public void nodeSelectionChanged()

in zookeeper-contrib/zookeeper-contrib-zooinspector/src/main/java/org/apache/zookeeper/inspector/gui/nodeviewer/NodeViewerMetaData.java [81:185]
102 lines of code
7 McCabe index (conditional complexity)

    public void nodeSelectionChanged(List<String> selectedNodes) {
        this.metaDataPanel.removeAll();
        if (selectedNodes.size() > 0) {
            this.selectedNode = selectedNodes.get(0);
            SwingWorker<Map<String, String>, Void> worker = new SwingWorker<Map<String, String>, Void>() {

                @Override
                protected Map<String, String> doInBackground() throws Exception {
                    return NodeViewerMetaData.this.zooInspectorManager
                            .getNodeMeta(NodeViewerMetaData.this.selectedNode);
                }

                @Override
                protected void done() {
                    Map<String, String> data = null;
                    try {
                        data = get();
                    } catch (InterruptedException e) {
                        data = new HashMap<String, String>();
                        LoggerFactory.getLogger().error(
                                "Error retrieving meta data for node: "
                                        + NodeViewerMetaData.this.selectedNode,
                                e);
                    } catch (ExecutionException e) {
                        data = new HashMap<String, String>();
                        LoggerFactory.getLogger().error(
                                "Error retrieving meta data for node: "
                                        + NodeViewerMetaData.this.selectedNode,
                                e);
                    }
                    NodeViewerMetaData.this.metaDataPanel
                            .setLayout(new GridBagLayout());
                    JPanel infoPanel = new JPanel();
                    infoPanel.setBackground(Color.WHITE);
                    infoPanel.setLayout(new GridBagLayout());
                    int i = 0;
                    int rowPos = 0;
                    for (Map.Entry<String, String> entry : data.entrySet()) {
                        rowPos = 2 * i + 1;
                        JLabel label = new JLabel(entry.getKey());
                        JTextField text = new JTextField(formatValByKeyType(entry.getKey(),entry.getValue()));
                        text.setEditable(false);
                        GridBagConstraints c1 = new GridBagConstraints();
                        c1.gridx = 0;
                        c1.gridy = rowPos;
                        c1.gridwidth = 1;
                        c1.gridheight = 1;
                        c1.weightx = 0;
                        c1.weighty = 0;
                        c1.anchor = GridBagConstraints.WEST;
                        c1.fill = GridBagConstraints.HORIZONTAL;
                        c1.insets = new Insets(5, 5, 5, 5);
                        c1.ipadx = 0;
                        c1.ipady = 0;
                        infoPanel.add(label, c1);
                        GridBagConstraints c2 = new GridBagConstraints();
                        c2.gridx = 2;
                        c2.gridy = rowPos;
                        c2.gridwidth = 1;
                        c2.gridheight = 1;
                        c2.weightx = 0;
                        c2.weighty = 0;
                        c2.anchor = GridBagConstraints.WEST;
                        c2.fill = GridBagConstraints.HORIZONTAL;
                        c2.insets = new Insets(5, 5, 5, 5);
                        c2.ipadx = 0;
                        c2.ipady = 0;
                        infoPanel.add(text, c2);
                        i++;
                    }
                    GridBagConstraints c = new GridBagConstraints();
                    c.gridx = 1;
                    c.gridy = rowPos;
                    c.gridwidth = 1;
                    c.gridheight = 1;
                    c.weightx = 1;
                    c.weighty = 1;
                    c.anchor = GridBagConstraints.NORTHWEST;
                    c.fill = GridBagConstraints.NONE;
                    c.insets = new Insets(5, 5, 5, 5);
                    c.ipadx = 0;
                    c.ipady = 0;
                    NodeViewerMetaData.this.metaDataPanel.add(infoPanel, c);
                    NodeViewerMetaData.this.metaDataPanel.revalidate();
                    NodeViewerMetaData.this.metaDataPanel.repaint();
                }

                private String formatValByKeyType(String key, String value) {
                    if(key==null) return value;
                    String formattedVal=value;
                    switch (key){
                        case "Ephemeral Owner":
                            try{
                                formattedVal = String.format("0x%x", Long.parseLong(value));
                            }catch (NumberFormatException e){
                                LoggerFactory.getLogger().warn("parse {}'s value {} to hex fail",key,value,e);
                            }
                            break;
                    }
                    return formattedVal;
                }
            };
            worker.execute();
        }
    }