1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
7 ------------- Copyright (C) 2004 Jon S. Berndt (jon@jsbsim.org) -------------
9 This program is free software; you can redistribute it and/or modify it under
10 the terms of the GNU Lesser General Public License as published by the Free Software
11 Foundation; either version 2 of the License, or (at your option) any later
14 This program is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
19 You should have received a copy of the GNU Lesser General Public License along with
20 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21 Place - Suite 330, Boston, MA 02111-1307, USA.
23 Further information about the GNU Lesser General Public License can also be found on
24 the world wide web at http://www.gnu.org.
26 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
28 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
33 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
48 #include "math/FGColumnVector3.h"
50 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
52 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
54 #define ID_XMLELEMENT "$Id$"
56 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
58 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
62 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
64 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
66 /** Encapsulates an XML element.
67 This class handles the creation, storage, and manipulation of XML elements.
68 This class also can convert supplied values as follows:
70 convert ["from"]["to"] = factor, so: from * factor = to
71 - convert["M"]["FT"] = 3.2808399;
72 - convert["FT"]["M"] = 1.0/convert["M"]["FT"];
73 - convert["M2"]["FT2"] = convert["M"]["FT"]*convert["M"]["FT"];
74 - convert["FT2"]["M2"] = 1.0/convert["M2"]["FT2"];
75 - convert["FT"]["IN"] = 12.0;
76 - convert["IN"]["FT"] = 1.0/convert["FT"]["IN"];
77 - convert["LBS"]["KG"] = 0.45359237;
78 - convert["KG"]["LBS"] = 1.0/convert["LBS"]["KG"];
79 - convert["SLUG*FT2"]["KG*M2"] = 1.35594;
80 - convert["KG*M2"]["SLUG*FT2"] = 1.0/convert["SLUG*FT2"]["KG*M2"];
81 - convert["RAD"]["DEG"] = 360.0/(2.0*3.1415926);
82 - convert["DEG"]["RAD"] = 1.0/convert["RAD"]["DEG"];
83 - convert["LBS/FT"]["N/M"] = 14.5939;
84 - convert["LBS/FT/SEC"]["N/M/SEC"] = 14.5939;
85 - convert["N/M"]["LBS/FT"] = 1.0/convert["LBS/FT"]["N/M"];
86 - convert["N/M/SEC"]["LBS/FT/SEC"] = 1.0/convert["LBS/FT/SEC"]["N/M/SEC"];
87 - convert["WATTS"]["HP"] = 0.001341022;
88 - convert["HP"]["WATTS"] = 1.0/convert["WATTS"]["HP"];
89 - convert["N"]["LBS"] = 0.22482;
90 - convert["LBS"]["N"] = 1.0/convert["N"]["LBS"];
91 - convert["KTS"]["FT/SEC"] = ktstofps;
92 - convert["KG/MIN"]["LBS/MIN"] = convert["KG"]["LBS"];
93 - convert["LBS/HP*HR"]["KG/KW*HR"] = 0.6083;
94 - convert["KG/KW*HR"]["LBS/HP*HR"] = 1/convert["LBS/HP*HR"]["KG/KW*HR"];
95 - convert["KG/L"]["LBS/GAL"] = 8.3454045;
97 - convert["M"]["M"] = 1.00;
98 - convert["FT"]["FT"] = 1.00;
99 - convert["IN"]["IN"] = 1.00;
100 - convert["DEG"]["DEG"] = 1.00;
101 - convert["RAD"]["RAD"] = 1.00;
102 - convert["M2"]["M2"] = 1.00;
103 - convert["FT2"]["FT2"] = 1.00;
104 - convert["KG*M2"]["KG*M2"] = 1.00;
105 - convert["SLUG*FT2"]["SLUG*FT2"] = 1.00;
106 - convert["KG"]["KG"] = 1.00;
107 - convert["LBS"]["LBS"] = 1.00;
108 - convert["LBS/FT"]["LBS/FT"] = 1.00;
109 - convert["N/M"]["N/M"] = 1.00;
110 - convert["LBS/FT/SEC"]["LBS/FT/SEC"] = 1.00;
111 - convert["N/M/SEC"]["N/M/SEC"] = 1.00;
112 - convert["PSI"]["PSI"] = 1.00;
113 - convert["INHG"]["INHG"] = 1.00;
114 - convert["HP"]["HP"] = 1.00;
115 - convert["N"]["N"] = 1.00;
116 - convert["WATTS"]["WATTS"] = 1.00;
117 - convert["KTS"]["KTS"] = 1.0;
118 - convert["FT/SEC"]["FT/SEC"] = 1.0;
119 - convert["KG/MIN"]["KG/MIN"] = 1.0;
120 - convert["LBS/MIN"]["LBS/MIN"] = 1.0;
121 - convert["LBS/HP*HR"]["LBS/HP*HR"] = 1.0;
122 - convert["KG/KW*HR"]["KG/KW*HR"] = 1.0;
123 - convert["KG/L"]["KG/L"] = 1.0;
124 - convert["LBS/GAL"]["LBS/GAL"] = 1.0;
129 - M2 = meters squared
143 - GAL = gallon (U.S. liquid)
145 @author Jon S. Berndt
149 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
151 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
156 @param nm the name of this element (if given)
162 /** Retrieves an attribute.
163 @param key specifies the attribute key to retrieve the value of.
164 @return the key value (as a string), or the empty string if no such
166 string GetAttributeValue(string key);
168 /** Retrieves an attribute value as a double precision real number.
169 @param key specifies the attribute key to retrieve the value of.
170 @return the key value (as a number), or the HUGE_VAL if no such
172 double GetAttributeValueAsNumber(string key);
174 /** Retrieves the element name.
175 @return the element name, or the empty string if no name has been set.*/
176 string GetName(void) {return name;}
178 /** Gets a line of data belonging to an element.
179 @param i the index of the data line to return (0 by default).
180 @return a string representing the data line requested, or the empty string
182 string GetDataLine(unsigned int i=0);
184 /// Returns the number of lines of data stored
185 unsigned int GetNumDataLines(void) {return (unsigned int)data_lines.size();}
187 /// Returns the number of child elements for this element.
188 unsigned int GetNumElements(void) {return (unsigned int)children.size();}
190 /// Returns the number of named child elements for this element.
191 unsigned int GetNumElements(string);
193 /** Converts the element data to a number.
194 This function attempts to convert the first (and presumably only) line of
195 data "owned" by the element into a real number. If there is not exactly one
196 line of data owned by the element, then HUGE_VAL is returned.
197 @return the numeric value of the data owned by the element.*/
198 double GetDataAsNumber(void);
200 /** Returns a pointer to the element requested by index.
201 This function also resets an internal counter to the index, so that
202 subsequent calls to GetNextElement() will return the following
203 elements sequentially, until the last element is reached. At that point,
204 GetNextElement() will return NULL.
205 @param el the index of the requested element (0 by default)
206 @return a pointer to the Element, or 0 if no valid element exists. */
207 Element* GetElement(unsigned int el=0);
209 /** Returns a pointer to the next element in the list.
210 The function GetElement() must be called first to be sure that this
211 function will return the correct element. The call to GetElement() resets
212 the internal counter to zero. Subsequent calls to GetNextElement() return
213 a pointer to subsequent elements in the list. When the final element is
214 reached, 0 is returned.
215 @return a pointer to the next Element in the sequence, or 0 if no valid
216 Element is present. */
217 Element* GetNextElement(void);
219 /** Returns a pointer to the parent of an element.
220 @return a pointer to the parent Element, or 0 if this is the top level Element. */
221 Element* GetParent(void) {return parent;}
223 /** Searches for a specified element.
224 Finds the first element that matches the supplied string, or simply the first
225 element if no search string is supplied. This function call resets the internal
226 element counter to the first element.
227 @param el the search string (empty string by default).
228 @return a pointer to the first element that matches the supplied search string. */
229 Element* FindElement(string el="");
231 /** Searches for the next element as specified.
232 This function would be called after FindElement() is first called (in order to
233 reset the internal counter). If no argument is supplied (or the empty string)
234 a pointer to the very next element is returned. Otherwise, the next occurence
235 of the named element is returned. If the end of the list is reached, 0 is
237 @param el the name of the next element to find.
238 @return the pointer to the found element, or 0 if no appropriate element us
240 Element* FindNextElement(string el="");
242 /** Searches for the named element and returns the string data belonging to it.
243 This function allows the data belonging to a named element to be returned
244 as a string. If no element is found, the empty string is returned. If no
245 argument is supplied, the data string for the first element is returned.
246 @param el the name of the element being searched for (the empty string by
248 @return the data value for the named element as a string, or the empty
249 string if the element cannot be found. */
250 string FindElementValue(string el="");
252 /** Searches for the named element and returns the data belonging to it as a number.
253 This function allows the data belonging to a named element to be returned
254 as a double. If no element is found, HUGE_VAL is returned. If no
255 argument is supplied, the data for the first element is returned.
256 @param el the name of the element being searched for (the empty string by
258 @return the data value for the named element as a double, or HUGE_VAL if the
260 double FindElementValueAsNumber(string el="");
262 /** Searches for the named element and converts and returns the data belonging to it.
263 This function allows the data belonging to a named element to be returned
264 as a double. If no element is found, HUGE_VAL is returned. If no
265 argument is supplied, the data for the first element is returned. Additionally,
266 this function converts the value from the units specified in the config file (via
267 the UNITS="" attribute in the element definition) to the native units used by
268 JSBSim itself, as specified by the target_units parameter. The currently
269 allowable unit conversions are seen in the source file FGXMLElement.cpp.
270 Also, see above in the main documentation for this class.
271 @param el the name of the element being searched for (the empty string by
273 @param target_units the string representing the native units used by JSBSim
274 to which the value returned will be converted.
275 @return the unit-converted data value for the named element as a double,
276 or HUGE_VAL if the data is missing. */
277 double FindElementValueAsNumberConvertTo(string el, string target_units);
279 /** Searches for the named element and converts and returns the data belonging to it.
280 This function allows the data belonging to a named element to be returned
281 as a double. If no element is found, HUGE_VAL is returned. If no
282 argument is supplied, the data for the first element is returned. Additionally,
283 this function converts the value from the units specified in the supplied_units
284 parameter to the units specified in the target_units parameter. JSBSim itself,
285 as specified by the target_units parameter. The currently allowable unit
286 conversions are seen in the source file FGXMLElement.cpp. Also, see above
287 in the main documentation for this class.
288 @param el the name of the element being searched for (the empty string by
290 @param supplied_units the string representing the units of the value as
291 supplied by the config file.
292 @param target_units the string representing the native units used by JSBSim
293 to which the value returned will be converted.
294 @return the unit-converted data value for the named element as a double,
295 or HUGE_VAL if the data is missing. */
296 double FindElementValueAsNumberConvertFromTo( string el,
297 string supplied_units,
298 string target_units);
300 /** Composes a 3-element column vector for the supplied location or orientation.
301 This function processes a LOCATION or ORIENTATION construct, returning a
302 filled-out 3-element column vector containing the X, Y, Z or ROLL, PITCH,
303 YAW elements found in the supplied element. If one of the mentioned components
304 is not found, that component is set to zero and a warning message is printed.
305 All three elements should be supplied.
306 @param target_units the string representing the native units used by JSBSim
307 to which the value returned will be converted.
308 @return a column vector object built from the LOCATION or ORIENT components. */
309 FGColumnVector3 FindElementTripletConvertTo( string target_units);
311 /** This function sets the value of the parent class attribute to the supplied
313 @param p pointer to the parent Element. */
314 void SetParent(Element* p) {parent = p;}
316 /** Adds a child element to the list of children stored for this element.
317 * @param el Child element to add. */
318 void AddChildElement(Element* el) {children.push_back(el);}
320 /** Stores an attribute belonging to this element.
321 * @param name The string name of the attribute.
322 * @param value The string value of the attribute. */
323 void AddAttribute(string name, string value);
325 /** Stores data belonging to this element.
326 * @param d the data to store. */
327 void AddData(string d);
329 /** Prints the element.
330 * Prints this element and calls the Print routine for child elements.
331 * @param d The tab level. A level corresponds to a single space. */
332 void Print(unsigned int level=0);
336 map <string, string> attributes;
337 vector <string> data_lines;
338 vector <Element*> children;
339 vector <string> attribute_key;
341 unsigned int element_index;
342 typedef map <string, map <string, double> > tMapConvert;
343 static tMapConvert convert;
344 static bool converterIsInitialized;
347 } // namespace JSBSim
349 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%