org.apache.nifi.processors.ccda

Class ExtractCCDAAttributes

java.lang.Object

org.apache.nifi.components.AbstractConfigurableComponent

org.apache.nifi.processor.AbstractSessionFactoryProcessor

org.apache.nifi.processor.AbstractProcessor

org.apache.nifi.processors.ccda.ExtractCCDAAttributes

All Implemented Interfaces:

ConfigurableComponent, Processor

@SideEffectFree
 @SupportsBatching
 @InputRequirement(value=INPUT_REQUIRED)
 @Tags(value={"CCDA","healthcare","extract","attributes"})
 @CapabilityDescription(value="Extracts information from an Consolidated CDA formatted FlowFile and provides individual attributes as FlowFile attributes. The attributes are named as <Parent> <dot> <Key>. If the Parent is repeating, the naming will be <Parent> <underscore> <Parent Index> <dot> <Key>. For example, section.act_07.observation.name=Essential hypertension")
public class ExtractCCDAAttributes
extends AbstractProcessor

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	ExtractCCDAAttributes.CDAValidationHandler

Field Summary

Fields

Modifier and Type	Field and Description
private static char	FIELD_SEPARATOR
private org.apache.commons.jexl3.JexlEngine	jexl
private org.apache.commons.jexl3.JexlContext	jexlCtx
private static char	KEY_VALUE_SEPARATOR
private Map<String,Map<String,String>>	processMap
private List<PropertyDescriptor>	properties
static Relationship	REL_FAILURE REL_FAILURE - Value to be returned in case the processor fails
static Relationship	REL_SUCCESS REL_SUCCESS - Value to be returned in case the processor succeeds
private Set<Relationship>	relationships
static PropertyDescriptor	SKIP_VALIDATION SKIP_VALIDATION - Indicates whether to validate the CDA document after loading.

Constructor Summary

Constructors

Constructor and Description
ExtractCCDAAttributes()

Method Summary

Modifier and Type	Method and Description
protected Map<String,String>	addElement(Map<String,Object> map, String prefix, String key, Object value, Map<String,String> attributes) Adds element to the attribute list based on the type
Set<Relationship>	getRelationships()
protected List<PropertyDescriptor>	getSupportedPropertyDescriptors()
protected void	init(ProcessorInitializationContext context)
protected org.openhealthtools.mdht.uml.cda.ClinicalDocument	loadDocument(InputStream inputStream, Boolean skipValidation)
protected void	loadMappings()
void	onScheduled(ProcessContext context)
void	onTrigger(ProcessContext context, ProcessSession session)
protected Map<String,Object>	processElement(String parent, Object element, Map<String,String> attributes) Process elements children based on the parser mapping.
protected List<Object>	processList(String key, List value, Map<String,String> attributes) Iterate through the list and calls processElement to process each element

Methods inherited from class org.apache.nifi.processor.AbstractProcessor

onTrigger

Methods inherited from class org.apache.nifi.processor.AbstractSessionFactoryProcessor

getControllerServiceLookup, getIdentifier, getLogger, getNodeTypeProvider, initialize, isConfigurationRestored, isScheduled, toString, updateConfiguredRestoredTrue, updateScheduledFalse, updateScheduledTrue

Methods inherited from class org.apache.nifi.components.AbstractConfigurableComponent

customValidate, equals, getPropertyDescriptor, getPropertyDescriptors, getSupportedDynamicPropertyDescriptor, hashCode, onPropertyModified, validate

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.nifi.components.ConfigurableComponent

getPropertyDescriptor, getPropertyDescriptors, onPropertyModified, validate

Field Detail

FIELD_SEPARATOR

private static final char FIELD_SEPARATOR

See Also:

Constant Field Values

KEY_VALUE_SEPARATOR

private static final char KEY_VALUE_SEPARATOR

See Also:

Constant Field Values

processMap

private Map<String,Map<String,String>> processMap

jexl

private org.apache.commons.jexl3.JexlEngine jexl

jexlCtx

private org.apache.commons.jexl3.JexlContext jexlCtx

properties

private List<PropertyDescriptor> properties

relationships

private Set<Relationship> relationships

SKIP_VALIDATION

public static final PropertyDescriptor SKIP_VALIDATION

SKIP_VALIDATION - Indicates whether to validate the CDA document after loading. if true and the document is not valid, then ProcessException will be thrown

REL_SUCCESS

public static final Relationship REL_SUCCESS

REL_SUCCESS - Value to be returned in case the processor succeeds

REL_FAILURE

public static final Relationship REL_FAILURE

REL_FAILURE - Value to be returned in case the processor fails

Constructor Detail

ExtractCCDAAttributes

public ExtractCCDAAttributes()

Method Detail

getSupportedPropertyDescriptors

protected List<PropertyDescriptor> getSupportedPropertyDescriptors()

Overrides:

getSupportedPropertyDescriptors in class AbstractConfigurableComponent

getRelationships

public Set<Relationship> getRelationships()

Specified by:

getRelationships in interface Processor

Overrides:

getRelationships in class AbstractSessionFactoryProcessor

init

protected void init(ProcessorInitializationContext context)

Overrides:

init in class AbstractSessionFactoryProcessor

onScheduled

@OnScheduled
public void onScheduled(ProcessContext context)
                              throws IOException

Throws:

IOException

onTrigger

public void onTrigger(ProcessContext context,
                      ProcessSession session)

Specified by:

onTrigger in class AbstractProcessor

processElement

protected Map<String,Object> processElement(String parent,
                                            Object element,
                                            Map<String,String> attributes)

Process elements children based on the parser mapping. Any String values are added to attributes For List, the processList method is called to iterate and process For an Object this method is called recursively While adding to the attributes the key is prefixed by parent

Parameters:

parent - parent key for this element, used as a prefix for attribute key

element - element to be processed

attributes - map of attributes to populate

Returns:

map of processed data, value can contain String or Map of Strings

addElement

protected Map<String,String> addElement(Map<String,Object> map,
                                        String prefix,
                                        String key,
                                        Object value,
                                        Map<String,String> attributes)

Adds element to the attribute list based on the type

Parameters:

map - object map

prefix - parent key as prefix

key - element key

value - element value

processList

protected List<Object> processList(String key,
                                   List value,
                                   Map<String,String> attributes)

Iterate through the list and calls processElement to process each element

Parameters:

key - key used while calling processElement

value - value is the individual Object being processed

attributes - map of attributes to populate

Returns:

list of elements

loadDocument

protected org.openhealthtools.mdht.uml.cda.ClinicalDocument loadDocument(InputStream inputStream,
                                                                         Boolean skipValidation)

loadMappings

protected void loadMappings()