Package org.dspace.importer.external.metadatamapping.contributor

Class ConditionEqualJsonPathMetadataContributor

java.lang.Object

org.dspace.importer.external.metadatamapping.contributor.SimpleJsonPathMetadataContributor

org.dspace.importer.external.metadatamapping.contributor.ConditionEqualJsonPathMetadataContributor

All Implemented Interfaces:

MetadataContributor<String>

public class ConditionEqualJsonPathMetadataContributor
extends SimpleJsonPathMetadataContributor

A metadata contributor that extracts a value from JSON using a JsonPathMetadataProcessor and compares it against a predefined right operand. If the extracted value matches the right operand, the specified SimpleJsonPathMetadataContributor is used to extract additional metadata. Otherwise, an empty collection is returned. This class extends SimpleJsonPathMetadataContributor and allows conditional metadata extraction based on JSON path processing.

Author:

Adamo Fapohunda (adamo.fapohunda at 4science.com)

Field Summary

Fields inherited from class org.dspace.importer.external.metadatamapping.contributor.SimpleJsonPathMetadataContributor

metadataProcessor

Constructor Summary

Constructors

Constructor	Description
ConditionEqualJsonPathMetadataContributor()

Method Summary

Modifier and Type	Method	Description
Collection<MetadatumDTO>	contributeMetadata(String json)	Extracts metadata from the provided JSON string.
void	setLeftOperandProcessor(JsonPathMetadataProcessor leftOperandProcessor)	Sets the JsonPathMetadataProcessor responsible for extracting the left operand value from the JSON.
void	setMetadatumContributor(SimpleJsonPathMetadataContributor metadatumContributor)	Sets the SimpleJsonPathMetadataContributor responsible for extracting metadata if the condition is met.
void	setRightOperand(String rightOperand)	Sets the right operand value that the extracted JSON value must match for metadata extraction to proceed.

Methods inherited from class org.dspace.importer.external.metadatamapping.contributor.SimpleJsonPathMetadataContributor

getField, getQuery, setField, setMetadataFieldMapping, setMetadataProcessor, setQuery

Methods inherited from class java.lang.Object

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

Constructor Details

ConditionEqualJsonPathMetadataContributor

public ConditionEqualJsonPathMetadataContributor()

Method Details

contributeMetadata

public Collection<MetadatumDTO> contributeMetadata(String json)

Extracts metadata from the provided JSON string. The extraction process follows these steps:

1. Uses JsonPathMetadataProcessor to extract a value from the JSON.
2. Compares the extracted value with the predefined right operand.
3. If they match, the SimpleJsonPathMetadataContributor is used to extract and return metadata.
4. If they do not match, an empty collection is returned.

Specified by:

contributeMetadata in interface MetadataContributor<String>

Overrides:

contributeMetadata in class SimpleJsonPathMetadataContributor

Parameters:

json - The JSON string to process.

Returns:

A collection of MetadatumDTO if the condition is met; otherwise, an empty collection.

setLeftOperandProcessor

public void setLeftOperandProcessor(JsonPathMetadataProcessor leftOperandProcessor)

Sets the JsonPathMetadataProcessor responsible for extracting the left operand value from the JSON.

Parameters:

leftOperandProcessor - The JSON path processor used for extraction.

setRightOperand

public void setRightOperand(String rightOperand)

Sets the right operand value that the extracted JSON value must match for metadata extraction to proceed.

Parameters:

rightOperand - The expected value to compare against.

setMetadatumContributor

public void setMetadatumContributor(SimpleJsonPathMetadataContributor metadatumContributor)

Sets the SimpleJsonPathMetadataContributor responsible for extracting metadata if the condition is met.

Parameters:

metadatumContributor - The metadata contributor to use upon a successful match.