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

import java.io.IOException;
import java.util.Collection;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import net.sf.aguacate.function.FunctionContext;
import net.sf.aguacate.function.FunctionEvalResult;
import net.sf.aguacate.function.Parameter;
import net.sf.aguacate.function.spi.AbstractFunction;
import net.sf.aguacate.http.HttpBodyBuilerCoupling;

public class FunctionResponse extends AbstractFunction {

	private final Parameter parameter;

	public FunctionResponse(Collection methods, String name, Parameter parameter) {
		super(methods, name);
		this.parameter = parameter;
	}

	@Override
	public FunctionEvalResult evaluate(FunctionContext functionContext, Map context) {
		try {
			String parameterName = parameter.getName();
			Object object = context.get(parameterName);
			if (object == null) {
				functionContext.response().setStatus(HttpServletResponse.SC_NOT_FOUND);
			} else {
				HttpBodyBuilerCoupling.defaultInstance().build(functionContext.response(), object,
						functionContext.getOutputFields());
			}
			return new FunctionEvalResult(null, null);
		} catch (IOException e) {
			throw new IllegalStateException(e);
		}
	}

}