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

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package org.apache.juneau.rest.params;

import org.apache.juneau.reflect.*;
import org.apache.juneau.rest.*;
import org.apache.juneau.rest.annotation.*;

/**
 * Resolves method parameters annotated with {@link Method} on {@link RestMethod}-annotated Java methods.
 *
 * <p>
 * The parameter value is resolved using <c><jv>call</jv>.{@link RestCall#getRestRequest() getRestRequest}().{@link RestRequest#getMethod() getMethod}()</c>.
 *
 * <p>
 * The parameter type must be {@link String}.
 */
public class MethodParam implements RestParam {

	/**
	 * Static creator.
	 *
	 * @param paramInfo The Java method parameter being resolved.
	 * @return A new {@link MethodParam}, or <jk>null</jk> if the parameter isn't annotated with {@link Method}.
	 */
	public static MethodParam create(ParamInfo paramInfo) {
		if (paramInfo.hasAnnotation(Method.class))
			return new MethodParam();
		return null;
	}

	/**
	 * Constructor.
	 */
	protected MethodParam() {
	}

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