public boolean getRelation(
XRI3Segment[] contributorXris,
XRI3Segment relativeContextNodeXri,
XRI3Segment arcXri,
XRI3Segment targetContextNodeXri,
XRI3Segment contextNodeXri,
GetOperation operation,
MessageResult messageResult,
ExecutionContext executionContext)
throws Xdi2MessagingException {
MessageResult tempMessageResult = new MessageResult();
this.getContext(
contributorXris,
relativeContextNodeXri,
contextNodeXri,
operation,
tempMessageResult,
executionContext);
ContextNode tempContextNode =
tempMessageResult.getGraph().findContextNode(contextNodeXri, false);
if (tempContextNode == null) return false;
if (Variables.isVariableSingle(targetContextNodeXri)) {
Iterator<Relation> relations;
if (Variables.isVariableSingle(arcXri)) {
relations = tempContextNode.getRelations();
} else {
relations = tempContextNode.getRelations(arcXri);
}
while (relations.hasNext())
CopyUtil.copyRelation(relations.next(), messageResult.getGraph(), null);
} else {
Relation relation = tempContextNode.getRelation(arcXri, targetContextNodeXri);
if (relation == null) return false;
CopyUtil.copyRelation(relation, messageResult.getGraph(), null);
}
return false;
}
public boolean getLiteral(
XRI3Segment[] contributorXris,
XRI3Segment relativeContextNodeXri,
XRI3Segment contextNodeXri,
String literalData,
GetOperation operation,
MessageResult messageResult,
ExecutionContext executionContext)
throws Xdi2MessagingException {
MessageResult tempMessageResult = new MessageResult();
this.getContext(
contributorXris,
relativeContextNodeXri,
contextNodeXri,
operation,
tempMessageResult,
executionContext);
ContextNode tempContextNode =
tempMessageResult.getGraph().findContextNode(contextNodeXri, false);
if (tempContextNode == null) return false;
Literal tempLiteral = tempContextNode.getLiteral();
if (tempLiteral == null) return false;
if (literalData.isEmpty() || literalData.equals(tempLiteral.getLiteralData())) {
CopyUtil.copyLiteral(tempLiteral, messageResult.getGraph(), null);
}
return false;
}
@Override
public void execute(
MessageEnvelope messageEnvelope,
ExecutionContext executionContext,
ExecutionResult executionResult)
throws Xdi2MessagingException {
for (Operation operation : messageEnvelope.getOperations()) {
Graph operationResultGraph = executionResult.createOperationResultGraph(operation);
CopyUtil.copyContextNode(operation.getMessage().getContextNode(), operationResultGraph, null);
}
executionResult.finish();
}