/**
* Recursively dumps a byte representation of a subtree onto a stream. Used by stringfor( InspTree
* ). Publicly available in case you want to stringify a subtree and really think this way is less
* work than doing it yourself. You'll want to make sure the "spaces" static variable is
* initialized first :)
*
* @param subtreeRoot root of subtree to represent
* @param pts way to stringify each position
* @param ostream stream on which to represent the subtree
* @param t tree, so children(.) can be called
* @param indentation number of spaces to indent this level
* @param indentation_increment amount by which indentation will be increased before writing
* children
*/
public static void writeNodeAndChildren(
Position subtreeRoot,
PositionToString pts,
DataOutputStream ostream,
InspectableTree t,
int indentation,
int indentation_increment) {
try {
// indent, then write the subtreeRoot
ostream.write(spaces, 0, indentation);
ostream.writeBytes(pts.stringfor(subtreeRoot));
ostream.writeBytes("\n");
} catch (java.io.IOException e) {
System.err.println("\nAn I/O error occurred: " + e);
return;
}
PositionIterator pp = t.children(subtreeRoot);
// recur on all children
while (pp.hasNext())
writeNodeAndChildren(
pp.nextPosition(),
pts,
ostream,
t,
indentation + indentation_increment,
indentation_increment);
}
/**
* Gives string representation of a sequence, parameterized by how to represent each position
* (i.e., constructs a string by iterating over all positions of the sequence, concatenating the
* specified string representation of each position). Iteration is in the natural order for a
* sequence.
*
* @param s sequence to stringify
* @param pts how to stringify each position
* @return the string representation of s
*/
public static String stringfor(InspectableSequence s, PositionToString pts) {
String toReturn = "[";
PositionIterator pp = s.positions();
// first element should have no comma
if (pp.hasNext()) toReturn += " " + pts.stringfor(pp.nextPosition());
while (pp.hasNext()) {
toReturn += ", " + pts.stringfor(pp.nextPosition());
}
toReturn += " ]";
return toReturn;
}