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| version 1.171, 2002/12/14 12:47:29 | version 1.181, 2003/04/25 12:32:31 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: @b table parser class. | Parser: @b table parser class. |
| Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| */ | */ |
| Line 30 public: // Methoded | Line 30 public: // Methoded |
| // methods | // methods |
| static void get_copy_options(Request& r, const String& method_name, MethodParams *params, int param_index, | static Table::Action_options get_action_options(Request& r, |
| const Table& source, | const String& method_name, MethodParams *params, |
| int& offset, | const Table& source) { |
| int& limit) { | Table::Action_options result; |
| offset=0; | |
| limit=0; | if(!params->size()) |
| if(params->size()<=param_index) | return result; |
| return; | |
| Hash* options=params->get(params->size()-1).get_hash(&method_name); | |
| Value& voptions=params->as_no_junction(param_index, "options must be hash, not code"); | if(!options) |
| if(!voptions.is_string()) { | return result; |
| if(Hash *options=voptions.get_hash(&method_name)) { | |
| int valid_options=0; | result.defined=true; |
| if(Value *voffset=(Value *)options->get(*sql_offset_name)) { | bool defined_offset=false; |
| valid_options++; | |
| if(voffset->is_string()) { | int valid_options=0; |
| const String& soffset=*voffset->get_string(); | if(Value *voffset=(Value *)options->get(*sql_offset_name)) { |
| if(soffset == "cur") | valid_options++; |
| offset=source.current(); | defined_offset=true; |
| else | if(voffset->is_string()) { |
| throw Exception("parser.runtime", | const String& soffset=*voffset->get_string(); |
| &soffset, | if(soffset == "cur") |
| "must be 'cur' string or expression"); | result.offset=source.current(); |
| } else | else |
| offset=r.process_to_value(*voffset).as_int(); | |
| } | |
| if(Value *vlimit=(Value *)options->get(*sql_limit_name)) { | |
| valid_options++; | |
| limit=r.process_to_value(*vlimit).as_int(); | |
| } | |
| if(valid_options!=options->size()) | |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &method_name, | &soffset, |
| "called with invalid option"); | "must be 'cur' string or expression"); |
| } else | } else |
| throw Exception("parser.runtime", | result.offset=r.process_to_value(*voffset).as_int(); |
| &method_name, | } |
| "options must be hash"); | if(Value *vlimit=(Value *)options->get(*sql_limit_name)) { |
| valid_options++; | |
| result.limit=r.process_to_value(*vlimit).as_int(); | |
| } | |
| if(Value *vreverse=(Value *)options->get(*table_reverse_name)) { | |
| valid_options++; | |
| result.reverse=r.process_to_value(*vreverse).as_bool(); | |
| if(result.reverse && !defined_offset) | |
| result.offset=source.size()-1; | |
| } | } |
| if(!limit) // zero limit = sould be 'nothing to copy', for methods zero means 'all' | if(valid_options!=options->size()) |
| limit=-1; // thus fixing | throw Exception("parser.runtime", |
| &method_name, | |
| "called with invalid option"); | |
| return result; | |
| } | |
| static void check_option_param(bool options_defined, | |
| const String& method_name, MethodParams *params, | |
| int next_param_index, | |
| const char *msg) { | |
| if(next_param_index+(options_defined?1:0) != params->size()) | |
| throw Exception("parser.runtime", | |
| &method_name, | |
| "%s", msg); | |
| } | } |
| static void _create(Request& r, const String& method_name, MethodParams *params) { | static void _create(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| // clone/copy part? | // clone/copy part? |
| if(const Table *source=params->get(0).get_table()) { | if(const Table *source=params->get(0).get_table()) { |
| int offset, limit; | Table::Action_options o=get_action_options(r, method_name, params, *source); |
| get_copy_options(r, method_name, params, 1, *source, | check_option_param(o.defined, method_name, params, 1, |
| offset, limit); | "too many parameters"); |
| static_cast<VTable *>(r.get_self())->set_table(*new(pool) Table(pool, *source, offset, limit)); | static_cast<VTable *>(r.get_self())-> |
| set_table(*new(pool) Table(pool, *source, o)); | |
| return; | return; |
| } | } |
| Line 310 static void _menu(Request& r, const Stri | Line 325 static void _menu(Request& r, const Stri |
| } | } |
| #ifndef DOXYGEN | #ifndef DOXYGEN |
| enum Table2hash_distint { D_ILLEGAL, D_FIRST, D_TABLES }; | |
| struct Row_info { | struct Row_info { |
| Request *r; | Request *r; |
| Table *table; | Table *table; |
| Line 317 struct Row_info { | Line 333 struct Row_info { |
| int key_field; | int key_field; |
| Array *value_fields; | Array *value_fields; |
| Hash *hash; | Hash *hash; |
| bool distinct; | Table2hash_distint distinct; |
| int row; | int row; |
| }; | }; |
| #endif | #endif |
| Line 337 static void table_row_to_hash(Array::Ite | Line 353 static void table_row_to_hash(Array::Ite |
| if(!key) | if(!key) |
| return; // ignore rows without key [too-short-record_array if-indexed] | return; // ignore rows without key [too-short-record_array if-indexed] |
| VHash& result=*new(pool) VHash(pool); | switch(ri.distinct) { |
| Hash& hash=*result.get_hash(0); | case D_ILLEGAL: case D_FIRST: |
| for(int i=0; i<ri.value_fields->size(); i++) { | { |
| int value_field=ri.value_fields->get_int(i); | VHash& result=*new(pool) VHash(pool); |
| if(value_field<row.size()) | Hash& hash=*result.get_hash(0); |
| hash.put( | for(int i=0; i<ri.value_fields->size(); i++) { |
| *ri.table->columns()->get_string(value_field), | int value_field=ri.value_fields->get_int(i); |
| new(pool) VString(*row.get_string(value_field))); | if(value_field<row.size()) |
| hash.put( | |
| *ri.table->columns()->get_string(value_field), | |
| new(pool) VString(*row.get_string(value_field))); | |
| } | |
| if(ri.hash->put_dont_replace(*key, &result)) // put. existed? | |
| if(ri.distinct==D_ILLEGAL) | |
| throw Exception("parser.runtime", | |
| key, | |
| "duplicate key"); | |
| } | |
| break; | |
| case D_TABLES: | |
| { | |
| VTable* vtable=(VTable*)ri.hash->get(*key); // put. table existed? | |
| Table* table; | |
| if(vtable) | |
| table=vtable->get_table(); | |
| else { | |
| // no? creating table of same structure as source | |
| Table::Action_options table_options(0, 0); | |
| table=new(pool) Table(pool, *ri.table, table_options/*no rows, just structure*/); | |
| ri.hash->put(*key, new(pool) VTable(pool, table)); | |
| } | |
| *table+=&row; | |
| } | |
| break; | |
| default: | |
| throw Exception(0, | |
| 0, | |
| "invalid distinct code (#%d)", ri.distinct); | |
| } | } |
| if(ri.hash->put_dont_replace(*key, &result)) // put. existed? | |
| if(!ri.distinct) | |
| throw Exception("parser.runtime", | |
| key, | |
| "duplicate key"); | |
| } | } |
| static void _hash(Request& r, const String& method_name, MethodParams *params) { | static void _hash(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| Line 359 static void _hash(Request& r, const Stri | Line 401 static void _hash(Request& r, const Stri |
| Value& result=*new(pool) VHash(pool); | Value& result=*new(pool) VHash(pool); |
| if(const Array *columns=self_table.columns()) | if(const Array *columns=self_table.columns()) |
| if(columns->size()>0) { | if(columns->size()>0) { |
| bool distinct=false; | Table2hash_distint distinct=D_ILLEGAL; |
| int param_index=params->size()-1; | int param_index=params->size()-1; |
| if(param_index>0) { | if(param_index>0) { |
| if(Hash *options= | if(Hash *options= |
| params->as_no_junction(param_index, "param must not be code").get_hash(0)) { | params->as_no_junction(param_index, "param must not be code").get_hash(0)) { |
| --param_index; | --param_index; |
| int valid_options=0; | int valid_options=0; |
| if(Value *vdistinct=(Value *)options->get(*sql_distinct_name)) { | if(Value *vdistinct_code=(Value *)options->get(*sql_distinct_name)) { |
| valid_options++; | valid_options++; |
| distinct=r.process_to_value(*vdistinct).as_bool(); | Value& vdistinct_value=r.process_to_value(*vdistinct_code); |
| if(vdistinct_value.is_string()) { | |
| const String& sdistinct=*vdistinct_value.get_string(); | |
| if(sdistinct=="tables") | |
| distinct=D_TABLES; | |
| else | |
| throw Exception("parser.runtime", | |
| &sdistinct, | |
| "must be 'tables' or true/false"); | |
| } else | |
| distinct=vdistinct_value.as_bool()?D_FIRST:D_ILLEGAL; | |
| } | } |
| if(valid_options!=options->size()) | if(valid_options!=options->size()) |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| Line 383 static void _hash(Request& r, const Stri | Line 435 static void _hash(Request& r, const Stri |
| Array value_fields(pool); | Array value_fields(pool); |
| if(param_index>0) { | if(param_index>0) { |
| if(distinct!=D_ILLEGAL && distinct!=D_FIRST) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "in distinct[tables] mode you may not specify value field(s)"); | |
| Value& value_fields_param=params->as_no_junction(param_index, "value field(s) must not be code"); | Value& value_fields_param=params->as_no_junction(param_index, "value field(s) must not be code"); |
| if(value_fields_param.is_string()) { | if(value_fields_param.is_string()) { |
| value_fields+=self_table.column_name2index(value_fields_param.as_string(), true); | value_fields+=self_table.column_name2index(value_fields_param.as_string(), true); |
| Line 398 static void _hash(Request& r, const Stri | Line 454 static void _hash(Request& r, const Stri |
| "value field(s) must be string or self_table" | "value field(s) must be string or self_table" |
| ); | ); |
| } else { // by all columns, including key | } else { // by all columns, including key |
| for(int i=0; i<columns->size(); i++) | if(!(distinct!=D_ILLEGAL && distinct!=D_FIRST)) |
| value_fields+=i; | for(int i=0; i<columns->size(); i++) |
| value_fields+=i; | |
| } | } |
| Value& key_param=params->get(0); | Value& key_param=params->get(0); |
| Line 407 static void _hash(Request& r, const Stri | Line 464 static void _hash(Request& r, const Stri |
| int key_field=key_code?-1 | int key_field=key_code?-1 |
| :self_table.column_name2index(key_param.as_string(), true); | :self_table.column_name2index(key_param.as_string(), true); |
| Row_info row_info={&r, &self_table, key_code, key_field, &value_fields, result.get_hash(0), distinct}; | Row_info row_info={&r, &self_table, |
| key_code, key_field, &value_fields, | |
| result.get_hash(0), distinct}; | |
| int saved_current=self_table.current(); | int saved_current=self_table.current(); |
| self_table.for_each(table_row_to_hash, &row_info); | self_table.for_each(table_row_to_hash, &row_info); |
| Line 450 static void _sort(Request& r, const Stri | Line 509 static void _sort(Request& r, const Stri |
| false; // default=asc | false; // default=asc |
| Table& old_table=static_cast<VTable *>(r.get_self())->table(&method_name); | Table& old_table=static_cast<VTable *>(r.get_self())->table(&method_name); |
| if(old_table.size()==0) | |
| return; | |
| Table& new_table=*new(pool) Table(pool, &method_name, old_table.columns()); | Table& new_table=*new(pool) Table(pool, &method_name, old_table.columns()); |
| Table_seq_item *seq=(Table_seq_item *)pool.malloc(sizeof(Table_seq_item)*old_table.size()); | Table_seq_item *seq=(Table_seq_item *)pool.malloc(sizeof(Table_seq_item)*old_table.size()); |
| Line 482 static void _sort(Request& r, const Stri | Line 544 static void _sort(Request& r, const Stri |
| static_cast<VTable *>(r.get_self())->set_table(new_table); | static_cast<VTable *>(r.get_self())->set_table(new_table); |
| } | } |
| static bool _locate_expression(Request& r, const String& method_name, MethodParams *params) { | #ifndef DOXYGEN |
| if(params->size()>1) | struct Locate_expression_func_info { |
| throw Exception("parser.runtime", | Request* r; |
| &method_name, | Value* expression_code; |
| "locate by expression has only one parameter - expression"); | }; |
| #endif | |
| bool locate_expression_func(Table& self, void* ainfo) { | |
| Locate_expression_func_info& info=*static_cast<Locate_expression_func_info*>(ainfo); | |
| return info.r->process_to_value(*info.expression_code).as_bool(); | |
| } | |
| static bool _locate_expression(Table& table, Table::Action_options o, | |
| Request& r, const String& method_name, MethodParams *params) { | |
| check_option_param(o.defined, method_name, params, 1, | |
| "locate by expression only has parameters: expression and, maybe, options"); | |
| Value& expression_code=params->as_junction(0, "must be expression"); | Value& expression_code=params->as_junction(0, "must be expression"); |
| Table& table=static_cast<VTable *>(r.get_self())->table(&method_name); | Locate_expression_func_info info={&r, &expression_code}; |
| int saved_current=table.current(); | return table.locate(locate_expression_func, &info, o); |
| int size=table.size(); | |
| for(int row=0; row<size; row++) { | |
| table.set_current(row); | |
| if(r.process_to_value(expression_code).as_bool()) | |
| return true; | |
| } | |
| table.set_current(saved_current); | |
| return false; | |
| } | } |
| static bool _locate_name_value(Request& r, const String& method_name, MethodParams *params) { | static bool _locate_name_value(Table& table, Table::Action_options o, |
| if(params->size()>2) | Request& r, const String& method_name, MethodParams *params) { |
| throw Exception("parser.runtime", | check_option_param(o.defined, method_name, params, 2, |
| &method_name, | "locate by locate by name has parameters: name, value and, maybe, options"); |
| "locate by name and value has only two parameters - name and value"); | const String& name=params->as_string(0, "column name must be string"); |
| const String& value=params->as_string(1, "value must be string"); | |
| Table& table=static_cast<VTable *>(r.get_self())->table(&method_name); | return table.locate(name, value, o); |
| return table.locate( | |
| params->as_string(0, "column name must be string"), | |
| params->as_string(1, "value must be string") | |
| ); | |
| } | } |
| static void _locate(Request& r, const String& method_name, MethodParams *params) { | static void _locate(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| Table& table=static_cast<VTable *>(r.get_self())->table(&method_name); | |
| Table::Action_options o=get_action_options(r, method_name, params, table); | |
| bool result=params->get(0).get_junction()? | bool result=params->get(0).get_junction()? |
| _locate_expression(r, method_name, params) : | _locate_expression(table, o, r, method_name, params) : |
| _locate_name_value(r, method_name, params); | _locate_name_value(table, o, r, method_name, params); |
| r.write_no_lang(*new(pool) VBool(pool, result)); | r.write_no_lang(*new(pool) VBool(pool, result)); |
| } | } |
| Line 557 static void _append(Request& r, const St | Line 619 static void _append(Request& r, const St |
| static void _join(Request& r, const String& method_name, MethodParams *params) { | static void _join(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| Table *maybe_src=params->as_no_junction(0, "table ref must not be code").get_table(); | Table* maybe_src=params->as_no_junction(0, "table ref must not be code").get_table(); |
| if(!maybe_src) | if(!maybe_src) |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &method_name, | &method_name, |
| "source is not a table"); | "source is not a table"); |
| Table& src=*maybe_src; | Table& src=*maybe_src; |
| Table::Action_options o=get_action_options(r, method_name, params, src); | |
| check_option_param(o.defined, method_name, params, 1, | |
| "invalid extra parameter"); | |
| Table& dest=static_cast<VTable *>(r.get_self())->table(&method_name); | Table& dest=static_cast<VTable *>(r.get_self())->table(&method_name); |
| if(&src == &dest) | if(&src == &dest) |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &method_name, | &method_name, |
| "source and destination are same table"); | "source and destination are same table"); |
| int offset, limit; | if(o.reverse) |
| get_copy_options(r, method_name, params, 1, src, | throw Exception(0, |
| offset, limit); | &method_name, |
| "not implemented in this version, please upgrade"); | |
| if(const Array *dest_columns=dest.columns()) { // dest is named | if(const Array *dest_columns=dest.columns()) { // dest is named |
| int saved_src_current=src.current(); | int saved_src_current=src.current(); |
| int m=src.size()-offset; | int m=src.size()-o.offset; |
| if(!limit || limit>m) | if(o.limit<0 || o.limit>m) |
| limit=m; | o.limit=m; |
| int end=offset+limit; | int end=o.offset+o.limit; |
| for(int src_row=offset; src_row<end; src_row++) { | for(int src_row=o.offset; src_row<end; src_row++) { |
| src.set_current(src_row); | src.set_current(src_row); |
| Array& dest_row=*new(pool) Array(pool); | Array& dest_row=*new(pool) Array(pool); |
| for(int dest_column=0; dest_column<dest_columns->size(); dest_column++) { | for(int dest_column=0; dest_column<dest_columns->size(); dest_column++) { |
| Line 822 MTable::MTable(Pool& apool) : Methoded(a | Line 888 MTable::MTable(Pool& apool) : Methoded(a |
| add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2); | add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2); |
| // ^table.locate[field;value] | // ^table.locate[field;value] |
| add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 2); | add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 3); |
| // ^table.flip[] | // ^table.flip[] |
| add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0); | add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0); |