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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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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2017 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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 org.jboss.ejb.client;

import static java.util.Collections.emptyMap;
import static org.jboss.ejb.client.EJBClientContext.InterceptorList.EMPTY;

import java.lang.reflect.Method;
import java.util.Collection;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.function.Function;

import org.jboss.ejb.client.EJBClientContext.InterceptorList;

final class EJBProxyInterceptorInformation {
    private final EJBProxyInformation proxyInformation;
    private final IdentityHashMap interceptorsByMethod;
    private final HashMap interceptorsByMethodFallback;
    private final InterceptorList classInterceptors;

    private EJBProxyInterceptorInformation(final EJBProxyInformation proxyInformation, final IdentityHashMap interceptorsByMethod, final InterceptorList classInterceptors) {
        this.proxyInformation = proxyInformation;
        this.interceptorsByMethod = interceptorsByMethod;
        this.interceptorsByMethodFallback = new HashMap<>(interceptorsByMethod);
        this.classInterceptors = classInterceptors;
    }

    static  EJBProxyInterceptorInformation construct(Class clazz, EJBClientContext clientContext) {
        final EJBProxyInformation proxyInformation = EJBProxyInformation.forViewType(clazz);
        final Collection methods = proxyInformation.getMethods();
        final String className = clazz.getName();
        final InterceptorList list0 = EJBClientContext.defaultInterceptors;
        final InterceptorList list1 = clientContext.getGlobalInterceptors();
        final InterceptorList list2 = clientContext.getClassPathInterceptors();
        final InterceptorList list3 = clientContext.getConfiguredPerClassInterceptors().getOrDefault(className, EMPTY);
        final InterceptorList list5 = proxyInformation.getClassInterceptors();
        final IdentityHashMap interceptorsByMethod = new IdentityHashMap<>(methods.size());
        final HashMap cache = new HashMap<>();
        cache.computeIfAbsent(list0, Function.identity());
        final InterceptorList tailList = list3.combine(list2).combine(list1).combine(list0);
        cache.computeIfAbsent(tailList, Function.identity());
        for (EJBProxyInformation.ProxyMethodInfo method : methods) {
            // compile interceptor information
            final InterceptorList list4 = clientContext.getConfiguredPerMethodInterceptors().getOrDefault(className, emptyMap()).getOrDefault(method.getMethodLocator(), EMPTY);
            final InterceptorList list6 = method.getInterceptors();
            interceptorsByMethod.put(method.getMethod(), cache.computeIfAbsent(list6.combine(list5).combine(list4).combine(tailList), Function.identity()));
        }
        return new EJBProxyInterceptorInformation(proxyInformation, interceptorsByMethod, cache.computeIfAbsent(list5.combine(tailList), Function.identity()));
    }

    EJBProxyInformation getProxyInformation() {
        return proxyInformation;
    }

    InterceptorList getInterceptors(Method method) {
        final InterceptorList list = interceptorsByMethod.get(method);
        return list == null ? interceptorsByMethodFallback.get(method) : list;
    }

    InterceptorList getClassInterceptors() {
        return classInterceptors;
    }
}