| joelg236 |
05-06-2012 16:50 |
Preferences check if the element exists
Hi CD,
I am working on some code to interface with the preferences class that is accessible in SmartDashboard. Unfortunately, I don't know how to figure this part out.
Code:
/**
* Gets the integer from preferences.
*
* @param ID ID of the integer
* @param backupValue The value to return in preferences does not contain it
* @param replace If the backup value has to be used, should the value be inserted?
* @return Returns the integer saved in preferences
*/
public static int getInt(String ID, int backupValue, boolean replace) {
int backup = backupValue;
try {
if(m_data.elementAt(m_names.indexOf(ID)) != null) {
backup = ((Integer)m_data.elementAt(m_names.indexOf(ID))).intValue();
// Checks to see if my code has the element stored^^^
}
}
catch(ClassCastException ex) {}
catch(ArrayIndexOutOfBoundsException ex) {}
//These exceptions are okay to catch because my code might not store it already
if (Preferences.getInstance().getInt(ID, backup) == backup && replace) {
// This is where I have a problem. I can check if its the same as backup -
//which will happen when it goes to the backup value yes, which does its
//purpose. But for optimization, everytime the field is actually the backup
//(No matter if it exists or not), it will save the value. That takes up
//bandwidth and slows the code down. NOT what I want to do, especially
//because a lot of the values will be the same as backup.
Preferences.getInstance().putInt(ID, backup);
save();
}
return Preferences.getInstance().getInt(ID, backup);
}
I wrote the problem in the code in comments, just in case you didn't notice it. :) |
