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// Copyright 2008 Nanorex, Inc. See LICENSE file for details.
#include "Nanorex/Utility/NXProperties.h"
namespace Nanorex {
/* CONSTRUCTOR */
/**
* Constructs an empty NXProperties object.
*/
NXProperties::NXProperties() {
}
/* DESTRUCTOR */
NXProperties::~NXProperties() {
}
/* FUNCTION: writeToFile */
/**
* Writes these properties to the given file. The format of the file is as
* follows:
*
\code
key1=value1
key2=value2
...
\endcode
*
* @return If the given file was successfully opened and completely written, an
* empty string ("") is returned. Otherwise, an error message is returned.
*/
std::string NXProperties::writeToFile(const std::string& filename) {
std::string errors = "";
// Open file for reading.
std::ofstream outFile(filename.c_str(), std::ios::out);
if (!outFile) {
errors = "File could not be opened: " + filename + ".";
} else {
std::string line;
std::map<std::string, std::string>::iterator iter;
for (iter = properties.begin(); iter != properties.end(); iter++) {
line = iter->first;
line += "=";
line += iter->second;
outFile << line << std::endl;
}
outFile.close();
}
return errors;
}
/* FUNCTION: readFromFile */
/**
* Opens the given file and reads in the properties it contains. The format
* of the file is as follows:
*
\code
# Comment
key1=value1
key2=value2
...
\endcode
*
* Comments and blank lines are ignored as are white space around keys and
* values.
*
* @return If the given file was successfully opened and completely read, an
* empty string ("") is returned. Otherwise, an error message is returned if
* any line in the input file is malformed. The whole file is read and parsed
* and all good/well-formed lines are incorporated into this set of properties.
*/
std::string NXProperties::readFromFile(const std::string& filename) {
std::string errors = "";
// Open file for reading.
std::ifstream inFile(filename.c_str(), std::ios::in);
if (!inFile) {
errors = "File could not be opened: " + filename + ".";
} else {
// Read properties.
std::string line;
while (std::getline(inFile, line, '\n')) {
try {
deSerializeLine(line);
} catch (...) {
errors += " Bad line: " + line;
}
}
inFile.close();
}
return errors;
}
/* FUNCTION: setProperty */
/**
* Sets the given key's value.
*/
void NXProperties::setProperty(const std::string& key,
const std::string& value) {
properties[key] = value;
}
/* FUNCTION; addProperties */
/**
* Adds the given Properties to this Properties object, prepending the key of
* each new key/value pair with the given string. Any existing properties will
* be over-ridden by those found in the new Properties.
*
* @param newProps
* The new key/value pairs to add.
* @param prePendChars
* The string to prepend to each new key/value pair's key.
*/
void NXProperties::addProperties(NXProperties* newProps,
const char* prePendChars) {
std::string prePendString = std::string(prePendChars);
std::map<std::string, std::string>::iterator newPropsIter;
for (newPropsIter = newProps->properties.begin();
newPropsIter != newProps->properties.end();
newPropsIter++) {
properties[prePendString + newPropsIter->first] = newPropsIter->second;
}
}
/* FUNCTION: keyExists */
bool NXProperties::keyExists(const char* key) {
return (properties.count(key) != 0);
}
/* FUNCTION: getProperty */
/**
* Returns the value of the given key, or an empty string if the key is not
* found.
*/
const char* NXProperties::getProperty(const char* key) {
const char* value = properties[std::string(key)].c_str();
return value;
}
/**
* Returns the value of the given key, or an empty string if the key is not
* found.
*/
const char* NXProperties::getProperty(const std::string& key) {
const char* value = properties[key].c_str();
return value;
}
/**
* Returns the value of the given key with an optional default value if the key
* is not found.
*/
const char* NXProperties::getProperty(const char* key,
const char* defaultValue) {
if (properties.count(key) == 0)
return defaultValue;
else
return getProperty(key);
}
/**
* Returns the value of the given key with an optional default value if the key
* is not found.
*/
const char* NXProperties::getProperty(const std::string& key,
const char* defaultValue) {
if (properties.count(key) == 0)
return defaultValue;
else
return getProperty(key);
}
/* FUNCTION: getPropertyKeys */
/**
* Returns all the keys in a vector.
*/
std::vector<std::string> NXProperties::getPropertyKeys() {
std::vector<std::string> keys;
std::map<std::string, std::string>::iterator iter = properties.begin();
std::map<std::string, std::string>::iterator iterEnd = properties.end();
while (iter != iterEnd) {
keys.push_back(iter->first);
iter++;
}
return keys;
}
/* FUNCTION: clear */
/**
* Clears all properties.
*/
void NXProperties::clear() {
properties.clear();
}
/* FUNCTION: deSerializeLine */
void NXProperties::deSerializeLine(const std::string& dataLine) {
std::string key, value;
std::string line = dataLine;
// Trim front.
while ((line.length() != 0) && (line[0] == ' '))
line.erase(0, 1);
// Ignore commented and blank lines
if ((line.length() == 0) || (line[0] == '#'))
return;
// Get key/value pair
unsigned int index = line.find("=", 1);
if (index != std::string::npos) {
key = line.substr(0, index);
// Trim end.
while ((key.length() != 0) && (key[key.length() - 1] == ' '))
key.erase(key.length() - 1, 1);
value = line.substr(index + 1, line.length() - 1);
//Trim front.
while ((value.length() != 0) && (value[0] == ' '))
value.erase(0, 1);
// Trim end.
while ((value.length() != 0) && (value[value.length() - 1] == ' '))
value.erase(value.length() - 1, 1);
// Add to table
properties[key] = value;
}
}
} // Nanorex::
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