package com.alibaba.druid.sql;
import java.util.List;
import com.alibaba.druid.DruidRuntimeException;
import com.alibaba.druid.sql.ast.SQLExpr;
import com.alibaba.druid.sql.ast.SQLObject;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlOutputVisitor;
import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
import com.alibaba.druid.sql.dialect.oracle.visitor.OracleOutputVisitor;
import com.alibaba.druid.sql.dialect.oracle.visitor.OracleSchemaStatVisitor;
import com.alibaba.druid.sql.dialect.postgresql.visitor.PGOutputVisitor;
import com.alibaba.druid.sql.dialect.postgresql.visitor.PGSchemaStatVisitor;
import com.alibaba.druid.sql.dialect.sqlserver.visitor.SQLServerOutputVisitor;
import com.alibaba.druid.sql.dialect.sqlserver.visitor.SQLServerSchemaStatVisitor;
import com.alibaba.druid.sql.parser.ParserException;
import com.alibaba.druid.sql.parser.SQLExprParser;
import com.alibaba.druid.sql.parser.SQLParserUtils;
import com.alibaba.druid.sql.parser.SQLStatementParser;
import com.alibaba.druid.sql.parser.Token;
import com.alibaba.druid.sql.visitor.SQLASTOutputVisitor;
import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
import com.alibaba.druid.util.JdbcUtils;
public class SQLUtils {
public static String toSQLString(SQLObject sqlObject, String dbType) {
if (JdbcUtils.MYSQL.equals(dbType)) {
return toMySqlString(sqlObject);
}
if (JdbcUtils.ORACLE.equals(dbType)) {
return toOracleString(sqlObject);
}
if (JdbcUtils.POSTGRESQL.equals(dbType)) {
return toPGString(sqlObject);
}
return toSQLServerString(sqlObject);
}
public static String toSQLString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new SQLASTOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static String toMySqlString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new MySqlOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static SQLExpr toMySqlExpr(String sql) {
return toSQLExpr(sql, JdbcUtils.MYSQL);
}
public static String formatMySql(String sql) {
return format(sql, JdbcUtils.MYSQL);
}
public static String formatOracle(String sql) {
return format(sql, JdbcUtils.ORACLE);
}
public static String toOracleString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new OracleOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static String toPGString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new PGOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static String toSQLServerString(SQLObject sqlObject) {
StringBuilder out = new StringBuilder();
sqlObject.accept(new SQLServerOutputVisitor(out));
String sql = out.toString();
return sql;
}
public static String formatPGSql(String sql) {
return format(sql, JdbcUtils.POSTGRESQL);
}
public static SQLExpr toSQLExpr(String sql, String dbType) {
SQLExprParser parser = SQLParserUtils.createExprParser(sql, dbType);
SQLExpr expr = parser.expr();
if (parser.getLexer().token() != Token.EOF) {
throw new ParserException("illegal sql expr : " + sql);
}
return expr;
}
public static List<SQLStatement> toStatementList(String sql, String dbType) {
SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
return parser.parseStatementList();
}
public static SQLExpr toSQLExpr(String sql) {
return toSQLExpr(sql, null);
}
public static String format(String sql, String dbType) {
List<SQLStatement> statementList = toStatementList(sql, dbType);
StringBuilder out = new StringBuilder();
SQLASTOutputVisitor visitor = createFormatOutputVisitor(out, statementList, dbType);
for (SQLStatement stmt : statementList) {
stmt.accept(visitor);
}
return out.toString();
}
public static SQLASTOutputVisitor createFormatOutputVisitor(Appendable out, List<SQLStatement> statementList,
String dbType) {
if (JdbcUtils.ORACLE.equals(dbType)) {
if (statementList.size() == 1) {
return new OracleOutputVisitor(out, false);
} else {
return new OracleOutputVisitor(out, true);
}
}
if (JdbcUtils.MYSQL.equals(dbType)) {
return new MySqlOutputVisitor(out);
}
if (JdbcUtils.POSTGRESQL.equals(dbType)) {
return new PGOutputVisitor(out);
}
if (JdbcUtils.SQL_SERVER.equals(dbType)) {
return new SQLServerOutputVisitor(out);
}
if (JdbcUtils.H2.equals(dbType)) {
return new MySqlOutputVisitor(out);
}
return new SQLASTOutputVisitor(out);
}
public static SchemaStatVisitor createSchemaStatVisitor(List<SQLStatement> statementList, String dbType) {
if (JdbcUtils.ORACLE.equals(dbType)) {
if (statementList.size() == 1) {
return new OracleSchemaStatVisitor();
} else {
return new OracleSchemaStatVisitor();
}
}
if (JdbcUtils.MYSQL.equals(dbType)) {
return new MySqlSchemaStatVisitor();
}
if (JdbcUtils.POSTGRESQL.equals(dbType)) {
return new PGSchemaStatVisitor();
}
if (JdbcUtils.SQL_SERVER.equals(dbType)) {
return new SQLServerSchemaStatVisitor();
}
if (JdbcUtils.H2.equals(dbType)) {
return new MySqlSchemaStatVisitor();
}
return new SchemaStatVisitor();
}
public static List<SQLStatement> parseStatements(String sql, String dbType) {
SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
List<SQLStatement> stmtList = parser.parseStatementList();
if (parser.getLexer().token() != Token.EOF) {
throw new DruidRuntimeException("syntax error : " + sql);
}
return stmtList;
}
}