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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 org.apache.sshd.common;

import java.util.Collection;

import org.apache.sshd.common.util.GenericUtils;

/**
 * @author Apache MINA SSHD Project
 */
@FunctionalInterface
public interface OptionalFeature {
    OptionalFeature TRUE = new OptionalFeature() {
        @Override
        public boolean isSupported() {
            return true;
        }

        @Override
        public String toString() {
            return "TRUE";
        }
    };

    OptionalFeature FALSE = new OptionalFeature() {
        @Override
        public boolean isSupported() {
            return false;
        }

        @Override
        public String toString() {
            return "FALSE";
        }
    };

    boolean isSupported();

    static OptionalFeature of(boolean supported) {
        return supported ? TRUE : FALSE;
    }

    static OptionalFeature all(Collection features) {
        return () -> {
            if (GenericUtils.isEmpty(features)) {
                return false;
            }

            for (OptionalFeature f : features) {
                if (!f.isSupported()) {
                    return false;
                }
            }

            return true;
        };
    }

    static OptionalFeature any(Collection features) {
        return () -> {
            if (GenericUtils.isEmpty(features)) {
                return false;
            }

            for (OptionalFeature f : features) {
                if (f.isSupported()) {
                    return true;
                }
            }

            return false;
        };
    }
}