// add a new free VirtualMachineImpl class
private static synchronized void addFreeVMImplClass(Class clazz) {
if (DEBUG) {
System.out.println("adding free VirtualMachineImpl class");
}
freeVMClasses.add(new SoftReference(clazz));
}
private static List<String> splitStringAtNonEnclosedWhiteSpace(String value)
throws IllegalArgumentException {
List<String> al = new ArrayList<String>();
char[] arr;
int startPosition = 0;
int endPosition = 0;
final char SPACE = ' ';
final char DOUBLEQ = '"';
final char SINGLEQ = '\'';
/*
* An "open" or "active" enclosing state is where
* the first valid start quote qualifier is found,
* and there is a search in progress for the
* relevant end matching quote
*
* enclosingTargetChar set to SPACE
* is used to signal a non open enclosing state
*/
char enclosingTargetChar = SPACE;
if (value == null) {
throw new IllegalArgumentException(MessageOutput.format("value string is null"));
}
// split parameter string into individual chars
arr = value.toCharArray();
for (int i = 0; i < arr.length; i++) {
switch (arr[i]) {
case SPACE:
{
// do nothing for spaces
// unless last in array
if (isLastChar(arr, i)) {
endPosition = i;
// break for substring creation
break;
}
continue;
}
case DOUBLEQ:
case SINGLEQ:
{
if (enclosingTargetChar == arr[i]) {
// potential match to close open enclosing
if (isNextCharWhitespace(arr, i)) {
// if peek next is whitespace
// then enclosing is a valid substring
endPosition = i;
// reset enclosing target char
enclosingTargetChar = SPACE;
// break for substring creation
break;
}
}
if (enclosingTargetChar == SPACE) {
// no open enclosing state
// handle as normal char
if (isPreviousCharWhitespace(arr, i)) {
startPosition = i;
// peek forward for end candidates
if (value.indexOf(arr[i], i + 1) >= 0) {
// set open enclosing state by
// setting up the target char
enclosingTargetChar = arr[i];
} else {
// no more target chars left to match
// end enclosing, handle as normal char
if (isNextCharWhitespace(arr, i)) {
endPosition = i;
// break for substring creation
break;
}
}
}
}
continue;
}
default:
{
// normal non-space, non-" and non-' chars
if (enclosingTargetChar == SPACE) {
// no open enclosing state
if (isPreviousCharWhitespace(arr, i)) {
// start of space delim substring
startPosition = i;
}
if (isNextCharWhitespace(arr, i)) {
// end of space delim substring
endPosition = i;
// break for substring creation
break;
}
}
continue;
}
}
// break's end up here
if (startPosition > endPosition) {
throw new IllegalArgumentException(MessageOutput.format("Illegal option values"));
}
// extract substring and add to List<String>
al.add(value.substring(startPosition, ++endPosition));
// set new start position
i = startPosition = endPosition;
} // for loop
return al;
}
