Package org.jolokia.service.serializer.json

Class MapAccessor

java.lang.Object

org.jolokia.service.serializer.json.MapAccessor

All Implemented Interfaces:

ObjectAccessor

public class MapAccessor
extends Object
implements ObjectAccessor

ObjectAccessor for maps.

Since:

Apr 19, 2009

Author:

roland

Constructor Summary

Constructors

Constructor	Description
MapAccessor()

Method Summary

Modifier and Type	Method	Description
boolean	canSetValue()	Whether this accessor can be used to set a value inside (directly or nested) a value of given class.
Object	extractObject(ObjectToJsonConverter pConverter, Object pMap, Deque<String> pPathParts, boolean pJsonify)	Convert a Map to JSONObject (if pJsonify is true).
Class<?>	getType()	Gets a class of supported objects.
Object	setObjectValue(Converter<String> 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

Methods inherited from interface org.jolokia.service.serializer.json.ObjectAccessor

extractString, supportsStringConversion

Constructor Details

MapAccessor

public MapAccessor()

Method Details

getType

public Class<?> getType()

Description copied from interface: ObjectAccessor

Gets a class of supported objects.

Specified by:

getType in interface ObjectAccessor

Returns:

supported type of the objects handled by this accessor

extractObject

public Object extractObject(ObjectToJsonConverter pConverter,
 Object pMap,
 Deque<String> pPathParts,
 boolean pJsonify)
                     throws AttributeNotFoundException

Convert a Map to JSONObject (if pJsonify is true). If a path is used, the first element of the path is interpreted as a key into the map and the extracted object is converted value under that key. If the first element is null, new map is returned, possibly with values extracted from existing values using the remainder of the path stack.

Specified by:

extractObject in interface ObjectAccessor

Parameters:

pConverter - the global converter to convert inner values and get serialization options

pMap - the value to convert (must be a Map)

pPathParts - if not empty, top value may be an index into the list and remaining parts are passed recursively

pJsonify - whether to convert the map into a JSONObject or its element to a relevant JSON representation

Returns:

the extracted object or entire map when the pPathParts stack is empty

Throws:

AttributeNotFoundException

canSetValue

public boolean canSetValue()

Description copied from interface: ObjectAccessor

Whether this accessor can be used to set a value inside (directly or nested) a value of given class.

Specified by:

canSetValue in interface ObjectAccessor

Returns:

true if this extractor can be used to set inner values.

setObjectValue

public Object setObjectValue(Converter<String> 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 ObjectAccessor

Parameters:

pConverter - the global converter to convert the value being set into a class of the map value

pMap - a Map to set the value into

pKey - key in the map where to put the value, which is tricky, as the map keys may not be strings

pValue - the new value to set, subject to conversion

Returns:

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

Throws:

IllegalAccessException

InvocationTargetException