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mapogcfiltercommon.cpp
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747 lines (646 loc) · 23.6 KB
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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
****************************************************************************/
#include "mapogcfilter.h"
#include "mapserver.h"
#include "mapows.h"
#include "mapowscommon.h"
#include "cpl_minixml.h"
#include <string>
static std::string FLTEscapePropertyName(const char *pszStr,
char chEscapeChar) {
std::string ret;
for (; *pszStr; ++pszStr) {
if (*pszStr == chEscapeChar) {
ret += chEscapeChar;
ret += chEscapeChar;
} else {
ret += *pszStr;
}
}
return ret;
}
std::string msGetLikePatternAsRegex(const FEPropertyIsLike *propIsLike,
const char *pszValue) {
/* From
* http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap09.html#tag_09_04
*/
/* also add double quote because we are within a string */
const char *pszRegexSpecialCharsAndDoubleQuote = "\\^${[().*+?|\"";
const char *pszWild = propIsLike->pszWildCard;
const char *pszSingle = propIsLike->pszSingleChar;
const char *pszEscape = propIsLike->pszEscapeChar;
std::string expr;
const size_t nLength = strlen(pszValue);
if (nLength > 0) {
expr += '^';
}
for (size_t i = 0; i < nLength; i++) {
if (pszValue[i] == pszSingle[0]) {
expr += '.';
/* The Filter escape character is supposed to only escape the single,
* wildcard and escape character */
} else if (pszValue[i] == pszEscape[0] &&
(pszValue[i + 1] == pszSingle[0] ||
pszValue[i + 1] == pszWild[0] ||
pszValue[i + 1] == pszEscape[0])) {
if (pszValue[i + 1] == '\\') {
/* Tricky case: \ must be escaped ncce in the regular expression context
so that the regexp matches it as an ordinary character.
But as \ is also the escape character for MapServer string, we
must escape it again. */
expr += "\\"
"\\"
"\\"
"\\";
} else {
/* If the escaped character is itself a regular expression special
* character */
/* we need to regular-expression-escape-it ! */
if (strchr(pszRegexSpecialCharsAndDoubleQuote, pszValue[i + 1])) {
expr += '\\';
}
expr += pszValue[i + 1];
}
i++;
} else if (pszValue[i] == pszWild[0]) {
expr += ".*";
}
/* Escape regular expressions special characters and double quote */
else if (strchr(pszRegexSpecialCharsAndDoubleQuote, pszValue[i])) {
if (pszValue[i] == '\\') {
/* See above explantation */
expr += "\\"
"\\"
"\\"
"\\";
} else {
expr += '\\';
expr += pszValue[i];
}
} else {
expr += pszValue[i];
}
}
if (nLength > 0) {
expr += '$';
}
return expr;
}
static std::string
FLTGetIsLikeComparisonCommonExpression(const FilterEncodingNode *psFilterNode) {
if (!psFilterNode || !psFilterNode->pOther || !psFilterNode->psLeftNode ||
!psFilterNode->psRightNode || !psFilterNode->psRightNode->pszValue)
return std::string();
const FEPropertyIsLike *propIsLike =
(const FEPropertyIsLike *)psFilterNode->pOther;
const char *pszWild = propIsLike->pszWildCard;
const char *pszSingle = propIsLike->pszSingleChar;
const char *pszEscape = propIsLike->pszEscapeChar;
const bool bCaseInsensitive = propIsLike->bCaseInsensitive != 0;
if (!pszWild || strlen(pszWild) == 0 || !pszSingle ||
strlen(pszSingle) == 0 || !pszEscape || strlen(pszEscape) == 0)
return std::string();
/* -------------------------------------------------------------------- */
/* Use operand with regular expressions. */
/* -------------------------------------------------------------------- */
std::string expr("(\"[");
/* attribute */
expr += FLTEscapePropertyName(psFilterNode->psLeftNode->pszValue, '"');
/* #3521 */
if (bCaseInsensitive)
expr += "]\" ~* \"";
else
expr += "]\" ~ \"";
expr +=
msGetLikePatternAsRegex(propIsLike, psFilterNode->psRightNode->pszValue);
expr += "\")";
return expr;
}
static std::string
FLTGetIsBetweenComparisonCommonExpresssion(FilterEncodingNode *psFilterNode,
layerObj *lp) {
if (psFilterNode->psLeftNode == NULL || psFilterNode->psRightNode == NULL)
return std::string();
/* -------------------------------------------------------------------- */
/* Get the bounds value which are stored like boundmin;boundmax */
/* -------------------------------------------------------------------- */
const auto bounds = msStringSplit(psFilterNode->psRightNode->pszValue, ';');
if (bounds.size() != 2) {
return std::string();
}
/* -------------------------------------------------------------------- */
/* check if the value is a numeric value or alphanumeric. If it */
/* is alphanumeric, add quotes around attribute and values. */
/* -------------------------------------------------------------------- */
bool bString = false;
bool bDateTime = false;
const char *pszType = msOWSLookupMetadata(
&(lp->metadata), "OFG",
(std::string(psFilterNode->psLeftNode->pszValue) + "_type").c_str());
if (pszType != NULL && (strcasecmp(pszType, "Character") == 0))
bString = true;
else if (pszType != NULL && (strcasecmp(pszType, "Date") == 0))
bDateTime = true;
else if (FLTIsNumeric(bounds[0].c_str()) == MS_FALSE)
bString = true;
if (!bString && !bDateTime) {
if (FLTIsNumeric(bounds[1].c_str()) == MS_FALSE)
bString = true;
}
std::string expr;
/* -------------------------------------------------------------------- */
/* build expression. */
/* -------------------------------------------------------------------- */
/* attribute */
if (bString)
expr += "(\"[";
else
expr += "([";
expr += FLTEscapePropertyName(psFilterNode->psLeftNode->pszValue,
bString ? '"' : ']');
if (bString)
expr += "]\" ";
else
expr += "] ";
expr += " >= ";
if (bString) {
expr += '\"';
} else if (bDateTime) {
expr += '`';
}
expr += msStdStringEscape(bounds[0].c_str());
if (bString) {
expr += '\"';
} else if (bDateTime) {
expr += '`';
}
expr += " AND ";
if (bString)
expr += " \"[";
else
expr += " [";
/* attribute */
expr += psFilterNode->psLeftNode->pszValue;
if (bString)
expr += "]\" ";
else
expr += "] ";
expr += " <= ";
if (bString) {
expr += '\"';
} else if (bDateTime) {
expr += '`';
}
expr += msStdStringEscape(bounds[1].c_str());
if (bString) {
expr += '\"';
} else if (bDateTime) {
expr += '`';
}
expr += ')';
return expr;
}
std::string FLTGetBinaryComparisonCommonExpression(layerObj *lp,
const char *pszPropertyName,
bool bForceString,
const char *pszOp,
const char *pszValue) {
assert(pszPropertyName);
assert(pszOp);
/* -------------------------------------------------------------------- */
/* check if the value is a numeric value or alphanumeric. If it */
/* is alphanumeric, add quotes around attribute and values. */
/* -------------------------------------------------------------------- */
bool bString = false;
bool bDateTime = false;
if (pszValue) {
const char *pszType =
msOWSLookupMetadata(&(lp->metadata), "OFG",
(std::string(pszPropertyName) + "_type").c_str());
if (pszType != NULL && (strcasecmp(pszType, "Character") == 0))
bString = true;
else if (pszType != NULL && (strcasecmp(pszType, "Date") == 0))
bDateTime = true;
else if (FLTIsNumeric(pszValue) == MS_FALSE)
bString = true;
}
/* special case to be able to have empty strings in the expression. */
/* propertyislike is always treated as string */
if (!pszValue || bForceString)
bString = true;
/* attribute */
std::string expr;
if (bString)
expr = "(\"[";
else
expr = "([";
expr += FLTEscapePropertyName(pszPropertyName, bString ? '"' : ']');
if (bString)
expr += "]\" ";
else
expr += "] ";
expr += pszOp;
expr += ' ';
/* value */
if (bString) {
expr += "\"";
} else if (bDateTime) {
expr += "`";
}
if (pszValue) {
expr += msStdStringEscape(pszValue);
}
if (bString) {
expr += "\"";
} else if (bDateTime) {
expr += "`";
}
expr += ")";
return expr;
}
static std::string
FLTGetBinaryComparisonCommonExpression(FilterEncodingNode *psFilterNode,
layerObj *lp) {
const char *pszPropertyName = psFilterNode->psLeftNode->pszValue;
const char *pszValue = psFilterNode->psRightNode->pszValue;
const char *pszXMLOp = psFilterNode->pszValue;
if (pszPropertyName && pszXMLOp) {
/* special case to be able to have empty strings in the expression. */
/* propertyislike is always treated as string */
const bool bForceString = (strcasecmp(pszXMLOp, "PropertyIsLike") == 0);
const char *pszOp = nullptr;
if (strcasecmp(pszXMLOp, "PropertyIsEqualTo") == 0) {
/* case insensitive set ? */
if (psFilterNode->psRightNode->pOther &&
(*(int *)psFilterNode->psRightNode->pOther) == 1)
pszOp = "=*";
else
pszOp = "=";
} else if (strcasecmp(pszXMLOp, "PropertyIsNotEqualTo") == 0)
pszOp = "!=";
else if (strcasecmp(pszXMLOp, "PropertyIsLessThan") == 0)
pszOp = "<";
else if (strcasecmp(pszXMLOp, "PropertyIsGreaterThan") == 0)
pszOp = ">";
else if (strcasecmp(pszXMLOp, "PropertyIsLessThanOrEqualTo") == 0)
pszOp = "<=";
else if (strcasecmp(pszXMLOp, "PropertyIsGreaterThanOrEqualTo") == 0)
pszOp = ">=";
else if (strcasecmp(pszXMLOp, "PropertyIsLike") == 0)
pszOp = "~";
else
return std::string();
return FLTGetBinaryComparisonCommonExpression(
lp, pszPropertyName, bForceString, pszOp, pszValue);
}
return std::string();
}
static std::string
FLTGetLogicalComparisonCommonExpression(FilterEncodingNode *psFilterNode,
layerObj *lp) {
std::string expr;
/* -------------------------------------------------------------------- */
/* OR and AND */
/* -------------------------------------------------------------------- */
if (psFilterNode->psLeftNode && psFilterNode->psRightNode) {
char *pszTmp = FLTGetCommonExpression(psFilterNode->psLeftNode, lp);
if (!pszTmp)
return std::string();
expr = '(';
expr += pszTmp;
msFree(pszTmp);
expr += ' ';
expr += psFilterNode->pszValue;
expr += ' ';
pszTmp = FLTGetCommonExpression(psFilterNode->psRightNode, lp);
if (!pszTmp) {
return std::string();
}
expr += pszTmp;
msFree(pszTmp);
expr += ')';
}
/* -------------------------------------------------------------------- */
/* NOT */
/* -------------------------------------------------------------------- */
else if (psFilterNode->psLeftNode &&
strcasecmp(psFilterNode->pszValue, "NOT") == 0) {
char *pszTmp = FLTGetCommonExpression(psFilterNode->psLeftNode, lp);
if (!pszTmp)
return std::string();
expr = "(NOT ";
expr += pszTmp;
msFree(pszTmp);
expr += ')';
}
return expr;
}
static std::string
FLTGetSpatialComparisonCommonExpression(FilterEncodingNode *psNode,
layerObj *lp) {
std::string expr;
double dfDistance = -1;
shapeObj *psTmpShape = NULL;
bool bBBoxQuery = false;
bool bAlreadyReprojected = false;
if (lp == NULL)
return std::string();
/* get the shape */
if (FLTIsBBoxFilter(psNode)) {
rectObj sQueryRect;
FLTGetBBOX(psNode, &sQueryRect);
char szPolygon[512];
snprintf(szPolygon, sizeof(szPolygon),
"POLYGON((%.18f %.18f,%.18f %.18f,%.18f %.18f,%.18f %.18f,%.18f "
"%.18f))",
sQueryRect.minx, sQueryRect.miny, sQueryRect.minx, sQueryRect.maxy,
sQueryRect.maxx, sQueryRect.maxy, sQueryRect.maxx, sQueryRect.miny,
sQueryRect.minx, sQueryRect.miny);
psTmpShape = msShapeFromWKT(szPolygon);
/*
** This is a horrible hack to deal with world-extent requests and
** reprojection. msProjectRect() detects if reprojection from longlat to
** projected SRS, and in that case it transforms the bbox to
*-1e-15,-1e-15,1e15,1e15
** to ensure that all features are returned.
**
** Make wfs_200_cite_filter_bbox_world.xml and
*wfs_200_cite_postgis_bbox_world.xml pass
*/
if (fabs(sQueryRect.minx - -180.0) < 1e-5 &&
fabs(sQueryRect.miny - -90.0) < 1e-5 &&
fabs(sQueryRect.maxx - 180.0) < 1e-5 &&
fabs(sQueryRect.maxy - 90.0) < 1e-5) {
if (lp->projection.numargs > 0) {
projectionObj sProjTmp;
if (psNode->pszSRS) {
msInitProjection(&sProjTmp);
msProjectionInheritContextFrom(&sProjTmp, &lp->projection);
}
if (psNode->pszSRS) {
/* Use the non EPSG variant since axis swapping is done in
* FLTDoAxisSwappingIfNecessary */
if (msLoadProjectionString(&sProjTmp, psNode->pszSRS) == 0) {
msProjectRect(&sProjTmp, &lp->projection, &sQueryRect);
}
} else if (lp->map->projection.numargs > 0)
msProjectRect(&lp->map->projection, &lp->projection, &sQueryRect);
if (psNode->pszSRS)
msFreeProjection(&sProjTmp);
}
if (sQueryRect.minx <= -1e14) {
msFreeShape(psTmpShape);
msFree(psTmpShape);
psTmpShape = (shapeObj *)msSmallMalloc(sizeof(shapeObj));
msInitShape(psTmpShape);
msRectToPolygon(sQueryRect, psTmpShape);
bAlreadyReprojected = true;
}
}
bBBoxQuery = true;
} else {
/* other geos type operations */
/* project shape to layer projection. If the proj is not part of the filter
query, assume that the cooredinates are in the map projection */
int nUnit = -1;
shapeObj *psQueryShape = FLTGetShape(psNode, &dfDistance, &nUnit);
if ((strcasecmp(psNode->pszValue, "DWithin") == 0 ||
strcasecmp(psNode->pszValue, "Beyond") == 0) &&
dfDistance > 0) {
int nLayerUnit = lp->units;
if (nLayerUnit == -1)
nLayerUnit = GetMapserverUnitUsingProj(&lp->projection);
if (nLayerUnit == -1)
nLayerUnit = lp->map->units;
if (nLayerUnit == -1)
nLayerUnit = GetMapserverUnitUsingProj(&lp->map->projection);
if (nUnit >= 0 && nUnit != nLayerUnit)
dfDistance *=
msInchesPerUnit(nUnit, 0) /
msInchesPerUnit(nLayerUnit, 0); /* target is layer units */
}
psTmpShape = psQueryShape;
}
if (psTmpShape) {
/*
** target is layer projection
*/
if (!bAlreadyReprojected && lp->projection.numargs > 0) {
projectionObj sProjTmp;
if (psNode->pszSRS) {
msInitProjection(&sProjTmp);
msProjectionInheritContextFrom(&sProjTmp, &lp->projection);
}
if (psNode->pszSRS) {
/* Use the non EPSG variant since axis swapping is done in
* FLTDoAxisSwappingIfNecessary */
if (msLoadProjectionString(&sProjTmp, psNode->pszSRS) == 0) {
msProjectShape(&sProjTmp, &lp->projection, psTmpShape);
}
} else if (lp->map->projection.numargs > 0)
msProjectShape(&lp->map->projection, &lp->projection, psTmpShape);
if (psNode->pszSRS)
msFreeProjection(&sProjTmp);
}
/* function name */
if (bBBoxQuery) {
expr = "intersects";
} else {
if (strncasecmp(psNode->pszValue, "intersect", 9) == 0)
expr = "intersects";
else {
expr = msStringToLower(std::string(psNode->pszValue));
}
}
/* geometry binding */
expr += "([shape],fromText('";
/* filter geometry */
char *pszWktText = msGEOSShapeToWKT(psTmpShape);
expr += pszWktText ? pszWktText : "Cannot translate shape to WKT";
expr += "')";
msGEOSFreeWKT(pszWktText);
/* (optional) beyond/dwithin distance, always 0.0 since we apply the
* distance as a buffer earlier */
if ((strcasecmp(psNode->pszValue, "DWithin") == 0 ||
strcasecmp(psNode->pszValue, "Beyond") == 0)) {
char szBuffer[32];
snprintf(szBuffer, sizeof(szBuffer), ",%g", dfDistance);
expr += szBuffer;
}
/* terminate the function */
expr += ") = TRUE";
}
/*
** Cleanup
*/
if (bBBoxQuery) {
msFreeShape(psTmpShape);
msFree(psTmpShape);
}
return expr;
}
static std::string
FLTGetFeatureIdCommonExpression(FilterEncodingNode *psFilterNode,
layerObj *lp) {
std::string expr;
#if defined(USE_WMS_SVR) || defined(USE_WFS_SVR) || defined(USE_WCS_SVR) || \
defined(USE_SOS_SVR)
if (psFilterNode->pszValue) {
const char *pszAttribute =
msOWSLookupMetadata(&(lp->metadata), "OFG", "featureid");
if (pszAttribute) {
const auto tokens = msStringSplit(psFilterNode->pszValue, ',');
if (!tokens.empty()) {
bool bString = false;
for (size_t i = 0; i < tokens.size(); i++) {
const char *pszId = tokens[i].c_str();
const char *pszDot = strrchr(pszId, '.');
if (pszDot)
pszId = pszDot + 1;
if (i == 0) {
if (FLTIsNumeric(pszId) == MS_FALSE)
bString = true;
}
if (!expr.empty())
expr += " OR ";
else
expr = '(';
if (bString) {
expr += "(\"[";
expr += FLTEscapePropertyName(pszAttribute, '"');
expr += "]\" == \"";
expr += pszId;
expr += "\")";
} else {
expr += "([";
expr += FLTEscapePropertyName(pszAttribute, ']');
expr += "] == ";
expr += pszId;
expr += ")";
}
}
}
}
/* opening and closing brackets are needed for mapserver expressions */
if (!expr.empty())
expr += ')';
}
#endif
return expr;
}
std::string FLTGetTimeExpression(FilterEncodingNode *psFilterNode,
layerObj *lp) {
if (lp == NULL)
return std::string();
std::string expr;
const char *pszTimeField = nullptr;
const char *pszTimeValue = FLTGetDuring(psFilterNode, &pszTimeField);
if (pszTimeField && pszTimeValue) {
expressionObj old_filter;
msInitExpression(&old_filter);
msCopyExpression(&old_filter, &lp->filter); /* save existing filter */
msFreeExpression(&lp->filter);
if (msLayerSetTimeFilter(lp, pszTimeValue, pszTimeField) == MS_TRUE &&
lp->filter.string) {
expr = lp->filter.string;
}
msCopyExpression(&lp->filter, &old_filter); /* restore old filter */
msFreeExpression(&old_filter);
}
return expr;
}
char *FLTGetCommonExpression(FilterEncodingNode *psFilterNode, layerObj *lp) {
char *pszExpression = NULL;
if (!psFilterNode)
return NULL;
if (psFilterNode->eType == FILTER_NODE_TYPE_COMPARISON) {
if (psFilterNode->psLeftNode && psFilterNode->psRightNode) {
if (FLTIsBinaryComparisonFilterType(psFilterNode->pszValue))
pszExpression = msStrdup(
FLTGetBinaryComparisonCommonExpression(psFilterNode, lp).c_str());
else if (strcasecmp(psFilterNode->pszValue, "PropertyIsLike") == 0)
pszExpression = msStrdup(
FLTGetIsLikeComparisonCommonExpression(psFilterNode).c_str());
else if (strcasecmp(psFilterNode->pszValue, "PropertyIsBetween") == 0)
pszExpression = msStrdup(
FLTGetIsBetweenComparisonCommonExpresssion(psFilterNode, lp)
.c_str());
}
} else if (psFilterNode->eType == FILTER_NODE_TYPE_LOGICAL) {
pszExpression = msStrdup(
FLTGetLogicalComparisonCommonExpression(psFilterNode, lp).c_str());
} else if (psFilterNode->eType == FILTER_NODE_TYPE_SPATIAL) {
pszExpression = msStrdup(
FLTGetSpatialComparisonCommonExpression(psFilterNode, lp).c_str());
} else if (psFilterNode->eType == FILTER_NODE_TYPE_FEATUREID) {
pszExpression =
msStrdup(FLTGetFeatureIdCommonExpression(psFilterNode, lp).c_str());
} else if (psFilterNode->eType == FILTER_NODE_TYPE_TEMPORAL) {
pszExpression = msStrdup(FLTGetTimeExpression(psFilterNode, lp).c_str());
}
return pszExpression;
}
int FLTApplyFilterToLayerCommonExpression(mapObj *map, int iLayerIndex,
const char *pszExpression) {
return FLTApplyFilterToLayerCommonExpressionWithRect(
map, iLayerIndex, pszExpression, map->extent);
}
/* rect must be in map->projection */
int FLTApplyFilterToLayerCommonExpressionWithRect(mapObj *map, int iLayerIndex,
const char *pszExpression,
rectObj rect) {
int retval;
const int save_startindex = map->query.startindex;
const int save_maxfeatures = map->query.maxfeatures;
const int save_only_cache_result_count = map->query.only_cache_result_count;
const int save_cache_shapes = map->query.cache_shapes;
const int save_max_cached_shape_count = map->query.max_cached_shape_count;
const int save_max_cached_shape_ram_amount =
map->query.max_cached_shape_ram_amount;
msInitQuery(&(map->query));
map->query.startindex = save_startindex;
map->query.maxfeatures = save_maxfeatures;
map->query.only_cache_result_count = save_only_cache_result_count;
map->query.cache_shapes = save_cache_shapes;
map->query.max_cached_shape_count = save_max_cached_shape_count;
map->query.max_cached_shape_ram_amount = save_max_cached_shape_ram_amount;
map->query.mode = MS_QUERY_MULTIPLE;
map->query.layer = iLayerIndex;
map->query.rect = rect;
if (pszExpression) {
map->query.type = MS_QUERY_BY_FILTER;
msInitExpression(&map->query.filter);
map->query.filter.string = msStrdup(pszExpression);
map->query.filter.type = MS_EXPRESSION; /* a logical expression */
retval = msQueryByFilter(map);
} else {
map->query.type = MS_QUERY_BY_RECT;
retval = msQueryByRect(map);
}
return retval;
}