Package edu.cnu.mdi.json

Class JsonNodeData

java.lang.Object

edu.cnu.mdi.json.JsonNodeData

public final class JsonNodeData
extends Object

Immutable value object carried as the user-object of every DefaultMutableTreeNode in the JSON tree.

Purpose

Rather than encoding type information in the label string and re-parsing it in the renderer, each node carries an explicit JsonNodeData.Kind tag. This lets JsonTreeCellRenderer select colors in a single switch without any string analysis.

Label format

toString() returns the string that JsonTreeCellRenderer passes to the underlying label. The format is:

• Leaf nodes with a key — key: value (e.g. name: "Alice", count: 42)
• Non-leaf key/index nodes — key summary (e.g. address {3 keys}, [0] [2 items])
• Root node — the file name
• Top-level primitives (no key) — the value string alone

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	JsonNodeData.Kind	Classifies a JSON tree node for color selection in JsonTreeCellRenderer.

Field Summary

Fields

Modifier and Type	Field	Description
final String	key	The key or array index label.
final JsonNodeData.Kind	kind	The token kind, used by JsonTreeCellRenderer to pick a color without re-parsing the label.
final String	value	The value string for leaf nodes, or a size summary (e.g.

Constructor Summary

Constructors

Constructor	Description
JsonNodeData(String key, String value, JsonNodeData.Kind kind)	Create a JsonNodeData.

Method Summary

Modifier and Type	Method	Description
String	toString()	Returns the display string used by JsonTreeCellRenderer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

key

public final String key

The key or array index label.

Empty for top-level primitive nodes that have no enclosing key.

value

public final String value

The value string for leaf nodes, or a size summary (e.g. {3 keys}) for non-leaf key/index nodes.

Empty for the root node.

kind

public final JsonNodeData.Kind kind

The token kind, used by JsonTreeCellRenderer to pick a color without re-parsing the label.

Constructor Details

JsonNodeData

public JsonNodeData(String key,
 String value,
 JsonNodeData.Kind kind)

Create a JsonNodeData.

Parameters:

key - key or array index; may be empty but not null

value - value string or size summary; may be empty but not null

kind - token kind; must not be null

Method Details

toString

public String toString()

Returns the display string used by JsonTreeCellRenderer.

• Root: just the key (the file name).
• No key (top-level primitive): just the value.
• Otherwise: "key: value" for leaves or "key summary" for non-leaf keys.

Overrides:

toString in class Object

Returns:

the display string for this node