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      1 /*
      2  * Copyright (C) 2010 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 IDBKeyPath_h
     27 #define IDBKeyPath_h
     28 
     29 #include "wtf/Vector.h"
     30 #include "wtf/text/WTFString.h"
     31 
     32 namespace blink {
     33 
     34 enum IDBKeyPathParseError {
     35     IDBKeyPathParseErrorNone,
     36     IDBKeyPathParseErrorStart,
     37     IDBKeyPathParseErrorIdentifier,
     38     IDBKeyPathParseErrorDot,
     39 };
     40 
     41 void IDBParseKeyPath(const String&, Vector<String>&, IDBKeyPathParseError&);
     42 
     43 class IDBKeyPath {
     44 public:
     45     IDBKeyPath() : m_type(NullType) { }
     46     explicit IDBKeyPath(const String&);
     47     explicit IDBKeyPath(const Vector<String>& array);
     48 
     49     enum Type {
     50         NullType = 0,
     51         StringType,
     52         ArrayType
     53     };
     54 
     55     Type type() const { return m_type; }
     56 
     57     const Vector<String>& array() const
     58     {
     59         ASSERT(m_type == ArrayType);
     60         return m_array;
     61     }
     62 
     63     const String& string() const
     64     {
     65         ASSERT(m_type == StringType);
     66         return m_string;
     67     }
     68 
     69     bool isNull() const { return m_type == NullType; }
     70     bool isValid() const;
     71     bool operator==(const IDBKeyPath& other) const;
     72 
     73 private:
     74     Type m_type;
     75     String m_string;
     76     Vector<String> m_array;
     77 };
     78 
     79 } // namespace blink
     80 
     81 #endif // IDBKeyPath_h
     82