2 // Open Service Platform
3 // Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 // Licensed under the Apache License, Version 2.0 (the License);
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
9 // http://www.apache.org/licenses/LICENSE-2.0
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
19 * @file FBaseColIHashCodeProvider.h
20 * @brief This is the header file for the %IHashCodeProvider interface.
22 * This header file contains the declarations of the %IHashCodeProvider interface.
24 #ifndef _FBASE_COL_IHASH_CODE_PROVIDER_H_
25 #define _FBASE_COL_IHASH_CODE_PROVIDER_H_
27 namespace Tizen {namespace Base
32 namespace Tizen { namespace Base { namespace Collection
36 * @interface IHashCodeProvider
37 * @brief This interface represents classes that can provide the hash code of a specific type of object.
41 * The %IHashCodeProvider interface represents classes that can provide the hash code of a specific type of object.
43 class _OSP_EXPORT_ IHashCodeProvider
47 * This polymorphic destructor should be overridden if required. @n
48 * This way, the destructors of the derived classes are called when the destructor of this interface is called.
52 virtual ~IHashCodeProvider(void) {}
55 * Gets the hash code of the specified object.
59 * @return The hash code of the specified object
60 * @param[in] obj A pointer to the object whose hash code is required
61 * @remarks The hash algorithm is usually specific to a type.
62 * Two equal instances must return the same hash value.
63 * For better performance, the used hash function must generate a random distribution for all inputs.
65 virtual int GetHashCode(const Tizen::Base::Object& obj) const = 0;
69 // This method is for internal use only. Using this method can cause behavioral, security-related,
70 // and consistency-related issues in the application.
71 // This method is reserved and may change its name at any time without prior notice.
75 virtual void IHashCodeProvider_Reserved1(void) { }
79 // This method is for internal use only. Using this method can cause behavioral, security-related,
80 // and consistency-related issues in the application.
81 // This method is reserved and may change its name at any time without prior notice.
85 virtual void IHashCodeProvider_Reserved2(void) { }
87 }; // IHashCodeProvider
89 }}} // Tizen::Base::Collection
91 #endif // _FBASE_COL_IHASH_CODE_PROVIDER_H_