com.eucalyptus.auth.util.ClassPathSystemAccountProvider.java Source code

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Here is the source code for com.eucalyptus.auth.util.ClassPathSystemAccountProvider.java

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/*************************************************************************
 * Copyright 2009-2015 Eucalyptus Systems, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
 * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
 * additional information or have any questions.
 ************************************************************************/
package com.eucalyptus.auth.util;

import java.io.IOException;
import java.util.List;
import com.google.common.base.CaseFormat;
import com.google.common.base.Charsets;
import com.google.common.base.Throwables;
import com.google.common.io.Resources;

/**
 *
 */
public class ClassPathSystemAccountProvider implements SystemAccountProvider {

    private final String alias;
    private final boolean createAdminAccessKey;
    private final List<SystemAccountRole> roles;

    public ClassPathSystemAccountProvider(final String alias, final boolean createAdminAccessKey,
            final List<SystemAccountRole> roles) {
        this.alias = alias;
        this.createAdminAccessKey = createAdminAccessKey;
        this.roles = roles;

        for (final SystemAccountRole role : roles) {
            if (role instanceof ClassPathSystemAccountRole) {
                ((ClassPathSystemAccountRole) role).setResourceClass(getClass());
            }
        }
    }

    @Override
    public String getAlias() {
        return alias;
    }

    @Override
    public boolean isCreateAdminAccessKey() {
        return createAdminAccessKey;
    }

    @Override
    public List<SystemAccountRole> getRoles() {
        return roles;
    }

    protected static AttachedPolicy newAttachedPolicy(final String name) {
        return new ClassPathAttachedPolicy(name);
    }

    protected static SystemAccountRole newSystemAccountRole(final String name, final String path,
            final List<AttachedPolicy> policies) {
        return new ClassPathSystemAccountRole(name, path, policies);
    }

    private static String getResourceName(String name, String type) {
        return CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_HYPHEN, name + type) + ".json";
    }

    private static String loadResource(final Class<?> resourceClass, final String resourceName) {
        try {
            return Resources.toString(Resources.getResource(resourceClass, resourceName), Charsets.UTF_8);
        } catch (final IOException e) {
            throw Throwables.propagate(e);
        }
    }

    private static final class ClassPathAttachedPolicy implements AttachedPolicy {
        private Class<?> resourceClass;
        private final String name;

        public ClassPathAttachedPolicy(final String name) {
            this.name = name;
        }

        @Override
        public String getName() {
            return name;
        }

        @Override
        public String getPolicy() {
            return loadResource(resourceClass, getResourceName(getName(), "Policy"));
        }

        void setResourceClass(final Class<?> resourceClass) {
            this.resourceClass = resourceClass;
        }
    }

    private static final class ClassPathSystemAccountRole implements SystemAccountRole {
        private Class<?> resourceClass;
        private final String name;
        private final String path;
        private final List<AttachedPolicy> policies;

        public ClassPathSystemAccountRole(final String name, final String path,
                final List<AttachedPolicy> policies) {
            this.name = name;
            this.path = path;
            this.policies = policies;
        }

        @Override
        public String getName() {
            return name;
        }

        @Override
        public String getPath() {
            return path;
        }

        @Override
        public String getAssumeRolePolicy() {
            return loadResource(resourceClass, getResourceName(getName(), "AssumeRolePolicy"));
        }

        @Override
        public List<AttachedPolicy> getPolicies() {
            return policies;
        }

        void setResourceClass(final Class<?> resourceClass) {
            this.resourceClass = resourceClass;
            for (final AttachedPolicy policy : policies) {
                if (policy instanceof ClassPathAttachedPolicy) {
                    ((ClassPathAttachedPolicy) policy).setResourceClass(resourceClass);
                }
            }
        }
    }

}