update.setTable(this.exprParser.expr());
if ((update.getAlias() == null) || (update.getAlias().length() == 0)) {
update.setAlias(as());
}
parseSet(update);
parseWhere(update);
parseReturn(update);
parseErrorLoging(update);
return update;
}
private void parseErrorLoging(OracleUpdateStatement update) throws ParserException {
if (identifierEquals("LOG")) throw new ParserException("TODO");
}
private void parseReturn(OracleUpdateStatement update) throws ParserException {
if (identifierEquals("RETURN") || identifierEquals("RETURNING")) {
throw new ParserException("TODO");
}
}
private void parseHints(OracleUpdateStatement update) throws ParserException {
if (lexer.token() == Token.HINT) {
throw new ParserException("TODO");
}
}
private void parseWhere(OracleUpdateStatement update) throws ParserException {
if (lexer.token() == (Token.WHERE)) {
lexer.nextToken();
update.setWhere(this.exprParser.expr());
}
}
private void parseSet(OracleUpdateStatement update) throws ParserException {
accept(Token.SET);
if (identifierEquals("VALUE")) {
throw new ParserException("TODO");
}
OracleUpdateSetListClause setListClause = new OracleUpdateSetListClause();
while (true) {
if (lexer.token() == (Token.LPAREN)) {
throw new ParserException("TODO");
}
OracleUpdateSetListSingleColumnItem item = new OracleUpdateSetListSingleColumnItem();
item.setColumn(this.exprParser.primary());
accept(Token.EQ);
item.setValue(this.exprParser.expr());
setListClause.getItems().add(item);
if (!(lexer.token() == (Token.COMMA))) break;
lexer.nextToken();
}
update.setSetClause(setListClause);
}
protected SQLExprParser createExprParser() {
return new OracleExprParser(lexer);
}
}