1 /* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef IDBKey_h 27 #define IDBKey_h 28 29 #include "platform/SharedBuffer.h" 30 #include "platform/heap/Handle.h" 31 #include "wtf/Forward.h" 32 #include "wtf/Vector.h" 33 #include "wtf/text/WTFString.h" 34 35 namespace WebCore { 36 37 class IDBKey : public GarbageCollectedFinalized<IDBKey> { 38 public: 39 typedef HeapVector<Member<IDBKey> > KeyArray; 40 createInvalid()41 static IDBKey* createInvalid() 42 { 43 return new IDBKey(); 44 } 45 createNumber(double number)46 static IDBKey* createNumber(double number) 47 { 48 return new IDBKey(NumberType, number); 49 } 50 createBinary(PassRefPtr<SharedBuffer> binary)51 static IDBKey* createBinary(PassRefPtr<SharedBuffer> binary) 52 { 53 return new IDBKey(binary); 54 } 55 createString(const String & string)56 static IDBKey* createString(const String& string) 57 { 58 return new IDBKey(string); 59 } 60 createDate(double date)61 static IDBKey* createDate(double date) 62 { 63 return new IDBKey(DateType, date); 64 } 65 createMultiEntryArray(const KeyArray & array)66 static IDBKey* createMultiEntryArray(const KeyArray& array) 67 { 68 KeyArray result; 69 70 for (size_t i = 0; i < array.size(); i++) { 71 if (!array[i]->isValid()) 72 continue; 73 74 bool skip = false; 75 for (size_t j = 0; j < result.size(); j++) { 76 if (array[i]->isEqual(result[j].get())) { 77 skip = true; 78 break; 79 } 80 } 81 if (!skip) { 82 result.append(array[i]); 83 } 84 } 85 IDBKey* idbKey = new IDBKey(result); 86 ASSERT(idbKey->isValid()); 87 return idbKey; 88 } 89 createArray(const KeyArray & array)90 static IDBKey* createArray(const KeyArray& array) 91 { 92 return new IDBKey(array); 93 } 94 95 ~IDBKey(); 96 void trace(Visitor*); 97 98 // In order of the least to the highest precedent in terms of sort order. 99 enum Type { 100 InvalidType = 0, 101 ArrayType, 102 BinaryType, 103 StringType, 104 DateType, 105 NumberType, 106 MinType 107 }; 108 type()109 Type type() const { return m_type; } 110 bool isValid() const; 111 array()112 const KeyArray& array() const 113 { 114 ASSERT(m_type == ArrayType); 115 return m_array; 116 } 117 binary()118 PassRefPtr<SharedBuffer> binary() const 119 { 120 ASSERT(m_type == BinaryType); 121 return m_binary; 122 } 123 string()124 const String& string() const 125 { 126 ASSERT(m_type == StringType); 127 return m_string; 128 } 129 date()130 double date() const 131 { 132 ASSERT(m_type == DateType); 133 return m_number; 134 } 135 number()136 double number() const 137 { 138 ASSERT(m_type == NumberType); 139 return m_number; 140 } 141 142 int compare(const IDBKey* other) const; 143 bool isLessThan(const IDBKey* other) const; 144 bool isEqual(const IDBKey* other) const; 145 146 private: IDBKey()147 IDBKey() : m_type(InvalidType), m_number(0) { } IDBKey(Type type,double number)148 IDBKey(Type type, double number) : m_type(type), m_number(number) { } IDBKey(const String & value)149 explicit IDBKey(const String& value) : m_type(StringType), m_string(value), m_number(0) { } IDBKey(PassRefPtr<SharedBuffer> value)150 explicit IDBKey(PassRefPtr<SharedBuffer> value) : m_type(BinaryType), m_binary(value), m_number(0) { } IDBKey(const KeyArray & keyArray)151 explicit IDBKey(const KeyArray& keyArray) : m_type(ArrayType), m_array(keyArray), m_number(0) { } 152 153 const Type m_type; 154 const KeyArray m_array; 155 RefPtr<SharedBuffer> m_binary; 156 const String m_string; 157 const double m_number; 158 }; 159 160 } // namespace WebCore 161 162 #endif // IDBKey_h 163