@Override
public void startElement(String uri, String localName, String name, Attributes atts)
throws SAXException {
super.startElement(uri, localName, name, atts);
if (delta < -1) {
super.characters(LINE_SEPARATOR, 0, LINE_SEPARATOR.length);
for (int i = 0; i < level; ++i) {
super.characters(new char[] {'\t'}, 0, 1);
}
delta = 0;
}
delta += 1;
level += 1;
indent = true;
}
/**
* Print characters if they have other content than spaces, newlines, or tabs and put them on a
* new, indented line if they are from another element than the characters printed before.
*/
@Override
public void characters(char[] ch, int start, int length) throws SAXException {
boolean content = false;
for (int i = start + length - 1; i >= start; --i) {
if (ch[i] != ' ' && ch[i] != '\n' && ch[i] != '\t' && ch[i] != '\r') {
content = true;
break;
}
}
if (content) {
if (indent) {
super.characters(LINE_SEPARATOR, 0, LINE_SEPARATOR.length);
for (int i = 0; i < level; ++i) {
super.characters(new char[] {'\t'}, 0, 1);
}
indent = false;
}
super.characters(ch, start, length);
}
}
@Override
public void endDocument() throws SAXException {
super.endDocument();
super.characters(LINE_SEPARATOR, 0, LINE_SEPARATOR.length);
}