mirror of https://gitee.com/bigwinds/arangodb
568 lines
20 KiB
C++
568 lines
20 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Michael Hackstein
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////////////////////////////////////////////////////////////////////////////////
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#include "ExampleMatcher.h"
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#include "Basics/JsonHelper.h"
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#include "Basics/StringUtils.h"
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#include "Utils/V8ResolverGuard.h"
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#include "V8/v8-utils.h"
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#include "V8/v8-conv.h"
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#include "V8Server/v8-shape-conv.h"
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#include "V8Server/v8-vocbaseprivate.h"
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#include "VocBase/VocShaper.h"
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#include <velocypack/Iterator.h>
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#include <velocypack/velocypack-aliases.h>
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using namespace arangodb;
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using namespace arangodb::basics;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief cleans up shaped json values
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////////////////////////////////////////////////////////////////////////////////
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static void CleanupShapes(std::vector<TRI_shaped_json_t*>& values) {
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for (auto& it : values) {
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if (it != nullptr) {
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TRI_FreeShapedJson(TRI_UNKNOWN_MEM_ZONE, it);
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}
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}
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values.clear();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief cleans up the example object
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////////////////////////////////////////////////////////////////////////////////
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void ExampleMatcher::cleanup() {
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// clean shaped json objects
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for (auto& def : definitions) {
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CleanupShapes(def._values);
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}
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definitions.clear();
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}
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void ExampleMatcher::fillExampleDefinition(
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v8::Isolate* isolate, v8::Handle<v8::Object> const& example,
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v8::Handle<v8::Array> const& names, size_t& n, std::string& errorMessage,
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ExampleDefinition& def) {
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TRI_IF_FAILURE("ExampleNoContextVocbase") {
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// intentionally fail
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THROW_ARANGO_EXCEPTION(TRI_ERROR_ARANGO_DATABASE_NOT_FOUND);
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}
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TRI_vocbase_t* vocbase = GetContextVocBase(isolate);
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if (vocbase == nullptr) {
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// This should never be thrown as we are already in a transaction
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THROW_ARANGO_EXCEPTION(TRI_ERROR_ARANGO_DATABASE_NOT_FOUND);
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}
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def._pids.reserve(n);
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def._values.reserve(n);
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for (size_t i = 0; i < n; ++i) {
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v8::Handle<v8::Value> key = names->Get((uint32_t)i);
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v8::Handle<v8::Value> val = example->Get(key);
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TRI_Utf8ValueNFC keyStr(TRI_UNKNOWN_MEM_ZONE, key);
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if (*keyStr != nullptr) {
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auto pid = _shaper->lookupAttributePathByName(*keyStr);
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if (pid == 0) {
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// Internal attributes do have pid == 0.
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char const* p = *keyStr;
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if (*p == '_') {
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std::string const key(p, keyStr.length());
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std::string keyVal = TRI_ObjectToString(val);
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if (TRI_VOC_ATTRIBUTE_KEY == key) {
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def._internal.insert(
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std::make_pair(internalAttr::key, DocumentId(0, keyVal)));
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} else if (TRI_VOC_ATTRIBUTE_REV == key) {
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def._internal.insert(
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std::make_pair(internalAttr::rev, DocumentId(0, keyVal)));
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} else {
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// We need a Collection Name Resolver here now!
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V8ResolverGuard resolverGuard(vocbase);
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CollectionNameResolver const* resolver =
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resolverGuard.getResolver();
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std::string colName = keyVal.substr(0, keyVal.find("/"));
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keyVal = keyVal.substr(keyVal.find("/") + 1, keyVal.length());
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if (TRI_VOC_ATTRIBUTE_ID == key) {
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def._internal.insert(std::make_pair(
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internalAttr::id,
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DocumentId(resolver->getCollectionId(colName), keyVal)));
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} else if (TRI_VOC_ATTRIBUTE_FROM == key) {
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def._internal.insert(std::make_pair(
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internalAttr::from,
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DocumentId(resolver->getCollectionId(colName), keyVal)));
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} else if (TRI_VOC_ATTRIBUTE_TO == key) {
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def._internal.insert(std::make_pair(
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internalAttr::to,
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DocumentId(resolver->getCollectionId(colName), keyVal)));
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} else {
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// no attribute path found. this means the result will be empty
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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}
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} else {
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// no attribute path found. this means the result will be empty
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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} else {
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def._pids.push_back(pid);
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std::unique_ptr<TRI_shaped_json_t> value(
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TRI_ShapedJsonV8Object(isolate, val, _shaper, false));
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if (value.get() == nullptr) {
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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def._values.push_back(value.get());
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value.release();
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}
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} else {
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errorMessage = "cannot convert attribute path to UTF8";
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THROW_ARANGO_EXCEPTION(TRI_ERROR_BAD_PARAMETER);
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}
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}
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}
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void ExampleMatcher::fillExampleDefinition(
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TRI_json_t const* example, CollectionNameResolver const* resolver,
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ExampleDefinition& def) {
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if (TRI_IsStringJson(example)) {
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// Example is an _id value
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char const* _key = strchr(example->_value._string.data, '/');
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if (_key != nullptr) {
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_key += 1;
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def._internal.insert(
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std::make_pair(internalAttr::key, DocumentId(0, _key)));
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return;
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}
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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TRI_vector_t objects = example->_value._objects;
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// Trolololol std::vector in C... ;(
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size_t n = TRI_LengthVector(&objects);
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def._pids.reserve(n);
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def._values.reserve(n);
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try {
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for (size_t i = 0; i < n; i += 2) {
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auto keyObj = static_cast<TRI_json_t const*>(TRI_AtVector(&objects, i));
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TRI_ASSERT(TRI_IsStringJson(keyObj));
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char const* keyStr = keyObj->_value._string.data;
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auto pid = _shaper->lookupAttributePathByName(keyStr);
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if (pid == 0) {
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// Internal attributes do have pid == 0.
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if (*keyStr == '_') {
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std::string const key(keyStr, keyObj->_value._string.length - 1);
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auto jsonValue =
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static_cast<TRI_json_t const*>(TRI_AtVector(&objects, i + 1));
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if (!TRI_IsStringJson(jsonValue)) {
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THROW_ARANGO_EXCEPTION(TRI_ERROR_TYPE_ERROR);
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}
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std::string keyVal(jsonValue->_value._string.data);
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if (TRI_VOC_ATTRIBUTE_KEY == key) {
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def._internal.insert(
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std::make_pair(internalAttr::key, DocumentId(0, keyVal)));
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} else if (TRI_VOC_ATTRIBUTE_REV == key) {
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def._internal.insert(
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std::make_pair(internalAttr::rev, DocumentId(0, keyVal)));
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} else {
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std::string colName = keyVal.substr(0, keyVal.find("/"));
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keyVal = keyVal.substr(keyVal.find("/") + 1, keyVal.length());
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if (TRI_VOC_ATTRIBUTE_ID == key) {
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def._internal.insert(std::make_pair(
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internalAttr::id,
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DocumentId(resolver->getCollectionId(colName), keyVal)));
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} else if (TRI_VOC_ATTRIBUTE_FROM == key) {
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def._internal.insert(std::make_pair(
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internalAttr::from,
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DocumentId(resolver->getCollectionId(colName), keyVal)));
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} else if (TRI_VOC_ATTRIBUTE_TO == key) {
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def._internal.insert(std::make_pair(
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internalAttr::to,
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DocumentId(resolver->getCollectionId(colName), keyVal)));
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} else {
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// no attribute path found. this means the result will be empty
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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}
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} else {
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// no attribute path found. this means the result will be empty
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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} else {
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def._pids.push_back(pid);
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auto jsonValue =
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static_cast<TRI_json_t const*>(TRI_AtVector(&objects, i + 1));
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auto value = TRI_ShapedJsonJson(_shaper, jsonValue, false);
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if (value == nullptr) {
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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def._values.push_back(value);
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}
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}
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} catch (std::bad_alloc const&) {
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ExampleMatcher::cleanup();
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throw;
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}
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}
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void ExampleMatcher::fillExampleDefinition(
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VPackSlice const& example, CollectionNameResolver const* resolver,
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ExampleDefinition& def) {
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if (example.isString()) {
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// Example is an _id value
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std::string tmp = example.copyString();
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char const* _key = strchr(tmp.c_str(), '/');
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if (_key != nullptr) {
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_key += 1;
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def._internal.insert(
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std::make_pair(internalAttr::key, DocumentId(0, _key)));
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return;
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}
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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TRI_ASSERT(example.isObject());
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size_t n = static_cast<size_t>(example.length());
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def._pids.reserve(n);
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def._values.reserve(n);
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try {
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for (auto const& it : VPackObjectIterator(example)) {
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TRI_ASSERT(it.key.isString());
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std::string key = it.key.copyString();
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auto pid = _shaper->lookupAttributePathByName(key.c_str());
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if (pid == 0) {
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// Internal attributes do have pid == 0.
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if (key.at(0) != '_') {
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// no attribute path found. this means the result will be empty
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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if (!it.value.isString()) {
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THROW_ARANGO_EXCEPTION(TRI_ERROR_TYPE_ERROR);
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}
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std::string keyVal = it.value.copyString();
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if (key == TRI_VOC_ATTRIBUTE_KEY) {
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def._internal.insert(
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std::make_pair(internalAttr::key, DocumentId(0, keyVal)));
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} else if (key == TRI_VOC_ATTRIBUTE_REV) {
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def._internal.insert(
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std::make_pair(internalAttr::rev, DocumentId(0, keyVal)));
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} else {
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std::string colName = keyVal.substr(0, keyVal.find("/"));
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keyVal = keyVal.substr(keyVal.find("/") + 1, keyVal.length());
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if (TRI_VOC_ATTRIBUTE_ID == key) {
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def._internal.insert(std::make_pair(
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internalAttr::id,
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DocumentId(resolver->getCollectionId(colName), keyVal)));
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} else if (TRI_VOC_ATTRIBUTE_FROM == key) {
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def._internal.insert(std::make_pair(
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internalAttr::from,
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DocumentId(resolver->getCollectionId(colName), keyVal)));
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} else if (TRI_VOC_ATTRIBUTE_TO == key) {
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def._internal.insert(std::make_pair(
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internalAttr::to,
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DocumentId(resolver->getCollectionId(colName), keyVal)));
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} else {
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// no attribute path found. this means the result will be empty
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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}
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} else {
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def._pids.push_back(pid);
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auto value = TRI_ShapedJsonVelocyPack(_shaper, it.value, false);
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if (value == nullptr) {
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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def._values.push_back(value);
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}
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}
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} catch (std::bad_alloc const&) {
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ExampleMatcher::cleanup();
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throw;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Constructor using a v8::Object example
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////////////////////////////////////////////////////////////////////////////////
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ExampleMatcher::ExampleMatcher(v8::Isolate* isolate,
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v8::Handle<v8::Object> const example,
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VocShaper* shaper, std::string& errorMessage)
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: _shaper(shaper) {
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v8::Handle<v8::Array> names = example->GetOwnPropertyNames();
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size_t n = names->Length();
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ExampleDefinition def;
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try {
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ExampleMatcher::fillExampleDefinition(isolate, example, names, n,
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errorMessage, def);
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definitions.emplace_back(std::move(def));
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} catch (...) {
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CleanupShapes(def._values);
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ExampleMatcher::cleanup();
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throw;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Constructor using an v8::Array of v8::Object examples
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////////////////////////////////////////////////////////////////////////////////
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ExampleMatcher::ExampleMatcher(v8::Isolate* isolate,
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v8::Handle<v8::Array> const examples,
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VocShaper* shaper, std::string& errorMessage)
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: _shaper(shaper) {
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size_t exCount = examples->Length();
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for (size_t j = 0; j < exCount; ++j) {
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auto tmp = examples->Get((uint32_t)j);
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if (!tmp->IsObject() || tmp->IsArray()) {
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// Right now silently ignore this example
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continue;
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}
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v8::Handle<v8::Object> example = v8::Handle<v8::Object>::Cast(tmp);
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v8::Handle<v8::Array> names = example->GetOwnPropertyNames();
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size_t n = names->Length();
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ExampleDefinition def;
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try {
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ExampleMatcher::fillExampleDefinition(isolate, example, names, n,
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errorMessage, def);
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definitions.emplace_back(std::move(def));
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} catch (...) {
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CleanupShapes(def._values);
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ExampleMatcher::cleanup();
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throw;
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Constructor using a TRI_json_t object
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////////////////////////////////////////////////////////////////////////////////
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ExampleMatcher::ExampleMatcher(TRI_json_t const* example, VocShaper* shaper,
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CollectionNameResolver const* resolver)
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: _shaper(shaper) {
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if (TRI_IsObjectJson(example) || TRI_IsStringJson(example)) {
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ExampleDefinition def;
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try {
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ExampleMatcher::fillExampleDefinition(example, resolver, def);
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} catch (...) {
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CleanupShapes(def._values);
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ExampleMatcher::cleanup();
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throw;
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}
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definitions.emplace_back(std::move(def));
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} else if (TRI_IsArrayJson(example)) {
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size_t size = TRI_LengthArrayJson(example);
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for (size_t i = 0; i < size; ++i) {
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ExampleDefinition def;
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try {
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ExampleMatcher::fillExampleDefinition(TRI_LookupArrayJson(example, i),
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resolver, def);
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definitions.emplace_back(std::move(def));
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} catch (arangodb::basics::Exception& e) {
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if (e.code() != TRI_RESULT_ELEMENT_NOT_FOUND) {
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CleanupShapes(def._values);
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ExampleMatcher::cleanup();
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throw;
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}
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// Result not found might happen. Ignore here because all other elemens
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// might be matched.
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}
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}
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if (definitions.empty()) {
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// None of the given examples could ever match.
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// Throw result not found so client can short circuit.
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Constructor using a VelocyPack object
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/// Note: allowStrings is used to define if strings in example-array
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/// should be matched to _id
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////////////////////////////////////////////////////////////////////////////////
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ExampleMatcher::ExampleMatcher(VPackSlice const& example, VocShaper* shaper,
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CollectionNameResolver const* resolver,
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bool allowStrings)
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: _shaper(shaper) {
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if (example.isObject() || example.isString()) {
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ExampleDefinition def;
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try {
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ExampleMatcher::fillExampleDefinition(example, resolver, def);
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} catch (...) {
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CleanupShapes(def._values);
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ExampleMatcher::cleanup();
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throw;
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}
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definitions.emplace_back(std::move(def));
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} else if (example.isArray()) {
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for (auto const& e : VPackArrayIterator(example)) {
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ExampleDefinition def;
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if (!allowStrings && e.isString()) {
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// We do not match strings in Array
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continue;
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}
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try {
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ExampleMatcher::fillExampleDefinition(e, resolver, def);
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definitions.emplace_back(std::move(def));
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} catch (arangodb::basics::Exception& e) {
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if (e.code() != TRI_RESULT_ELEMENT_NOT_FOUND) {
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CleanupShapes(def._values);
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ExampleMatcher::cleanup();
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throw;
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}
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// Result not found might happen. Ignore here because all other elemens
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// might be matched.
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}
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}
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if (definitions.empty()) {
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// None of the given examples could ever match.
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// Throw result not found so client can short circuit.
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THROW_ARANGO_EXCEPTION(TRI_RESULT_ELEMENT_NOT_FOUND);
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Checks if the given mptr matches the examples in this class
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////////////////////////////////////////////////////////////////////////////////
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bool ExampleMatcher::matches(TRI_voc_cid_t cid,
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TRI_doc_mptr_t const* mptr) const {
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if (mptr == nullptr) {
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return false;
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}
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TRI_shaped_json_t document;
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TRI_EXTRACT_SHAPED_JSON_MARKER(document, mptr->getDataPtr());
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for (auto const& def : definitions) {
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if (!def._internal.empty()) {
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// Match _key
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auto it = def._internal.find(internalAttr::key);
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if (it != def._internal.end()) {
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if (strcmp(it->second.key.c_str(), TRI_EXTRACT_MARKER_KEY(mptr)) != 0) {
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goto nextExample;
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}
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}
|
|
// Match _rev
|
|
it = def._internal.find(internalAttr::rev);
|
|
if (it != def._internal.end()) {
|
|
if (arangodb::basics::StringUtils::uint64(it->second.key) !=
|
|
mptr->_rid) {
|
|
goto nextExample;
|
|
}
|
|
}
|
|
// Match _id
|
|
it = def._internal.find(internalAttr::id);
|
|
if (it != def._internal.end()) {
|
|
if (cid != it->second.cid) {
|
|
goto nextExample;
|
|
}
|
|
if (strcmp(it->second.key.c_str(), TRI_EXTRACT_MARKER_KEY(mptr)) != 0) {
|
|
goto nextExample;
|
|
}
|
|
}
|
|
// Match _to
|
|
it = def._internal.find(internalAttr::to);
|
|
if (it != def._internal.end()) {
|
|
if (!TRI_IS_EDGE_MARKER(mptr)) {
|
|
goto nextExample;
|
|
}
|
|
if (it->second.cid != TRI_EXTRACT_MARKER_TO_CID(mptr)) {
|
|
goto nextExample;
|
|
}
|
|
if (strcmp(it->second.key.c_str(), TRI_EXTRACT_MARKER_TO_KEY(mptr)) !=
|
|
0) {
|
|
goto nextExample;
|
|
}
|
|
}
|
|
// Match _from
|
|
it = def._internal.find(internalAttr::from);
|
|
if (it != def._internal.end()) {
|
|
if (!TRI_IS_EDGE_MARKER(mptr)) {
|
|
goto nextExample;
|
|
}
|
|
if (it->second.cid != TRI_EXTRACT_MARKER_FROM_CID(mptr)) {
|
|
goto nextExample;
|
|
}
|
|
if (strcmp(it->second.key.c_str(), TRI_EXTRACT_MARKER_FROM_KEY(mptr)) !=
|
|
0) {
|
|
goto nextExample;
|
|
}
|
|
}
|
|
}
|
|
TRI_shaped_json_t result;
|
|
TRI_shape_t const* shape;
|
|
|
|
for (size_t i = 0; i < def._values.size(); ++i) {
|
|
TRI_shaped_json_t* example = def._values[i];
|
|
|
|
bool ok = _shaper->extractShapedJson(&document, example->_sid,
|
|
def._pids[i], &result, &shape);
|
|
|
|
if (!ok || shape == nullptr) {
|
|
goto nextExample;
|
|
}
|
|
|
|
if (result._data.length != example->_data.length) {
|
|
// suppress excessive log spam
|
|
// LOG(TRACE) << "expecting length " << // (unsigned long) result._data.length << ", got length " << // (unsigned long) example->_data.length << " for path " << // (unsigned long) pids[i];
|
|
|
|
goto nextExample;
|
|
}
|
|
|
|
if (result._data.length > 0 &&
|
|
memcmp(result._data.data, example->_data.data,
|
|
example->_data.length) != 0) {
|
|
// suppress excessive log spam
|
|
// LOG(TRACE) << "data mismatch at path " << pids[i];
|
|
goto nextExample;
|
|
}
|
|
}
|
|
// If you get here this example matches. Successful hit.
|
|
return true;
|
|
nextExample:
|
|
// This Example does not match, try the next one. Goto requires a statement
|
|
continue;
|
|
}
|
|
return false;
|
|
}
|