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package net.sf.aguacate.function.spi.impl;

import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import net.sf.aguacate.connector.ConnectorCoupling;
import net.sf.aguacate.function.FunctionContext;
import net.sf.aguacate.function.FunctionEvalResult;
import net.sf.aguacate.function.spi.AbstractFunction;
import net.sf.aguacate.util.parameter.Parameter;
import net.sf.aguacate.util.parameter.Prm;
import net.sf.aguacate.util.type.Str;

public class FunctionConnectorCall extends AbstractFunction {

	private static final Logger LOGGER = LogManager.getLogger(FunctionConnectorCall.class);

	private final String connectorName;

	private final Parameter[] parameters;

	private final String[] outputContext;

	private final String outputName;

	public FunctionConnectorCall(Collection methods, String name, String connectorName,
			Collection parameters, List outputContext, String outputName) {
		super(methods, name);
		this.connectorName = connectorName;
		this.parameters = Prm.toArray(parameters);
		this.outputContext = Str.toArray(outputContext);
		this.outputName = outputName;
	}

	@Override
	public FunctionEvalResult evaluate(FunctionContext functionContext, Map context) {
		Map prms = new LinkedHashMap<>();
		for (Parameter parameter : parameters) {
			String name = parameter.getName();
			LOGGER.trace(name);
			Map ctx = parameter.calculateContext(context);
			if (ctx.containsKey(name)) {
				prms.put(parameter.getAliasOf(), ctx.get(name));
			}
		}
		return new FunctionEvalResult(true, ConnectorCoupling.execute(connectorName, prms));
	}

	@Override
	public String getOutputName() {
		return outputName;
	}

	@Override
	public String[] getOutputContext() {
		return outputContext;
	}

}