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Add PropertyStream

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This commit is contained in:
Vinnie Falco
2013-10-06 17:30:44 -07:00
parent 3cf0729878
commit fcfa10d508
6 changed files with 619 additions and 0 deletions
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beast/utility/impl/PropertyStream.cpp
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//------------------------------------------------------------------------------
/*
This file is part of Beast: https://github.com/vinniefalco/Beast
Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#include "../PropertyStream.h"
#include <limits>
namespace beast {
PropertyStream::Item::Item (Source* source)
: m_source (source)
{
}
PropertyStream::Source& PropertyStream::Item::source() const
{
return *m_source;
}
PropertyStream::Source* PropertyStream::Item::operator-> () const
{
return &source();
}
PropertyStream::Source& PropertyStream::Item::operator* () const
{
return source();
}
//------------------------------------------------------------------------------
void PropertyStream::Sink::write (std::string const& key, int32 value)
{
lexical_write (key, value);
}
void PropertyStream::Sink::write (std::string const& key, uint32 value)
{
lexical_write (key, value);
}
void PropertyStream::Sink::write (std::string const& key, int64 value)
{
if (value <= std::numeric_limits <int32>::max() &&
value >= std::numeric_limits <int32>::min())
{
write (key, int32(value));
}
else
{
lexical_write (key, value);
}
}
void PropertyStream::Sink::write (std::string const& key, uint64 value)
{
if (value <= std::numeric_limits <uint32>::max() &&
value >= std::numeric_limits <uint32>::min())
{
write (key, uint32(value));
}
else
{
lexical_write (key, value);
}
}
void PropertyStream::Sink::write (int32 value)
{
lexical_write (value);
}
void PropertyStream::Sink::write (uint32 value)
{
lexical_write (value);
}
void PropertyStream::Sink::write (int64 value)
{
if (value <= std::numeric_limits <int32>::max() &&
value >= std::numeric_limits <int32>::min())
{
write (int32(value));
}
else
{
lexical_write (value);
}
}
void PropertyStream::Sink::write (uint64 value)
{
if (value <= std::numeric_limits <uint32>::max() &&
value >= std::numeric_limits <uint32>::min())
{
write (uint32(value));
}
else
{
lexical_write (value);
}
}
//------------------------------------------------------------------------------
PropertyStream::Proxy::Proxy (PropertyStream stream, std::string const& key)
: m_stream (stream)
, m_key (key)
{
}
//------------------------------------------------------------------------------
PropertyStream::ScopedObject::ScopedObject (std::string const& key, PropertyStream stream)
: m_stream (stream)
{
m_stream.begin_object (key);
}
PropertyStream::ScopedObject::~ScopedObject ()
{
m_stream.end_object ();
}
//------------------------------------------------------------------------------
PropertyStream::Source::Source (std::string const& name)
: m_name (name)
, m_state (this)
{
}
PropertyStream::Source::~Source ()
{
SharedState::Access state (m_state);
if (state->parent != nullptr)
state->parent->remove (*this);
removeAll (state);
}
void PropertyStream::Source::remove (
SharedState::Access& state, SharedState::Access& childState)
{
bassert (childState->parent == this);
state->children.erase (
state->children.iterator_to (
childState->item));
childState->parent = nullptr;
}
void PropertyStream::Source::removeAll (SharedState::Access& state)
{
for (List <Item>::iterator iter (state->children.begin());
iter != state->children.end();)
{
SharedState::Access childState ((*iter)->m_state);
remove (state, childState);
}
}
void PropertyStream::Source::add (Source& source)
{
SharedState::Access state (m_state);
SharedState::Access childState (source.m_state);
bassert (childState->parent == nullptr);
state->children.push_back (childState->item);
childState->parent = this;
}
void PropertyStream::Source::remove (Source& child)
{
SharedState::Access state (m_state);
SharedState::Access childState (child.m_state);
remove (state, childState);
}
void PropertyStream::Source::removeAll ()
{
SharedState::Access state (m_state);
removeAll (state);
}
void PropertyStream::Source::write (PropertyStream stream, bool includeChildren)
{
ScopedObject child (m_name, stream);
onWrite (stream);
if (includeChildren)
{
SharedState::Access state (m_state);
for (List <Item>::iterator iter (state->children.begin());
iter != state->children.end(); ++iter)
{
(*iter)->write (stream, true);
}
}
}
void PropertyStream::Source::write (std::string const& path, PropertyStream stream)
{
struct Parser
{
Parser (std::string const& path)
: m_first (path.begin())
, m_last (path.end())
{
}
std::string next ()
{
std::string::const_iterator pos (
std::find (m_first, m_last, '.'));
std::string const s (m_first, pos);
if (pos != m_last)
m_first = pos + 1;
else
m_first = pos;
return s;
}
std::string::const_iterator m_first;
std::string::const_iterator m_last;
};
//-----------------------------------------
if (path.empty ())
{
write (stream, true);
return;
}
Parser p (path);
Source* source (this);
if (p.next() != source->m_name)
return;
for (;;)
{
std::string const s (p.next());
if (s.empty())
{
source->write (stream, false);
break;
}
else if (s == "*")
{
source->write (stream, true);
break;
}
else
{
SharedState::Access state (source->m_state);
for (List <Item>::iterator iter (state->children.begin());;)
{
if (iter->source().m_name == s)
{
source = &iter->source();
break;
}
if (++iter == state->children.end())
return;
}
}
}
}
//------------------------------------------------------------------------------
PropertyStream::PropertyStream ()
: m_sink (&nullSink())
{
}
PropertyStream::PropertyStream (Sink& sink)
: m_sink (&sink)
{
}
PropertyStream::PropertyStream (PropertyStream const& other)
: m_sink (other.m_sink)
{
}
PropertyStream& PropertyStream::operator= (PropertyStream const& other)
{
m_sink = other.m_sink;
return *this;
}
PropertyStream::Proxy PropertyStream::operator[] (std::string const& key) const
{
return Proxy (*this, key);
}
void PropertyStream::begin_object (std::string const& key) const
{
m_sink->begin_object (key);
}
void PropertyStream::end_object () const
{
m_sink->end_object ();
}
PropertyStream::Sink& PropertyStream::nullSink()
{
struct NullSink : Sink
{
void begin_object (std::string const&) { }
void end_object () { }
void write (std::string const&, std::string const&) { }
void begin_array (std::string const&) { }
void end_array () { }
void write (std::string const&) { }
};
static NullSink sink;
return sink;
}
}