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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2010, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.weld.bootstrap.api;

import java.util.HashSet;
import java.util.Set;

import org.jboss.weld.injection.spi.EjbInjectionServices;
import org.jboss.weld.injection.spi.InjectionServices;
import org.jboss.weld.injection.spi.JpaInjectionServices;
import org.jboss.weld.injection.spi.ResourceInjectionServices;
import org.jboss.weld.resources.spi.ResourceLoader;
import org.jboss.weld.security.spi.SecurityServices;
import org.jboss.weld.transaction.spi.TransactionServices;

/**
 * Requirements for various well known environments.
 *
 * @author Pete Muir
 *
 */
public enum Environments implements Environment {

    /**
     * Java EE5 or Java EE6
     *
     * In this environment, Weld requires that {@link JpaInjectionServices}, {@link ResourceInjectionServices} and
     * {@link EjbInjectionServices} are present, and so will perform EE-style field injection on managed beans itself
     */
    EE_INJECT(new EnvironmentBuilder().addRequiredDeploymentService(TransactionServices.class)
            .addRequiredDeploymentService(SecurityServices.class)
            /*
             * EjbServices is a required bean deployment archive service in this environment.
             * For backwards compatibility with older integrators that register EjbServices
             * as a deployment service, this check is suppressed.
             *
             * @see WELD-1685
             */
            // .addRequiredBeanDeploymentArchiveService(EjbServices.class)
            .addRequiredBeanDeploymentArchiveService(ResourceLoader.class)
            .addRequiredBeanDeploymentArchiveService(JpaInjectionServices.class)
            .addRequiredBeanDeploymentArchiveService(ResourceInjectionServices.class)
            .addRequiredBeanDeploymentArchiveService(EjbInjectionServices.class)),

    /**
     * Java EE5 or Java EE6
     *
     * In this environment, Weld requires that {@link InjectionServices} are present, and expects the container to use this
     * callback to perform EE-style injection
     *
     */
    EE(new EnvironmentBuilder().addRequiredDeploymentService(TransactionServices.class)
            .addRequiredDeploymentService(SecurityServices.class)
            /*
             * EjbServices is a required bean deployment archive service in this environment.
             * For backwards compatibility with older integrators that register EjbServices
             * as a deployment service, this check is suppressed.
             *
             * @see WELD-1685
             */
            // .addRequiredBeanDeploymentArchiveService(EjbServices.class)
            .addRequiredBeanDeploymentArchiveService(ResourceLoader.class)
            .addRequiredBeanDeploymentArchiveService(InjectionServices.class)),

    /**
     * Servlet container such as Tomcat
     */
    SERVLET(new EnvironmentBuilder()
            .addRequiredBeanDeploymentArchiveService(ResourceLoader.class)),

    /**
     * Java SE
     */
    SE(new EnvironmentBuilder()
            .addRequiredBeanDeploymentArchiveService(ResourceLoader.class));

    private final Set> requiredDeploymentServices;

    private final Set> requiredBeanDeploymentArchiveServices;

    private Environments(EnvironmentBuilder builder) {
        this.requiredDeploymentServices = builder.getRequiredDeploymentServices();
        this.requiredBeanDeploymentArchiveServices = builder.getRequiredBeanDeploymentArchiveServices();
    }

    public Set> getRequiredDeploymentServices() {
        return requiredDeploymentServices;
    }

    public Set> getRequiredBeanDeploymentArchiveServices() {
        return requiredBeanDeploymentArchiveServices;
    }

    private static class EnvironmentBuilder {

        private final Set> requiredDeploymentServices;

        private final Set> requiredBeanDeploymentArchiveServices;

        private EnvironmentBuilder() {
            this.requiredBeanDeploymentArchiveServices = new HashSet>();
            this.requiredDeploymentServices = new HashSet>();
        }

        private Set> getRequiredBeanDeploymentArchiveServices() {
            return requiredBeanDeploymentArchiveServices;
        }

        private Set> getRequiredDeploymentServices() {
            return requiredDeploymentServices;
        }

        private EnvironmentBuilder addRequiredDeploymentService(Class service) {
            this.requiredDeploymentServices.add(service);
            return this;
        }

        private EnvironmentBuilder addRequiredBeanDeploymentArchiveService(Class service) {
            this.requiredBeanDeploymentArchiveServices.add(service);
            return this;
        }

    }

}




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