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filter_parser.hpp
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filter_parser.hpp
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/* This file is part of Mapnik (c++ mapping toolkit)
* Copyright (C) 2005 Artem Pavlenko
*
* Mapnik is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
//$Id$
#ifndef FILTER_PARSER_HPP
#define FILTER_PARSER_HPP
#include <boost/spirit/core.hpp>
#include <boost/spirit/symbols.hpp>
#include <boost/spirit/utility/confix.hpp>
#include <boost/spirit/utility/escape_char.hpp>
#include <boost/spirit/utility/chset.hpp>
#include "value.hpp"
#include "comparison.hpp"
#include "expression.hpp"
#include "filter.hpp"
#include "regex_filter.hpp"
#include <stack>
#include <iostream>
using namespace boost::spirit;
using std::string;
using std::cerr;
using std::stack;
namespace mapnik
{
template <typename FeatureT>
struct push_integer
{
push_integer(stack<ref_ptr<expression<FeatureT> > >& exprs)
: exprs_(exprs) {}
void operator() (int val) const
{
exprs_.push(ref_ptr<expression<FeatureT> >(new literal<FeatureT>(val)));
}
stack<ref_ptr<expression<FeatureT> > >& exprs_;
};
template <typename FeatureT>
struct push_real
{
push_real(stack<ref_ptr<expression<FeatureT> > >& exprs)
: exprs_(exprs) {}
void operator() (double val) const
{
exprs_.push(ref_ptr<expression<FeatureT> >(new literal<FeatureT>(val)));
}
stack<ref_ptr<expression<FeatureT> > >& exprs_;
};
template <typename FeatureT>
struct push_string
{
push_string(stack<ref_ptr<expression<FeatureT> > >& exprs)
: exprs_(exprs) {}
template <typename Iter>
void operator() (Iter start,Iter end) const
{
string str(start,end);
char quote='\\';
string::size_type idx;
idx = str.find(quote);
while (idx != string::npos)
{
str.erase(idx,1);
idx = str.find(quote);
}
exprs_.push(ref_ptr<expression<FeatureT> >(new literal<FeatureT>(str)));
}
stack<ref_ptr<expression<FeatureT> > >& exprs_;
};
template <typename FeatureT>
struct push_property
{
push_property(stack<ref_ptr<expression<FeatureT> > >& exprs)
: exprs_(exprs) {}
template <typename Iter>
void operator() (Iter start,Iter end) const
{
string str(start,end);
exprs_.push(ref_ptr<expression<FeatureT> >(new property<FeatureT>(str)));
}
stack<ref_ptr<expression<FeatureT> > >& exprs_;
};
template <typename FeatureT,typename Op>
struct compose_expression
{
compose_expression(stack<ref_ptr<expression<FeatureT> > >& exprs)
: exprs_(exprs) {}
template <typename Iter>
void operator() (Iter,Iter) const
{
if (exprs_.size()>=2)
{
ref_ptr<expression<FeatureT> > right = exprs_.top();
exprs_.pop();
ref_ptr<expression<FeatureT> > left = exprs_.top();
exprs_.pop();
if (left && right)
{
exprs_.push(ref_ptr<expression<FeatureT> >(new math_expr_b<FeatureT,Op>(*left,*right)));
}
}
}
stack<ref_ptr<expression<FeatureT> > >& exprs_;
};
template <typename FeatureT>
struct compose_regex
{
compose_regex(stack<ref_ptr<filter<FeatureT> > >& filters,
stack<ref_ptr<expression<FeatureT> > >& exprs)
: filters_(filters),exprs_(exprs) {}
template <typename Iter>
void operator() (Iter start,Iter end) const
{
if (exprs_.size()>=1)
{
ref_ptr<expression<FeatureT> > exp = exprs_.top();
exprs_.pop();
if (exp)
{
std::string pattern(start,end);
try
{
filters_.push(ref_ptr<filter<FeatureT> >(new regex_filter<FeatureT>(*exp,pattern)));
}
catch (...)//boost::regex_error& ex)
{
cerr<<"error\n";//ex.what()<<"\n";
}
}
}
}
stack<ref_ptr<filter<FeatureT> > >& filters_;
stack<ref_ptr<expression<FeatureT> > >& exprs_;
};
template <typename FeatureT,typename Op>
struct compose_filter
{
compose_filter(stack<ref_ptr<filter<FeatureT> > >& filters,
stack<ref_ptr<expression<FeatureT> > >& exprs)
: filters_(filters),exprs_(exprs) {}
template <typename Iter>
void operator() (Iter,Iter) const
{
if (exprs_.size()>=2)
{
ref_ptr<expression<FeatureT> > right = exprs_.top();
exprs_.pop();
ref_ptr<expression<FeatureT> > left = exprs_.top();
exprs_.pop();
if (left && right)
{
filters_.push(ref_ptr<filter<FeatureT> >(new compare_filter<FeatureT,Op>(*left,*right)));
}
}
}
stack<ref_ptr<filter<FeatureT> > >& filters_;
stack<ref_ptr<expression<FeatureT> > >& exprs_;
};
template <typename FeatureT>
struct compose_and_filter
{
compose_and_filter(stack<ref_ptr<filter<FeatureT> > >& filters)
: filters_(filters) {}
template <typename Iter>
void operator() (Iter,Iter) const
{
if (filters_.size()>=2)
{
ref_ptr<filter<FeatureT> > right = filters_.top();
filters_.pop();
ref_ptr<filter<FeatureT> > left = filters_.top();
filters_.pop();
if (left && right)
{
filters_.push(ref_ptr<filter<FeatureT> >(new logical_and<FeatureT>(*left,*right)));
}
}
}
stack<ref_ptr<filter<FeatureT> > >& filters_;
};
template <typename FeatureT>
struct compose_or_filter
{
compose_or_filter(stack<ref_ptr<filter<FeatureT> > >& filters)
: filters_(filters) {}
template <typename Iter>
void operator() (Iter,Iter) const
{
if (filters_.size()>=2)
{
ref_ptr<filter<FeatureT> > right = filters_.top();
filters_.pop();
ref_ptr<filter<FeatureT> > left = filters_.top();
filters_.pop();
if (left && right)
{
filters_.push(ref_ptr<filter<FeatureT> >(new logical_or<FeatureT>(*left,*right)));
}
}
}
stack<ref_ptr<filter<FeatureT> > >& filters_;
};
template <typename FeatureT>
struct compose_not_filter
{
compose_not_filter(stack<ref_ptr<filter<FeatureT> > >& filters)
: filters_(filters) {}
template <typename Iter>
void operator() (Iter,Iter) const
{
if (filters_.size()>=1)
{
ref_ptr<filter<FeatureT> > filter_ = filters_.top();
filters_.pop();
if (filter_)
{
filters_.push(ref_ptr<filter<FeatureT> >(new logical_not<FeatureT>(*filter_)));
}
}
}
stack<ref_ptr<filter<FeatureT> > >& filters_;
};
template <typename FeatureT>
struct filter_grammar : public grammar<filter_grammar<FeatureT> >
{
filter_grammar(stack<ref_ptr<filter<FeatureT> > >& filters_,
stack<ref_ptr<expression<FeatureT> > >& exprs_)
: filters(filters_),exprs(exprs_) {}
template <typename ScannerT>
struct definition
{
definition(filter_grammar const& self)
{
typedef boost::spirit::chset<wchar_t> chset_t;
func1_op = "sqrt","sin","cos";
func2_op = "min","max";
spatial_op = "Equals","Disjoint","Touches","Within","Overlaps",
"Crosses","Intersects","Contains","DWithin","Beyond","BBOX";
chset_t BaseChar (L"\x41-\x5A\x61-\x7A\xC0-\xD6\xD8-\xF6\xF8-\xFF\x100-\x131\x134-\x13E"
L"\x141-\x148\x14A-\x17E\x180-\x1C3\x1CD-\x1F0\x1F4-\x1F5\x1FA-\x217"
L"\x250-\x2A8\x2BB-\x2C1\x386\x388-\x38A\x38C\x38E-\x3A1\x3A3-\x3CE"
L"\x3D0-\x3D6\x3DA\x3DC\x3DE\x3E0\x3E2-\x3F3\x401-\x40C\x40E-\x44F"
L"\x451-\x45C\x45E-\x481\x490-\x4C4\x4C7-\x4C8\x4CB-\x4CC\x4D0-\x4EB"
L"\x4EE-\x4F5\x4F8-\x4F9\x531-\x556\x559\x561-\x586\x5D0-\x5EA"
L"\x5F0-\x5F2\x621-\x63A\x641-\x64A\x671-\x6B7\x6BA-\x6BE\x6C0-\x6CE"
L"\x6D0-\x6D3\x6D5\x6E5-\x6E6\x905-\x939\x93D\x958-\x961\x985-\x98C"
L"\x98F-\x990\x993-\x9A8\x9AA-\x9B0\x9B2\x9B6-\x9B9\x9DC-\x9DD"
L"\x9DF-\x9E1\x9F0-\x9F1\xA05-\xA0A\xA0F-\xA10\xA13-\xA28\xA2A-\xA30"
L"\xA32-\xA33\xA35-\xA36\xA38-\xA39\xA59-\xA5C\xA5E\xA72-\xA74"
L"\xA85-\xA8B\xA8D\xA8F-\xA91\xA93-\xAA8\xAAA-\xAB0\xAB2-\xAB3"
L"\xAB5-\xAB9\xABD\xAE0\xB05-\xB0C\xB0F-\xB10\xB13-\xB28\xB2A-\xB30"
L"\xB32-\xB33\xB36-\xB39\xB3D\xB5C-\xB5D\xB5F-\xB61\xB85-\xB8A"
L"\xB8E-\xB90\xB92-\xB95\xB99-\xB9A\xB9C\xB9E-\xB9F\xBA3-\xBA4"
L"\xBA8-\xBAA\xBAE-\xBB5\xBB7-\xBB9\xC05-\xC0C\xC0E-\xC10\xC12-\xC28"
L"\xC2A-\xC33\xC35-\xC39\xC60-\xC61\xC85-\xC8C\xC8E-\xC90\xC92-\xCA8"
L"\xCAA-\xCB3\xCB5-\xCB9\xCDE\xCE0-\xCE1\xD05-\xD0C\xD0E-\xD10"
L"\xD12-\xD28\xD2A-\xD39\xD60-\xD61\xE01-\xE2E\xE30\xE32-\xE33"
L"\xE40-\xE45\xE81-\xE82\xE84\xE87-\xE88\xE8A\xE8D\xE94-\xE97"
L"\xE99-\xE9F\xEA1-\xEA3\xEA5\xEA7\xEAA-\xEAB\xEAD-\xEAE\xEB0"
L"\xEB2-\xEB3\xEBD\xEC0-\xEC4\xF40-\xF47\xF49-\xF69\x10A0-\x10C5"
L"\x10D0-\x10F6\x1100\x1102-\x1103\x1105-\x1107\x1109\x110B-\x110C"
L"\x110E-\x1112\x113C\x113E\x1140\x114C\x114E\x1150\x1154-\x1155"
L"\x1159\x115F-\x1161\x1163\x1165\x1167\x1169\x116D-\x116E"
L"\x1172-\x1173\x1175\x119E\x11A8\x11AB\x11AE-\x11AF\x11B7-\x11B8"
L"\x11BA\x11BC-\x11C2\x11EB\x11F0\x11F9\x1E00-\x1E9B\x1EA0-\x1EF9"
L"\x1F00-\x1F15\x1F18-\x1F1D\x1F20-\x1F45\x1F48-\x1F4D\x1F50-\x1F57"
L"\x1F59\x1F5B\x1F5D\x1F5F-\x1F7D\x1F80-\x1FB4\x1FB6-\x1FBC\x1FBE"
L"\x1FC2-\x1FC4\x1FC6-\x1FCC\x1FD0-\x1FD3\x1FD6-\x1FDB\x1FE0-\x1FEC"
L"\x1FF2-\x1FF4\x1FF6-\x1FFC\x2126\x212A-\x212B\x212E\x2180-\x2182"
L"\x3041-\x3094\x30A1-\x30FA\x3105-\x312C\xAC00-\xD7A3");
chset_t Ideographic(L"\x4E00-\x9FA5\x3007\x3021-\x3029");
chset_t Letter = BaseChar | Ideographic;
chset_t CombiningChar(L"\x0300-\x0345\x0360-\x0361\x0483-\x0486\x0591-\x05A1\x05A3-\x05B9"
L"\x05BB-\x05BD\x05BF\x05C1-\x05C2\x05C4\x064B-\x0652\x0670"
L"\x06D6-\x06DC\x06DD-\x06DF\x06E0-\x06E4\x06E7-\x06E8\x06EA-\x06ED"
L"\x0901-\x0903\x093C\x093E-\x094C\x094D\x0951-\x0954\x0962-\x0963"
L"\x0981-\x0983\x09BC\x09BE\x09BF\x09C0-\x09C4\x09C7-\x09C8"
L"\x09CB-\x09CD\x09D7\x09E2-\x09E3\x0A02\x0A3C\x0A3E\x0A3F"
L"\x0A40-\x0A42\x0A47-\x0A48\x0A4B-\x0A4D\x0A70-\x0A71\x0A81-\x0A83"
L"\x0ABC\x0ABE-\x0AC5\x0AC7-\x0AC9\x0ACB-\x0ACD\x0B01-\x0B03\x0B3C"
L"\x0B3E-\x0B43\x0B47-\x0B48\x0B4B-\x0B4D\x0B56-\x0B57\x0B82-\x0B83"
L"\x0BBE-\x0BC2\x0BC6-\x0BC8\x0BCA-\x0BCD\x0BD7\x0C01-\x0C03"
L"\x0C3E-\x0C44\x0C46-\x0C48\x0C4A-\x0C4D\x0C55-\x0C56\x0C82-\x0C83"
L"\x0CBE-\x0CC4\x0CC6-\x0CC8\x0CCA-\x0CCD\x0CD5-\x0CD6\x0D02-\x0D03"
L"\x0D3E-\x0D43\x0D46-\x0D48\x0D4A-\x0D4D\x0D57\x0E31\x0E34-\x0E3A"
L"\x0E47-\x0E4E\x0EB1\x0EB4-\x0EB9\x0EBB-\x0EBC\x0EC8-\x0ECD"
L"\x0F18-\x0F19\x0F35\x0F37\x0F39\x0F3E\x0F3F\x0F71-\x0F84"
L"\x0F86-\x0F8B\x0F90-\x0F95\x0F97\x0F99-\x0FAD\x0FB1-\x0FB7\x0FB9"
L"\x20D0-\x20DC\x20E1\x302A-\x302F\x3099\x309A");
chset_t Digit(L"\x0030-\x0039\x0660-\x0669\x06F0-\x06F9\x0966-\x096F\x09E6-\x09EF"
L"\x0A66-\x0A6F\x0AE6-\x0AEF\x0B66-\x0B6F\x0BE7-\x0BEF\x0C66-\x0C6F"
L"\x0CE6-\x0CEF\x0D66-\x0D6F\x0E50-\x0E59\x0ED0-\x0ED9\x0F20-\x0F29");
chset_t Extender(L"\x00B7\x02D0\x02D1\x0387\x0640\x0E46\x0EC6\x3005\x3031-\x3035"
L"\x309D-\x309E\x30FC-\x30FE");
chset_t NameChar =
Letter
| Digit
| L'.'
| L'-'
| L'_'
| L':'
| CombiningChar
| Extender;
number = strict_real_p [push_real<FeatureT>(self.exprs)]
| int_p [push_integer<FeatureT>(self.exprs)];
string_ = confix_p(L'\'',(*lex_escape_ch_p)
[push_string<FeatureT>(self.exprs)],
L'\'');
property = L'[' >> ( (Letter | L'_' | L':')
>> *NameChar )[push_property<FeatureT>(self.exprs)] >> L']';
literal = number | string_ | property;
function = literal | ( func1_op >> L'('>> literal >> L')') |
(func2_op >> L'(' >> literal >> L','>> literal >> L')');
factor = function
| L'(' >> or_expr >> L')'
| ( L'-' >> factor)
;
term = factor
>> *((L'*' >> factor) [compose_expression<FeatureT,mapnik::mult<value> >(self.exprs)]
| (L'/' >> factor) [compose_expression<FeatureT,mapnik::div<value> >(self.exprs)]);
expression = term >> *((L'+' >> term) [compose_expression<FeatureT,mapnik::add<value> >(self.exprs)]
| (L'-' >> term) [compose_expression<FeatureT,mapnik::sub<value> >(self.exprs)]);
regex = str_p(L".match")>>L'('>>confix_p(L'\'',(*lex_escape_ch_p)
[compose_regex<FeatureT>(self.filters,self.exprs)],
L'\'') >>L')';
relation = expression
>> *((L">=" >> expression)
[compose_filter<FeatureT,greater_than_or_equal<value> >(self.filters,self.exprs)]
| (L'>' >> expression)
[compose_filter<FeatureT,mapnik::greater_than<value> >(self.filters,self.exprs)]
| (L'<' >> expression)
[compose_filter<FeatureT,mapnik::less_than<value> >(self.filters,self.exprs)]
| (L"<=" >> expression)
[compose_filter<FeatureT,less_than_or_equal<value> >(self.filters,self.exprs)]
| regex );
equation = relation >> *( ( L'=' >> relation)
[compose_filter<FeatureT,mapnik::equals<value> >(self.filters,self.exprs)]
| ( L"<>" >> relation)
[compose_filter<FeatureT,not_equals<value> >(self.filters,self.exprs)]);
not_expr = equation | *(str_p(L"not") >> equation)[compose_not_filter<FeatureT>(self.filters)];
and_expr = not_expr >> *(L"and" >> not_expr)[compose_and_filter<FeatureT>(self.filters)];
or_expr = and_expr >> *(L"or" >> and_expr)[compose_or_filter<FeatureT>(self.filters)];
filter_statement = or_expr;
}
boost::spirit::rule<ScannerT> const& start() const
{
return filter_statement;
}
boost::spirit::rule<ScannerT> factor;
boost::spirit::rule<ScannerT> term;
boost::spirit::rule<ScannerT> expression;
boost::spirit::rule<ScannerT> relation;
boost::spirit::rule<ScannerT> equation;
boost::spirit::rule<ScannerT> not_expr;
boost::spirit::rule<ScannerT> and_expr;
boost::spirit::rule<ScannerT> or_expr;
boost::spirit::rule<ScannerT> filter_statement;
boost::spirit::rule<ScannerT> literal;
boost::spirit::rule<ScannerT> number;
boost::spirit::rule<ScannerT> string_;
boost::spirit::rule<ScannerT> property;
boost::spirit::rule<ScannerT> function;
boost::spirit::rule<ScannerT> regex;
symbols<string> func1_op;
symbols<string> func2_op;
symbols<string> spatial_op;
};
stack<ref_ptr<filter<FeatureT> > >& filters;
stack<ref_ptr<expression<FeatureT> > >& exprs;
};
}
#endif //FILTER_PARSER_HPP