Source code of Windows XP (NT5)
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//***************************************************************************
//
// Copyright (c) 1997-2001 Microsoft Corporation, All Rights Reserved
//
// FRQuery.cpp
//
// Purpose: Query functions
//
//***************************************************************************
#include "precomp.h"
#include <analyser.h>
#include <assertbreak.h>
#include <comdef.h>
#include <FWStrings.h>
#include <vector>
#include <smartptr.h>
#include <brodcast.h>
#include <utils.h>
#include "multiplat.h"
CFrameworkQuery::CFrameworkQuery()
{
m_pLevel1RPNExpression = NULL;
m_QueryType = eUnknown;
m_bKeysOnly = false;
m_IClass = NULL;
m_lFlags = 0;
}
CFrameworkQuery::~CFrameworkQuery()
{
if (m_pLevel1RPNExpression)
{
delete m_pLevel1RPNExpression;
}
if (m_IClass)
{
m_IClass->Release();
}
}
HRESULT CFrameworkQuery::Init(
const BSTR bstrQueryFormat,
const BSTR bstrQuery,
long lFlags,
CHString &sNamespace
)
{
HRESULT hRes = WBEM_S_NO_ERROR;
// Clear out any old values
Reset();
// Start setting our values
m_lFlags = lFlags;
m_bstrtClassName = L"";
m_QueryType = eWQLCommand;
m_sNamespace = sNamespace;
// Check for the obvious
if (_wcsicmp(bstrQueryFormat, IDS_WQL) != 0)
{
hRes = WBEM_E_INVALID_QUERY_TYPE;
LogErrorMessage2(L"Invalid query type: %s", bstrQueryFormat);
}
if (hRes == WBEM_S_NO_ERROR)
{
// Construct the lex source
// ========================
CTextLexSource LexSource(bstrQuery);
// Use the lex source to set up for parser
// =======================================
SQL1_Parser QueryParser(&LexSource);
int ParseRetValue = QueryParser.Parse(&m_pLevel1RPNExpression);
if( SQL1_Parser::SUCCESS == ParseRetValue)
{
// Store some common values
m_bstrtClassName = m_pLevel1RPNExpression->bsClassName;
m_sQuery = bstrQuery;
// Build the Requested Properies Array (m_csaPropertiesRequired)
if (m_pLevel1RPNExpression->nNumberOfProperties > 0)
{
// Populate the m_csaPropertiesRequired array with all the required properties
CHString sPropertyName;
// First add the elements of the Select clause
for (DWORD x=0; x < m_pLevel1RPNExpression->nNumberOfProperties; x++)
{
sPropertyName = m_pLevel1RPNExpression->pbsRequestedPropertyNames[x];
sPropertyName.MakeUpper();
if (IsInList(m_csaPropertiesRequired, sPropertyName) == -1)
{
m_csaPropertiesRequired.Add(sPropertyName);
}
}
// Then add the elements of the where clause
for (x=0; x < m_pLevel1RPNExpression->nNumTokens; x++)
{
if (m_pLevel1RPNExpression->pArrayOfTokens[x].nTokenType == SQL_LEVEL_1_TOKEN::OP_EXPRESSION)
{
sPropertyName = m_pLevel1RPNExpression->pArrayOfTokens[x].pPropertyName;
sPropertyName.MakeUpper();
if (IsInList(m_csaPropertiesRequired, sPropertyName) == -1)
{
m_csaPropertiesRequired.Add(sPropertyName);
}
if (m_pLevel1RPNExpression->pArrayOfTokens[x].pPropName2 != NULL)
{
sPropertyName = m_pLevel1RPNExpression->pArrayOfTokens[x].pPropName2;
sPropertyName.MakeUpper();
if (IsInList(m_csaPropertiesRequired, sPropertyName) == -1)
{
m_csaPropertiesRequired.Add(sPropertyName);
}
}
}
}
}
}
else
{
ASSERT_BREAK(FALSE);
m_pLevel1RPNExpression = NULL;
LogErrorMessage2(L"Can't parse query: %s", bstrQuery);
hRes = WBEM_E_INVALID_QUERY;
}
}
return hRes;
}
HRESULT CFrameworkQuery::Init(
ParsedObjectPath *pParsedObjectPath,
IWbemContext *pCtx,
LPCWSTR lpwszClassName,
CHString &sNamespace
)
{
HRESULT hr = WBEM_S_NO_ERROR;
variant_t vValue;
// Clear out any old values
Reset();
// Start setting our values
m_bstrtClassName = lpwszClassName;
m_QueryType = eContextObject;
m_lFlags = 0;
m_sNamespace = sNamespace;
// Check to see if get extensions are being used
if ( (pCtx != NULL) &&
(SUCCEEDED(pCtx->GetValue( L"__GET_EXTENSIONS", 0, &vValue))) &&
(V_VT(&vValue) == VT_BOOL) &&
(V_BOOL(&vValue) == VARIANT_TRUE) )
{
vValue.Clear();
bool bKeysRequired = false;
// Ok, did they ask for KeysOnly?
// __GET_EXT_PROPERTIES and __GET_EXT_KEYS_ONLY are mutually exclusive. If they
// specified KeysOnly, we'll go with that.
if ( (SUCCEEDED(pCtx->GetValue( L"__GET_EXT_KEYS_ONLY", 0, &vValue))) &&
(V_VT(&vValue) == VT_BOOL) &&
(V_BOOL(&vValue) == VARIANT_TRUE) )
{
LogMessage(L"Recognized __GET_EXT_KEYS_ONLY");
m_bKeysOnly = true;
bKeysRequired = true;
}
else
{
vValue.Clear();
if ( (SUCCEEDED(pCtx->GetValue( L"__GET_EXT_PROPERTIES", 0, &vValue))) &&
(V_VT(&vValue) == (VT_ARRAY | VT_BSTR) ) &&
( SafeArrayGetDim ( V_ARRAY(&vValue) ) == 1 ) )
{
LogMessage(L"Recognized __GET_EXT_PROPERTIES");
// Ok, they sent us an arry of properties. Add them to m_csaPropertiesRequired.
LONG lDimension = 1 ;
LONG lLowerBound ;
SafeArrayGetLBound ( V_ARRAY(&vValue) , lDimension , & lLowerBound ) ;
LONG lUpperBound ;
SafeArrayGetUBound ( V_ARRAY(&vValue) , lDimension , & lUpperBound ) ;
CHString sPropertyName;
for ( long lIndex = lLowerBound ; lIndex <= lUpperBound ; lIndex ++ )
{
BSTR bstrElement ;
HRESULT t_Result = SafeArrayGetElement ( V_ARRAY(&vValue), &lIndex , & bstrElement ) ;
if ( (t_Result == S_OK) &&
(bstrElement != NULL) )
{
try
{
sPropertyName = bstrElement;
}
catch ( ... )
{
SysFreeString(bstrElement);
throw;
}
SysFreeString(bstrElement);
sPropertyName.MakeUpper();
if (IsInList(m_csaPropertiesRequired, sPropertyName) == -1)
{
m_csaPropertiesRequired.Add(sPropertyName);
}
}
}
if ( (IsInList(m_csaPropertiesRequired, L"__RELPATH") != -1) ||
(IsInList(m_csaPropertiesRequired, L"__PATH") != -1) )
{
bKeysRequired = true;
}
}
}
// If they specified KeysOnly or __RELPATH or __Path, we need to add the key properties
// to the list.
if (bKeysRequired)
{
if ((pParsedObjectPath != NULL) && (pParsedObjectPath->m_dwNumKeys > 0) && (pParsedObjectPath->m_paKeys[0]->m_pName != NULL))
{
CHString sPropertyName;
for (DWORD x=0; x < pParsedObjectPath->m_dwNumKeys; x++)
{
sPropertyName = pParsedObjectPath->m_paKeys[x]->m_pName;
sPropertyName.MakeUpper();
if (IsInList(m_csaPropertiesRequired, sPropertyName) == -1)
{
m_csaPropertiesRequired.Add(sPropertyName);
}
}
m_AddKeys = false;
}
else if ( (pParsedObjectPath != NULL) && (pParsedObjectPath->m_bSingletonObj) )
{
m_AddKeys = false;
}
else
{
// If they didn't give us a pParsedObjectPath or if the object path doesn't contain
// the key property name, best we can do is add relpath. Hopefully they'll call
// init2, and it will add the rest.
if (IsInList(m_csaPropertiesRequired, L"__RELPATH") == -1)
{
m_csaPropertiesRequired.Add(L"__RELPATH");
}
}
}
}
return hr;
}
// ===================================================================================================
// Finds out if a particular field was requested by the query. Only
// meaningful if we are in ExecQueryAsync and the query has been
// sucessfully parsed.
bool CFrameworkQuery::IsPropertyRequired(
LPCWSTR propName
)
{
bool bRet = AllPropertiesAreRequired();
if (!bRet)
{
CHString sPropName(propName);
sPropName.MakeUpper();
bRet = (IsInList(m_csaPropertiesRequired, sPropName) != -1);
}
return bRet;
}
// Given a property name, it will return all the values
// that the query requests in a CHStringArray.
// Select * from win32_directory where drive = "C:" GetValuesForProp(L"Drive") -> C:
// Where Drive = "C:" or Drive = "D:" GetValuesForProp(L"Drive") -> C:, D:
// Where Path = "\DOS" GetValuesForProp(L"Drive") -> (empty)
// Where Drive <> "C:" GetValuesForProp(L"Drive") -> (empty)
HRESULT CFrameworkQuery::GetValuesForProp(
LPCWSTR wszPropName,
CHStringArray& achNames
)
{
HRESULT hr = WBEM_S_NO_ERROR;
if (wszPropName && (m_pLevel1RPNExpression != NULL))
{
hr = CQueryAnalyser::GetValuesForProp(m_pLevel1RPNExpression, wszPropName, achNames);
if (SUCCEEDED(hr))
{
// If this is a reference property, we need to normalize the names to a common form
// so the removal of duplicates works correctly.
if (IsReference(wszPropName))
{
// Get the current computer name
CHString sOutPath, sComputerName;
DWORD dwBufferLength = MAX_COMPUTERNAME_LENGTH + 1;
FRGetComputerName(sComputerName.GetBuffer( dwBufferLength ), &dwBufferLength);
sComputerName.ReleaseBuffer();
if (sComputerName.IsEmpty())
{
sComputerName = L"DEFAULT";
}
DWORD dwRet = e_OK;
// Normalize the path names. Try leaving the property names alone
for (int x = 0; x < achNames.GetSize(); x++)
{
// If we failed to parse the path, or if the namespace isn't our namespace, delete
// the entry.
dwRet = NormalizePath(achNames[x], sComputerName, GetNamespace(), 0, sOutPath);
if (dwRet == e_OK)
{
achNames[x] = sOutPath;
}
else if (dwRet == e_NullName)
{
break;
}
else
{
achNames.RemoveAt(x);
x--;
}
}
// If the key property names of any of the values were null, we have to set them all
// to null.
if (dwRet == e_NullName)
{
// Normalize the path names
for (int x = 0; x < achNames.GetSize(); x++)
{
// If we failed to parse the path, or if the namespace isn't our namespace, delete
// the entry.
dwRet = NormalizePath(achNames[x], sComputerName, GetNamespace(), NORMALIZE_NULL, sOutPath);
if (dwRet == e_OK)
{
achNames[x] = sOutPath;
}
else
{
achNames.RemoveAt(x);
x--;
}
}
}
}
// Remove duplicates
for (int x = 1; x < achNames.GetSize(); x++)
{
for (int y = 0; y < x; y++)
{
if (achNames[y].CompareNoCase(achNames[x]) == 0)
{
achNames.RemoveAt(x);
x--;
}
}
}
}
else
{
achNames.RemoveAll();
if (hr == WBEMESS_E_REGISTRATION_TOO_BROAD)
{
hr = WBEM_S_NO_ERROR;
}
}
}
else
{
ASSERT_BREAK(FALSE);
achNames.RemoveAll();
hr = WBEM_E_FAILED;
}
return hr;
}
// Here's an overloaded version in case client wants to pass in a vector of _bstr_t's
HRESULT CFrameworkQuery::GetValuesForProp(
LPCWSTR wszPropName,
std::vector<_bstr_t>& vectorNames
)
{
HRESULT hr = WBEM_S_NO_ERROR;
if (wszPropName && (m_pLevel1RPNExpression != NULL) )
{
hr = CQueryAnalyser::GetValuesForProp(m_pLevel1RPNExpression, wszPropName, vectorNames);
if (SUCCEEDED(hr))
{
// If this is a reference property, we need to normalize the names to a common form
// so the removal of duplicates works correctly.
if (IsReference(wszPropName))
{
// Get the current computer name
CHString sOutPath, sComputerName;
DWORD dwBufferLength = MAX_COMPUTERNAME_LENGTH + 1;
FRGetComputerName(sComputerName.GetBuffer( dwBufferLength ), &dwBufferLength);
sComputerName.ReleaseBuffer();
if (sComputerName.IsEmpty())
{
sComputerName = L"DEFAULT";
}
DWORD dwRet = e_OK;
// Normalize the path names. Try leaving the property names alone
for (int x = 0; x < vectorNames.size(); x++)
{
// If we failed to parse the path, or if the namespace isn't our namespace, delete
// the entry.
dwRet = NormalizePath(vectorNames[x], sComputerName, GetNamespace(), 0, sOutPath);
if (dwRet == e_OK)
{
vectorNames[x] = sOutPath;
}
else if (dwRet == e_NullName)
{
break;
}
else
{
vectorNames.erase(vectorNames.begin() + x);
x--;
}
}
// If the key property names of any of the values were null, we have to set them all
// to null.
if (dwRet == e_NullName)
{
for (int x = 0; x < vectorNames.size(); x++)
{
// If we failed to parse the path, or if the namespace isn't our namespace, delete
// the entry.
dwRet = NormalizePath(vectorNames[x], sComputerName, GetNamespace(), NORMALIZE_NULL, sOutPath);
if (dwRet == e_OK)
{
vectorNames[x] = sOutPath;
}
else
{
vectorNames.erase(vectorNames.begin() + x);
x--;
}
}
}
}
// Remove duplicates
for (int x = 1; x < vectorNames.size(); x++)
{
for (int y = 0; y < x; y++)
{
if (_wcsicmp(vectorNames[y], vectorNames[x]) == 0)
{
vectorNames.erase(vectorNames.begin() + x);
x--;
}
}
}
}
else
{
vectorNames.clear();
if (hr == WBEMESS_E_REGISTRATION_TOO_BROAD)
{
hr = WBEM_S_NO_ERROR;
}
}
}
else
{
ASSERT_BREAK(FALSE);
vectorNames.clear();
hr = WBEM_E_FAILED;
}
return hr;
}
// Returns a list of all the properties specified in the select statement.
// If * is specified as one of the fields, it is returned in the same way as all
// other properties.
void CFrameworkQuery::GetRequiredProperties(
CHStringArray &saProperties
)
{
saProperties.RemoveAll();
saProperties.Copy(m_csaPropertiesRequired);
}
// Initializes the KeysOnly data member. Should never be called by users.
void CFrameworkQuery::Init2(
IWbemClassObject *IClass
)
{
// Store IClass object for use in GetValuesForProp
m_IClass = IClass;
m_IClass->AddRef();
// If KeysOnly get set somewhere else, or if we already know all properties are requried
// there's no point in looking for non-key properties.
if (!m_bKeysOnly && !AllPropertiesAreRequired())
{
// First, we are going to correctly set the m_bKeysOnly member
IWbemQualifierSetPtr pQualSet;
HRESULT hr;
DWORD dwSize = m_csaPropertiesRequired.GetSize();
m_bKeysOnly = true;
for (DWORD x=0; x < dwSize; x++)
{
if (m_csaPropertiesRequired[x].Left(2) != L"__")
{
// If we fail here, it could be due to an invalid property name specified in the query.
if (SUCCEEDED(hr = IClass->GetPropertyQualifierSet( m_csaPropertiesRequired[x] , &pQualSet)))
{
hr = pQualSet->Get( L"Key", 0, NULL, NULL);
if (hr == WBEM_E_NOT_FOUND)
{
m_bKeysOnly = false;
break;
}
else if (FAILED(hr))
{
LogErrorMessage3(L"Can't Get 'key' on %s(%x)", (LPCWSTR)m_csaPropertiesRequired[x], hr);
ASSERT_BREAK(FALSE);
}
}
else
{
if (hr == WBEM_E_NOT_FOUND)
{
// This just means there are properties in the per-property list that don't exist
hr = WBEM_S_NO_ERROR;
}
else
{
LogErrorMessage3(L"Can't get property GetPropertyQualifierSet on %s(%x)", (LPCWSTR)m_csaPropertiesRequired[x], hr);
ASSERT_BREAK(FALSE);
}
}
}
}
}
// Second, if they specified a property list, and one of the properties was __path or __relpath,
// then we need to add the name of the actual key properties to the list. Unless we added them
// somewhere else.
if ( m_AddKeys &&
!AllPropertiesAreRequired() &&
( (IsInList(m_csaPropertiesRequired, L"__RELPATH") != -1) ||
(IsInList(m_csaPropertiesRequired, L"__PATH") != -1) ) )
{
SAFEARRAY *pKeyNames = NULL;
HRESULT hr;
// Get the keys for the class
if (SUCCEEDED(hr = IClass->GetNames(NULL, WBEM_FLAG_KEYS_ONLY, NULL, &pKeyNames)))
{
try
{
BSTR bstrName = NULL ;
CHString sKeyName;
LONG lLBound, lUBound;
SafeArrayGetLBound(pKeyNames, 1, &lLBound);
SafeArrayGetUBound(pKeyNames, 1, &lUBound);
// Walk the key properties, and add any properties that
// are not already in the list
for (long i = lLBound; i <= lUBound; i++)
{
if (SUCCEEDED(SafeArrayGetElement( pKeyNames, &i, &bstrName )))
{
try
{
sKeyName = bstrName;
}
catch ( ... )
{
SysFreeString(bstrName);
throw;
}
SysFreeString(bstrName);
sKeyName.MakeUpper();
if (IsInList(m_csaPropertiesRequired, sKeyName) == -1)
{
m_csaPropertiesRequired.Add(sKeyName);
}
}
else
{
throw CHeap_Exception ( CHeap_Exception :: E_ALLOCATION_ERROR ) ;
}
}
}
catch ( ... )
{
SafeArrayDestroy(pKeyNames);
throw;
}
SafeArrayDestroy(pKeyNames);
}
else
{
LogErrorMessage2(L"Failed to Get keys", hr);
}
}
}
const CHString &CFrameworkQuery::GetQuery()
{
if (m_QueryType == eContextObject)
{
if (m_sQuery.IsEmpty())
{
if (AllPropertiesAreRequired())
{
bstr_t t_Str ( GetQueryClassName() , FALSE) ;
m_sQuery.Format(L"SELECT * FROM %s", (LPCWSTR)t_Str );
}
else if (KeysOnly())
{
bstr_t t_Str ( GetQueryClassName() , FALSE) ;
m_sQuery.Format(L"SELECT __RELPATH FROM %s", (LPCWSTR)t_Str );
}
else
{
m_sQuery = L"SELECT " + m_csaPropertiesRequired[0];
for (DWORD x=1; x < m_csaPropertiesRequired.GetSize(); x++)
{
m_sQuery += L", ";
m_sQuery += m_csaPropertiesRequired[x];
}
m_sQuery += L" FROM ";
bstr_t t_Str ( GetQueryClassName() , FALSE) ;
m_sQuery += t_Str ;
}
}
}
return m_sQuery;
}
/*****************************************************************************
*
* FUNCTION : IsInList
*
* DESCRIPTION : Checks to see if a specified element is in the list
*
* INPUTS : Array to scan, and element
*
* OUTPUTS :
*
* RETURNS : -1 if not in list, else zero based element number
*
* COMMENTS : This routine does a CASE SENSITIVE compare
*
*****************************************************************************/
DWORD CFrameworkQuery::IsInList(
const CHStringArray &csaArray,
LPCWSTR pwszValue
)
{
DWORD dwSize = csaArray.GetSize();
for (DWORD x=0; x < dwSize; x++)
{
// Note this is a CASE SENSITIVE compare
if (wcscmp(csaArray[x], pwszValue) == 0)
{
return x;
}
}
return -1;
}
/*****************************************************************************
*
* FUNCTION : Reset
*
* DESCRIPTION : Zeros out class data members
*
* INPUTS :
*
* OUTPUTS :
*
* RETURNS :
*
* COMMENTS :
*
*****************************************************************************/
void CFrameworkQuery::Reset(void)
{
// Clear out any old values
m_sQuery.Empty();
m_sQueryFormat.Empty();
m_bKeysOnly = false;
m_AddKeys = true;
m_csaPropertiesRequired.RemoveAll();
if (m_pLevel1RPNExpression)
{
delete m_pLevel1RPNExpression;
m_pLevel1RPNExpression = NULL;
}
if (m_IClass)
{
m_IClass->Release();
m_IClass = NULL;
}
}
/*****************************************************************************
*
* FUNCTION : IsReference
*
* DESCRIPTION : Determines whether the specified property is a reference
* property.
*
* INPUTS :
*
* OUTPUTS :
*
* RETURNS :
*
* COMMENTS :
*
*****************************************************************************/
BOOL CFrameworkQuery::IsReference(
LPCWSTR lpwszPropertyName
)
{
BOOL bRet = FALSE;
if (m_IClass != NULL)
{
CIMTYPE ctCimType;
if (SUCCEEDED(m_IClass->Get(lpwszPropertyName, 0, NULL, &ctCimType, NULL)))
{
bRet = ctCimType == CIM_REFERENCE;
}
}
return bRet;
}
/*****************************************************************************
*
* FUNCTION : GetNamespace
*
* DESCRIPTION : Determines whether the specified property is a reference
* property.
*
* INPUTS :
*
* OUTPUTS :
*
* RETURNS :
*
* COMMENTS :
*
*****************************************************************************/
const CHString &CFrameworkQuery::GetNamespace()
{
return m_sNamespace;
};