org.jolokia.converter.json

Class CompositeDataExtractor

java.lang.Object

org.jolokia.converter.json.CompositeDataExtractor

All Implemented Interfaces:

Extractor

public class CompositeDataExtractor
extends Object
implements Extractor

Extractor for CompositeData

Since:

Apr 19, 2009

Author:

roland

Constructor Summary

Constructors

Constructor and Description
CompositeDataExtractor()

Method Summary

Methods

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) Extract an object from pValue.
Class	getType() Type for which this extractor can objects of this type
Object	setObjectValue(StringToObjectConverter pConverter, Object pInner, String pAttribute, Object pValue) If this extractor is able to set a value (see Extractor.canSetValue()), this method sets the value even on an inner object

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositeDataExtractor

public CompositeDataExtractor()

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

Extract an object from pValue. In the simplest case, this is the value itself. For more complex data types, it is converted into a JSON structure if possible (and if 'jsonify' is true). pExtraArgs is not null, this returns only a substructure, specified by the path represented by this stack

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

pPathParts - extra arguments which contain e.g. a path

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 - if the inner path does not exist.

setObjectValue

public Object setObjectValue(StringToObjectConverter pConverter,
                    Object pInner,
                    String pAttribute,
                    Object pValue)
                      throws IllegalAccessException,
                             InvocationTargetException

If this extractor is able to set a value (see Extractor.canSetValue()), this method sets the value even on an inner object

Specified by:

setObjectValue in interface Extractor

Parameters:

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

pInner - object on which to set the value

pAttribute - attribute of the object to set

pValue - the new value to set

Returns:

the old value

Throws:

IllegalAccessException - if the attribute to set to is not accessible

InvocationTargetException - reflection error

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.