net.sf.json.util
Class CycleDetectionStrategy

java.lang.Object
  net.sf.json.util.CycleDetectionStrategy

public abstract class CycleDetectionStrategy
extends Object

Base class for cycle detection in a hierarchy.
The JSON spec forbides cycles in a hierarchy and most parsers will raise and error when a cycle is detected. This class defines a contract for handling those cycles and two base implementations:

• STRICT - will throw a JSONException if a cycle is found.
• LENIENT - will return an empty array or null object if a cycle is found.

Author:

Andres Almiray

Field Summary

static JSONArray	IGNORE_PROPERTY_ARR
static JSONObject	IGNORE_PROPERTY_OBJ
static CycleDetectionStrategy	LENIENT Returns empty array and null object
static CycleDetectionStrategy	NOPROP Returns a special object (IGNORE_PROPERTY_OBJ) that indicates the entire property should be ignored
static CycleDetectionStrategy	STRICT Throws a JSONException

Constructor Summary

CycleDetectionStrategy()

Method Summary

abstract JSONArray	handleRepeatedReferenceAsArray(Object reference) Handle a repeated reference Must return a valid JSONArray or null.
abstract JSONObject	handleRepeatedReferenceAsObject(Object reference) Handle a repeated reference Must return a valid JSONObject or null.

Methods inherited from class java.lang.Object

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

Field Detail

IGNORE_PROPERTY_ARR

public static final JSONArray IGNORE_PROPERTY_ARR

IGNORE_PROPERTY_OBJ

public static final JSONObject IGNORE_PROPERTY_OBJ

LENIENT

public static final CycleDetectionStrategy LENIENT

Returns empty array and null object

NOPROP

public static final CycleDetectionStrategy NOPROP

Returns a special object (IGNORE_PROPERTY_OBJ) that indicates the entire property should be ignored

STRICT

public static final CycleDetectionStrategy STRICT

Throws a JSONException

Constructor Detail

CycleDetectionStrategy

public CycleDetectionStrategy()

Method Detail

handleRepeatedReferenceAsArray

public abstract JSONArray handleRepeatedReferenceAsArray(Object reference)

Handle a repeated reference
Must return a valid JSONArray or null.

Parameters:

reference - the repeated reference.

handleRepeatedReferenceAsObject

public abstract JSONObject handleRepeatedReferenceAsObject(Object reference)

Handle a repeated reference
Must return a valid JSONObject or null.

Parameters:

reference - the repeated reference.