public String PPrint(int indent, boolean recursive) {
String output = new String();
if (children.size() == 0) {
output += doIndent(indent) + "<" + label + "/>\n";
} else {
output += doIndent(indent) + "<" + label + ">\n";
indent += 2;
if (recursive) {
for (int i = 0; i < children.size(); i++) {
Walkable w = (Walkable) children.elementAt(i);
output += w.PPrint(indent, true);
}
} else {
for (int i = 0; i < children.size(); i++) {
Walkable w = (Walkable) children.elementAt(i);
output += doIndent(indent) + "<" + w.getNodeName() + "/>\n";
}
}
indent -= 2;
output += doIndent(indent) + "</" + label + ">\n";
}
return output;
}
public ParseNodeVector getChildren(String label) {
int i;
ParseNodeVector v = new ParseNodeVector();
for (i = 0; i < children.size(); i++) {
ParseNode pn = children.elementAt(i);
if (pn.getLabel().equals(label)) v.addElement(pn);
}
return v;
}
public ParseNode getChild(String label) {
int i;
ParseNode p;
for (i = 0; i < children.size(); i++) {
p = children.elementAt(i);
if (p.getLabel().equals(label)) {
return p;
}
}
return null;
}
public ParseNode addChild(String newlabel) {
ParseNode child = new ParseNode(newlabel, -1);
children.addElement(child);
child.setParent(this);
return child;
}
public ParseNode addChild(ParseNode child) {
if (child == null) throw new NullPointerException("Can't add null node to parse tree");
children.addElement(child);
child.setParent(this);
return child;
}
public String getTerminal() {
ParseNode pn = children.elementAt(0);
if (pn == null) {
return null;
} else {
return pn.getLabel();
}
}
public ParseNode insertChild(ParseNode child) {
if (child == null) {
throw new NullPointerException("Can't add null node to parse tree");
}
children.insertElementAt(child, 0);
child.setParent(this);
return child;
}
public Object getNeighbor(int index) {
return children.elementAt(index);
}
public int getNeighborCount() {
return children.size();
}