Examples with SegmentEvaluator org.apache.nifi.hl7.query.evaluator.message.SegmentEvaluator used on opensource projects

Example 1 with SegmentEvaluator

use of org.apache.nifi.hl7.query.evaluator.message.SegmentEvaluator 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());
    }
}