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// Copyright 2020 Google LLC
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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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#import "FirebasePerformance/Sources/Instrumentation/FPRInstrument.h"
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#import <GoogleUtilities/GULSwizzledObject.h>
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@class FPRSelectorInstrumentor;
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NS_ASSUME_NONNULL_BEGIN
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/** Defines the interface that an instrumentor should implement if they are going to instrument
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* objects.
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*/
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@protocol FPRObjectInstrumentorProtocol <NSObject>
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@required
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/** Registers an instance of the delegate class to be instrumented.
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*
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* @param object The instance to instrument.
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*/
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- (void)registerObject:(id)object;
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@end
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/** This class allows the instrumentation of specific objects by isa swizzling specific instances
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* with a dynamically generated subclass of the object's original class and installing methods
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* onto this new class.
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*/
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NS_EXTENSION_UNAVAILABLE("Firebase Performance is not supported for extensions.")
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@interface FPRObjectInstrumentor : FPRInstrument
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/** The instrumented object. */
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@property(nonatomic, weak) id instrumentedObject;
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/** YES if there is reason to swizzle, NO if swizzling is not needed. */
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@property(nonatomic) BOOL hasModifications;
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/** Please use the designated initializer. */
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- (instancetype)init NS_UNAVAILABLE;
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/** Instantiates an instance of this class. The designated initializer.
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*
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* @param object The object to be instrumented.
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* @return An instance of this class.
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*/
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- (instancetype)initWithObject:(id)object NS_DESIGNATED_INITIALIZER;
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/** Attempts to copy a selector from a donor class onto the dynamically generated subclass that the
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* object will adopt when -swizzle is called.
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*
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* @param selector The selector to use.
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* @param aClass The class to copy the selector from.
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* @param isClassSelector YES if the selector is a class selector, NO otherwise.
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*/
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- (void)copySelector:(SEL)selector fromClass:(Class)aClass isClassSelector:(BOOL)isClassSelector;
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/** Swizzles the isa of the object and sets its class to the dynamically created subclass. */
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- (void)swizzle;
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@end
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NS_ASSUME_NONNULL_END
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