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More compact search patch parsing

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This commit is contained in:
Kae 2024-03-09 09:48:21 +11:00
parent 7bc9eaa432
commit 7b556b33f8
3 changed files with 90 additions and 170 deletions
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6
source/core/StarJson.cpp
View File

@ -1035,13 +1035,13 @@ Json jsonMerge(Json const& base, Json const& merger) {
}
}
bool jsonCompare(Json const& base, Json const& compare) {
bool jsonPartialMatch(Json const& base, Json const& compare) {
if (base == compare) {
return true;
} else {
if (base.type() == Json::Type::Object && compare.type() == Json::Type::Object) {
for (auto const& c : compare.toObject()) {
if (!base.contains(c.first) || !jsonCompare(base.get(c.first), c.second))
if (!base.contains(c.first) || !jsonPartialMatch(base.get(c.first), c.second))
return false;
}
return true;
@ -1050,7 +1050,7 @@ bool jsonCompare(Json const& base, Json const& compare) {
for (auto const& c : compare.toArray()) {
bool similar = false;
for (auto const& b : base.toArray()) {
if (jsonCompare(c, b)) {
if (jsonPartialMatch(c, b)) {
similar = true;
break;
}

22
source/core/StarJson.hpp
View File

@ -355,21 +355,13 @@ Json jsonMergeQueryDef(String const& key, Json def, Json const& first, T const&.
return def;
}
// Compares the two given json values and returns a boolean, by the following
// rules (applied in order): If both values are identical, return true. If both
// values are not equal, check if they are objects. If they are objects,
// iterate through every pair in the comparing object and check if the key is
// in the base object. If the key is in the base object, then jsonCompare is
// called recursively on both values. If the base object does not contain the
// key, or the recursion fails, return false. Otherwise, return true. If they
// are not objects, check if they are arrays. If they are arrays, iterate
// through every value in the comparing object and then recursively call
// jsonCompare on every value in the base object until a match is found. If a
// match is found, break and move on to the next value in the comparing array.
// If a match is found for every value in the comparing array, return true.
// Otherwise, return false. If both values are not identical, and are not
// objects or arrays, return false.
bool jsonCompare(Json const& base, Json const& compare);
// Compares two JSON values to see if the second is a subset of the first.
// For objects, each key in the second object must exist in the first
// object and the values are recursively compared the same way. For arrays,
// each element in the second array must successfully compare with some
// element of the first array, regardless of order or duplication.
// For all other types, the values must be equal.
bool jsonPartialMatch(Json const& base, Json const& compare);
}

232
source/core/StarJsonPatch.cpp
View File

@ -16,6 +16,22 @@ Json jsonPatch(Json const& base, JsonArray const& patch) {
}
}
// Returns 0 if not found, index + 1 if found.
size_t findJsonMatch(Json const& searchable, Json const& value, JsonPath::Pointer& pointer) {
if (searchable.isType(Json::Type::Array)) {
auto array = searchable.toArray();
for (size_t i = 0; i != array.size(); ++i) {
if (jsonPartialMatch(array[i], value))
return i + 1;
}
} else {
throw JsonPatchException(strf("Search operation failure, value at '{}' is not an array.", pointer.path()));
}
return 0;
}
namespace JsonPatching {
static const StringMap<std::function<Json(Json, Json)>> functionMap = StringMap<std::function<Json(Json, Json)>>{
@ -40,49 +56,33 @@ namespace JsonPatching {
}
Json applyTestOperation(Json const& base, Json const& op) {
auto path = op.getString("path");
auto inverseTest = op.getBool("inverse", false);
String path = op.getString("path");
auto pointer = JsonPath::Pointer(path);
auto inverseTest = op.getBool("inverse", false);
try {
if (op.contains("search")) {
Json searchArray = pointer.get(base);
Json searchValue = op.get("search");
if (searchArray.type() == Json::Type::Array) {
bool found = false;
for(auto& v : searchArray.toArray()) {
if (jsonCompare(v, searchValue)) {
found = true;
break;
}
}
if (found) {
if (inverseTest)
throw JsonPatchTestFail(strf("Test operation failure, expected {} to be missing.", searchValue));
return base;
} else {
if (!inverseTest)
throw JsonPatchTestFail(strf("Test operation failure, could not find {}.", searchValue));
return base;
}
} else {
throw JsonPatchException(strf("Search operation failure, value at '{}' is not an array.", path));
}
auto searchable = pointer.get(base);
auto searchValue = op.get("search");
bool found = findJsonMatch(searchable, searchValue, pointer);
if (found && inverseTest)
throw JsonPatchTestFail(strf("Test operation failure, expected {} to be missing.", searchValue));
else if (!found && !inverseTest)
throw JsonPatchTestFail(strf("Test operation failure, could not find {}.", searchValue));
return base;
} else {
auto value = op.opt("value");
auto testValue = pointer.get(base);
if (!value) {
if (inverseTest)
throw JsonPatchTestFail(strf("Test operation failure, expected {} to be missing.", op.getString("path")));
throw JsonPatchTestFail(strf("Test operation failure, expected {} to be missing.", path));
return base;
}
if ((value && (testValue == *value)) ^ inverseTest) {
if ((value && (testValue == *value)) ^ inverseTest)
return base;
}
throw JsonPatchTestFail(strf("Test operation failure, expected {} found {}.", value, testValue));
else
throw JsonPatchTestFail(strf("Test operation failure, expected {} found {}.", value, testValue));
}
} catch (JsonPath::TraversalException& e) {
if (inverseTest)
@ -92,84 +92,52 @@ namespace JsonPatching {
}
Json applyRemoveOperation(Json const& base, Json const& op) {
String path = op.getString("path");
auto pointer = JsonPath::Pointer(path);
if (op.contains("search")) {
String path = op.getString("path");
auto pointer = JsonPath::Pointer(path);
Json searchArray = pointer.get(base);
Json searchValue = op.get("search");
if (searchArray.type() == Json::Type::Array) {
size_t index = 0;
bool found = false;
for (auto& v : searchArray.toArray()) {
if (jsonCompare(v, searchValue)) {
found = true;
break;
}
index++;
}
if (found)
searchArray = searchArray.eraseIndex(index);
return pointer.add(pointer.remove(base), searchArray);
} else {
throw JsonPatchException(strf("Search operation failure, value at {} is not an array.", path));
}
auto searchable = pointer.get(base);
auto searchValue = op.get("search");
if (size_t index = findJsonMatch(searchable, searchValue, pointer))
return pointer.add(pointer.remove(base), searchable.eraseIndex(index - 1));
else
return base;
} else {
return JsonPath::Pointer(op.getString("path")).remove(base);
return pointer.remove(base);
}
}
Json applyAddOperation(Json const& base, Json const& op) {
String path = op.getString("path");
auto value = op.get("value");
auto pointer = JsonPath::Pointer(path);
if (op.contains("search")) {
Json value = op.get("value");
String path = op.getString("path");
auto pointer = JsonPath::Pointer(path);
Json searchArray = pointer.get(base);
Json searchValue = op.get("search");
if (searchArray.type() == Json::Type::Array) {
bool found = false;
for (auto& v : searchArray.toArray()) {
if (jsonCompare(v, searchValue)) {
found = true;
break;
}
}
if (found)
searchArray = searchArray.append(value);
return pointer.add(pointer.remove(base), searchArray);
} else {
throw JsonPatchException(strf("Search operation failure, value at {} is not an array.", path));
}
auto searchable = pointer.get(base);
auto searchValue = op.get("search");
if (size_t index = findJsonMatch(searchable, searchValue, pointer))
return pointer.add(pointer.remove(base), searchable.insert(index - 1, value));
else
return base;
} else {
return JsonPath::Pointer(op.getString("path")).add(base, op.get("value"));
return pointer.add(base, value);
}
}
Json applyReplaceOperation(Json const& base, Json const& op) {
String path = op.getString("path");
auto value = op.get("value");
auto pointer = JsonPath::Pointer(op.getString("path"));
if (op.contains("search")) {
Json value = op.get("value");
Json searchArray = pointer.get(base);
Json searchValue = op.get("search");
if (searchArray.type() == Json::Type::Array) {
size_t index = 0;
bool found = false;
for (auto& v : searchArray.toArray()) {
if (jsonCompare(v, searchValue)) {
found = true;
break;
}
index++;
}
if (found)
searchArray = searchArray.set(index, value);
return pointer.add(pointer.remove(base), searchArray);
} else {
throw JsonPatchException(strf("Search operation failure, value at {} is not an array.", path));
}
auto searchable = pointer.get(base);
auto searchValue = op.get("search");
if (size_t index = findJsonMatch(searchable, searchValue, pointer))
return pointer.add(pointer.remove(base), searchable.set(index - 1, value));
else
return base;
} else {
return pointer.add(pointer.remove(base), op.get("value"));
return pointer.add(pointer.remove(base), value);
}
}
@ -179,28 +147,14 @@ namespace JsonPatching {
auto fromPointer = JsonPath::Pointer(op.getString("from"));
if (op.contains("search")) {
Json value = op.get("value");
Json searchArray = fromPointer.get(base);
Json searchValue = op.get("search");
if (searchArray.type() == Json::Type::Array) {
size_t index = 0;
bool found = false;
for (auto& v : searchArray.toArray()) {
if (jsonCompare(v, searchValue)) {
found = true;
break;
}
index++;
}
if (found) {
toPointer.add(toPointer.remove(base), searchArray.get(index));
searchArray = searchArray.eraseIndex(index);
fromPointer.add(fromPointer.remove(base), searchArray);
}
return toPointer.get(base);
} else {
throw JsonPatchException(strf("Search operation failure, value at {} is not an array.", path));
auto searchable = fromPointer.get(base);
auto searchValue = op.get("search");
if (size_t index = findJsonMatch(searchable, searchValue, fromPointer)) {
auto result = toPointer.add(base, searchable.get(index - 1));
return fromPointer.add(result, searchable.eraseIndex(index - 1));
}
else
return base;
} else {
Json value = fromPointer.get(base);
return toPointer.add(fromPointer.remove(base), value);
@ -213,55 +167,29 @@ namespace JsonPatching {
auto fromPointer = JsonPath::Pointer(op.getString("from"));
if (op.contains("search")) {
Json value = op.get("value");
Json searchArray = fromPointer.get(base);
Json searchValue = op.get("search");
if (searchArray.type() == Json::Type::Array) {
size_t index = 0;
bool found = false;
for (auto& v : searchArray.toArray()) {
if (jsonCompare(v, searchValue)) {
found = true;
break;
}
index++;
}
if (found)
toPointer.add(base, searchArray.get(index));
return toPointer.get(base);
} else {
throw JsonPatchException(strf("Search operation failure, value at {} is not an array.", path));
}
auto searchable = fromPointer.get(base);
auto searchValue = op.get("search");
if (size_t index = findJsonMatch(searchable, searchValue, fromPointer))
return toPointer.add(base, searchable.get(index - 1));
else
return base;
} else {
Json value = fromPointer.get(base);
return toPointer.add(base, fromPointer.get(base));
return toPointer.add(base, value);
}
}
Json applyMergeOperation(Json const& base, Json const& op) {
String path = op.getString("path");
auto pointer = JsonPath::Pointer(op.getString("path"));
auto pointer = JsonPath::Pointer(path);
if (op.contains("search")) {
Json value = op.get("value");
Json searchArray = pointer.get(base);
Json searchValue = op.get("search");
if (searchArray.type() == Json::Type::Array) {
size_t index = 0;
bool found = false;
for (auto& v : searchArray.toArray()) {
if (jsonCompare(v, searchValue)) {
found = true;
break;
}
index++;
}
if (found)
searchArray = searchArray.set(index, jsonMerge(searchArray.get(index), op.get("value")));
return pointer.add(pointer.remove(base), searchArray);
} else {
throw JsonPatchException(strf("Search operation failure, value at {} is not an array.", path));
}
auto searchable = pointer.get(base);
auto searchValue = op.get("search");
if (size_t index = findJsonMatch(searchable, searchValue, pointer))
return pointer.add(pointer.remove(base), searchable.set(index - 1, jsonMerge(searchable.get(index - 1), op.get("value"))));
else
return base;
} else {
return pointer.add(pointer.remove(base), jsonMerge(pointer.get(base), op.get("value")));
}