public static Collection<String> printAsList(
JTree tree, boolean withSelection, @Nullable Condition<String> nodePrintCondition) {
Collection<String> strings = new ArrayList<String>();
Object root = tree.getModel().getRoot();
printImpl(tree, root, strings, 0, withSelection, nodePrintCondition);
return strings;
}
private static void printImpl(
JTree tree,
Object root,
Collection<String> strings,
int level,
boolean withSelection,
@Nullable Condition<String> nodePrintCondition) {
DefaultMutableTreeNode defaultMutableTreeNode = (DefaultMutableTreeNode) root;
final Object userObject = defaultMutableTreeNode.getUserObject();
String nodeText;
if (userObject != null) {
nodeText = toString(userObject, null);
} else {
nodeText = "null";
}
if (nodePrintCondition != null && !nodePrintCondition.value(nodeText)) return;
final StringBuilder buff = new StringBuilder();
StringUtil.repeatSymbol(buff, ' ', level);
final boolean expanded = tree.isExpanded(new TreePath(defaultMutableTreeNode.getPath()));
if (!defaultMutableTreeNode.isLeaf()) {
buff.append(expanded ? "-" : "+");
}
final boolean selected =
tree.getSelectionModel().isPathSelected(new TreePath(defaultMutableTreeNode.getPath()));
if (withSelection && selected) {
buff.append("[");
}
buff.append(nodeText);
if (withSelection && selected) {
buff.append("]");
}
strings.add(buff.toString());
int childCount = tree.getModel().getChildCount(root);
if (expanded) {
for (int i = 0; i < childCount; i++) {
printImpl(
tree,
tree.getModel().getChild(root, i),
strings,
level + 1,
withSelection,
nodePrintCondition);
}
}
}