juneau-rest/juneau-rest-server/src/main/java/org/apache/juneau/rest/params/RequestBeanParam.java

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package org.apache.juneau.rest.params;

import org.apache.juneau.*;
import org.apache.juneau.http.annotation.*;
import org.apache.juneau.httppart.bean.*;
import org.apache.juneau.reflect.*;
import org.apache.juneau.rest.*;
import org.apache.juneau.rest.annotation.*;

/**
 * Resolves method parameters annotated with {@link Request} on {@link RestMethod}-annotated Java methods.
 *
 * <p>
 * The parameter value is resolved using <c><jv>call</jv>.{@link RestCall#getRestRequest() getRestRequest}().{@link RestRequest#getRequest(RequestBeanMeta) getRequest}(<jv>requestBeanMeta</jv>)</c>
 * with a {@link RequestBeanMeta meta} derived from the {@link Request} annotation and context configuration.
 */
public class RequestBeanParam implements RestParam {
	private final RequestBeanMeta meta;

	/**
	 * Static creator.
	 *
	 * @param paramInfo The Java method parameter being resolved.
	 * @param ps The configuration properties of the {@link RestContext}.
	 * @return A new {@link RequestBeanParam}, or <jk>null</jk> if the parameter is not annotated with {@link Request}.
	 */
	public static RequestBeanParam create(ParamInfo paramInfo, PropertyStore ps) {
		if (paramInfo.hasAnnotation(Request.class))
			return new RequestBeanParam(paramInfo, ps);
		return null;
	}

	/**
	 * Constructor.
	 *
	 * @param paramInfo The Java method parameter being resolved.
	 * @param ps The configuration properties of the {@link RestContext}.
	 */
	protected RequestBeanParam(ParamInfo paramInfo, PropertyStore ps) {
		this.meta = RequestBeanMeta.create(paramInfo, ps);
	}

	@Override /* RestMethodParam */
	public Object resolve(RestCall call) throws Exception {
		return call.getRestRequest().getRequest(meta);
	}
}