org.jolokia.converter.json

Class MapExtractor

java.lang.Object

org.jolokia.converter.json.MapExtractor

All Implemented Interfaces:

Extractor

public class MapExtractor
extends Object
implements Extractor

Extractor for Maps (which turns Map into JSONObject)

Since:

Apr 19, 2009

Author:

roland

Constructor Summary

Constructors

Constructor and Description
MapExtractor()

Method Summary

Modifier and Type	Method and Description
boolean	canSetValue() Whether this extractor is able to set a value.
Object	extractObject(ObjectToJsonConverter pConverter, Object pValue, Stack<String> pPathParts, boolean jsonify) Convert a Map to JSON (if jsonify is true).
Class	getType() Type for which this extractor can objects of this type
Object	setObjectValue(StringToObjectConverter pConverter, Object pMap, String pKey, Object pValue) Set the value within a map, where the attribute is taken as key into the map.

Methods inherited from class java.lang.Object

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

Constructor Detail

MapExtractor

public MapExtractor()

Method Detail

getType

public Class getType()

Type for which this extractor can objects of this type

Specified by:

getType in interface Extractor

Returns:

type which can be handled

extractObject

public Object extractObject(ObjectToJsonConverter pConverter,
                            Object pValue,
                            Stack<String> pPathParts,
                            boolean jsonify)
                     throws AttributeNotFoundException

Convert a Map to JSON (if jsonify is true). If a path is used, the path is interpreted as a key into the map. The key in the path is a string and is compared agains all keys in the map against their string representation.

Specified by:

extractObject in interface Extractor

Parameters:

pConverter - the global converter in order to be able do dispatch for serializing inner data types

pValue - the value to convert which must be a Map

pPathParts - extra argument stack which on top must be a key into the map

jsonify - whether to convert to a JSON object/list or whether the plain object should be returned. The later is required for writing an inner value

Returns:

the extracted object

Throws:

AttributeNotFoundException

setObjectValue

public Object setObjectValue(StringToObjectConverter pConverter,
                             Object pMap,
                             String pKey,
                             Object pValue)
                      throws IllegalAccessException,
                             InvocationTargetException

Set the value within a map, where the attribute is taken as key into the map.

Specified by:

setObjectValue in interface Extractor

Parameters:

pConverter - the global converter in order to be able do dispatch for serializing inner data types

pMap - map on which to set the value

pKey - key in the map where to put the value

pValue - the new value to set

Returns:

the old value or null if a new map entry was created/

Throws:

IllegalAccessException

InvocationTargetException

canSetValue

public boolean canSetValue()

Whether this extractor is able to set a value.

Specified by:

canSetValue in interface Extractor

Returns:

true if this extractor can set a value, false otherwise.