Java JTree Path getTree(List paths)

Description

constract tree from list of paths.

License

Open Source License

Parameter

Parameter	Description
paths	the paths

Return

the tree

Declaration

public static TreeNode getTree(List<TreePath> paths) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.LinkedHashMap;

import java.util.List;
import java.util.Map;

import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

public class Main {
    /**//w w w  . ja  v  a2  s  . c o m
     * constract tree from list of paths.
     *
     * @param paths the paths
     * @return the tree
     */
    public static TreeNode getTree(List<TreePath> paths) {
        return getTree(paths, null);
    }

    /**
     * constract tree from list of paths.
     *
     * @param paths the paths
     * @param root the root
     * @return the tree
     */
    public static TreeNode getTree(List<TreePath> paths, String root) {
        // check for empty list
        if (paths == null || paths.isEmpty())
            return null; //new DefaultMutableTreeNode("EMPTY");

        // iterate over paths
        Map<String, DefaultMutableTreeNode> map = new LinkedHashMap<String, DefaultMutableTreeNode>();
        for (TreePath path : paths) {
            DefaultMutableTreeNode parent = null;
            for (Object n : path.getPath()) {
                DefaultMutableTreeNode node = map.get("" + n);
                if (node == null) {
                    node = new DefaultMutableTreeNode("" + n);
                    map.put("" + n, node);
                }
                // add as child to parent
                if (parent != null)
                    parent.add(node);
                parent = node;
            }
        }
        // the root should be the very first entry in linked table
        return (map.containsKey(root)) ? map.get(root) : map.get(map
                .keySet().iterator().next());
    }
}

Related

1. getPath(TreeNode treeNode)
2. getPath(TreeNode treeNode)
3. getPath(TreeNode treeNode)
4. getPath(TreeNode treeNode)
5. getPathStr(TreeNode[] projectNodes)
6. getTreePath(TreeNode treeNode)
7. getTreePath(TreeNode treeNode)
8. getTreePath(TreePath path, JTree tree, boolean compareOnlyLabels)
9. getTreePathString(TreePath path)