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mapogcfilter.c
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mapogcfilter.c
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/**********************************************************************
* $Id$
*
* Project: MapServer
* Purpose: OGC Filter Encoding implementation
* Author: Y. Assefa, DM Solutions Group (assefa@dmsolutions.ca)
*
**********************************************************************
* Copyright (c) 2003, Y. Assefa, DM Solutions Group Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
****************************************************************************/
#define _GNU_SOURCE
#include "mapserver-config.h"
#ifdef USE_OGR
#include "cpl_minixml.h"
#include "cpl_string.h"
#endif
#include "mapogcfilter.h"
#include "mapserver.h"
#include "mapowscommon.h"
#include "maptime.h"
static int FLTHasUniqueTopLevelDuringFilter(FilterEncodingNode *psFilterNode);
int FLTIsNumeric(const char *pszValue)
{
if (pszValue != NULL && *pszValue != '\0' && !isspace(*pszValue)) {
/*the regex seems to have a problem on windows when mapserver is built using
PHP regex*/
#if defined(_WIN32) && !defined(__CYGWIN__)
int i = 0, nLength=0, bString=0;
nLength = strlen(pszValue);
for (i=0; i<nLength; i++) {
if (i == 0) {
if (!isdigit(pszValue[i]) && pszValue[i] != '-') {
bString = 1;
break;
}
} else if (!isdigit(pszValue[i]) && pszValue[i] != '.') {
bString = 1;
break;
}
}
if (!bString)
return MS_TRUE;
#else
char * p;
if (strtod(pszValue, &p) != 0 || *p == '\0') return MS_TRUE;
#endif
}
return MS_FALSE;
}
/*
** Apply an expression to the layer's filter element.
**
*/
int FLTApplyExpressionToLayer(layerObj *lp, const char *pszExpression)
{
char *pszFinalExpression=NULL, *pszBuffer = NULL;
/*char *escapedTextString=NULL;*/
int bConcatWhere=0, bHasAWhere=0;
if (lp && pszExpression) {
if (lp->connectiontype == MS_POSTGIS || lp->connectiontype == MS_ORACLESPATIAL ||
lp->connectiontype == MS_SDE || lp->connectiontype == MS_PLUGIN) {
pszFinalExpression = msStrdup("(");
pszFinalExpression = msStringConcatenate(pszFinalExpression, pszExpression);
pszFinalExpression = msStringConcatenate(pszFinalExpression, ")");
} else if (lp->connectiontype == MS_OGR) {
pszFinalExpression = msStrdup(pszExpression);
if (lp->filter.type != MS_EXPRESSION) {
bConcatWhere = 1;
} else {
if (lp->filter.string && EQUALN(lp->filter.string,"WHERE ",6)) {
bHasAWhere = 1;
bConcatWhere =1;
}
}
} else
pszFinalExpression = msStrdup(pszExpression);
if (bConcatWhere)
pszBuffer = msStringConcatenate(pszBuffer, "WHERE ");
/* if the filter is set and it's an expression type, concatenate it with
this filter. If not just free it */
if (lp->filter.string && lp->filter.type == MS_EXPRESSION) {
pszBuffer = msStringConcatenate(pszBuffer, "((");
if (bHasAWhere)
pszBuffer = msStringConcatenate(pszBuffer, lp->filter.string+6);
else
pszBuffer = msStringConcatenate(pszBuffer, lp->filter.string);
pszBuffer = msStringConcatenate(pszBuffer, ") and ");
} else if (lp->filter.string)
freeExpression(&lp->filter);
pszBuffer = msStringConcatenate(pszBuffer, pszFinalExpression);
if(lp->filter.string && lp->filter.type == MS_EXPRESSION)
pszBuffer = msStringConcatenate(pszBuffer, ")");
/*assuming that expression was properly escaped
escapedTextString = msStringEscape(pszBuffer);
msLoadExpressionString(&lp->filter,
(char*)CPLSPrintf("%s", escapedTextString));
msFree(escapedTextString);
*/
msLoadExpressionString(&lp->filter, pszBuffer);
msFree(pszFinalExpression);
if (pszBuffer)
msFree(pszBuffer);
return MS_TRUE;
}
return MS_FALSE;
}
char *FLTGetExpressionForValuesRanges(layerObj *lp, const char *item, const char *value, int forcecharcter)
{
int bIscharacter, bSqlLayer;
char *pszExpression = NULL, *pszEscapedStr=NULL, *pszTmpExpression=NULL;
char **paszElements = NULL, **papszRangeElements=NULL;
int numelements,i,nrangeelements;
/* double minval, maxval; */
if (lp && item && value) {
if (lp->connectiontype == MS_POSTGIS || lp->connectiontype == MS_ORACLESPATIAL ||
lp->connectiontype == MS_SDE || lp->connectiontype == MS_PLUGIN)
bSqlLayer = MS_TRUE;
else
bSqlLayer = MS_FALSE;
if (strstr(value, "/") == NULL) {
/*value(s)*/
paszElements = msStringSplit (value, ',', &numelements);
if (paszElements && numelements > 0) {
if (forcecharcter)
bIscharacter = MS_TRUE;
bIscharacter= !FLTIsNumeric(paszElements[0]);
pszTmpExpression = msStringConcatenate(pszTmpExpression, "(");
for (i=0; i<numelements; i++) {
pszTmpExpression = msStringConcatenate(pszTmpExpression, "(");
if (bSqlLayer)
pszTmpExpression = msStringConcatenate(pszTmpExpression, item);
else {
if (bIscharacter)
pszTmpExpression = msStringConcatenate(pszTmpExpression, "\"");
pszTmpExpression = msStringConcatenate(pszTmpExpression, "[");
pszTmpExpression = msStringConcatenate(pszTmpExpression, item);
pszTmpExpression = msStringConcatenate(pszTmpExpression, "]");
if (bIscharacter)
pszTmpExpression = msStringConcatenate(pszTmpExpression, "\"");
}
if (bIscharacter) {
if (bSqlLayer)
pszTmpExpression = msStringConcatenate(pszTmpExpression, " = '");
else
pszTmpExpression = msStringConcatenate(pszTmpExpression, " = \"");
} else
pszTmpExpression = msStringConcatenate(pszTmpExpression, " = ");
pszEscapedStr = msLayerEscapeSQLParam(lp, paszElements[i]);
pszTmpExpression = msStringConcatenate(pszTmpExpression, pszEscapedStr);
if (bIscharacter) {
if (bSqlLayer)
pszTmpExpression = msStringConcatenate(pszTmpExpression, "'");
else
pszTmpExpression = msStringConcatenate(pszTmpExpression, "\"");
}
pszTmpExpression = msStringConcatenate(pszTmpExpression, ")");
msFree(pszEscapedStr);
pszEscapedStr=NULL;
if (pszExpression != NULL)
pszExpression = msStringConcatenate(pszExpression, " OR ");
pszExpression = msStringConcatenate(pszExpression, pszTmpExpression);
msFree(pszTmpExpression);
pszTmpExpression = NULL;
}
pszExpression = msStringConcatenate(pszExpression, ")");
}
msFreeCharArray(paszElements, numelements);
} else {
/*range(s)*/
paszElements = msStringSplit (value, ',', &numelements);
if (paszElements && numelements > 0) {
pszTmpExpression = msStringConcatenate(pszTmpExpression, "(");
for (i=0; i<numelements; i++) {
papszRangeElements = msStringSplit (paszElements[i], '/', &nrangeelements);
if (papszRangeElements && nrangeelements > 0) {
pszTmpExpression = msStringConcatenate(pszTmpExpression, "(");
if (nrangeelements == 2 || nrangeelements == 3) {
/*
minval = atof(papszRangeElements[0]);
maxval = atof(papszRangeElements[1]);
*/
if (bSqlLayer)
pszTmpExpression = msStringConcatenate(pszTmpExpression, item);
else {
pszTmpExpression = msStringConcatenate(pszTmpExpression, "[");
pszTmpExpression = msStringConcatenate(pszTmpExpression, item);
pszTmpExpression = msStringConcatenate(pszTmpExpression, "]");
}
pszTmpExpression = msStringConcatenate(pszTmpExpression, " >= ");
pszEscapedStr = msLayerEscapeSQLParam(lp, papszRangeElements[0]);
pszTmpExpression = msStringConcatenate(pszTmpExpression, pszEscapedStr);
msFree(pszEscapedStr);
pszEscapedStr=NULL;
pszTmpExpression = msStringConcatenate(pszTmpExpression, " AND ");
if (bSqlLayer)
pszTmpExpression = msStringConcatenate(pszTmpExpression, item);
else {
pszTmpExpression = msStringConcatenate(pszTmpExpression, "[");
pszTmpExpression = msStringConcatenate(pszTmpExpression, item);
pszTmpExpression = msStringConcatenate(pszTmpExpression, "]");
}
pszTmpExpression = msStringConcatenate(pszTmpExpression, " <= ");
pszEscapedStr = msLayerEscapeSQLParam(lp, papszRangeElements[1]);
pszTmpExpression = msStringConcatenate(pszTmpExpression, pszEscapedStr);
msFree(pszEscapedStr);
pszEscapedStr=NULL;
pszTmpExpression = msStringConcatenate(pszTmpExpression, ")");
} else if (nrangeelements == 1) {
pszTmpExpression = msStringConcatenate(pszTmpExpression, "(");
if (bSqlLayer)
pszTmpExpression = msStringConcatenate(pszTmpExpression, item);
else {
pszTmpExpression = msStringConcatenate(pszTmpExpression, "[");
pszTmpExpression = msStringConcatenate(pszTmpExpression, item);
pszTmpExpression = msStringConcatenate(pszTmpExpression, "]");
}
pszTmpExpression = msStringConcatenate(pszTmpExpression, " = ");
pszEscapedStr = msLayerEscapeSQLParam(lp, papszRangeElements[0]);
pszTmpExpression = msStringConcatenate(pszTmpExpression, pszEscapedStr);
msFree(pszEscapedStr);
pszEscapedStr=NULL;
pszTmpExpression = msStringConcatenate(pszTmpExpression, ")");
}
if (pszExpression != NULL)
pszExpression = msStringConcatenate(pszExpression, " OR ");
pszExpression = msStringConcatenate(pszExpression, pszTmpExpression);
msFree(pszTmpExpression);
pszTmpExpression = NULL;
}
msFreeCharArray(papszRangeElements, nrangeelements);
}
pszExpression = msStringConcatenate(pszExpression, ")");
}
msFreeCharArray(paszElements, numelements);
}
}
msFree(pszTmpExpression);
return pszExpression;
}
#ifdef USE_OGR
int FLTogrConvertGeometry(OGRGeometryH hGeometry, shapeObj *psShape,
OGRwkbGeometryType nType)
{
return msOGRGeometryToShape(hGeometry, psShape, nType);
}
static
int FLTShapeFromGMLTree(CPLXMLNode *psTree, shapeObj *psShape , char **ppszSRS)
{
const char *pszSRS = NULL;
if (psTree && psShape) {
CPLXMLNode *psNext = psTree->psNext;
OGRGeometryH hGeometry = NULL;
psTree->psNext = NULL;
hGeometry = OGR_G_CreateFromGMLTree(psTree );
psTree->psNext = psNext;
if (hGeometry) {
OGRwkbGeometryType nType;
nType = OGR_G_GetGeometryType(hGeometry);
if (nType == wkbPolygon25D || nType == wkbMultiPolygon25D)
nType = wkbPolygon;
else if (nType == wkbLineString25D || nType == wkbMultiLineString25D)
nType = wkbLineString;
else if (nType == wkbPoint25D || nType == wkbMultiPoint25D)
nType = wkbPoint;
FLTogrConvertGeometry(hGeometry, psShape, nType);
OGR_G_DestroyGeometry(hGeometry);
pszSRS = CPLGetXMLValue(psTree, "srsName", NULL);
if (ppszSRS && pszSRS)
*ppszSRS = msStrdup(pszSRS);
return MS_TRUE;
}
}
return MS_FALSE;
}
int FLTGetGeosOperator(char *pszValue)
{
if (!pszValue)
return -1;
if (strcasecmp(pszValue, "Equals") == 0)
return MS_GEOS_EQUALS;
else if (strcasecmp(pszValue, "Intersect") == 0 ||
strcasecmp(pszValue, "Intersects") == 0)
return MS_GEOS_INTERSECTS;
else if (strcasecmp(pszValue, "Disjoint") == 0)
return MS_GEOS_DISJOINT;
else if (strcasecmp(pszValue, "Touches") == 0)
return MS_GEOS_TOUCHES;
else if (strcasecmp(pszValue, "Crosses") == 0)
return MS_GEOS_CROSSES;
else if (strcasecmp(pszValue, "Within") == 0)
return MS_GEOS_WITHIN;
else if (strcasecmp(pszValue, "Contains") == 0)
return MS_GEOS_CONTAINS;
else if (strcasecmp(pszValue, "Overlaps") == 0)
return MS_GEOS_OVERLAPS;
else if (strcasecmp(pszValue, "Beyond") == 0)
return MS_GEOS_BEYOND;
else if (strcasecmp(pszValue, "DWithin") == 0)
return MS_GEOS_DWITHIN;
return -1;
}
int FLTIsGeosNode(char *pszValue)
{
if (FLTGetGeosOperator(pszValue) == -1)
return MS_FALSE;
return MS_TRUE;
}
/************************************************************************/
/* FLTIsSimpleFilterNoSpatial */
/* */
/* Filter encoding with only attribute queries */
/************************************************************************/
int FLTIsSimpleFilterNoSpatial(FilterEncodingNode *psNode)
{
if (FLTIsSimpleFilter(psNode) &&
FLTNumberOfFilterType(psNode, "BBOX") == 0)
return MS_TRUE;
return MS_FALSE;
}
/************************************************************************/
/* FLTApplySimpleSQLFilter() */
/************************************************************************/
int FLTApplySimpleSQLFilter(FilterEncodingNode *psNode, mapObj *map,
int iLayerIndex)
{
layerObj *lp = NULL;
char *szExpression = NULL;
rectObj sQueryRect = map->extent;
const char *szEPSG = NULL;
projectionObj sProjTmp;
char *pszBuffer = NULL;
int bConcatWhere = 0;
int bHasAWhere =0;
char *pszTmp = NULL, *pszTmp2 = NULL;
char *tmpfilename = NULL;
const char* pszTimeField = NULL;
const char* pszTimeValue = NULL;
lp = (GET_LAYER(map, iLayerIndex));
/* if there is a bbox use it */
szEPSG = FLTGetBBOX(psNode, &sQueryRect);
if(szEPSG && map->projection.numargs > 0) {
msInitProjection(&sProjTmp);
/* Use the non EPSG variant since axis swapping is done in FLTDoAxisSwappingIfNecessary */
if (msLoadProjectionString(&sProjTmp, szEPSG) == 0) {
msProjectRect(&sProjTmp, &map->projection, &sQueryRect);
}
msFreeProjection(&sProjTmp);
}
if( lp->connectiontype == MS_OGR )
{
pszTimeValue = FLTGetDuring(psNode, &pszTimeField);
}
/* make sure that the layer can be queried*/
if (!lp->template)
lp->template = msStrdup("ttt.html");
/* if there is no class, create at least one, so that query by rect
would work*/
if (lp->numclasses == 0) {
if (msGrowLayerClasses(lp) == NULL)
return MS_FAILURE;
initClass(lp->class[0]);
}
bConcatWhere = 0;
bHasAWhere = 0;
if (lp->connectiontype == MS_POSTGIS || lp->connectiontype == MS_ORACLESPATIAL ||
lp->connectiontype == MS_SDE || lp->connectiontype == MS_PLUGIN) {
szExpression = FLTGetSQLExpression(psNode, lp);
if (szExpression) {
pszTmp = msStrdup("(");
pszTmp = msStringConcatenate(pszTmp, szExpression);
pszTmp = msStringConcatenate(pszTmp, ")");
msFree(szExpression);
szExpression = pszTmp;
}
}
/* concatenates the WHERE clause for OGR layers. This only applies if
the expression was empty or not of an expression string. If there
is an sql type expression, it is assumed to have the WHERE clause.
If it is an expression and does not have a WHERE it is assumed to be a mapserver
type expression*/
else if (lp->connectiontype == MS_OGR) {
if (lp->filter.type != MS_EXPRESSION) {
szExpression = FLTGetSQLExpression(psNode, lp);
bConcatWhere = 1;
} else {
if (lp->filter.string && EQUALN(lp->filter.string,"WHERE ",6)) {
szExpression = FLTGetSQLExpression(psNode, lp);
bHasAWhere = 1;
bConcatWhere =1;
} else {
szExpression = FLTGetCommonExpression(psNode, lp);
}
}
} else {
szExpression = FLTGetCommonExpression(psNode, lp);
}
if (szExpression) {
if (bConcatWhere)
pszBuffer = msStringConcatenate(pszBuffer, "WHERE ");
/* if the filter is set and it's an expression type, concatenate it with
this filter. If not just free it */
if (lp->filter.string && lp->filter.type == MS_EXPRESSION) {
pszBuffer = msStringConcatenate(pszBuffer, "((");
if (bHasAWhere)
pszBuffer = msStringConcatenate(pszBuffer, lp->filter.string+6);
else
pszBuffer = msStringConcatenate(pszBuffer, lp->filter.string);
pszBuffer = msStringConcatenate(pszBuffer, ") and ");
} else if (lp->filter.string)
freeExpression(&lp->filter);
pszBuffer = msStringConcatenate(pszBuffer, szExpression);
if(lp->filter.string && lp->filter.type == MS_EXPRESSION)
pszBuffer = msStringConcatenate(pszBuffer, ")");
msLoadExpressionString(&lp->filter, pszBuffer);
free(szExpression);
}
if (pszTimeField && pszTimeValue)
msLayerSetTimeFilter(lp, pszTimeValue, pszTimeField);
if (pszBuffer)
free(pszBuffer);
map->query.type = MS_QUERY_BY_RECT;
map->query.mode = MS_QUERY_MULTIPLE;
map->query.layer = lp->index;
map->query.rect = sQueryRect;
if(map->debug == MS_DEBUGLEVEL_VVV) {
tmpfilename = msTmpFile(map, map->mappath, NULL, "_filter.map");
if (tmpfilename == NULL) {
tmpfilename = msTmpFile(map, NULL, NULL, "_filter.map" );
}
if (tmpfilename) {
msSaveMap(map,tmpfilename);
msDebug("FLTApplySimpleSQLFilter(): Map file after Filter was applied %s\n", tmpfilename);
msFree(tmpfilename);
}
}
/*for oracle connection, if we have a simple filter with no spatial constraints
we should set the connection function to NONE to have a better performance
(#2725)*/
if (lp->connectiontype == MS_ORACLESPATIAL && FLTIsSimpleFilterNoSpatial(psNode)) {
if (strcasestr(lp->data, "USING") == 0)
lp->data = msStringConcatenate(lp->data, " USING NONE");
else if (strcasestr(lp->data, "NONE") == 0) {
/*if one of the functions is used, just replace it with NONE*/
if (strcasestr(lp->data, "FILTER"))
lp->data = msCaseReplaceSubstring(lp->data, "FILTER", "NONE");
else if (strcasestr(lp->data, "GEOMRELATE"))
lp->data = msCaseReplaceSubstring(lp->data, "GEOMRELATE", "NONE");
else if (strcasestr(lp->data, "RELATE"))
lp->data = msCaseReplaceSubstring(lp->data, "RELATE", "NONE");
else if (strcasestr(lp->data, "VERSION")) {
/*should add NONE just before the VERSION. Cases are:
DATA "ORA_GEOMETRY FROM data USING VERSION 10g
DATA "ORA_GEOMETRY FROM data USING UNIQUE FID VERSION 10g"
*/
pszTmp = (char *)strcasestr(lp->data, "VERSION");
pszTmp2 = msStringConcatenate(pszTmp2, " NONE ");
pszTmp2 = msStringConcatenate(pszTmp2, pszTmp);
lp->data = msCaseReplaceSubstring(lp->data, pszTmp, pszTmp2);
msFree(pszTmp2);
} else if (strcasestr(lp->data, "SRID")) {
lp->data = msStringConcatenate(lp->data, " NONE");
}
}
}
return msQueryByRect(map);
/* return MS_SUCCESS; */
}
/************************************************************************/
/* FLTIsSimpleFilter */
/* */
/* Filter encoding with only attribute queries and only one bbox. */
/************************************************************************/
int FLTIsSimpleFilter(FilterEncodingNode *psNode)
{
if (FLTValidForBBoxFilter(psNode)) {
if (FLTNumberOfFilterType(psNode, "DWithin") == 0 &&
FLTNumberOfFilterType(psNode, "Intersect") == 0 &&
FLTNumberOfFilterType(psNode, "Intersects") == 0 &&
FLTNumberOfFilterType(psNode, "Equals") == 0 &&
FLTNumberOfFilterType(psNode, "Disjoint") == 0 &&
FLTNumberOfFilterType(psNode, "Touches") == 0 &&
FLTNumberOfFilterType(psNode, "Crosses") == 0 &&
FLTNumberOfFilterType(psNode, "Within") == 0 &&
FLTNumberOfFilterType(psNode, "Contains") == 0 &&
FLTNumberOfFilterType(psNode, "Overlaps") == 0 &&
FLTNumberOfFilterType(psNode, "Beyond") == 0)
return TRUE;
}
return FALSE;
}
/************************************************************************/
/* FLTApplyFilterToLayer */
/* */
/* Use the filter encoding node to create mapserver expressions */
/* and apply it to the layer. */
/************************************************************************/
int FLTApplyFilterToLayer(FilterEncodingNode *psNode, mapObj *map,
int iLayerIndex)
{
layerObj *layer = GET_LAYER(map, iLayerIndex);
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
return layer->vtable->LayerApplyFilterToLayer(psNode, map, iLayerIndex);
}
/************************************************************************/
/* FLTLayerApplyCondSQLFilterToLayer */
/* */
/* Helper function for layer virtual table architecture */
/************************************************************************/
int FLTLayerApplyCondSQLFilterToLayer(FilterEncodingNode *psNode, mapObj *map,
int iLayerIndex)
{
/* ==================================================================== */
/* Check here to see if it is a simple filter and if that is */
/* the case, we are going to use the FILTER element on */
/* the layer. */
/* ==================================================================== */
layerObj* lp = GET_LAYER(map, iLayerIndex);
if (FLTIsSimpleFilter(psNode) &&
!(lp->connectiontype == MS_OGR && !FLTHasUniqueTopLevelDuringFilter(psNode)) ) {
return FLTApplySimpleSQLFilter(psNode, map, iLayerIndex);
}
return FLTLayerApplyPlainFilterToLayer(psNode, map, iLayerIndex);
}
/************************************************************************/
/* FLTLayerApplyPlainFilterToLayer */
/* */
/* Helper function for layer virtual table architecture */
/************************************************************************/
int FLTLayerApplyPlainFilterToLayer(FilterEncodingNode *psNode, mapObj *map,
int iLayerIndex)
{
char *pszExpression =NULL;
int status =MS_FALSE;
pszExpression = FLTGetCommonExpression(psNode, GET_LAYER(map, iLayerIndex));
if(map->debug == MS_DEBUGLEVEL_VVV)
msDebug("FLTLayerApplyPlainFilterToLayer(): %s\n", pszExpression);
if (pszExpression) {
status = FLTApplyFilterToLayerCommonExpression(map, iLayerIndex, pszExpression);
msFree(pszExpression);
}
return status;
}
/************************************************************************/
/* FilterNode *FLTPaserFilterEncoding(char *szXMLString) */
/* */
/* Parses an Filter Encoding XML string and creates a */
/* FilterEncodingNodes corresponding to the string. */
/* Returns a pointer to the first node or NULL if */
/* unsuccessfull. */
/* Calling function should use FreeFilterEncodingNode function */
/* to free memeory. */
/************************************************************************/
FilterEncodingNode *FLTParseFilterEncoding(const char *szXMLString)
{
CPLXMLNode *psRoot = NULL, *psChild=NULL, *psFilter=NULL;
FilterEncodingNode *psFilterNode = NULL;
if (szXMLString == NULL || strlen(szXMLString) <= 0 ||
(strstr(szXMLString, "Filter") == NULL))
return NULL;
psRoot = CPLParseXMLString(szXMLString);
if( psRoot == NULL)
return NULL;
/* strip namespaces. We srtip all name spaces (#1350)*/
CPLStripXMLNamespace(psRoot, NULL, 1);
/* -------------------------------------------------------------------- */
/* get the root element (Filter). */
/* -------------------------------------------------------------------- */
psFilter = CPLGetXMLNode(psRoot, "=Filter");
if (!psFilter)
{
CPLDestroyXMLNode( psRoot );
return NULL;
}
psChild = psFilter->psChild;
while (psChild) {
if (FLTIsSupportedFilterType(psChild)) {
psFilterNode = FLTCreateFilterEncodingNode();
FLTInsertElementInNode(psFilterNode, psChild);
break;
} else
psChild = psChild->psNext;
}
CPLDestroyXMLNode( psRoot );
/* -------------------------------------------------------------------- */
/* validate the node tree to make sure that all the nodes are valid.*/
/* -------------------------------------------------------------------- */
if (!FLTValidFilterNode(psFilterNode)) {
FLTFreeFilterEncodingNode(psFilterNode);
return NULL;
}
return psFilterNode;
}
/************************************************************************/
/* int FLTValidFilterNode(FilterEncodingNode *psFilterNode) */
/* */
/* Validate that all the nodes are filled properly. We could */
/* have parts of the nodes that are correct and part which */
/* could be incorrect if the filter string sent is corrupted */
/* (eg missing a value :<PropertyName><PropertyName>) */
/************************************************************************/
int FLTValidFilterNode(FilterEncodingNode *psFilterNode)
{
int bReturn = 0;
if (!psFilterNode)
return 0;
if (psFilterNode->eType == FILTER_NODE_TYPE_UNDEFINED)
return 0;
if (psFilterNode->psLeftNode) {
bReturn = FLTValidFilterNode(psFilterNode->psLeftNode);
if (bReturn == 0)
return 0;
else if (psFilterNode->psRightNode)
return FLTValidFilterNode(psFilterNode->psRightNode);
}
return 1;
}
/************************************************************************/
/* FLTIsGeometryFilterNodeType */
/************************************************************************/
static int FLTIsGeometryFilterNodeType(int eType)
{
return (eType == FILTER_NODE_TYPE_GEOMETRY_POINT ||
eType == FILTER_NODE_TYPE_GEOMETRY_LINE ||
eType == FILTER_NODE_TYPE_GEOMETRY_POLYGON);
}
/************************************************************************/
/* FLTFreeFilterEncodingNode */
/* */
/* recursive freeing of Filer Encoding nodes. */
/************************************************************************/
void FLTFreeFilterEncodingNode(FilterEncodingNode *psFilterNode)
{
if (psFilterNode) {
if (psFilterNode->psLeftNode) {
FLTFreeFilterEncodingNode(psFilterNode->psLeftNode);
psFilterNode->psLeftNode = NULL;
}
if (psFilterNode->psRightNode) {
FLTFreeFilterEncodingNode(psFilterNode->psRightNode);
psFilterNode->psRightNode = NULL;
}
if (psFilterNode->pszSRS)
free( psFilterNode->pszSRS);
if( psFilterNode->pOther ) {
if (psFilterNode->pszValue != NULL &&
strcasecmp(psFilterNode->pszValue, "PropertyIsLike") == 0) {
FEPropertyIsLike* propIsLike = (FEPropertyIsLike *)psFilterNode->pOther;
if( propIsLike->pszWildCard )
free( propIsLike->pszWildCard );
if( propIsLike->pszSingleChar )
free( propIsLike->pszSingleChar );
if( propIsLike->pszEscapeChar )
free( propIsLike->pszEscapeChar );
} else if (FLTIsGeometryFilterNodeType(psFilterNode->eType)) {
msFreeShape((shapeObj *)(psFilterNode->pOther));
}
/* else */
/* TODO free pOther special fields */
free( psFilterNode->pOther );
}
/* Cannot free pszValue before, 'cause we are testing it above */
if( psFilterNode->pszValue )
free( psFilterNode->pszValue );
free(psFilterNode);
}
}
/************************************************************************/
/* FLTCreateFilterEncodingNode */
/* */
/* return a FilerEncoding node. */
/************************************************************************/
FilterEncodingNode *FLTCreateFilterEncodingNode(void)
{
FilterEncodingNode *psFilterNode = NULL;
psFilterNode =
(FilterEncodingNode *)malloc(sizeof (FilterEncodingNode));
psFilterNode->eType = FILTER_NODE_TYPE_UNDEFINED;
psFilterNode->pszValue = NULL;
psFilterNode->pOther = NULL;
psFilterNode->pszSRS = NULL;
psFilterNode->psLeftNode = NULL;
psFilterNode->psRightNode = NULL;
return psFilterNode;
}
FilterEncodingNode *FLTCreateBinaryCompFilterEncodingNode(void)
{
FilterEncodingNode *psFilterNode = NULL;
psFilterNode = FLTCreateFilterEncodingNode();
/* used to store case sensitivity flag. Default is 0 meaning the
comparing is case sensititive */
psFilterNode->pOther = (int *)malloc(sizeof(int));
(*(int *)(psFilterNode->pOther)) = 0;
return psFilterNode;
}
/************************************************************************/
/* FLTFindGeometryNode */
/* */
/************************************************************************/
static CPLXMLNode* FLTFindGeometryNode(CPLXMLNode* psXMLNode,
int* pbPoint,
int* pbLine,
int* pbPolygon)
{
CPLXMLNode *psGMLElement = NULL;
psGMLElement = CPLGetXMLNode(psXMLNode, "Point");
if (!psGMLElement)
psGMLElement = CPLGetXMLNode(psXMLNode, "PointType");
if (psGMLElement)
*pbPoint =1;
else {
psGMLElement= CPLGetXMLNode(psXMLNode, "Polygon");
if (psGMLElement)
*pbPolygon = 1;
else if ((psGMLElement= CPLGetXMLNode(psXMLNode, "MultiPolygon")))
*pbPolygon = 1;
else if ((psGMLElement= CPLGetXMLNode(psXMLNode, "Surface")))
*pbPolygon = 1;
else if ((psGMLElement= CPLGetXMLNode(psXMLNode, "MultiSurface")))
*pbPolygon = 1;
else if ((psGMLElement= CPLGetXMLNode(psXMLNode, "Box")))
*pbPolygon = 1;
else if ((psGMLElement= CPLGetXMLNode(psXMLNode, "LineString")))
*pbLine = 1;
else if ((psGMLElement= CPLGetXMLNode(psXMLNode, "MultiLineString")))
*pbLine = 1;
else if ((psGMLElement= CPLGetXMLNode(psXMLNode, "Curve")))
*pbLine = 1;
else if ((psGMLElement= CPLGetXMLNode(psXMLNode, "MultiCurve")))
*pbLine = 1;
else if ((psGMLElement= CPLGetXMLNode(psXMLNode, "MultiPoint")))
*pbPoint = 1;
}
return psGMLElement;
}
/************************************************************************/
/* FLTGetPropertyName */
/************************************************************************/
static const char* FLTGetPropertyName(CPLXMLNode* psXMLNode)
{
const char* pszPropertyName;
pszPropertyName = CPLGetXMLValue(psXMLNode, "PropertyName", NULL);
if( pszPropertyName == NULL ) /* FE 2.0 ? */
pszPropertyName = CPLGetXMLValue(psXMLNode, "ValueReference", NULL);
return pszPropertyName;
}
/************************************************************************/
/* FLTGetFirstChildNode */
/************************************************************************/
static CPLXMLNode* FLTGetFirstChildNode(CPLXMLNode* psXMLNode)
{
if( psXMLNode == NULL )
return NULL;
psXMLNode = psXMLNode->psChild;
while( psXMLNode != NULL )
{
if( psXMLNode->eType == CXT_Element )
return psXMLNode;
psXMLNode = psXMLNode->psNext;
}
return NULL;
}
/************************************************************************/
/* FLTGetNextSibblingNode */
/************************************************************************/
static CPLXMLNode* FLTGetNextSibblingNode(CPLXMLNode* psXMLNode)
{
if( psXMLNode == NULL )
return NULL;
psXMLNode = psXMLNode->psNext;
while( psXMLNode != NULL )
{
if( psXMLNode->eType == CXT_Element )
return psXMLNode;
psXMLNode = psXMLNode->psNext;
}
return NULL;
}
/************************************************************************/
/* FLTInsertElementInNode */
/* */
/* Utility function to parse an XML node and transfter the */
/* contennts into the Filer Encoding node structure. */
/************************************************************************/
void FLTInsertElementInNode(FilterEncodingNode *psFilterNode,
CPLXMLNode *psXMLNode)
{
int nStrLength = 0;
char *pszTmp = NULL;
FilterEncodingNode *psCurFilNode= NULL;
CPLXMLNode *psCurXMLNode = NULL;
CPLXMLNode *psTmpNode = NULL;
CPLXMLNode *psFeatureIdNode = NULL;
const char *pszFeatureId=NULL;
char *pszFeatureIdList=NULL;
if (psFilterNode && psXMLNode && psXMLNode->pszValue) {
psFilterNode->pszValue = msStrdup(psXMLNode->pszValue);
psFilterNode->psLeftNode = NULL;
psFilterNode->psRightNode = NULL;
/* -------------------------------------------------------------------- */
/* Logical filter. AND, OR and NOT are supported. Example of */
/* filer using logical filters : */
/* <Filter> */
/* <And> */
/* <PropertyIsGreaterThan> */
/* <PropertyName>Person/Age</PropertyName> */
/* <Literal>50</Literal> */
/* </PropertyIsGreaterThan> */
/* <PropertyIsEqualTo> */
/* <PropertyName>Person/Address/City</PropertyName> */
/* <Literal>Toronto</Literal> */
/* </PropertyIsEqualTo> */
/* </And> */
/* </Filter> */
/* -------------------------------------------------------------------- */
if (FLTIsLogicalFilterType(psXMLNode->pszValue)) {
psFilterNode->eType = FILTER_NODE_TYPE_LOGICAL;
if (strcasecmp(psFilterNode->pszValue, "AND") == 0 ||
strcasecmp(psFilterNode->pszValue, "OR") == 0) {
CPLXMLNode* psFirstNode = FLTGetFirstChildNode(psXMLNode);
CPLXMLNode* psSecondNode = FLTGetNextSibblingNode(psFirstNode);
if (psFirstNode && psSecondNode) {
/*2 operators */
CPLXMLNode* psNextNode = FLTGetNextSibblingNode(psSecondNode);
if (psNextNode == NULL) {
psFilterNode->psLeftNode = FLTCreateFilterEncodingNode();
FLTInsertElementInNode(psFilterNode->psLeftNode, psFirstNode);
psFilterNode->psRightNode = FLTCreateFilterEncodingNode();
FLTInsertElementInNode(psFilterNode->psRightNode, psSecondNode);
} else {
psCurXMLNode = psFirstNode;
psCurFilNode = psFilterNode;
while(psCurXMLNode) {