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mapogcsos.c
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/**********************************************************************
* $Id$
*
* Project: MapServer
* Purpose: OGC SOS implementation
* Author: Y. Assefa, DM Solutions Group ([email protected])
*
**********************************************************************
* Copyright (c) 2006, 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
* DEALINGS IN THE SOFTWARE.
**********************************************************************/
#define _GNU_SOURCE
#include "mapserver.h"
#if defined(USE_SOS_SVR) && defined(USE_LIBXML2)
#include "maperror.h"
#include "mapthread.h"
#include "mapows.h"
#include "maptime.h"
#include "mapgml.h"
#include "mapogcfilter.h"
#include "mapowscommon.h"
#include "maplibxml2.h"
#include "libxml/parser.h"
#include "libxml/tree.h"
#include "libxml/xpath.h"
#include "libxml/xpathInternals.h"
const char *pszSOSVersion = "1.0.0";
const char *pszSOSNamespaceUri = "http://www.opengis.net/sos/1.0";
const char *pszSOSNamespacePrefix = "sos";
const char *pszOMNamespaceUri = "http://www.opengis.net/om/1.0";
const char *pszOMNamespacePrefix = "om";
const char *pszSOSDescribeSensorMimeType = "text/xml; subtype=\"sensorML/1.0.0\"";
const char *pszSOSGetObservationMimeType = "text/xml; subtype=\"om/1.0.0\"";
typedef struct {
char *pszProcedure;
xmlNodePtr psResultNode;
} SOSProcedureNode;
int msSOSParseRequest(mapObj *map, cgiRequestObj *request, sosParamsObj *sosparams);
void msSOSFreeParamsObj(sosParamsObj *sosparams);
/*
** msSOSException()
**
** Report current MapServer error in XML exception format.
** Wrapper function around msOWSCommonExceptionReport. Merely
** passes SOS specific info.
**
*/
static int msSOSException(mapObj *map, char *locator, char *exceptionCode)
{
int size = 0;
char *errorString = NULL;
char *errorMessage = NULL;
char *schemasLocation = NULL;
const char *encoding;
xmlDocPtr psDoc = NULL;
xmlNodePtr psRootNode = NULL;
xmlNsPtr psNsOws = NULL;
xmlChar *buffer = NULL;
psNsOws = xmlNewNs(NULL, BAD_CAST "http://www.opengis.net/ows/1.1", BAD_CAST "ows");
encoding = msOWSLookupMetadata(&(map->web.metadata), "SO", "encoding");
errorString = msGetErrorString("\n");
errorMessage = msEncodeHTMLEntities(errorString);
schemasLocation = msEncodeHTMLEntities(msOWSGetSchemasLocation(map));
psDoc = xmlNewDoc(BAD_CAST "1.0");
psRootNode = msOWSCommonExceptionReport(psNsOws, OWS_1_1_0, schemasLocation, pszSOSVersion, msOWSGetLanguage(map, "exception"), exceptionCode, locator, errorMessage);
xmlDocSetRootElement(psDoc, psRootNode);
xmlNewNs(psRootNode, BAD_CAST "http://www.opengis.net/ows/1.1", BAD_CAST "ows");
if (encoding)
msIO_setHeader("Content-Type","text/xml; charset=%s", encoding);
else
msIO_setHeader("Content-Type","text/xml");
msIO_sendHeaders();
xmlDocDumpFormatMemoryEnc(psDoc, &buffer, &size, (encoding ? encoding : "ISO-8859-1"), 1);
msIO_printf("%s", buffer);
/*free buffer and the document */
free(errorString);
free(errorMessage);
free(schemasLocation);
xmlFree(buffer);
xmlFreeDoc(psDoc);
xmlFreeNs(psNsOws);
/*
** The typical pattern is to call msSOSException() right after
** msSetError(). In order to prevent mapserv.c from re-reporting this
** error at a higher level, we mark it as reported here. #3571
*/
{
errorObj *err = msGetErrorObj();
if( err != NULL && err->code != MS_NOERR )
err->isreported = MS_TRUE;
}
return MS_FAILURE;
}
static int _IsInList(char **papsProcedures, int nDistinctProcedures, char *pszProcedure)
{
int i = 0;
if (papsProcedures && nDistinctProcedures > 0 && pszProcedure) {
for (i=0; i<nDistinctProcedures; i++) {
if (papsProcedures[i] && strcmp(papsProcedures[i], pszProcedure) == 0)
return 1;
}
}
return 0;
}
/************************************************************************/
/* msSOSValidateFilter */
/* */
/* Look if the filter's property names have an equivalent */
/* layre's attribute. */
/************************************************************************/
static int msSOSValidateFilter(FilterEncodingNode *psFilterNode,
layerObj *lp)
{
int i=0, bFound =0;
/* assuming here that the layer is opened*/
if (psFilterNode && lp) {
if (psFilterNode->eType == FILTER_NODE_TYPE_PROPERTYNAME) {
for (i=0; i<lp->numitems; i++) {
if (strcasecmp(lp->items[i], psFilterNode->pszValue) == 0) {
bFound = 1;
break;
}
}
if (!bFound)
return MS_FALSE;
}
if (psFilterNode->psLeftNode && psFilterNode->eType != FILTER_NODE_TYPE_SPATIAL) {
if (msSOSValidateFilter(psFilterNode->psLeftNode, lp) == MS_FALSE)
return MS_FALSE;
}
if (psFilterNode->psRightNode && psFilterNode->eType != FILTER_NODE_TYPE_SPATIAL) {
if (msSOSValidateFilter(psFilterNode->psRightNode, lp) == MS_FALSE)
return MS_FALSE;
}
}
return MS_TRUE;
}
/************************************************************************/
/* msSOSAddMetadataChildNode */
/* */
/* Utility function to add a metadata node. */
/************************************************************************/
void msSOSAddMetadataChildNode(xmlNodePtr psParent, const char *psNodeName,
xmlNsPtr psNs, hashTableObj *metadata,
const char *psNamespaces,
const char *psMetadataName,
const char *psDefaultValue)
{
xmlNodePtr psNode = NULL;
char *psValue = NULL;
if (psParent && psNodeName) {
psValue = msOWSGetEncodeMetadata(metadata, psNamespaces, psMetadataName,
psDefaultValue);
if (psValue) {
psNode = xmlNewChild(psParent, NULL, BAD_CAST psNodeName, BAD_CAST psValue);
if (psNs)
xmlSetNs(psNode, psNs);
free(psValue);
}
}
}
/************************************************************************/
/* msSOSGetFirstLayerForOffering */
/* */
/* return the first layer for the offering. */
/************************************************************************/
layerObj *msSOSGetFirstLayerForOffering(mapObj *map, const char *pszOffering,
const char *pszProperty)
{
layerObj *lp = NULL;
const char *pszTmp = NULL;
int i = 0;
if (pszOffering && map) {
for (i=0; i<map->numlayers; i++) {
pszTmp =
msOWSLookupMetadata(&(GET_LAYER(map, i)->metadata), "S", "offering_id");
if (pszTmp && (strcasecmp(pszTmp, pszOffering) == 0)) {
if (pszProperty) {
pszTmp =
msOWSLookupMetadata(&(GET_LAYER(map, i)->metadata), "S",
"observedproperty_id");
if (pszTmp && (strcasecmp(pszTmp, pszProperty) == 0)) {
lp = (GET_LAYER(map, i));
break;
}
} else {
lp = (GET_LAYER(map, i));
break;
}
}
}
}
return lp;
}
xmlNodePtr msSOSAddTimeNode(xmlNsPtr psNs, xmlNsPtr psNsGml, char *pszStart, char *pszEnd)
{
xmlNodePtr psNode=NULL;
char *timeel= NULL;
if (strcmp((char *)psNs->prefix,"sos") == 0)
timeel = "time";
if (strcmp((char *)psNs->prefix,"om") == 0)
timeel = "samplingTime";
else
timeel = "time";
psNode = xmlNewNode(psNs, BAD_CAST timeel);
xmlAddChild(psNode, msGML3TimePeriod(psNsGml, pszStart, pszEnd));
return psNode;
}
void msSOSAddPropertyNode(xmlNsPtr psNsSwe, xmlNsPtr psNsXLink, xmlNodePtr psParent, layerObj *lp, xmlNsPtr psNsGml, char *pszCompositePhenomenonId)
{
const char *pszValue = NULL;
char *pszTmpVal = NULL, *pszFullName = NULL;
xmlNodePtr psCompNode, psNode;
int i, j=0;
char szTmp[256];
const char *pszComponentBase = "urn:ogc:def:property:";
if (psParent && lp) {
psNode = xmlNewChild(psParent, NULL, BAD_CAST "observedProperty", NULL);
psCompNode = xmlNewChild(psNode, psNsSwe, BAD_CAST "CompositePhenomenon", NULL);
pszValue = msOWSLookupMetadata(&(lp->metadata), "S",
"observedproperty_id");
pszTmpVal = msStrdup(pszValue);
if (pszCompositePhenomenonId != NULL) { /* unique value needs to be constructed */
pszTmpVal = msStringConcatenate(pszTmpVal, "_");
pszTmpVal = msStringConcatenate(pszTmpVal, pszCompositePhenomenonId);
}
if (pszTmpVal) { /*should always be true */
xmlNewNsProp(psCompNode, psNsGml, BAD_CAST "id", BAD_CAST pszTmpVal);
msFree(pszTmpVal);
}
pszValue = msOWSLookupMetadata(&(lp->metadata), "S",
"observedproperty_name");
if (pszValue)
psNode = xmlNewChild(psCompNode, psNsGml,
BAD_CAST "name", BAD_CAST pszValue);
/* add components */
/*assuming that the layer is opened and msLayerGetItems called*/
for(i=0; i<lp->numitems; i++) {
pszValue = msOWSLookupMetadata(&(lp->metadata), "S", "observedproperty_authority");
if (pszValue)
pszTmpVal = msStrdup(pszValue);
else
pszTmpVal = msStrdup("OGC-SWE");
pszFullName = msStrdup(pszComponentBase);
pszFullName = msStringConcatenate(pszFullName, pszTmpVal);
free(pszTmpVal);
pszFullName = msStringConcatenate(pszFullName, ":");
pszValue = msOWSLookupMetadata(&(lp->metadata), "S", "observedproperty_version");
if (pszValue)
pszTmpVal = msStrdup(pszValue);
else
pszTmpVal = msStrdup("1");
pszFullName = msStringConcatenate(pszFullName, pszTmpVal);
free(pszTmpVal);
pszFullName = msStringConcatenate(pszFullName, ":");
snprintf(szTmp, sizeof(szTmp), "%s_alias", lp->items[i]);
pszValue = msOWSLookupMetadata(&(lp->metadata), "S", szTmp);
if (pszValue)
pszTmpVal = msStrdup(pszValue);
else
pszTmpVal = msStrdup(lp->items[i]);
pszFullName = msStringConcatenate(pszFullName, pszTmpVal);
psNode = xmlNewChild(psCompNode, psNsSwe, BAD_CAST "component", NULL);
xmlNewNsProp(psNode, psNsXLink, BAD_CAST "href", BAD_CAST pszFullName);
free(pszFullName);
free(pszTmpVal);
j++;
}
pszTmpVal = msIntToString(j);
xmlNewNsProp(psCompNode, NULL, BAD_CAST "dimension", BAD_CAST pszTmpVal);
free(pszTmpVal);
}
}
/************************************************************************/
/* msSOSAddGeometryNode */
/* */
/* Outout gml 2 gemptry nodes based on a shape. All logic comes */
/* from gmlWriteGeometry_GML2. Should be merged at one point if */
/* possible. */
/************************************************************************/
void msSOSAddGeometryNode(xmlNsPtr psNsGml, xmlNsPtr psNsMs, xmlNodePtr psParent, mapObj *map, layerObj *lp, shapeObj *psShape,
const char *pszEpsg)
{
char *pszTmp = NULL;
int i,j = 0;
xmlNodePtr psPointNode, psNode, psLineNode, psPolygonNode;
int *panOuterList = NULL, *panInnerList = NULL;
if (psParent && psShape) {
if (msProjectionsDiffer(&map->projection, &lp->projection) == MS_TRUE) {
msProjectShape(&lp->projection, &map->projection, psShape);
pszEpsg = msOWSGetEPSGProj(&(map->projection), &(lp->metadata), "SO", MS_TRUE);
}
switch(psShape->type) {
case(MS_SHAPE_POINT):
psNode = xmlNewChild(psParent, NULL, BAD_CAST "msGeometry", NULL);
xmlSetNs(psNode, psNsMs);
if (psShape->line[0].numpoints > 1) {
psPointNode = xmlNewChild(psNode, NULL, BAD_CAST "MultiPoint", NULL);
xmlSetNs(psPointNode, psNsGml);
if (pszEpsg)
xmlNewProp(psPointNode, BAD_CAST "srsName", BAD_CAST pszEpsg);
} else
psPointNode= psNode;
/*add all points */
for(i=0; i<psShape->line[0].numpoints; i++) {
psNode = xmlAddChild(psPointNode, msGML3Point(psNsGml, pszEpsg, NULL, psShape->line[0].point[i].x, psShape->line[0].point[i].y));
}
break;
case(MS_SHAPE_LINE):
psNode = xmlNewChild(psParent, NULL, BAD_CAST "msGeometry", NULL);
xmlSetNs(psNode,xmlNewNs(psNode, NULL, NULL));
if (psShape->numlines > 1) {
psLineNode = xmlNewChild(psNode, NULL, BAD_CAST "MultiLineString", NULL);
xmlSetNs(psLineNode,xmlNewNs(psLineNode,
BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
if (pszEpsg)
xmlNewProp(psLineNode, BAD_CAST "srsName", BAD_CAST pszEpsg);
} else
psLineNode= psNode;
for(i=0; i<psShape->numlines; i++) {
if (psShape->numlines > 1) {
psNode = xmlNewChild(psLineNode, NULL, BAD_CAST "lineStringMember", NULL);
xmlSetNs(psNode,xmlNewNs(psNode,
BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
psNode = xmlNewChild(psNode, NULL, BAD_CAST "LineString", NULL);
xmlSetNs(psNode,xmlNewNs(psNode,
BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
} else {
psNode = xmlNewChild(psLineNode, NULL, BAD_CAST "LineString", NULL);
xmlSetNs(psNode,xmlNewNs(psNode,
BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
}
if (pszEpsg)
xmlNewProp(psNode, BAD_CAST "srsName", BAD_CAST pszEpsg);
pszTmp = NULL;
for(j=0; j<psShape->line[i].numpoints; j++) {
pszTmp = msStringConcatenate(pszTmp,
msDoubleToString(psShape->line[i].point[j].x, MS_TRUE));
pszTmp = msStringConcatenate(pszTmp, ",");
pszTmp = msStringConcatenate(pszTmp,
msDoubleToString(psShape->line[i].point[j].y, MS_TRUE));
pszTmp = msStringConcatenate(pszTmp, " ");
}
psNode = xmlNewChild(psNode, NULL, BAD_CAST "coordinates", BAD_CAST pszTmp);
xmlSetNs(psNode,xmlNewNs(psNode, BAD_CAST "http://www.opengis.net/gml", BAD_CAST "gml"));
free(pszTmp);
}
break;
case(MS_SHAPE_POLYGON):
psNode = xmlNewChild(psParent, NULL, BAD_CAST "msGeometry", NULL);
xmlSetNs(psNode,xmlNewNs(psNode, NULL, NULL));
if (psShape->numlines > 1) {
psPolygonNode = xmlNewChild(psNode, NULL, BAD_CAST "MultiPolygon", NULL);
xmlSetNs(psPolygonNode,
xmlNewNs(psPolygonNode, BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
if (pszEpsg)
xmlNewProp(psPolygonNode, BAD_CAST "srsName", BAD_CAST pszEpsg);
} else
psPolygonNode= psNode;
panOuterList = msGetOuterList(psShape);
for(i=0; i<psShape->numlines; i++) {
if(panOuterList[i] != MS_TRUE)
continue;
panInnerList = msGetInnerList(psShape, i, panOuterList);
if (psShape->numlines > 1) {
psNode = xmlNewChild(psPolygonNode, NULL, BAD_CAST "polygonMember", NULL);
xmlSetNs(psNode,xmlNewNs(psNode, BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
psNode = xmlNewChild(psNode, NULL, BAD_CAST "Polygon", NULL);
xmlSetNs(psNode,xmlNewNs(psNode, BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
} else {
psNode = xmlNewChild(psPolygonNode, NULL, BAD_CAST "Polygon", NULL);
xmlSetNs(psNode,xmlNewNs(psNode, BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
}
if (pszEpsg)
xmlNewProp(psNode, BAD_CAST "srsName", BAD_CAST pszEpsg);
psNode = xmlNewChild(psNode, NULL, BAD_CAST "outerBoundaryIs", NULL);
xmlSetNs(psNode,xmlNewNs(psNode, BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
psNode = xmlNewChild(psNode, NULL, BAD_CAST "LinearRing", NULL);
xmlSetNs(psNode,xmlNewNs(psNode, BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
pszTmp = NULL;
for(j=0; j<psShape->line[i].numpoints; j++) {
pszTmp =
msStringConcatenate(pszTmp,
msDoubleToString(psShape->line[i].point[j].x, MS_TRUE));
pszTmp = msStringConcatenate(pszTmp, ",");
pszTmp =
msStringConcatenate(pszTmp,
msDoubleToString(psShape->line[i].point[j].y, MS_TRUE));
pszTmp = msStringConcatenate(pszTmp, " ");
}
psNode = xmlNewChild(psNode, NULL, BAD_CAST "coordinates", BAD_CAST pszTmp);
xmlSetNs(psNode,xmlNewNs(psNode,
BAD_CAST "http://www.opengis.net/gml",
BAD_CAST "gml"));
free(pszTmp);
if (panInnerList)
free(panInnerList);
}
if (panOuterList)
free(panOuterList);
break;
default:
break;
}
}
}
/************************************************************************/
/* void msSOSAddDataBlockDefinition(xmlNodePtr psParent, */
/* layerObj *lp) */
/* */
/* Add a databalock used for GetObservation request. */
/************************************************************************/
void msSOSAddDataBlockDefinition(xmlNsPtr psNsSwe, xmlNodePtr psParent, layerObj *lp)
{
xmlNodePtr psNode, psRecordNode, psCompNode, psSubNode, psEncNode;
const char *pszDefinition = NULL, *pszUom=NULL, *pszValue=NULL, *pszName=NULL;
char szTmp[100];
int i=0;
char *pszTokenValue = NULL;
char *pszBlockValue = NULL;
const char *pszBlockSep=NULL, *pszTokenSep=NULL;
if (psParent) {
psNode = xmlNewChild(psParent, NULL, BAD_CAST "DataBlockDefinition", NULL);
xmlSetNs(psNode, psNsSwe);
/* -------------------------------------------------------------------- */
/* Add components. */
/* -------------------------------------------------------------------- */
psCompNode = xmlNewChild(psNode, NULL, BAD_CAST "components", NULL);
psEncNode = xmlNewChild(psNode, NULL, BAD_CAST "encoding", NULL);
psRecordNode = xmlNewChild(psCompNode, NULL, BAD_CAST "DataRecord", NULL);
/*always add a time field if timeitem is defined*/
if (msOWSLookupMetadata(&(lp->metadata), "SO", "timeitem")) {
psNode = xmlNewChild(psRecordNode, NULL, BAD_CAST "field", NULL);
xmlNewNsProp(psNode, NULL, BAD_CAST "name", BAD_CAST "time");
psNode = xmlNewChild(psNode, NULL, BAD_CAST "Time", NULL);
xmlNewNsProp(psNode, NULL, BAD_CAST "definition", BAD_CAST "urn:ogc:phenomenon:time:iso8601");
}
/*add all other fields*/
/*assuming that the layer is open */
for(i=0; i<lp->numitems; i++) {
snprintf(szTmp, sizeof(szTmp), "%s_alias", lp->items[i]);
pszValue = msOWSLookupMetadata(&(lp->metadata), "S", szTmp);
if (pszValue) {
psNode = xmlNewChild(psRecordNode, NULL, BAD_CAST "field", NULL);
/* check if there is an alias/full name used */
snprintf(szTmp, sizeof(szTmp), "%s_alias", lp->items[i]);
pszName = msOWSLookupMetadata(&(lp->metadata), "S", szTmp);
if (!pszName)
pszName = lp->items[i];
xmlNewNsProp(psNode, NULL, BAD_CAST "name", BAD_CAST pszName);
psNode = xmlNewChild(psNode, NULL, BAD_CAST "Quantity", NULL);
/* get definition and uom */
snprintf(szTmp, sizeof(szTmp), "%s_definition", lp->items[i]);
pszDefinition = msOWSLookupMetadata(&(lp->metadata), "S", szTmp);
if (pszDefinition == NULL)
pszDefinition = "urn:ogc:object:definition";
xmlNewNsProp(psNode, NULL, BAD_CAST "definition", BAD_CAST pszDefinition);
snprintf(szTmp, sizeof(szTmp), "%s_uom", lp->items[i]);
pszUom = msOWSLookupMetadata(&(lp->metadata), "S", szTmp);
if (pszUom == NULL)
pszUom = "urn:ogc:object:uom";
psNode = xmlNewChild(psNode, NULL, BAD_CAST "uom", NULL);
xmlNewNsProp(psNode, NULL, BAD_CAST "code", BAD_CAST pszUom);
}
}
/* -------------------------------------------------------------------- */
/* Add encoding block. */
/* -------------------------------------------------------------------- */
pszBlockSep = msOWSLookupMetadata(&(lp->map->web.metadata), "S",
"encoding_blockSeparator");
pszTokenSep = msOWSLookupMetadata(&(lp->map->web.metadata), "S",
"encoding_tokenSeparator");
psSubNode = xmlNewChild(psEncNode, NULL, BAD_CAST "TextBlock", NULL);
if (pszTokenSep)
pszTokenValue = msStringConcatenate(pszTokenValue, (char *)pszTokenSep);
else
pszTokenValue = msStringConcatenate(pszTokenValue, ",");
xmlNewNsProp(psSubNode, NULL, BAD_CAST "tokenSeparator", BAD_CAST pszTokenValue);
if (pszBlockSep)
pszBlockValue = msStringConcatenate(pszBlockValue, (char *)pszBlockSep);
else
pszBlockValue = msStringConcatenate(pszBlockValue, "\n");
xmlNewNsProp(psSubNode, NULL, BAD_CAST "blockSeparator", BAD_CAST pszBlockValue);
xmlNewNsProp(psSubNode, NULL, BAD_CAST "decimalSeparator", BAD_CAST ".");
msFree(pszTokenValue);
msFree(pszBlockValue);
}
}
/************************************************************************/
/* msSOSAddMemberNode */
/* */
/* Add a memeber node corresponding to a feature. */
/* Assuming that the layer is opened and msLayerGetItems is */
/* called on it. */
/************************************************************************/
void msSOSAddMemberNode(xmlNsPtr psNsGml, xmlNsPtr psNsOm, xmlNsPtr psNsSwe, xmlNsPtr psNsXLink, xmlNsPtr psNsMs, xmlNodePtr psParent, mapObj *map, layerObj *lp,
int iFeatureId, const char *script_url, const char *opLayerName)
{
xmlNodePtr psObsNode, psNode, psLayerNode = NULL;
const char *pszEpsg = NULL, *pszValue = NULL;
int status,i,j;
shapeObj sShape;
char szTmp[256];
layerObj *lpfirst = NULL;
const char *pszTimeField = NULL;
char *pszTmp = NULL;
char *pszOid = NULL;
char *pszTime = NULL;
char *pszValueShape = NULL;
const char *pszFeatureId = NULL;
if (psParent) {
msInitShape(&sShape);
status = msLayerGetShape(lp, &sShape, &(lp->resultcache->results[iFeatureId]));
if(status != MS_SUCCESS) {
xmlFreeNs(psNsOm);
return;
}
psNode = xmlNewChild(psParent, NULL, BAD_CAST "member", NULL);
psObsNode = xmlNewChild(psNode, NULL, BAD_CAST "Observation", BAD_CAST pszValue);
pszFeatureId = msOWSLookupMetadata(&(lp->metadata), "OSG", "featureid");
if(pszFeatureId && msLayerGetItems(lp) == MS_SUCCESS) {
/* find the featureid amongst the items for this layer */
for(j=0; j<lp->numitems; j++) {
if(strcasecmp(lp->items[j], pszFeatureId) == 0) { /* found it */
break;
}
}
if (j<lp->numitems) {
pszOid = msStringConcatenate(pszOid, "o_");
pszOid = msStringConcatenate(pszOid, sShape.values[j]);
xmlNewNsProp(psObsNode, psNsGml, BAD_CAST "id", BAD_CAST pszOid);
}
}
/* order of elements is time, location, procedure, observedproperty
featureofinterest, result */
/* time*/
pszTimeField = msOWSLookupMetadata(&(lp->metadata), "SO",
"timeitem");
if (pszTimeField && sShape.values) {
for(i=0; i<lp->numitems; i++) {
if (strcasecmp(lp->items[i], pszTimeField) == 0) {
if (sShape.values[i] && strlen(sShape.values[i]) > 0) {
pszTime = msStringConcatenate(pszTime, sShape.values[i]);
psNode = xmlNewChild(psObsNode, psNsOm, BAD_CAST "samplingTime", NULL);
xmlAddChild(psNode, msGML3TimeInstant(psNsGml, pszTime));
msFree(pszTime);
}
break;
}
}
}
/*TODO add location*/
/*procedure*/
/* if a procedure_item is defined, we should extract the value for the
attributes. If not dump what is found in the procedure metadata bug 2054*/
if ((pszValue = msOWSLookupMetadata(&(lp->metadata), "S", "procedure_item"))) {
lpfirst = msSOSGetFirstLayerForOffering(map,
msOWSLookupMetadata(&(lp->metadata), "S",
"offering_id"),
msOWSLookupMetadata(&(lp->metadata), "S",
"observedproperty_id"));
if (lp != lpfirst)
status = msLayerOpen(lpfirst);
if (status == MS_SUCCESS && msLayerGetItems(lpfirst) == MS_SUCCESS) {
for(i=0; i<lpfirst->numitems; i++) {
if (strcasecmp(lpfirst->items[i], pszValue) == 0) {
break;
}
}
if (i < lpfirst->numitems) {
snprintf(szTmp, sizeof(szTmp), "%s", "urn:ogc:def:procedure:");
pszTmp = msStringConcatenate(pszTmp, szTmp);
pszValueShape = msEncodeHTMLEntities(sShape.values[i]);
pszTmp = msStringConcatenate(pszTmp, pszValueShape);
psNode = xmlNewChild(psObsNode, NULL, BAD_CAST "procedure", NULL);
xmlNewNsProp(psNode, psNsXLink, BAD_CAST "href", BAD_CAST pszTmp);
msFree(pszTmp);
pszTmp = NULL;
msFree(pszValueShape);
}
/*else should we generate a warning !*/
if (lp != lpfirst)
msLayerClose(lpfirst);
}
} else if ((pszValue = msOWSLookupMetadata(&(lp->metadata), "S", "procedure"))) {
if (! msOWSLookupMetadata(&(lp->metadata), "S", "procedure_item"))
xmlAddSibling(psNode, xmlNewComment(BAD_CAST "WARNING: Optional metadata \"sos_procedure_item\" missing for sos:procedure. If you have more than 1 procedures, sos:procedure will output them incorrectly."));
snprintf(szTmp, sizeof(szTmp), "%s", "urn:ogc:def:procedure:");
pszTmp = msStringConcatenate(pszTmp, szTmp);
pszTmp = msStringConcatenate(pszTmp, (char *)pszValue);
psNode = xmlNewChild(psObsNode, NULL, BAD_CAST "procedure", NULL);
xmlNewNsProp(psNode, psNsXLink, BAD_CAST "href", BAD_CAST pszTmp);
msFree(pszTmp);
pszTmp = NULL;
}
/*observed property*/
pszValue = msOWSLookupMetadata(&(lp->metadata), "S",
"observedproperty_id");
if (pszValue)
msSOSAddPropertyNode(psNsSwe, psNsXLink, psObsNode, lp, psNsGml, pszOid);
msFree(pszOid);
pszOid = NULL;
/*TODO add featureofinterest*/
pszTmp = msStringConcatenate(pszTmp, (char *) script_url);
pszTmp = msStringConcatenate(pszTmp, "service=WFS&version=1.1.0&request=DescribeFeatureType&typename=");
pszTmp = msStringConcatenate(pszTmp, (char *) opLayerName);
psNode = xmlNewChild(psObsNode, psNsOm, BAD_CAST "featureOfInterest", NULL);
xmlNewNsProp(psNode, psNsXLink, BAD_CAST "href", BAD_CAST pszTmp);
msFree(pszTmp);
pszTmp=NULL;
/* add result : gml:featureMember of all selected elements */
psNode = xmlNewChild(psObsNode, NULL, BAD_CAST "result", NULL);
/*TODO should we add soemwhere the units of the value :
<om:result uom="units.xml#cm">29.00</om:result> */
#ifdef USE_PROJ
if(msProjectionsDiffer(&(lp->projection), &(map->projection)))
msProjectShape(&lp->projection, &lp->projection, &sShape);
#endif
psNode = xmlNewChild(psNode, psNsGml, BAD_CAST "featureMember", NULL);
/* xmlSetNs(psNode,xmlNewNs(psNode, BAD_CAST "http://www.opengis.net/gml", BAD_CAST "gml")); */
/*TODO : add namespaces like wfs " ms and a url to mapserve ? */
psLayerNode = xmlNewChild(psNode, psNsMs, BAD_CAST lp->name, NULL);
/* fetch gml:id */
pszFeatureId = msOWSLookupMetadata(&(lp->metadata), "OSG", "featureid");
if(pszFeatureId && msLayerOpen(lp) == MS_SUCCESS && msLayerGetItems(lp) == MS_SUCCESS)
xmlSetNs(psLayerNode,psNsMs);
/*bbox*/
#ifdef USE_PROJ
pszEpsg = msOWSGetEPSGProj(&(map->projection), &(lp->metadata), "SO", MS_TRUE);
if (!pszEpsg)
pszEpsg = msOWSGetEPSGProj(&(lp->projection), &(lp->metadata), "SO", MS_TRUE);
if (msProjectionsDiffer(&map->projection, &lp->projection) == MS_TRUE)
msProjectRect(&lp->projection, &map->projection, &sShape.bounds);
#endif
psNode = xmlAddChild(psLayerNode, msGML3BoundedBy(psNsGml, sShape.bounds.minx, sShape.bounds.miny, sShape.bounds.maxx, sShape.bounds.maxy, pszEpsg));
/*geometry*/
msSOSAddGeometryNode(psNsGml, psNsMs, psLayerNode, map, lp, &sShape, pszEpsg);
/*attributes */
/* TODO only output attributes where there is a sos_%s_alias (to be discussed)*/
/* the first layer is the one that has to have all the metadata defined */
lpfirst = msSOSGetFirstLayerForOffering(map,
msOWSLookupMetadata(&(lp->metadata), "S",
"offering_id"),
msOWSLookupMetadata(&(lp->metadata), "S",
"observedproperty_id"));
if (lpfirst && msLayerOpen(lpfirst) == MS_SUCCESS &&
msLayerGetItems(lpfirst) == MS_SUCCESS) {
for(i=0; i<lpfirst->numitems; i++) {
snprintf(szTmp, sizeof(szTmp), "%s_alias", lpfirst->items[i]);
pszValue = msOWSLookupMetadata(&(lpfirst->metadata), "S", szTmp);
if (pszValue) {
for (j=0; j<lp->numitems; j++) {
if (strcasecmp(lpfirst->items[i], lpfirst->items[j]) == 0) {
/*if there is an alias used, use it to output the
parameter name : eg "sos_AMMON_DIS_alias" "Amonia" */
snprintf(szTmp, sizeof(szTmp), "%s_alias", lpfirst->items[i]);
pszValue = msOWSLookupMetadata(&(lpfirst->metadata), "S", szTmp);
pszValueShape = msEncodeHTMLEntities(sShape.values[j]);
if (pszValue) {
pszTmp = msEncodeHTMLEntities(pszValue);
psNode = xmlNewChild(psLayerNode, psNsMs, BAD_CAST pszValue,
BAD_CAST pszValueShape);
free(pszTmp);
} else {
pszTmp = msEncodeHTMLEntities(lpfirst->items[i]);
psNode = xmlNewChild(psLayerNode, psNsMs,
BAD_CAST lpfirst->items[i],
BAD_CAST pszValueShape);
free(pszTmp);
}
free(pszValueShape);
xmlSetNs(psNode,psNsMs);
break;
}
}
}
}
if (lp->index != lpfirst->index)
msLayerClose(lpfirst);
}
}
msFreeShape(&sShape);
}
/************************************************************************/
/* msSOSReturnMemberResult */
/* */
/* Add a result string to the result node (used for */
/* GetObservation using "observation" as the response output. */
/* Assuming here that the layer is already opened. */
/************************************************************************/
char* msSOSReturnMemberResult(layerObj *lp, int iFeatureId, char **ppszProcedure)
{
char *pszFinalValue = NULL;
shapeObj sShape;
int i, j, status;
layerObj *lpfirst;
const char *pszTimeField = NULL, *pszValue=NULL, *pszProcedureField=NULL;
char *pszValueShape = NULL;
char szTmp[100];
const char *pszSep=NULL;
msInitShape(&sShape);
status = msLayerGetShape(lp, &sShape, &(lp->resultcache->results[iFeatureId]));
if(status != MS_SUCCESS)
return NULL;
pszTimeField = msOWSLookupMetadata(&(lp->metadata), "SO", "timeitem");
if (pszTimeField && sShape.values) {
for(i=0; i<lp->numitems; i++) {
if (strcasecmp(lp->items[i], pszTimeField) == 0) {
pszFinalValue = msStringConcatenate(pszFinalValue, sShape.values[i]);
break;
}
}
}
if (ppszProcedure) {
pszProcedureField = msOWSLookupMetadata(&(lp->metadata), "S", "procedure_item");
for(i=0; i<lp->numitems; i++) {
if (strcasecmp(lp->items[i], pszProcedureField) == 0) {
(*ppszProcedure) = msStrdup( sShape.values[i]);
break;
}
}
}
/* the first layer is the one that has to have all the metadata defined */
lpfirst = msSOSGetFirstLayerForOffering(lp->map,
msOWSLookupMetadata(&(lp->metadata), "S",
"offering_id"),
msOWSLookupMetadata(&(lp->metadata), "S",
"observedproperty_id"));
if (lp == lpfirst || (lpfirst && msLayerOpen(lpfirst) == MS_SUCCESS &&
msLayerGetItems(lpfirst) == MS_SUCCESS)) {
pszSep = msOWSLookupMetadata(&(lp->map->web.metadata), "S",
"encoding_tokenSeparator");
for(i=0; i<lpfirst->numitems; i++) {
snprintf(szTmp, sizeof(szTmp), "%s_alias", lpfirst->items[i]);
pszValue = msOWSLookupMetadata(&(lpfirst->metadata), "S", szTmp);
if (pszValue) {
for (j=0; j<lp->numitems; j++) {
if (strcasecmp(lpfirst->items[i], lpfirst->items[j]) == 0) {
pszValueShape = msEncodeHTMLEntities(sShape.values[j]);
if (pszFinalValue) {
if (pszSep)
pszFinalValue = msStringConcatenate(pszFinalValue, (char *)pszSep);
else
pszFinalValue = msStringConcatenate(pszFinalValue, ",");
}
pszFinalValue = msStringConcatenate(pszFinalValue, pszValueShape);
msFree(pszValueShape);
}
}
}
}
}
msFreeShape(&sShape);
return pszFinalValue;
}
/************************************************************************/
/* msSOSAddMemberNodeObservation */
/* */
/* Add a member node used for getObservation request using */
/* Observation as the result format. */
/************************************************************************/
xmlNodePtr msSOSAddMemberNodeObservation(xmlNsPtr psNsGml, xmlNsPtr psNsSos, xmlNsPtr psNsOm, xmlNsPtr psNsSwe, xmlNsPtr psNsXLink, xmlNodePtr psParent, mapObj *map, layerObj *lp, const char *pszProcedure)
{
char *pszTmp = NULL;
xmlNodePtr psNode=NULL, psObsNode=NULL, psMemberNode=NULL;
layerObj *lpfirst;
const char *value = NULL;
/*always featch the first layer that has the same offering id and observered propery.
This allows to only define all the attributes and components on the first layer if the user
wants to present several mapserver layers as the same offering.*/
lpfirst = msSOSGetFirstLayerForOffering(map,
msOWSLookupMetadata(&(lp->metadata), "S",
"offering_id"),
msOWSLookupMetadata(&(lp->metadata), "S",
"observedproperty_id"));
if (psParent) {
psMemberNode = xmlNewChild(psParent, NULL, BAD_CAST "member", NULL);
psObsNode = xmlNewChild(psMemberNode, NULL, BAD_CAST "Observation", NULL);
/*time*/
/* ??TODO : sampling time is a manadatory element but uses a non mandatory metadata sos_offering_timeextent */
value = msOWSLookupMetadata(&(lp->metadata), "S", "offering_timeextent");
if (value) {
char **tokens;
int n;
char *pszEndTime = NULL;
tokens = msStringSplit(value, '/', &n);
if (tokens==NULL || (n != 1 && n!=2)) {
msSetError(MS_SOSERR, "Wrong number of arguments for sos_offering_timeextent.",
"msSOSGetObservation()");
msSOSException(map, "sos_offering_timeextent", "InvalidParameterValue");
return NULL;
}
if (n == 2) /* end time is empty. It is going to be set as "now*/
pszEndTime = tokens[1];
psNode = xmlAddChild(psObsNode, msSOSAddTimeNode(psNsOm, psNsGml, tokens[0], pszEndTime));
msFreeCharArray(tokens, n);
}
/* procedure */
if (pszProcedure) { /*this should always be true since procedure is a manadtory element*/
if (! msOWSLookupMetadata(&(lp->metadata), "S", "procedure_item") && msOWSLookupMetadata(&(lp->metadata), "S", "procedure"))
xmlAddSibling(psNode, xmlNewComment(BAD_CAST "WARNING: Optional metadata \"sos_procedure_item\" missing for sos:procedure. If you have more than 1 procedures, sos:procedure will output them incorrectly."));
pszTmp = msStringConcatenate(pszTmp, "urn:ogc:def:procedure:");
pszTmp = msStringConcatenate(pszTmp, (char *)pszProcedure);
psNode = xmlNewChild(psObsNode, NULL, BAD_CAST "procedure", NULL);
/* xmlNewNsProp(psNode, xmlNewNs(NULL, BAD_CAST "http://www.w3.org/1999/xlink", BAD_CAST "xlink"), BAD_CAST "href", BAD_CAST pszTmp); */
xmlNewNsProp(psNode, psNsXLink, BAD_CAST "href", BAD_CAST pszTmp);
msFree(pszTmp);
pszTmp = NULL;
}