package com.acme.functions;
import java.util.List;
import org.activebpel.rt.bpel.function.AeFunction;
import org.activebpel.rt.bpel.function.AeFunctionCallException;
import org.activebpel.rt.bpel.function.AeFunctionContext;
import org.activebpel.rt.bpel.function.AeFunctionUnit;
import org.activebpel.rt.bpel.function.AeUnresolvableException;
import org.activebpel.rt.bpel.function.IAeFunction;
import org.activebpel.rt.bpel.function.IAeFunctionContext;
import org.activebpel.rt.bpel.function.IAeFunctionExecutionContext;
@AeFunctionContext(name = "AcmeContext", namespace = "http://acme.com/functions")
public class GenericFunctionContext implements IAeFunctionContext {
	private IAeFunction echoFunction = new EchoFunction();
	private IAeFunction companyNameFunction = new CompanyNameFunction();
	@Override
	@AeFunctionUnit(prefix = "ac", display = "ACME", 
                 hoverText = "Acme company functions", functions = {
			@AeFunction(syntax = "${prefix}:echo(${caret})", display = "echo(param)", hoverText = "echo function that returns the given string"),
			@AeFunction(syntax = "${prefix}:companyName()", display = "companyName()", hoverText = "Returns company name") })
	public IAeFunction getFunction(String aFunctionName)
			throws AeUnresolvableException {
		if (aFunctionName.equals("echo"))
			return echoFunction;
		else if (aFunctionName.equals("companyName"))
			return companyNameFunction;
		return null;
	}
	private class EchoFunction implements IAeFunction {
		@Override
		public Object call(IAeFunctionExecutionContext aContext, List aArgs)
				throws AeFunctionCallException {
			if (aArgs.size() == 1)
				return aArgs.get(0);
			return null;
		}
	}
	private class CompanyNameFunction implements IAeFunction {
		@Override
		public Object call(IAeFunctionExecutionContext arg0, List arg1)
				throws AeFunctionCallException {
			return "acme";
		}
	}
}