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/**
 * vertigo - simple java starter
 *
 * Copyright (C) 2013, KleeGroup, [email protected] (http://www.kleegroup.com)
 * KleeGroup, Centre d'affaire la Boursidiere - BP 159 - 92357 Le Plessis Robinson Cedex - France
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.vertigo.vega.plugins.webservice.handler.reader;

import io.vertigo.lang.Assertion;
import io.vertigo.vega.plugins.webservice.handler.WebServiceCallContext;
import io.vertigo.vega.webservice.metamodel.WebServiceParam;
import io.vertigo.vega.webservice.metamodel.WebServiceParam.WebServiceParamType;

import java.util.Arrays;

import spark.Request;

public final class HeaderJsonReader implements JsonReader {

	/** {@inheritDoc} */
	@Override
	public WebServiceParamType[] getSupportedInput() {
		return new WebServiceParamType[] { WebServiceParamType.Header };
	}

	/** {@inheritDoc} */
	@Override
	public Class getSupportedOutput() {
		return String.class;
	}

	/** {@inheritDoc} */
	@Override
	public String extractData(final Request request, final WebServiceParam webServiceParam, final WebServiceCallContext routeContext) {
		Assertion.checkArgument(getSupportedInput()[0].equals(webServiceParam.getParamType()), "This JsonReader can't read the asked request ParamType {0}. Only {1} is supported", webServiceParam.getParamType(), Arrays.toString(getSupportedInput()));
		//-----
		return request.headers(webServiceParam.getName());
	}

}