use of org.apache.nifi.hl7.query.evaluator.literal.StringLiteralEvaluator in project nifi by apache.
the class HL7Query method buildReferenceEvaluator.
private Evaluator<?> buildReferenceEvaluator(final Tree tree) {
switch(tree.getType()) {
case MESSAGE:
return new MessageEvaluator();
case SEGMENT_NAME:
return new SegmentEvaluator(new StringLiteralEvaluator(tree.getText()));
case IDENTIFIER:
return new DeclaredReferenceEvaluator(new StringLiteralEvaluator(tree.getText()));
case DOT:
final Tree firstChild = tree.getChild(0);
final Tree secondChild = tree.getChild(1);
return new DotEvaluator(buildReferenceEvaluator(firstChild), buildIntegerEvaluator(secondChild));
case STRING_LITERAL:
return new StringLiteralEvaluator(tree.getText());
case NUMBER:
return new IntegerLiteralEvaluator(Integer.parseInt(tree.getText()));
default:
throw new HL7QueryParsingException("Failed to build evaluator for " + tree.getText());
}
}
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