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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you 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 .
*/
#include <comphelper/string.hxx>
#include "createparser.hxx"
#include "utils.hxx"
#include <com/sun/star/sdbc/DataType.hpp>
using namespace ::comphelper;
using namespace css::sdbc;
namespace
{
/// Returns substring of sSql from the first occurrence of '(' until the
/// last occurrence of ')' (excluding the parenthesis)
OUString lcl_getColumnPart(const OUString& sSql)
{
sal_Int32 nBeginIndex = sSql.indexOf("(") + 1;
if (nBeginIndex < 0)
{
SAL_WARN("dbaccess", "No column definitions found");
return OUString();
}
sal_Int32 nCount = sSql.lastIndexOf(")") - nBeginIndex;
return sSql.copy(nBeginIndex, nCount);
}
/// Constructs a vector of strings that represents the definitions of each
/// column or constraint.
///
/// @param sColumnPart part of the create statement inside the parenthesis
/// containing the column definitions
std::vector<OUString> lcl_splitColumnPart(const OUString& sColumnPart)
{
std::vector<OUString> sParts = string::split(sColumnPart, sal_Unicode(u','));
std::vector<OUString> sReturn;
OUStringBuffer current;
for (auto const& part : sParts)
{
current.append(part);
if (current.lastIndexOf("(") > current.lastIndexOf(")"))
current.append(","); // it was false split
else
sReturn.push_back(current.makeStringAndClear());
}
return sReturn;
}
sal_Int32 lcl_getAutoIncrementDefault(const OUString& sColumnDef)
{
// TODO what if there are more spaces?
if (sColumnDef.indexOf("GENERATED BY DEFAULT AS IDENTITY") > 0)
{
// TODO parse starting sequence stated by "START WITH"
return 0;
}
return -1;
}
bool lcl_isNullable(const OUString& sColumnDef)
{
if (sColumnDef.indexOf("NOT NULL") >= 0)
{
return false;
}
return true;
}
bool lcl_isPrimaryKey(const OUString& sColumnDef)
{
if (sColumnDef.indexOf("PRIMARY KEY") >= 0)
{
return true;
}
return false;
}
sal_Int32 lcl_getDataTypeFromHsql(const OUString& sTypeName)
{
if (sTypeName == "CHAR")
return DataType::CHAR;
else if (sTypeName == "VARCHAR" || sTypeName == "VARCHAR_IGNORECASE")
return DataType::VARCHAR;
else if (sTypeName == "TINYINT")
return DataType::TINYINT;
else if (sTypeName == "SMALLINT")
return DataType::SMALLINT;
else if (sTypeName == "INTEGER")
return DataType::INTEGER;
else if (sTypeName == "BIGINT")
return DataType::BIGINT;
else if (sTypeName == "NUMERIC")
return DataType::NUMERIC;
else if (sTypeName == "DECIMAL")
return DataType::DECIMAL;
else if (sTypeName == "BOOLEAN")
return DataType::BOOLEAN;
else if (sTypeName == "LONGVARCHAR")
return DataType::LONGVARCHAR;
else if (sTypeName == "LONGVARBINARY")
return DataType::LONGVARBINARY;
else if (sTypeName == "CLOB")
return DataType::CLOB;
else if (sTypeName == "BLOB")
return DataType::BLOB;
else if (sTypeName == "BINARY")
return DataType::BINARY;
else if (sTypeName == "VARBINARY")
return DataType::VARBINARY;
else if (sTypeName == "DATE")
return DataType::DATE;
else if (sTypeName == "TIME")
return DataType::TIME;
else if (sTypeName == "TIMESTAMP")
return DataType::TIMESTAMP;
else if (sTypeName == "DOUBLE")
return DataType::DOUBLE;
else if (sTypeName == "REAL")
return DataType::REAL;
else if (sTypeName == "FLOAT")
return DataType::FLOAT;
assert(false);
return -1;
}
void lcl_addDefaultParameters(std::vector<sal_Int32>& aParams, sal_Int32 eType)
{
if (eType == DataType::CHAR || eType == DataType::BINARY || eType == DataType::VARBINARY
|| eType == DataType::VARCHAR)
aParams.push_back(8000); // from SQL standard
}
} // unnamed namespace
namespace dbahsql
{
CreateStmtParser::CreateStmtParser() {}
void CreateStmtParser::parsePrimaryKeys(const OUString& sPrimaryPart)
{
sal_Int32 nParenPos = sPrimaryPart.indexOf("(");
if (nParenPos > 0)
{
OUString sParamStr
= sPrimaryPart.copy(nParenPos + 1, sPrimaryPart.lastIndexOf(")") - nParenPos - 1);
auto sParams = string::split(sParamStr, sal_Unicode(u','));
for (auto& sParam : sParams)
{
m_PrimaryKeys.push_back(sParam);
}
}
}
void CreateStmtParser::parseColumnPart(const OUString& sColumnPart)
{
auto sColumns = lcl_splitColumnPart(sColumnPart);
for (OUString& sColumn : sColumns)
{
if (sColumn.startsWithIgnoreAsciiCase("PRIMARY KEY"))
{
parsePrimaryKeys(sColumn);
continue;
}
std::vector<OUString> words = string::split(sColumn, sal_Unicode(u' '));
if (words[0] == "CONSTRAINT")
{
m_aForeignParts.push_back(sColumn);
continue;
}
std::vector<sal_Int32> aParams;
OUString sTypeName = words[1];
// TODO what if there is a whitespace between type name and param?
sal_Int32 nParenPos = words[1].indexOf("(");
if (nParenPos > 0)
{
sTypeName = words[1].copy(0, nParenPos);
OUString sParamStr
= words[1].copy(nParenPos + 1, words[1].lastIndexOf(")") - nParenPos - 1);
auto sParams = string::split(sParamStr, sal_Unicode(u','));
for (auto& sParam : sParams)
{
aParams.push_back(sParam.toInt32());
}
}
else
{
lcl_addDefaultParameters(aParams, lcl_getDataTypeFromHsql(sTypeName));
}
bool bCaseInsensitive = sTypeName.indexOf("IGNORECASE") >= 0;
const OUString& rTableName = words[0];
bool isPrimaryKey = lcl_isPrimaryKey(sColumn);
if (isPrimaryKey)
m_PrimaryKeys.push_back(rTableName);
ColumnDefinition aColDef(rTableName, lcl_getDataTypeFromHsql(sTypeName), aParams,
isPrimaryKey, lcl_getAutoIncrementDefault(sColumn),
lcl_isNullable(sColumn), bCaseInsensitive);
m_aColumns.push_back(aColDef);
}
}
void CreateStmtParser::parse(const OUString& sSql)
{
// TODO Foreign keys
if (!sSql.startsWith("CREATE"))
{
SAL_WARN("dbaccess", "Not a create statement");
return;
}
m_sTableName = utils::getTableNameFromStmt(sSql);
OUString sColumnPart = lcl_getColumnPart(sSql);
parseColumnPart(sColumnPart);
}
} // namespace dbahsql
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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