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#ifndef CPPTL_JSON_H_INCLUDED # define CPPTL_JSON_H_INCLUDED # include "forwards.h" # include <string> # include <vector> # ifndef JSON_USE_CPPTL_SMALLMAP # include <map> # else # include <cpptl/smallmap.h> # endif # ifdef JSON_USE_CPPTL # include <cpptl/forwards.h> # endif /** \brief JSON (JavaScript Object Notation). */ namespace Json { /** \brief Type of the value held by a Value object. */ enum ValueType { nullValue = 0, ///< 'null' value intValue, ///< signed integer value uintValue, ///< unsigned integer value realValue, ///< double value stringValue, ///< UTF-8 string value booleanValue, ///< bool value arrayValue, ///< array value (ordered list) objectValue ///< object value (collection of name/value pairs). }; enum CommentPlacement { commentBefore = 0, ///< a comment placed on the line before a value commentAfterOnSameLine, ///< a comment just after a value on the same line commentAfter, ///< a comment on the line after a value (only make sense for root value) numberOfCommentPlacement }; //# ifdef JSON_USE_CPPTL // typedef CppTL::AnyEnumerator<const char *> EnumMemberNames; // typedef CppTL::AnyEnumerator<const Value &> EnumValues; //# endif /** \brief Lightweight wrapper to tag static string. * * Value constructor and objectValue member assignement takes advantage of the * StaticString and avoid the cost of string duplication when storing the * string or the member name. * * Example of usage: * \code * Json::Value aValue( StaticString("some text") ); * Json::Value object; * static const StaticString code("code"); * object[code] = 1234; * \endcode */ class JSON_API StaticString { public: explicit StaticString( const char *czstring ) : str_( czstring ) { } operator const char *() const { return str_; } const char *c_str() const { return str_; } private: const char *str_; }; /** \brief Represents a <a HREF="http://www.json.org">JSON</a> value. * * This class is a discriminated union wrapper that can represents a: * - signed integer [range: Value::minInt - Value::maxInt] * - unsigned integer (range: 0 - Value::maxUInt) * - double * - UTF-8 string * - boolean * - 'null' * - an ordered list of Value * - collection of name/value pairs (javascript object) * * The type of the held value is represented by a #ValueType and * can be obtained using type(). * * values of an #objectValue or #arrayValue can be accessed using operator[]() methods. * Non const methods will automatically create the a #nullValue element * if it does not exist. * The sequence of an #arrayValue will be automatically resize and initialized * with #nullValue. resize() can be used to enlarge or truncate an #arrayValue. * * The get() methods can be used to obtanis default value in the case the required element * does not exist. * * It is possible to iterate over the list of a #objectValue values using * the getMemberNames() method. */ class JSON_API Value { friend class ValueIteratorBase; # ifdef JSON_VALUE_USE_INTERNAL_MAP friend class ValueInternalLink; friend class ValueInternalMap; # endif public: typedef std::vector<std::string> Members; typedef ValueIterator iterator; typedef ValueConstIterator const_iterator; typedef Json::UInt UInt; typedef Json::Int Int; typedef UInt ArrayIndex; static const Value null; static const Int minInt; static const Int maxInt; static const UInt maxUInt; private: #ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION # ifndef JSON_VALUE_USE_INTERNAL_MAP class CZString { public: enum DuplicationPolicy { noDuplication = 0, duplicate, duplicateOnCopy }; CZString( int index ); CZString( const char *cstr, DuplicationPolicy allocate ); CZString( const CZString &other ); ~CZString(); CZString &operator =( const CZString &other ); bool operator<( const CZString &other ) const; bool operator==( const CZString &other ) const; int index() const; const char *c_str() const; bool isStaticString() const; private: void swap( CZString &other ); const char *cstr_; int index_; }; public: # ifndef JSON_USE_CPPTL_SMALLMAP typedef std::map<CZString, Value> ObjectValues; # else typedef CppTL::SmallMap<CZString, Value> ObjectValues; # endif // ifndef JSON_USE_CPPTL_SMALLMAP # endif // ifndef JSON_VALUE_USE_INTERNAL_MAP #endif // ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION public: /** \brief Create a default Value of the given type. This is a very useful constructor. To create an empty array, pass arrayValue. To create an empty object, pass objectValue. Another Value can then be set to this one by assignment. This is useful since clear() and resize() will not alter types. Examples: \code Json::Value null_value; // null Json::Value arr_value(Json::arrayValue); // [] Json::Value obj_value(Json::objectValue); // {} \endcode */ Value( ValueType type = nullValue ); Value( Int value ); Value( UInt value ); Value( double value ); Value( const char *value ); Value( const char *beginValue, const char *endValue ); /** \brief Constructs a value from a static string. * Like other value string constructor but do not duplicate the string for * internal storage. The given string must remain alive after the call to this * constructor. * Example of usage: * \code * Json::Value aValue( StaticString("some text") ); * \endcode */ Value( const StaticString &value ); Value( const std::string &value ); # ifdef JSON_USE_CPPTL Value( const CppTL::ConstString &value ); # endif Value( bool value ); Value( const Value &other ); ~Value(); Value &operator=( const Value &other ); /// Swap values. /// \note Currently, comments are intentionally not swapped, for /// both logic and efficiency. void swap( Value &other ); ValueType type() const; bool operator <( const Value &other ) const; bool operator <=( const Value &other ) const; bool operator >=( const Value &other ) const; bool operator >( const Value &other ) const; bool operator ==( const Value &other ) const; bool operator !=( const Value &other ) const; int compare( const Value &other ); const char *asCString() const; std::string asString() const; # ifdef JSON_USE_CPPTL CppTL::ConstString asConstString() const; # endif Int asInt() const; UInt asUInt() const; double asDouble() const; bool asBool() const; bool isNull() const; bool isBool() const; bool isInt() const; bool isUInt() const; bool isIntegral() const; bool isDouble() const; bool isNumeric() const; bool isString() const; bool isArray() const; bool isObject() const; bool isConvertibleTo( ValueType other ) const; /// Number of values in array or object UInt size() const; /// \brief Return true if empty array, empty object, or null; /// otherwise, false. bool empty() const; /// Return isNull() bool operator!() const; /// Remove all object members and array elements. /// \pre type() is arrayValue, objectValue, or nullValue /// \post type() is unchanged void clear(); /// Resize the array to size elements.