628 lines
25 KiB
Plaintext
628 lines
25 KiB
Plaintext
////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2015 Realm Inc.
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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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////////////////////////////////////////////////////////////////////////////
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#import "RJSUtil.hpp"
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void RJSRegisterGlobalClass(JSContextRef ctx, JSObjectRef globalObject, JSClassRef classRef, const char * name, JSValueRef *exception) {
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JSObjectRef classObject = JSObjectMake(ctx, classRef, NULL);
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JSStringRef nameString = JSStringCreateWithUTF8CString(name);
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JSObjectSetProperty(ctx, globalObject, nameString, classObject, kJSPropertyAttributeNone, exception);
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JSStringRelease(nameString);
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}
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JSValueRef RJSMakeError(JSContextRef ctx, RJSException &exp) {
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JSValueRef value = exp.exception();
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return JSObjectMakeError(ctx, 1, &value, NULL);
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}
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JSValueRef RJSMakeError(JSContextRef ctx, std::exception &exp) {
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if (RJSException *rjsExp = dynamic_cast<RJSException *>(&exp)) {
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return RJSMakeError(ctx, *rjsExp);
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}
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return RJSMakeError(ctx, exp.what());
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}
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JSValueRef RJSMakeError(JSContextRef ctx, const std::string &message) {
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JSValueRef value = RJSValueForString(ctx, message);
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return JSObjectMakeError(ctx, 1, &value, NULL);
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}
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std::string RJSStringForJSString(JSStringRef jsString) {
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std::string str;
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size_t maxSize = JSStringGetMaximumUTF8CStringSize(jsString);
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str.resize(maxSize);
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str.resize(JSStringGetUTF8CString(jsString, &str[0], maxSize) - 1);
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return str;
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}
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std::string RJSValidatedStringForValue(JSContextRef ctx, JSValueRef value, const char * name) {
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if (!JSValueIsString(ctx, value)) {
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if (name) {
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throw std::invalid_argument((std::string)"'" + name + "' must be of type 'string'");
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}
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else {
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throw std::invalid_argument("JSValue must be of type 'string'");
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}
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}
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JSValueRef *exception;
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JSStringRef jsString = JSValueToStringCopy(ctx, value, exception);
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if (!jsString) {
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throw RJSException(ctx, *exception);
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}
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return RJSStringForJSString(jsString);
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}
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JSStringRef RJSStringForString(const std::string &str) {
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return JSStringCreateWithUTF8CString(str.c_str());
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}
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JSValueRef RJSValueForString(JSContextRef ctx, const std::string &str) {
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JSStringRef jsStr = RJSStringForString(str);
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JSValueRef value = JSValueMakeString(ctx, jsStr);
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JSStringRelease(jsStr);
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return value;
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}
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bool RJSIsValueArray(JSContextRef ctx, JSValueRef value) {
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static JSStringRef arrayString = JSStringCreateWithUTF8CString("Array");
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return RJSIsValueObjectOfType(ctx, value, arrayString);
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}
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#include <realm.hpp>
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#include "object_store.hpp"
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// check a precondition and throw an exception if it is not met
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// this should be used iff the condition being false indicates a bug in the caller
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// of the function checking its preconditions
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static void RLMPrecondition(bool condition, NSString *name, NSString *format, ...) {
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if (__builtin_expect(condition, 1)) {
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return;
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}
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va_list args;
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va_start(args, format);
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NSString *reason = [[NSString alloc] initWithFormat:format arguments:args];
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va_end(args);
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throw std::runtime_error(reason.UTF8String);
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}
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// FIXME: TrueExpression and FalseExpression should be supported by core in some way
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struct TrueExpression : realm::Expression {
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size_t find_first(size_t start, size_t end) const override
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{
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if (start != end)
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return start;
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return realm::not_found;
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}
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void set_table() override {}
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const realm::Table* get_table() override { return nullptr; }
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};
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struct FalseExpression : realm::Expression {
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size_t find_first(size_t, size_t) const override { return realm::not_found; }
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void set_table() override {}
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const realm::Table* get_table() override { return nullptr; }
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};
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NSString *operatorName(NSPredicateOperatorType operatorType)
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{
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switch (operatorType) {
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case NSLessThanPredicateOperatorType:
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return @"<";
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case NSLessThanOrEqualToPredicateOperatorType:
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return @"<=";
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case NSGreaterThanPredicateOperatorType:
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return @">";
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case NSGreaterThanOrEqualToPredicateOperatorType:
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return @">=";
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case NSEqualToPredicateOperatorType:
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return @"==";
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case NSNotEqualToPredicateOperatorType:
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return @"!=";
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case NSMatchesPredicateOperatorType:
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return @"MATCHES";
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case NSLikePredicateOperatorType:
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return @"LIKE";
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case NSBeginsWithPredicateOperatorType:
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return @"BEGINSWITH";
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case NSEndsWithPredicateOperatorType:
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return @"ENDSWITH";
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case NSInPredicateOperatorType:
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return @"IN";
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case NSContainsPredicateOperatorType:
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return @"CONTAINS";
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case NSBetweenPredicateOperatorType:
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return @"BETWEENS";
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case NSCustomSelectorPredicateOperatorType:
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return @"custom selector";
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}
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return [NSString stringWithFormat:@"unknown operator %lu", (unsigned long)operatorType];
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}
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// add a clause for numeric constraints based on operator type
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template <typename A, typename B>
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void add_numeric_constraint_to_query(realm::Query& query,
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realm::PropertyType datatype,
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NSPredicateOperatorType operatorType,
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A lhs,
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B rhs)
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{
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switch (operatorType) {
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case NSLessThanPredicateOperatorType:
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query.and_query(lhs < rhs);
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break;
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case NSLessThanOrEqualToPredicateOperatorType:
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query.and_query(lhs <= rhs);
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break;
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case NSGreaterThanPredicateOperatorType:
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query.and_query(lhs > rhs);
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break;
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case NSGreaterThanOrEqualToPredicateOperatorType:
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query.and_query(lhs >= rhs);
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break;
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case NSEqualToPredicateOperatorType:
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query.and_query(lhs == rhs);
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break;
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case NSNotEqualToPredicateOperatorType:
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query.and_query(lhs != rhs);
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break;
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default: {
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NSString *error = [NSString stringWithFormat:@"Operator '%@' not supported for type %s", operatorName(operatorType), realm::string_for_property_type(datatype)];
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throw std::runtime_error(error.UTF8String);
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}
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}
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}
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template <typename A, typename B>
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void add_bool_constraint_to_query(realm::Query &query, NSPredicateOperatorType operatorType, A lhs, B rhs) {
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switch (operatorType) {
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case NSEqualToPredicateOperatorType:
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query.and_query(lhs == rhs);
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break;
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case NSNotEqualToPredicateOperatorType:
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query.and_query(lhs != rhs);
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break;
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default: {
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NSString *error = [NSString stringWithFormat:@"Operator '%@' not supported for bool type", operatorName(operatorType)];
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throw std::runtime_error(error.UTF8String);
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}
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}
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}
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void add_string_constraint_to_query(realm::Query &query,
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NSPredicateOperatorType operatorType,
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NSComparisonPredicateOptions predicateOptions,
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realm::Columns<realm::String> &&column,
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NSString *value) {
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bool caseSensitive = !(predicateOptions & NSCaseInsensitivePredicateOption);
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bool diacriticInsensitive = (predicateOptions & NSDiacriticInsensitivePredicateOption);
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RLMPrecondition(!diacriticInsensitive, @"Invalid predicate option",
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@"NSDiacriticInsensitivePredicateOption not supported for string type");
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realm::StringData sd = value.UTF8String;
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switch (operatorType) {
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case NSBeginsWithPredicateOperatorType:
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query.and_query(column.begins_with(sd, caseSensitive));
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break;
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case NSEndsWithPredicateOperatorType:
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query.and_query(column.ends_with(sd, caseSensitive));
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break;
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case NSContainsPredicateOperatorType:
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query.and_query(column.contains(sd, caseSensitive));
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break;
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case NSEqualToPredicateOperatorType:
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query.and_query(column.equal(sd, caseSensitive));
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break;
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case NSNotEqualToPredicateOperatorType:
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query.and_query(column.not_equal(sd, caseSensitive));
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break;
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default: {
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NSString *error = [NSString stringWithFormat:@"Operator '%@' not supported for string type", operatorName(operatorType)];
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throw std::runtime_error(error.UTF8String);
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}
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}
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}
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void add_string_constraint_to_query(realm::Query& query,
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NSPredicateOperatorType operatorType,
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NSComparisonPredicateOptions predicateOptions,
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NSString *value,
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realm::Columns<realm::String>&& column) {
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switch (operatorType) {
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case NSEqualToPredicateOperatorType:
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case NSNotEqualToPredicateOperatorType:
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add_string_constraint_to_query(query, operatorType, predicateOptions, std::move(column), value);
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break;
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default: {
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NSString *error = [NSString stringWithFormat:@"Operator '%@' is not supported for string type with key path on right side of operator",
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operatorName(operatorType)];
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throw std::runtime_error(error.UTF8String);
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}
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}
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}
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template<typename T>
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static inline T *RLMDynamicCast(__unsafe_unretained id obj) {
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if ([obj isKindOfClass:[T class]]) {
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return obj;
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}
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return nil;
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}
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id value_from_constant_expression_or_value(id value) {
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if (NSExpression *exp = RLMDynamicCast<NSExpression>(value)) {
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RLMPrecondition(exp.expressionType == NSConstantValueExpressionType,
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@"Invalid value",
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@"Expressions within predicate aggregates must be constant values");
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return exp.constantValue;
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}
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return value;
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}
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// iterate over an array of subpredicates, using @func to build a query from each
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// one and ORing them together
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template<typename Func>
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void process_or_group(realm::Query &query, id array, Func&& func) {
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RLMPrecondition([array conformsToProtocol:@protocol(NSFastEnumeration)],
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@"Invalid value", @"IN clause requires an array of items");
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query.group();
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bool first = true;
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for (id item in array) {
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if (!first) {
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query.Or();
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}
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first = false;
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func(item);
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}
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if (first) {
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// Queries can't be empty, so if there's zero things in the OR group
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// validation will fail. Work around this by adding an expression which
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// will never find any rows in a table.
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query.expression(new FalseExpression);
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}
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query.end_group();
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}
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template <typename RequestedType, typename TableGetter>
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struct ColumnOfTypeHelper {
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static realm::Columns<RequestedType> convert(TableGetter&& table, NSUInteger idx)
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{
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return table()->template column<RequestedType>(idx);
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}
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};
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template <typename TableGetter>
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struct ColumnOfTypeHelper<realm::DateTime, TableGetter> {
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static realm::Columns<realm::Int> convert(TableGetter&& table, NSUInteger idx)
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{
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return table()->template column<realm::Int>(idx);
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}
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};
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template <typename RequestedType, typename TableGetter>
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struct ValueOfTypeHelper;
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template <typename TableGetter>
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struct ValueOfTypeHelper<realm::DateTime, TableGetter> {
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static realm::Int convert(TableGetter&&, id value)
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{
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return [value timeIntervalSince1970];
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}
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};
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template <typename TableGetter>
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struct ValueOfTypeHelper<bool, TableGetter> {
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static bool convert(TableGetter&&, id value)
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{
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return [value boolValue];
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}
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};
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template <typename TableGetter>
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struct ValueOfTypeHelper<realm::Double, TableGetter> {
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static realm::Double convert(TableGetter&&, id value)
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{
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return [value doubleValue];
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}
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};
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template <typename TableGetter>
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struct ValueOfTypeHelper<realm::Float, TableGetter> {
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static realm::Float convert(TableGetter&&, id value)
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{
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return [value floatValue];
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}
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};
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template <typename TableGetter>
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struct ValueOfTypeHelper<realm::Int, TableGetter> {
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static realm::Int convert(TableGetter&&, id value)
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{
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return [value longLongValue];
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}
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};
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template <typename TableGetter>
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struct ValueOfTypeHelper<realm::String, TableGetter> {
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static id convert(TableGetter&&, id value)
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{
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return value;
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}
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};
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template <typename RequestedType, typename Value, typename TableGetter>
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auto value_of_type_for_query(TableGetter&& tables, Value&& value)
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{
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const bool isColumnIndex = std::is_same<NSUInteger, typename std::remove_reference<Value>::type>::value;
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using helper = std::conditional_t<isColumnIndex,
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ColumnOfTypeHelper<RequestedType, TableGetter>,
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ValueOfTypeHelper<RequestedType, TableGetter>>;
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return helper::convert(std::forward<TableGetter>(tables), std::forward<Value>(value));
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}
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template <typename... T>
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void add_constraint_to_query(realm::Query &query, realm::PropertyType type,
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NSPredicateOperatorType operatorType,
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NSComparisonPredicateOptions predicateOptions,
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std::vector<NSUInteger> linkColumns, T... values)
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{
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static_assert(sizeof...(T) == 2, "add_constraint_to_query accepts only two values as arguments");
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auto table = [&] {
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realm::TableRef& tbl = query.get_table();
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for (NSUInteger col : linkColumns) {
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tbl->link(col); // mutates m_link_chain on table
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}
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return tbl.get();
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};
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switch (type) {
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case realm::PropertyTypeBool:
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add_bool_constraint_to_query(query, operatorType, value_of_type_for_query<bool>(table, values)...);
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break;
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case realm::PropertyTypeDate:
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add_numeric_constraint_to_query(query, type, operatorType, value_of_type_for_query<realm::DateTime>(table, values)...);
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break;
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case realm::PropertyTypeDouble:
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add_numeric_constraint_to_query(query, type, operatorType, value_of_type_for_query<realm::Double>(table, values)...);
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break;
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case realm::PropertyTypeFloat:
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add_numeric_constraint_to_query(query, type, operatorType, value_of_type_for_query<realm::Float>(table, values)...);
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break;
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case realm::PropertyTypeInt:
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add_numeric_constraint_to_query(query, type, operatorType, value_of_type_for_query<realm::Int>(table, values)...);
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break;
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case realm::PropertyTypeString:
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case realm::PropertyTypeData:
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add_string_constraint_to_query(query, operatorType, predicateOptions, value_of_type_for_query<realm::String>(table, values)...);
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break;
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default: {
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NSString *error = [NSString stringWithFormat:@"Object type %s not supported", realm::string_for_property_type(type)];
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throw std::runtime_error(error.UTF8String);
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}
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}
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}
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realm::Property *get_property_from_key_path(realm::Schema &schema, realm::ObjectSchema &desc,
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NSString *keyPath, std::vector<NSUInteger> &indexes, bool isAny)
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{
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realm::Property *prop = nullptr;
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NSString *prevPath = nil;
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NSUInteger start = 0, length = keyPath.length, end = NSNotFound;
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do {
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end = [keyPath rangeOfString:@"." options:0 range:{start, length - start}].location;
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NSString *path = [keyPath substringWithRange:{start, end == NSNotFound ? length - start : end - start}];
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if (prop) {
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RLMPrecondition(prop->type == realm::PropertyTypeObject || prop->type == realm::PropertyTypeArray,
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@"Invalid value", @"Property '%@' is not a link in object of type '%s'", prevPath, desc.name.c_str());
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indexes.push_back(prop->table_column);
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prop = desc.property_for_name(path.UTF8String);
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RLMPrecondition(prop, @"Invalid property name",
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@"Property '%@' not found in object of type '%s'", path, desc.name.c_str());
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}
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else {
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prop = desc.property_for_name(path.UTF8String);
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RLMPrecondition(prop, @"Invalid property name",
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@"Property '%@' not found in object of type '%s'", path, desc.name.c_str());
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if (isAny) {
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RLMPrecondition(prop->type == realm::PropertyTypeArray,
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@"Invalid predicate",
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@"ANY modifier can only be used for RLMArray properties");
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}
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else {
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RLMPrecondition(prop->type != realm::PropertyTypeArray,
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@"Invalid predicate",
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@"RLMArray predicates must contain the ANY modifier");
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}
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}
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if (prop->object_type.length()) {
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desc = *schema.find(prop->object_type);
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}
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prevPath = path;
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start = end + 1;
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} while (end != NSNotFound);
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return prop;
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}
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void update_query_with_value_expression(realm::Schema &schema,
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realm::ObjectSchema &desc,
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realm::Query &query,
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NSString *keyPath,
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id value,
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NSComparisonPredicate *pred)
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{
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bool isAny = pred.comparisonPredicateModifier == NSAnyPredicateModifier;
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std::vector<NSUInteger> indexes;
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realm::Property *prop = get_property_from_key_path(schema, desc, keyPath, indexes, isAny);
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NSUInteger index = prop->table_column;
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// check to see if this is a between query
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if (pred.predicateOperatorType == NSBetweenPredicateOperatorType) {
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throw std::runtime_error("BETWEEN queries not supported");
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}
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// turn IN into ored together ==
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if (pred.predicateOperatorType == NSInPredicateOperatorType) {
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process_or_group(query, value, [&](id item) {
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id normalized = value_from_constant_expression_or_value(item);
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add_constraint_to_query(query, prop->type, NSEqualToPredicateOperatorType,
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pred.options, indexes, index, normalized);
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});
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return;
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}
|
|
|
|
if (pred.leftExpression.expressionType == NSKeyPathExpressionType) {
|
|
add_constraint_to_query(query, prop->type, pred.predicateOperatorType,
|
|
pred.options, indexes, index, value);
|
|
} else {
|
|
add_constraint_to_query(query, prop->type, pred.predicateOperatorType,
|
|
pred.options, indexes, value, index);
|
|
}
|
|
}
|
|
|
|
|
|
void update_query_with_predicate(NSPredicate *predicate, realm::Schema &schema, realm::ObjectSchema &objectSchema, realm::Query &query)
|
|
{
|
|
// Compound predicates.
|
|
if ([predicate isMemberOfClass:[NSCompoundPredicate class]]) {
|
|
NSCompoundPredicate *comp = (NSCompoundPredicate *)predicate;
|
|
|
|
switch ([comp compoundPredicateType]) {
|
|
case NSAndPredicateType:
|
|
if (comp.subpredicates.count) {
|
|
// Add all of the subpredicates.
|
|
query.group();
|
|
for (NSPredicate *subp in comp.subpredicates) {
|
|
update_query_with_predicate(subp, schema, objectSchema, query);
|
|
}
|
|
query.end_group();
|
|
} else {
|
|
// NSCompoundPredicate's documentation states that an AND predicate with no subpredicates evaluates to TRUE.
|
|
query.expression(new TrueExpression);
|
|
}
|
|
break;
|
|
|
|
case NSOrPredicateType: {
|
|
// Add all of the subpredicates with ors inbetween.
|
|
process_or_group(query, comp.subpredicates, [&](__unsafe_unretained NSPredicate *const subp) {
|
|
update_query_with_predicate(subp, schema, objectSchema, query);
|
|
});
|
|
break;
|
|
}
|
|
|
|
case NSNotPredicateType:
|
|
// Add the negated subpredicate
|
|
query.Not();
|
|
update_query_with_predicate(comp.subpredicates.firstObject, schema, objectSchema, query);
|
|
break;
|
|
|
|
default:
|
|
throw std::runtime_error("Invalid compound predicate type - Only support AND, OR and NOT predicate types");
|
|
}
|
|
}
|
|
else if ([predicate isMemberOfClass:[NSComparisonPredicate class]]) {
|
|
NSComparisonPredicate *compp = (NSComparisonPredicate *)predicate;
|
|
|
|
// check modifier
|
|
RLMPrecondition(compp.comparisonPredicateModifier != NSAllPredicateModifier,
|
|
@"Invalid predicate", @"ALL modifier not supported");
|
|
|
|
NSExpressionType exp1Type = compp.leftExpression.expressionType;
|
|
NSExpressionType exp2Type = compp.rightExpression.expressionType;
|
|
|
|
if (compp.comparisonPredicateModifier == NSAnyPredicateModifier) {
|
|
// for ANY queries
|
|
RLMPrecondition(exp1Type == NSKeyPathExpressionType && exp2Type == NSConstantValueExpressionType,
|
|
@"Invalid predicate",
|
|
@"Predicate with ANY modifier must compare a KeyPath with RLMArray with a value");
|
|
}
|
|
|
|
if (compp.predicateOperatorType == NSBetweenPredicateOperatorType || compp.predicateOperatorType == NSInPredicateOperatorType) {
|
|
// Inserting an array via %@ gives NSConstantValueExpressionType, but
|
|
// including it directly gives NSAggregateExpressionType
|
|
if (exp1Type != NSKeyPathExpressionType || (exp2Type != NSAggregateExpressionType && exp2Type != NSConstantValueExpressionType)) {
|
|
NSString * error = [NSString stringWithFormat:@"Predicate with %s operator must compare a KeyPath with an aggregate with two values", compp.predicateOperatorType == NSBetweenPredicateOperatorType ? "BETWEEN" : "IN"];
|
|
throw std::runtime_error(error.UTF8String);
|
|
}
|
|
exp2Type = NSConstantValueExpressionType;
|
|
}
|
|
|
|
if (exp1Type == NSKeyPathExpressionType && exp2Type == NSConstantValueExpressionType) {
|
|
// comparing keypath to value
|
|
update_query_with_value_expression(schema, objectSchema, query, compp.leftExpression.keyPath,
|
|
compp.rightExpression.constantValue, compp);
|
|
}
|
|
else if (exp1Type == NSConstantValueExpressionType && exp2Type == NSKeyPathExpressionType) {
|
|
// comparing value to keypath
|
|
update_query_with_value_expression(schema, objectSchema, query, compp.rightExpression.keyPath,
|
|
compp.leftExpression.constantValue, compp);
|
|
}
|
|
//if (exp1Type == NSKeyPathExpressionType && exp2Type == NSKeyPathExpressionType) {
|
|
// both expression are KeyPaths
|
|
// update_query_with_column_expression(objectSchema, query, compp.leftExpression.keyPath,
|
|
// compp.rightExpression.keyPath, compp);
|
|
//}
|
|
else {
|
|
throw std::runtime_error("Predicate expressions must compare a keypath and another keypath or a constant value");
|
|
}
|
|
}
|
|
else if ([predicate isEqual:[NSPredicate predicateWithValue:YES]]) {
|
|
query.expression(new TrueExpression);
|
|
} else if ([predicate isEqual:[NSPredicate predicateWithValue:NO]]) {
|
|
query.expression(new FalseExpression);
|
|
}
|
|
else {
|
|
// invalid predicate type
|
|
throw std::runtime_error("Only support compound, comparison, and constant predicates");
|
|
}
|
|
}
|
|
|
|
void RLMUpdateQueryWithPredicate(realm::Query *query, NSPredicate *predicate, realm::Schema &schema, realm::ObjectSchema &objectSchema)
|
|
{
|
|
// passing a nil predicate is a no-op
|
|
if (!predicate) {
|
|
return;
|
|
}
|
|
|
|
RLMPrecondition([predicate isKindOfClass:NSPredicate.class], @"Invalid argument", @"predicate must be an NSPredicate object");
|
|
|
|
update_query_with_predicate(predicate, schema, objectSchema, *query);
|
|
|
|
// Test the constructed query in core
|
|
std::string validateMessage = query->validate();
|
|
RLMPrecondition(validateMessage.empty(), @"Invalid query", @"%.*s", (int)validateMessage.size(), validateMessage.c_str());
|
|
}
|