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

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

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/*************************************************************************
 * Copyright 2009-2013 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 com.eucalyptus.auth.DatabaseAuthBootstrapper;
import com.eucalyptus.util.Exceptions;
import com.google.common.base.CaseFormat;
import com.google.common.base.Charsets;
import com.google.common.io.Resources;

/**
 * System role provider that loads policies from classpath resources.
 *
 * E.g. ProviderName ->
 *        provider-name-assume-role-policy.json
 *        provider-name-policy.json
 */
public abstract class ClassPathSystemRoleProvider implements DatabaseAuthBootstrapper.SystemRoleProvider {

    @Override
    public String getAssumeRolePolicy() {
        return loadPolicy(getResourceName("AssumeRolePolicy"));
    }

    @Override
    public String getPolicy() {
        return loadPolicy(getResourceName("Policy"));
    }

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

    private String loadPolicy(final String resourceName) {
        try {
            return Resources.toString(Resources.getResource(getClass(), resourceName), Charsets.UTF_8);
        } catch (final IOException e) {
            throw Exceptions.toUndeclared(e);
        }
    }
}