Examples with FunctionFactory io.atlasmap.spi.FunctionFactory used on opensource projects

Example 1 with FunctionFactory

use of io.atlasmap.spi.FunctionFactory in project atlasmap by atlasmap.

the class DefaultAtlasFunctionResolver method init.

private void init() {
    functions = new HashMap<>();
    ServiceLoader<FunctionFactory> implementations = ServiceLoader.load(FunctionFactory.class, FunctionFactory.class.getClassLoader());
    for (FunctionFactory f : implementations) {
        functions.put(f.getName().toUpperCase(), f);
    }
    fieldActionService = DefaultAtlasFieldActionService.getInstance();
    fieldActionService.init();
}

Example 2 with FunctionFactory

use of io.atlasmap.spi.FunctionFactory in project atlasmap by atlasmap.

the class DefaultAtlasFunctionResolver method resolve.

@Override
public Expression resolve(final String name, List<Expression> args) throws ParseException {
    String functionName = name.toUpperCase();
    FunctionFactory f = functions.get(functionName);
    if (f != null) {
        return f.create(args);
    } else {
        // lookup action
        return (ctx) -> {
            List<Field> arguments = new ArrayList<>();
            for (Expression arg : args) {
                arguments.add(arg.evaluate(ctx));
            }
            Object valueForTypeEvaluation = null;
            if (arguments.isEmpty()) {
                return null;
            } else {
                valueForTypeEvaluation = arguments.get(arguments.size() - 1);
            }
            ActionProcessor actionProcessor = fieldActionService.findActionProcessor(name, valueForTypeEvaluation);
            if (actionProcessor != null) {
                Map<String, Object> actionParameters = new HashMap<>();
                ActionParameters actionDetailParameters = actionProcessor.getActionDetail().getParameters();
                if (actionDetailParameters != null && actionDetailParameters.getParameter() != null) {
                    for (ActionParameter parameter : actionDetailParameters.getParameter()) {
                        if (!arguments.isEmpty()) {
                            Object parameterValue = arguments.remove(0).getValue();
                            actionParameters.put(parameter.getName(), parameterValue);
                        } else {
                            throw new IllegalArgumentException(String.format("The transformation '%s' expects more parameters. The parameter '%s' is missing", name, parameter.getName()));
                        }
                    }
                }
                if (arguments.isEmpty()) {
                    throw new IllegalArgumentException(String.format("The transformation '%s' expects more arguments", name));
                }
                FieldGroup fields = new FieldGroup();
                fields.getField().addAll(arguments);
                return fieldActionService.buildAndProcessAction(actionProcessor, actionParameters, fields);
            } else {
                throw new IllegalArgumentException(String.format("The expression function or transformation '%s' was not found", name));
            }
        };
    }
}