Examples with UDFLanguage io.crate.expression.udf.UDFLanguage used on opensource projects

Example 1 with UDFLanguage

use of io.crate.expression.udf.UDFLanguage in project crate by crate.

the class DocSchemaInfoTest method setup.

@Before
public void setup() throws Exception {
    nodeCtx = createNodeContext();
    udfService = new UserDefinedFunctionService(clusterService, nodeCtx);
    udfService.registerLanguage(new UDFLanguage() {

        @Override
        public Scalar createFunctionImplementation(UserDefinedFunctionMetadata metadata, Signature signature) throws ScriptException {
            String error = validate(metadata);
            if (error != null) {
                throw new ScriptException("this is not Burlesque");
            }
            return new Scalar<>() {

                @Override
                public Object evaluate(TransactionContext txnCtx, NodeContext nodeCtx, Input[] args) {
                    return null;
                }

                @Override
                public Signature signature() {
                    return signature;
                }

                @Override
                public Signature boundSignature() {
                    return signature;
                }
            };
        }

        @Override
        @Nullable
        public String validate(UserDefinedFunctionMetadata metadata) {
            if (!metadata.definition().equals("\"Hello, World!\"Q")) {
                return "this is not Burlesque";
            }
            return null;
        }

        @Override
        public String name() {
            return "burlesque";
        }
    });
    docSchemaInfo = new DocSchemaInfo("doc", clusterService, nodeCtx, udfService, (ident, state) -> null, new TestingDocTableInfoFactory(Map.of()));
}