com.covisint.platform.oauth.client.token.sdk.DefaultAuthConfigurationProvider Maven / Gradle / Ivy

/* 
 * Copyright 2015 Covisint
 * 
 * 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 com.covisint.platform.oauth.client.token.sdk;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Properties;

import com.covisint.core.support.constraint.Constraints;
import com.covisint.core.support.constraint.Nonnull;
import com.covisint.core.support.constraint.NotEmpty;
import com.covisint.core.support.constraint.Nullable;
import com.covisint.core.support.primitive.StringSupport;

/**
 * Implementation of a {@link AuthConfigurationProvider} that reads from a standard properties file located within the
 * classpath.
 */
public final class DefaultAuthConfigurationProvider extends AbstractClasspathPropertyLoader implements
        AuthConfigurationProvider {

    /** The name of the client properties file. */
    private static final String DEFAULT_FILE_NAME = "client.conf";

    /** The application id. */
    private String applicationId;

    /** The client id. */
    private String clientId;

    /** The client secret. */
    private String clientSecret;

    /** The auth service base URL. */
    private URL authServiceBaseUrl;

    /** Initializing constructor. */
    public DefaultAuthConfigurationProvider() {
        loadCredentials();
    }

    /** Load credentials from the loaded properties. */
    private void loadCredentials() {
        final Properties props = getProperties();

        applicationId = getRequiredProperty(props, "applicationId");
        clientId = getRequiredProperty(props, "clientId");
        clientSecret = getRequiredProperty(props, "clientSecret");
        try {
            authServiceBaseUrl = new URL(getRequiredProperty(props, "authServiceBaseUrl"));
        } catch (MalformedURLException e) {
            throw new IllegalStateException("Bad auth service URL", e);
        }
    }

    /**
     * Returns a required property from the given properties. Throw a constraint violation exception if it doesn't exist
     * or is null.
     * 
     * @param props The properties to load.
     * @param propertyName The name of the property to load.
     * @return Returns a required property from the given properties. Throw a constraint violation exception if it
     *         doesn't exist or is null.
     */
    private String getRequiredProperty(Properties props, String propertyName) {
        return Constraints.isNotNull(StringSupport.trimOrNull(props.getProperty(propertyName)), propertyName
                + " property not set.");
    }

    /** {@inheritDoc} */
    @Nullable public String getApplicationId() {
        return applicationId;
    }

    /** {@inheritDoc} */
    @Nonnull @NotEmpty public String getClientId() {
        return clientId;
    }

    /** {@inheritDoc} */
    @Nonnull @NotEmpty public String getClientSecret() {
        return clientSecret;
    }

    /** {@inheritDoc} */
    @Nonnull public URL getAuthServiceBaseUrl() {
        return authServiceBaseUrl;
    }

    /** {@inheritDoc} */
    @Nonnull @NotEmpty protected String getPropertyFileName() {
        return DEFAULT_FILE_NAME;
    }

}