/**
* Determines and stores the network sites to test for public network connectivity. The sites are drawn from the
* JVM's SharpEarth.avkey.NetworkStatusTestSites property ({@link AVKey#NETWORK_STATUS_TEST_SITES}). If that
* property is not defined, the sites are drawn from the same property in the World Wind or application
* configuration file. If the sites are not specified there, the set of sites specified in {@link
* #DEFAULT_NETWORK_TEST_SITES} are used. To indicate an empty list in the JVM property or configuration file
* property, specify an empty site list, "".
*/
protected void establishNetworkTestSites()
{
String testSites = System.getProperty(AVKey.NETWORK_STATUS_TEST_SITES);
if (testSites == null)
{
testSites = Configuration.getStringValue(AVKey.NETWORK_STATUS_TEST_SITES);
}
if (testSites == null)
{
this.networkTestSites.addAll(Arrays.asList(DEFAULT_NETWORK_TEST_SITES));
}
else
{
String[] sites = testSites.split(",");
List <String> actualSites = new ArrayList <String>(sites.length);
for (int i = 0; i < sites.length; i++)
{
String site = WWUtil.removeWhiteSpace(sites[i]);
if (!WWUtil.isEmpty(site))
{
actualSites.add(site);
}
}
this.setNetworkTestSites(actualSites);
}
}
/**
* Parses a string to a double value if the string can be parsed as a double. Does not log a message if the string
* can not be parsed as a double.
*
* @param s the string to parse.
*
* @return the double value parsed from the string, or null if the string cannot be parsed as a double.
*/
public static Double makeDouble(String s)
{
if (WWUtil.isEmpty(s))
{
return(null);
}
try
{
return(Double.valueOf(s));
}
catch (NumberFormatException e)
{
return(null);
}
}
/**
* Parses a string to a double value using the current locale if the string can be parsed as a double. Does not log
* a message if the string can not be parsed as a double.
*
* @param s the string to parse.
*
* @return the double value parsed from the string, or null if the string cannot be parsed as a double.
*/
public static Double makeDoubleForLocale(String s)
{
if (WWUtil.isEmpty(s))
{
return(null);
}
try
{
return(NumberFormat.getInstance().parse(s.trim()).doubleValue());
}
catch (ParseException e)
{
return(null);
}
}
/**
* Parses a string to a long value if the string can be parsed as a long. Does not log a message if the string can
* not be parsed as a long.
*
* @param s the string to parse.
*
* @return the long value parsed from the string, or null if the string cannot be parsed as a long.
*/
public static Long makeLong(String s)
{
if (WWUtil.isEmpty(s))
{
return(null);
}
try
{
return(Long.valueOf(s));
}
catch (NumberFormatException e)
{
return(null);
}
}
/**
* Parses a string to an integer value if the string can be parsed as a integer. Does not log a message if the
* string can not be parsed as an integer.
*
* @param s the string to parse.
*
* @return the integer value parsed from the string, or null if the string cannot be parsed as an integer.
*/
public static Integer makeInteger(String s)
{
if (WWUtil.isEmpty(s))
{
return(null);
}
try
{
return(Integer.valueOf(s));
}
catch (NumberFormatException e)
{
return(null);
}
}