dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/oaf/Relation.java

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package eu.dnetlib.dhp.schema.oaf;
import static com.google.common.base.Preconditions.checkArgument;
import java.text.ParseException;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import eu.dnetlib.dhp.schema.common.ModelSupport;
/**
* Relation models any edge between two nodes in the OpenAIRE graph. It has a source id and a target id pointing to
* graph node identifiers and it is further characterised by the semantic of the link through the fields relType,
* subRelType and relClass. Provenance information is modeled according to the dataInfo element and collectedFrom, while
* individual relationship types can provide extra information via the properties field.
*/
public class Relation extends Oaf {
/**
* Main relationship classifier, values include 'resultResult', 'resultProject', 'resultOrganization', etc.
*/
private String relType;
/**
* Further classifies a relationship, values include 'affiliation', 'similarity', 'supplement', etc.
*/
private String subRelType;
/**
* Indicates the direction of the relationship, values include 'isSupplementTo', 'isSupplementedBy', 'merges,
* 'isMergedIn'.
*/
private String relClass;
/**
* The source entity id.
*/
private String source;
/**
* The target entity id.
*/
private String target;
/**
* Was this relationship authoritatively validated?
*/
private Boolean validated;
/**
* When was this relationship authoritatively validated.
*/
private String validationDate;
/**
* List of relation specific properties. Values include 'similarityLevel', indicating the similarity score between a
* pair of publications.
*/
private List<KeyValue> properties = new ArrayList<>();
public String getRelType() {
return relType;
}
public void setRelType(final String relType) {
this.relType = relType;
}
public String getSubRelType() {
return subRelType;
}
public void setSubRelType(final String subRelType) {
this.subRelType = subRelType;
}
public String getRelClass() {
return relClass;
}
public void setRelClass(final String relClass) {
this.relClass = relClass;
}
public String getSource() {
return source;
}
public void setSource(final String source) {
this.source = source;
}
public String getTarget() {
return target;
}
public void setTarget(final String target) {
this.target = target;
}
public List<KeyValue> getProperties() {
return properties;
}
public void setProperties(List<KeyValue> properties) {
this.properties = properties;
}
public Boolean getValidated() {
return Objects.nonNull(validated) && validated;
}
public void setValidated(Boolean validated) {
this.validated = validated;
}
public String getValidationDate() {
return validationDate;
}
public void setValidationDate(String validationDate) {
this.validationDate = validationDate;
}
public void mergeFrom(final Relation r) {
checkArgument(Objects.equals(getSource(), r.getSource()), "source ids must be equal");
checkArgument(Objects.equals(getTarget(), r.getTarget()), "target ids must be equal");
checkArgument(Objects.equals(getRelType(), r.getRelType()), "relType(s) must be equal");
checkArgument(
Objects.equals(getSubRelType(), r.getSubRelType()), "subRelType(s) must be equal");
checkArgument(Objects.equals(getRelClass(), r.getRelClass()), "relClass(es) must be equal");
setValidated(getValidated() || r.getValidated());
try {
setValidationDate(ModelSupport.oldest(getValidationDate(), r.getValidationDate()));
} catch (ParseException e) {
throw new IllegalArgumentException(String
.format(
"invalid validation date format in relation [s:%s, t:%s]: %s", getSource(), getTarget(),
getValidationDate()));
}
super.mergeFrom(r);
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
Relation relation = (Relation) o;
return relType.equals(relation.relType)
&& subRelType.equals(relation.subRelType)
&& relClass.equals(relation.relClass)
&& source.equals(relation.source)
&& target.equals(relation.target);
}
@Override
public int hashCode() {
return Objects.hash(relType, subRelType, relClass, source, target, collectedfrom);
}
}