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arangodb/VocBase/index.c

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////////////////////////////////////////////////////////////////////////////////
/// @brief index
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2010-2011 triagens GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
/// @author Copyright 2011, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////
#include "index.h"
#include <BasicsC/conversions.h>
#include <BasicsC/files.h>
#include <BasicsC/json.h>
#include <BasicsC/logging.h>
#include <BasicsC/strings.h>
#include <VocBase/simple-collection.h>
#include "ShapedJson/shaped-json.h"
#include "ShapedJson/shape-accessor.h"
// -----------------------------------------------------------------------------
// --SECTION-- INDEX
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// --SECTION-- public functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup VocBase
/// @{
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/// @brief removes an index file
////////////////////////////////////////////////////////////////////////////////
bool TRI_RemoveIndex (TRI_doc_collection_t* collection, TRI_index_t* idx) {
char* filename;
char* name;
char* number;
bool ok;
// construct filename
number = TRI_StringUInt64(idx->_iid);
if (!number) {
LOG_ERROR("out of memory when creating index number");
return false;
}
name = TRI_Concatenate3String("index-", number, ".json");
if (!name) {
TRI_FreeString(number);
LOG_ERROR("out of memory when creating index name");
return false;
}
filename = TRI_Concatenate2File(collection->base._directory, name);
if (!filename) {
TRI_FreeString(number);
TRI_FreeString(name);
LOG_ERROR("out of memory when creating index filename");
return false;
}
TRI_FreeString(name);
TRI_FreeString(number);
ok = TRI_UnlinkFile(filename);
TRI_FreeString(filename);
if (! ok) {
LOG_ERROR("cannot remove index definition: %s", TRI_last_error());
return false;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief saves an index
////////////////////////////////////////////////////////////////////////////////
bool TRI_SaveIndex (TRI_doc_collection_t* collection, TRI_index_t* idx) {
TRI_json_t* json;
char* filename;
char* name;
char* number;
bool ok;
// convert into JSON
json = idx->json(idx, collection);
if (json == NULL) {
LOG_TRACE("cannot save index definition: index cannot be jsonfied");
return false;
}
// construct filename
number = TRI_StringUInt64(idx->_iid);
if (!number) {
LOG_ERROR("out of memory when creating index number");
TRI_FreeJson(json);
return false;
}
name = TRI_Concatenate3String("index-", number, ".json");
if (!name) {
LOG_ERROR("out of memory when creating index name");
TRI_FreeJson(json);
TRI_FreeString(number);
return false;
}
filename = TRI_Concatenate2File(collection->base._directory, name);
if (!filename) {
LOG_ERROR("out of memory when creating index filename");
TRI_FreeJson(json);
TRI_FreeString(number);
TRI_FreeString(name);
return false;
}
TRI_FreeString(name);
TRI_FreeString(number);
// and save
ok = TRI_SaveJson(filename, json);
TRI_FreeString(filename);
TRI_FreeJson(json);
if (! ok) {
LOG_ERROR("cannot save index definition: %s", TRI_last_error());
return false;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief gets the definitions of all index files for a collection
////////////////////////////////////////////////////////////////////////////////
TRI_vector_pointer_t TRI_GetCollectionIndexes(const TRI_vocbase_t* vocbase,
const char* collectionName) {
TRI_vector_pointer_t indexes;
TRI_index_definition_t* indexDefinition;
TRI_vector_string_t indexFiles;
TRI_json_t* json;
TRI_json_t* strVal;
TRI_json_t* numVal;
char* error;
char* temp1;
char* temp2;
char* temp3;
TRI_idx_iid_t indexId;
TRI_idx_type_e indexType;
uint32_t numFields;
size_t i;
uint32_t j;
assert(vocbase);
TRI_InitVectorPointer(&indexes);
// add "pseudo" primary index
indexDefinition = (TRI_index_definition_t*) TRI_Allocate(sizeof(TRI_index_definition_t));
if (indexDefinition) {
TRI_InitVectorString(&indexDefinition->_fields);
indexDefinition->_iid = 1; // what to do with this id?
indexDefinition->_type = TRI_IDX_TYPE_PRIMARY_INDEX;
indexDefinition->_isUnique = true;
TRI_PushBackVectorString(&indexDefinition->_fields, "_id");
TRI_PushBackVectorPointer(&indexes, indexDefinition);
}
// get all index filenames
indexFiles = TRI_GetCollectionIndexFiles(vocbase, collectionName);
for (i = 0; i < indexFiles._length; ++i) {
// read JSON data from index file
json = TRI_JsonFile(indexFiles._buffer[i], &error);
if (!json) {
continue;
}
if (error) {
goto NEXT_INDEX;
}
if (json->_type != TRI_JSON_ARRAY) {
goto NEXT_INDEX;
}
// index file contains a JSON array. fine.
// read index id
indexId = 0;
numVal = TRI_LookupArrayJson(json, "iid");
if (!numVal || numVal->_type != TRI_JSON_NUMBER) {
goto NEXT_INDEX;
}
indexId = (uint64_t) numVal->_value._number;
if (indexId == 0) {
goto NEXT_INDEX;
}
// read index type
strVal = TRI_LookupArrayJson(json, "type");
if (!strVal || strVal->_type != TRI_JSON_STRING) {
goto NEXT_INDEX;
}
if (strcmp(strVal->_value._string.data, "hash") == 0) {
indexType = TRI_IDX_TYPE_HASH_INDEX;
}
else if (strcmp(strVal->_value._string.data, "geo") == 0) {
indexType = TRI_IDX_TYPE_GEO_INDEX;
}
else {
// unknown index type
goto NEXT_INDEX;
}
// read number of fields
numVal = TRI_LookupArrayJson(json, "field_count");
if (!numVal && numVal->_type != TRI_JSON_NUMBER) {
goto NEXT_INDEX;
}
numFields = (uint32_t) numVal->_value._number;
if (numFields == 0) {
goto NEXT_INDEX;
}
// create the index definition
indexDefinition = (TRI_index_definition_t*) TRI_Allocate(sizeof(TRI_index_definition_t));
if (indexDefinition) {
TRI_InitVectorString(&indexDefinition->_fields);
indexDefinition->_iid = indexId;
indexDefinition->_type = indexType;
indexDefinition->_isUnique = false; // currently hard-coded
// read field names
for (j = 0; j < numFields ; j++) {
temp1 = TRI_StringUInt32(j);
if (temp1) {
temp2 = TRI_Concatenate2String("field_", temp1);
if (temp2) {
strVal = TRI_LookupArrayJson(json, temp2);
if (strVal && strVal->_type == TRI_JSON_STRING) {
temp3 = TRI_DuplicateString(strVal->_value._string.data);
if (temp3) {
TRI_PushBackVectorString(&indexDefinition->_fields, temp3);
}
}
TRI_FreeString(temp2);
}
TRI_FreeString(temp1);
}
}
if (indexDefinition->_fields._length == 0) {
TRI_Free(indexDefinition);
}
else {
TRI_PushBackVectorPointer(&indexes, indexDefinition);
}
}
NEXT_INDEX:
TRI_FreeJson(json);
}
TRI_DestroyVectorString(&indexFiles);
return indexes;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief gets the names of all index files for a collection
////////////////////////////////////////////////////////////////////////////////
TRI_vector_string_t TRI_GetCollectionIndexFiles(const TRI_vocbase_t* vocbase,
const char* collectionName) {
TRI_vector_string_t files;
TRI_vector_string_t indexFiles;
char *path;
size_t i;
size_t n;
assert(vocbase);
TRI_InitVectorString(&indexFiles);
path = TRI_Concatenate2File(vocbase->_path, collectionName);
if (!path) {
return indexFiles;
}
files = TRI_FilesDirectory(path);
n = files._length;
for (i = 0; i < n; ++i) {
char* name;
char* file;
name = files._buffer[i];
if (name[0] == '\0' || strncmp(name, "index-", 6) != 0) {
continue;
}
file = TRI_Concatenate2File(path, name);
if (!file) {
continue;
}
if (TRI_IsDirectory(file)) {
continue;
}
TRI_PushBackVectorString(&indexFiles, file);
}
TRI_DestroyVectorString(&files);
TRI_FreeString(path);
return indexFiles;
}
////////////////////////////////////////////////////////////////////////////////
/// @}
////////////////////////////////////////////////////////////////////////////////
// -----------------------------------------------------------------------------
// --SECTION-- GEO INDEX
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// --SECTION-- private functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup VocBase
/// @{
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/// @brief extracts a double value from an array
////////////////////////////////////////////////////////////////////////////////
static bool ExtractDoubleArray (TRI_shaper_t* shaper,
TRI_shaped_json_t const* document,
TRI_shape_pid_t pid,
double* result) {
TRI_shape_access_t* acc;
TRI_shaped_json_t json;
TRI_shape_sid_t sid;
bool ok;
sid = document->_sid;
acc = TRI_ShapeAccessor(shaper, sid, pid);
if (acc == NULL || acc->_shape == NULL) {
return false;
}
if (acc->_shape->_sid != shaper->_sidNumber) {
return false;
}
ok = TRI_ExecuteShapeAccessor(acc, document, &json);
*result = * (double*) json._data.data;
return true;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief extracts a double value from a list
////////////////////////////////////////////////////////////////////////////////
static bool ExtractDoubleList (TRI_shaper_t* shaper,
TRI_shaped_json_t const* document,
TRI_shape_pid_t pid,
double* latitude,
double* longitude) {
TRI_shape_access_t* acc;
TRI_shaped_json_t list;
TRI_shaped_json_t entry;
TRI_shape_sid_t sid;
size_t len;
bool ok;
sid = document->_sid;
acc = TRI_ShapeAccessor(shaper, sid, pid);
if (acc == NULL || acc->_shape == NULL) {
return false;
}
// in-homogenous list
if (acc->_shape->_type == TRI_SHAPE_LIST) {
ok = TRI_ExecuteShapeAccessor(acc, document, &list);
len = TRI_LengthListShapedJson((TRI_list_shape_t*) acc->_shape, &list);
if (len < 2) {
return false;
}
// latitude
ok = TRI_AtListShapedJson((TRI_list_shape_t*) acc->_shape, &list, 0, &entry);
if (! ok || entry._sid != shaper->_sidNumber) {
return false;
}
*latitude = * (double*) entry._data.data;
// longitude
ok = TRI_AtListShapedJson((TRI_list_shape_t*) acc->_shape, &list, 1, &entry);
if (!ok || entry._sid != shaper->_sidNumber) {
return false;
}
*longitude = * (double*) entry._data.data;
return true;
}
// homogenous list
else if (acc->_shape->_type == TRI_SHAPE_HOMOGENEOUS_LIST) {
TRI_homogeneous_list_shape_t* hom;
hom = (TRI_homogeneous_list_shape_t*) acc->_shape;
if (hom->_sidEntry != shaper->_sidNumber) {
return false;
}
ok = TRI_ExecuteShapeAccessor(acc, document, &list);
if (! ok) {
return false;
}
len = TRI_LengthHomogeneousListShapedJson((TRI_homogeneous_list_shape_t*) acc->_shape, &list);
if (len < 2) {
return false;
}
// latitude
ok = TRI_AtHomogeneousListShapedJson((TRI_homogeneous_list_shape_t*) acc->_shape, &list, 0, &entry);
if (! ok) {
return false;
}
*latitude = * (double*) entry._data.data;
// longitude
ok = TRI_AtHomogeneousListShapedJson((TRI_homogeneous_list_shape_t*) acc->_shape, &list, 1, &entry);
if (! ok) {
return false;
}
*longitude = * (double*) entry._data.data;
return true;
}
// homogeneous list
else if (acc->_shape->_type == TRI_SHAPE_HOMOGENEOUS_SIZED_LIST) {
TRI_homogeneous_sized_list_shape_t* hom;
hom = (TRI_homogeneous_sized_list_shape_t*) acc->_shape;
if (hom->_sidEntry != shaper->_sidNumber) {
return false;
}
ok = TRI_ExecuteShapeAccessor(acc, document, &list);
if (! ok) {
return false;
}
len = TRI_LengthHomogeneousSizedListShapedJson((TRI_homogeneous_sized_list_shape_t*) acc->_shape, &list);
if (len < 2) {
return false;
}
// latitude
ok = TRI_AtHomogeneousSizedListShapedJson((TRI_homogeneous_sized_list_shape_t*) acc->_shape, &list, 0, &entry);
if (! ok) {
return false;
}
*latitude = * (double*) entry._data.data;
// longitude
ok = TRI_AtHomogeneousSizedListShapedJson((TRI_homogeneous_sized_list_shape_t*) acc->_shape, &list, 1, &entry);
if (! ok) {
return false;
}
*longitude = * (double*) entry._data.data;
return true;
}
// ups
return false;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief inserts a new document, location is a list
////////////////////////////////////////////////////////////////////////////////
static bool InsertGeoIndex (TRI_index_t* idx, TRI_doc_mptr_t const* doc) {
union { void* p; void const* c; } cnv;
GeoCoordinate gc;
TRI_shaper_t* shaper;
bool ok;
double latitude;
double longitude;
TRI_geo_index_t* geo;
int res;
geo = (TRI_geo_index_t*) idx;
shaper = geo->base._collection->_shaper;
// lookup latitude and longitude
if (geo->_location != 0) {
if (geo->_geoJson) {
ok = ExtractDoubleList(shaper, &doc->_document, geo->_location, &longitude, &latitude);
}
else {
ok = ExtractDoubleList(shaper, &doc->_document, geo->_location, &latitude, &longitude);
}
}
else {
ok = ExtractDoubleArray(shaper, &doc->_document, geo->_latitude, &latitude);
ok = ok && ExtractDoubleArray(shaper, &doc->_document, geo->_longitude, &longitude);
}
if (! ok) {
return false;
}
// and insert into index
gc.latitude = latitude;
gc.longitude = longitude;
cnv.c = doc;
gc.data = cnv.p;
res = GeoIndex_insert(geo->_geoIndex, &gc);
if (res == -1) {
LOG_WARNING("found duplicate entry in geo-index, should not happen");
}
else if (res == -2) {
LOG_WARNING("out-of-memory in geo-index");
}
else if (res == -3) {
LOG_DEBUG("illegal geo-coordinates, ignoring entry");
}
return res == 0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief updates a document, location is a list
////////////////////////////////////////////////////////////////////////////////
static bool UpdateGeoIndex (TRI_index_t* idx, TRI_doc_mptr_t const* doc, TRI_shaped_json_t const* old) {
union { void* p; void const* c; } cnv;
GeoCoordinate gc;
TRI_shaper_t* shaper;
bool ok;
double latitude;
double longitude;
TRI_geo_index_t* geo;
int res;
geo = (TRI_geo_index_t*) idx;
shaper = geo->base._collection->_shaper;
// lookup OLD latitude and longitude
if (geo->_location != 0) {
ok = ExtractDoubleList(shaper, old, geo->_location, &latitude, &longitude);
}
else {
ok = ExtractDoubleArray(shaper, old, geo->_latitude, &latitude);
ok = ok && ExtractDoubleArray(shaper, old, geo->_longitude, &longitude);
}
// and remove old entry
if (ok) {
gc.latitude = latitude;
gc.longitude = longitude;
cnv.c = doc;
gc.data = cnv.p;
res = GeoIndex_remove(geo->_geoIndex, &gc);
if (res != 0) {
LOG_WARNING("cannot remove old index entry: %d", res);
}
}
// create new entry with new coordinates
if (geo->_location != 0) {
ok = ExtractDoubleList(shaper, &doc->_document, geo->_location, &latitude, &longitude);
}
else {
ok = ExtractDoubleArray(shaper, &doc->_document, geo->_latitude, &latitude);
ok = ok && ExtractDoubleArray(shaper, &doc->_document, geo->_longitude, &longitude);
}
if (! ok) {
return false;
}
gc.latitude = latitude;
gc.longitude = longitude;
cnv.c = doc;
gc.data = cnv.p;
res = GeoIndex_insert(geo->_geoIndex, &gc);
if (res == -1) {
LOG_WARNING("found duplicate entry in geo-index, should not happen");
}
else if (res == -2) {
LOG_WARNING("out-of-memory in geo-index");
}
else if (res == -3) {
LOG_DEBUG("illegal geo-coordinates, ignoring entry");
}
return res == 0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief erases a document, location is a list
////////////////////////////////////////////////////////////////////////////////
static bool RemoveGeoIndex (TRI_index_t* idx, TRI_doc_mptr_t const* doc) {
union { void* p; void const* c; } cnv;
GeoCoordinate gc;
TRI_shaper_t* shaper;
bool ok;
double latitude;
double longitude;
TRI_geo_index_t* geo;
int res;
geo = (TRI_geo_index_t*) idx;
shaper = geo->base._collection->_shaper;
// lookup OLD latitude and longitude
if (geo->_location != 0) {
ok = ExtractDoubleList(shaper, &doc->_document, geo->_location, &latitude, &longitude);
}
else {
ok = ExtractDoubleArray(shaper, &doc->_document, geo->_latitude, &latitude);
ok = ok && ExtractDoubleArray(shaper, &doc->_document, geo->_longitude, &longitude);
}
// and remove old entry
if (ok) {
gc.latitude = latitude;
gc.longitude = longitude;
cnv.c = doc;
gc.data = cnv.p;
res = GeoIndex_remove(geo->_geoIndex, &gc);
if (res != 0) {
LOG_WARNING("cannot remove old index entry: %d", res);
}
return res == 0;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief JSON description of a geo index, location is a list
////////////////////////////////////////////////////////////////////////////////
static TRI_json_t* JsonGeoIndex (TRI_index_t* idx, TRI_doc_collection_t* collection) {
TRI_json_t* json;
TRI_shape_path_t const* path;
char const* location;
TRI_geo_index_t* geo;
geo = (TRI_geo_index_t*) idx;
// convert location to string
path = collection->_shaper->lookupAttributePathByPid(collection->_shaper, geo->_location);
if (path == 0) {
return NULL;
}
location = ((char const*) path) + sizeof(TRI_shape_path_t) + (path->_aidLength * sizeof(TRI_shape_aid_t));
// create json
json = TRI_CreateArrayJson();
TRI_Insert2ArrayJson(json, "iid", TRI_CreateNumberJson(idx->_iid));
TRI_Insert2ArrayJson(json, "type", TRI_CreateStringCopyJson("geo"));
TRI_Insert2ArrayJson(json, "location", TRI_CreateStringCopyJson(location));
return json;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief saves the index to file, location is an array
////////////////////////////////////////////////////////////////////////////////
static TRI_json_t* JsonGeoIndex2 (TRI_index_t* idx, TRI_doc_collection_t* collection) {
TRI_json_t* json;
TRI_shape_path_t const* path;
char const* latitude;
char const* longitude;
TRI_geo_index_t* geo;
geo = (TRI_geo_index_t*) idx;
// convert latitude to string
path = collection->_shaper->lookupAttributePathByPid(collection->_shaper, geo->_latitude);
if (path == 0) {
return NULL;
}
latitude = ((char const*) path) + sizeof(TRI_shape_path_t) + path->_aidLength * sizeof(TRI_shape_aid_t);
// convert longitude to string
path = collection->_shaper->lookupAttributePathByPid(collection->_shaper, geo->_longitude);
if (path == 0) {
return NULL;
}
longitude = ((char const*) path) + sizeof(TRI_shape_path_t) + path->_aidLength * sizeof(TRI_shape_aid_t);
// create json
json = TRI_CreateArrayJson();
TRI_Insert2ArrayJson(json, "iid", TRI_CreateNumberJson(idx->_iid));
TRI_Insert2ArrayJson(json, "type", TRI_CreateStringCopyJson("geo"));
TRI_Insert2ArrayJson(json, "latitude", TRI_CreateStringCopyJson(latitude));
TRI_Insert2ArrayJson(json, "longitude", TRI_CreateStringCopyJson(longitude));
return json;
}
////////////////////////////////////////////////////////////////////////////////
/// @}
////////////////////////////////////////////////////////////////////////////////
// -----------------------------------------------------------------------------
// --SECTION-- constructors and destructors
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup VocBase
/// @{
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/// @brief creates a geo-index for lists
////////////////////////////////////////////////////////////////////////////////
TRI_index_t* TRI_CreateGeoIndex (struct TRI_doc_collection_s* collection,
TRI_shape_pid_t location,
bool geoJson) {
TRI_geo_index_t* geo;
geo = TRI_Allocate(sizeof(TRI_geo_index_t));
if (!geo) {
return NULL;
}
geo->base._iid = TRI_NewTickVocBase();
geo->base._type = TRI_IDX_TYPE_GEO_INDEX;
geo->base._collection = collection;
geo->base.insert = InsertGeoIndex;
geo->base.remove = RemoveGeoIndex;
geo->base.update = UpdateGeoIndex;
geo->base.json = JsonGeoIndex;
geo->_geoIndex = GeoIndex_new();
geo->_location = location;
geo->_latitude = 0;
geo->_longitude = 0;
geo->_geoJson = geoJson;
return &geo->base;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief creates a geo-index for arrays
////////////////////////////////////////////////////////////////////////////////
TRI_index_t* TRI_CreateGeoIndex2 (struct TRI_doc_collection_s* collection,
TRI_shape_pid_t latitude,
TRI_shape_pid_t longitude) {
TRI_geo_index_t* geo;
geo = TRI_Allocate(sizeof(TRI_geo_index_t));
if (!geo) {
return NULL;
}
geo->base._iid = TRI_NewTickVocBase();
geo->base._type = TRI_IDX_TYPE_GEO_INDEX;
geo->base._collection = collection;
geo->base.insert = InsertGeoIndex;
geo->base.remove = RemoveGeoIndex;
geo->base.update = UpdateGeoIndex;
geo->base.json = JsonGeoIndex2;
geo->_geoIndex = GeoIndex_new();
geo->_location = 0;
geo->_latitude = latitude;
geo->_longitude = longitude;
return &geo->base;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief frees the memory allocated, but does not free the pointer
////////////////////////////////////////////////////////////////////////////////
void TRI_DestroyGeoIndex (TRI_index_t* idx) {
TRI_geo_index_t* geo;
geo = (TRI_geo_index_t*) idx;
GeoIndex_free(geo->_geoIndex);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief frees the memory allocated and frees the pointer
////////////////////////////////////////////////////////////////////////////////
void TRI_FreeGeoIndex (TRI_index_t* idx) {
TRI_DestroyGeoIndex(idx);
TRI_Free(idx);
}
////////////////////////////////////////////////////////////////////////////////
/// @}
////////////////////////////////////////////////////////////////////////////////
// -----------------------------------------------------------------------------
// --SECTION-- public functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup VocBase
/// @{
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/// @brief looks up all points within a given radius
////////////////////////////////////////////////////////////////////////////////
GeoCoordinates* TRI_WithinGeoIndex (TRI_index_t* idx,
double lat,
double lon,
double radius) {
TRI_geo_index_t* geo;
GeoCoordinate gc;
geo = (TRI_geo_index_t*) idx;
gc.latitude = lat;
gc.longitude = lon;
return GeoIndex_PointsWithinRadius(geo->_geoIndex, &gc, radius);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief looks up the nearest points
////////////////////////////////////////////////////////////////////////////////
GeoCoordinates* TRI_NearestGeoIndex (TRI_index_t* idx,
double lat,
double lon,
size_t count) {
TRI_geo_index_t* geo;
GeoCoordinate gc;
geo = (TRI_geo_index_t*) idx;
gc.latitude = lat;
gc.longitude = lon;
return GeoIndex_NearestCountPoints(geo->_geoIndex, &gc, count);
}
////////////////////////////////////////////////////////////////////////////////
/// @}
////////////////////////////////////////////////////////////////////////////////
// -----------------------------------------------------------------------------
// --SECTION-- GEO INDEX
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// --SECTION-- private functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup VocBase
/// @{
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/// @brief attempts to locate an entry in the hash index
////////////////////////////////////////////////////////////////////////////////
HashIndexElements* TRI_LookupHashIndex(TRI_index_t* idx, TRI_json_t* parameterList) {
TRI_hash_index_t* hashIndex;
HashIndexElements* result;
HashIndexElement element;
element.numFields = parameterList->_value._objects._length;
element.fields = TRI_Allocate( sizeof(TRI_json_t) * element.numFields);
if (element.fields == NULL) {
LOG_WARNING("out-of-memory in InsertHashIndex");
return false;
}
for (size_t j = 0; j < element.numFields; ++j) {
TRI_json_t* object = (TRI_json_t*) (TRI_AtVector(&(parameterList->_value._objects),j));
element.fields[j] = *object;
}
hashIndex = (TRI_hash_index_t*) idx;
result = HashIndex_find(hashIndex->_hashIndex, &element);
TRI_Free(element.fields);
return result;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief hash indexes a document
////////////////////////////////////////////////////////////////////////////////
static bool InsertHashIndex (TRI_index_t* idx, TRI_doc_mptr_t const* doc) {
union { void* p; void const* c; } cnv;
HashIndexElement* hashElement;
TRI_shaper_t* shaper;
TRI_hash_index_t* hashIndex;
int res;
TRI_shape_sid_t sid;
TRI_shape_access_t* acc;
// ............................................................................
// Obtain the hash index structure
// ............................................................................
hashIndex = (TRI_hash_index_t*) idx;
if (idx == NULL) {
LOG_WARNING("internal error in InsertHashIndex");
return false;
}
// ............................................................................
// Prepare document so that it can be stored as part of the hash index
// ............................................................................
hashElement = (HashIndexElement*)(TRI_Allocate( sizeof(HashIndexElement) ));
if (hashElement == NULL) {
LOG_WARNING("out-of-memory in InsertHashIndex");
return false;
}
cnv.c = doc;
hashElement->data = cnv.p;
// ............................................................................
// Obtain the shaper structure for the collection
// ............................................................................
shaper = hashIndex->base._collection->_shaper;
// ............................................................................
// For each attribute obtain the data blob which forms part of the index
// ............................................................................
sid = doc->_document._sid;
hashElement->numFields = hashIndex->_shapeList->_length;
hashElement->fields = TRI_Allocate( sizeof(TRI_json_t) * hashElement->numFields);
if (hashElement->fields == NULL) {
LOG_WARNING("out-of-memory in InsertHashIndex");
return false;
}
for (size_t j = 0; j < hashIndex->_shapeList->_length; ++j) {
TRI_json_t* object;
TRI_shaped_json_t shapedObject;
TRI_shape_pid_t shape = *((TRI_shape_pid_t*)(TRI_AtVector(hashIndex->_shapeList,j)));
// ..........................................................................
// Determine if document has that particular shape
// ..........................................................................
acc = TRI_ShapeAccessor(shaper, sid, shape);
if (acc == NULL || acc->_shape == NULL) {
TRI_Free(hashElement->fields);
return false;
}
// ..........................................................................
// Extract the field
// ..........................................................................
if (! TRI_ExecuteShapeAccessor(acc, &(doc->_document), &shapedObject)) {
TRI_Free(hashElement->fields);
return false;
}
// ..........................................................................
// Store the field
// ..........................................................................
else {
object = TRI_JsonShapedJson(shaper, &shapedObject);
hashElement->fields[j] = *object;
TRI_Free(object);
object = NULL;
}
/* oreste remove debug stuff
if (hashElement->fields[j]._type == TRI_JSON_NUMBER) {
printf("%s:%u:number=%f\n",__FILE__,__LINE__,hashElement->fields[j]._value._number);
}
else if (hashElement->fields[j]._type == TRI_JSON_STRING) {
printf("%s:%u:string length=%u:%s\n",__FILE__,__LINE__,hashElement->fields[j]._value._string.length,hashElement->fields[j]._value._string.data);
}
else if (false) {
}
*/
}
res = HashIndex_insert(hashIndex->_hashIndex, hashElement);
if (res == -1) {
LOG_WARNING("found duplicate entry in hash-index, should not happen");
}
else if (res == -2) {
LOG_WARNING("out-of-memory in hash-index");
}
else if (res == -99) {
LOG_DEBUG("unknown error, ignoring entry");
}
return res == 0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief describes a hash index as a json object
////////////////////////////////////////////////////////////////////////////////
static TRI_json_t* JsonHashIndex (TRI_index_t* idx, TRI_doc_collection_t* collection) {
TRI_json_t* json;
const TRI_shape_path_t* path;
TRI_hash_index_t* hashIndex;
char const** fieldList;
char* fieldCounter;
// ..........................................................................
// Recast as a hash index
// ..........................................................................
hashIndex = (TRI_hash_index_t*) idx;
if (hashIndex == NULL) {
return NULL;
}
// ..........................................................................
// Allocate sufficent memory for the field list
// ..........................................................................
fieldList = TRI_Allocate( (sizeof(char*) * hashIndex->_shapeList->_length) );
if (fieldList == NULL) {
return NULL;
}
// ..........................................................................
// Convert the attributes (field list of the hash index) into strings
// ..........................................................................
for (size_t j = 0; j < hashIndex->_shapeList->_length; ++j) {
TRI_shape_pid_t shape = *((TRI_shape_pid_t*)(TRI_AtVector(hashIndex->_shapeList,j)));
path = collection->_shaper->lookupAttributePathByPid(collection->_shaper, shape);
if (path == NULL) {
TRI_Free(fieldList);
return NULL;
}
fieldList[j] = ((const char*) path) + sizeof(TRI_shape_path_t) + path->_aidLength * sizeof(TRI_shape_aid_t);
}
// ..........................................................................
// create json object and fill it
// ..........................................................................
json = TRI_CreateArrayJson();
if (!json) {
TRI_Free(fieldList);
return NULL;
}
fieldCounter = TRI_Allocate(30);
if (!fieldCounter) {
TRI_Free(fieldList);
TRI_FreeJson(json);
return NULL;
}
TRI_Insert2ArrayJson(json, "iid", TRI_CreateNumberJson(idx->_iid));
TRI_Insert2ArrayJson(json, "type", TRI_CreateStringCopyJson("hash"));
TRI_Insert2ArrayJson(json, "field_count", TRI_CreateNumberJson(hashIndex->_shapeList->_length));
for (size_t j = 0; j < hashIndex->_shapeList->_length; ++j) {
sprintf(fieldCounter,"field_%lu",j);
TRI_Insert2ArrayJson(json, fieldCounter, TRI_CreateStringCopyJson(fieldList[j]));
}
TRI_Free(fieldList);
TRI_Free(fieldCounter);
return json;
}
static bool RemoveHashIndex (TRI_index_t* idx, TRI_doc_mptr_t const* doc) {
return false;
}
static bool UpdateHashIndex (TRI_index_t* idx, TRI_doc_mptr_t const* doc, TRI_shaped_json_t const* old) {
return false;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief creates a hash index
////////////////////////////////////////////////////////////////////////////////
TRI_index_t* TRI_CreateHashIndex (struct TRI_doc_collection_s* collection,
TRI_vector_t* shapeList) {
TRI_hash_index_t* hashIndex;
hashIndex = TRI_Allocate(sizeof(TRI_hash_index_t));
if (!hashIndex) {
return NULL;
}
hashIndex->base._iid = TRI_NewTickVocBase();
hashIndex->base._type = TRI_IDX_TYPE_HASH_INDEX;
hashIndex->base._collection = collection;
hashIndex->base.insert = InsertHashIndex;
hashIndex->base.json = JsonHashIndex;
hashIndex->base.remove = RemoveHashIndex;
hashIndex->base.update = UpdateHashIndex;
// ...........................................................................
// Copy the contents of the shape list vector into a new vector and store this
// ...........................................................................
hashIndex->_shapeList = TRI_Allocate(sizeof(TRI_vector_t));
if (!hashIndex->_shapeList) {
TRI_Free(hashIndex);
return NULL;
}
TRI_InitVector(hashIndex->_shapeList, sizeof(TRI_shape_pid_t));
for (size_t j = 0; j < shapeList->_length; ++j) {
TRI_shape_pid_t shape = *((TRI_shape_pid_t*)(TRI_AtVector(shapeList,j)));
TRI_PushBackVector(hashIndex->_shapeList,&shape);
}
hashIndex->_hashIndex = HashIndex_new();
return &hashIndex->base;
}
////////////////////////////////////////////////////////////////////////////////
/// @}
////////////////////////////////////////////////////////////////////////////////
// Local Variables:
// mode: outline-minor
// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
// End:
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