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140 lines
3.3 KiB
C++
140 lines
3.3 KiB
C++
//
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// PrintHandler.h
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//
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// Library: JSON
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// Package: JSON
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// Module: PrintHandler
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//
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// Definition of the PrintHandler class.
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//
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// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef JSON_PrintHandler_INCLUDED
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#define JSON_PrintHandler_INCLUDED
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#include "Poco/JSON/JSON.h"
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#include "Poco/JSON/Handler.h"
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#include "Poco/JSONString.h"
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namespace Poco {
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namespace JSON {
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class JSON_API PrintHandler: public Handler
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/// PrintHandler formats and prints the JSON object
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/// to either user-provided std::ostream or standard output.
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/// If indent is zero, the output is a condensed JSON string,
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/// otherwise, the proper indentation is applied to elements.
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{
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public:
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using Ptr = SharedPtr<PrintHandler>;
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static const unsigned JSON_PRINT_FLAT = 0;
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PrintHandler(unsigned indent = 0, int options = Poco::JSON_WRAP_STRINGS);
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/// Creates the PrintHandler.
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PrintHandler(std::ostream& out, unsigned indent = 0, int options = Poco::JSON_WRAP_STRINGS);
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/// Creates the PrintHandler.
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~PrintHandler() override;
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/// Destroys the PrintHandler.
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void reset() override;
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/// Resets the handler state.
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void startObject() override;
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/// The parser has read a '{'; a new object is started.
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/// If indent is greater than zero, a newline will be appended.
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void endObject() override;
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/// The parser has read a '}'; the object is closed.
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void startArray() override;
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/// The parser has read a [; a new array will be started.
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/// If indent is greater than zero, a newline will be appended.
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void endArray() override;
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/// The parser has read a ]; the array is closed.
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void key(const std::string& k) override;
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/// A key of an object is read; it will be written to the output,
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/// followed by a ':'. If indent is greater than zero, the colon
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/// is padded by a space before and after.
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void null() override;
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/// A null value is read; "null" will be written to the output.
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void value(int v) override;
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/// An integer value is read.
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void value(unsigned v) override;
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/// An unsigned value is read. This will only be triggered if the
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/// value cannot fit into a signed int.
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#if defined(POCO_HAVE_INT64)
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void value(Int64 v) override;
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/// A 64-bit integer value is read; it will be written to the output.
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void value(UInt64 v) override;
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/// An unsigned 64-bit integer value is read; it will be written to the output.
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#endif
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void value(const std::string& value) override;
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/// A string value is read; it will be formatted and written to the output.
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void value(double d) override;
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/// A double value is read; it will be written to the output.
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void value(bool b) override;
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/// A boolean value is read; it will be written to the output.
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void comma();
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/// A comma is read; it will be written to the output as "true" or "false".
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void setIndent(unsigned indent);
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/// Sets indentation.
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private:
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const char* endLine() const;
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unsigned indent();
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bool printFlat() const;
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void arrayValue();
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bool array() const;
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std::ostream& _out;
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unsigned _indent;
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std::string _tab;
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int _array;
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bool _objStart;
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int _options;
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};
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//
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// inlines
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//
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inline void PrintHandler::setIndent(unsigned indent)
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{
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_indent = indent;
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}
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inline bool PrintHandler::array() const
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{
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return _array > 0;
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}
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} } // namespace Poco::JSON
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#endif // JSON_PrintHandler_INCLUDED
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