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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2019-2021 Payara Foundation and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://github.com/payara/Payara/blob/main/LICENSE.txt
 * See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * The Payara Foundation designates this particular file as subject to the "Classpath"
 * exception as provided by the Payara Foundation in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
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package fish.payara.ejb.http.protocol;

import jakarta.json.bind.annotation.JsonbPropertyOrder;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.Optional;
import java.util.stream.Stream;

/**
 * Result of invoking an EJB method.
 * 
 * @author Jan Bernitt
 */
@JsonbPropertyOrder({"type", "result"})
public class InvokeMethodResponse implements Serializable {

    private static final long serialVersionUID = 1L;

    /**
     * Actual type of the result
     */
    public final String type;
    public final Object result;

    public InvokeMethodResponse(Object result) {
        this(result == null ? "" : result.getClass().getName(), result);
    }

    public InvokeMethodResponse(String type, Object result) {
        this.type = type;
        this.result = result;
    }

    public static class ResultType implements Annotation {
        public final Type type;

        @Override
        public Class annotationType() {
            return ResultType.class;
        }

        public ResultType(Method method) {
            this.type = method.getGenericReturnType();
        }

        public static Annotation[] of(Method method) {
            return new Annotation[] { new ResultType(method) };
        }

        public static boolean isPresent(Annotation[] annotations) {
            return annotations != null && Stream.of(annotations).anyMatch(ResultType.class::isInstance);
        }

        public static ResultType find(Annotation[] annotations) {
            Optional found = Optional.empty();
            if (annotations != null) {
                found = Stream.of(annotations).filter(ResultType.class::isInstance).map(ResultType.class::cast).findAny();
            }
            return found.orElseThrow(() -> new IllegalArgumentException("ResultType annotation is not present") );
        }
    }
}