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The AWS SDK for Java - Core module holds the classes that are used by the individual service clients to interact with Amazon Web Services. Users need to depend on aws-java-sdk artifact for accessing individual client classes.

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/*
 * Copyright 2010-2024 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazonaws.endpointdiscovery;

import com.amazonaws.annotation.SdkTestInternalApi;
import com.amazonaws.auth.profile.internal.AllProfiles;
import com.amazonaws.auth.profile.internal.AwsProfileNameLoader;
import com.amazonaws.auth.profile.internal.BasicProfile;
import com.amazonaws.auth.profile.internal.BasicProfileConfigLoader;
import com.amazonaws.auth.profile.internal.ProfileKeyConstants;
import com.amazonaws.profile.path.AwsProfileFileLocationProvider;
import com.amazonaws.util.StringUtils;

import java.io.File;

public class AwsProfileEndpointDiscoveryProvider implements EndpointDiscoveryProvider {

    private final String profileName;
    private final AwsProfileFileLocationProvider locationProvider;
    private final BasicProfileConfigLoader profileConfigLoader;

    public AwsProfileEndpointDiscoveryProvider() {
        this(AwsProfileNameLoader.INSTANCE.loadProfileName());
    }

    public AwsProfileEndpointDiscoveryProvider(String profileName) {
        this(profileName, AwsProfileFileLocationProvider.DEFAULT_CONFIG_LOCATION_PROVIDER,
             BasicProfileConfigLoader.INSTANCE);
    }

    @SdkTestInternalApi
    AwsProfileEndpointDiscoveryProvider(String profileName,
                                        AwsProfileFileLocationProvider locationProvider,
                                        BasicProfileConfigLoader configLoader) {
        this.profileName = profileName;
        this.locationProvider = locationProvider;
        this.profileConfigLoader = configLoader;
    }

    @Override
    public Boolean endpointDiscoveryEnabled() {
        Boolean endpointDiscoveryEnabled = null;
        File configFile = locationProvider.getLocation();
        if (configFile != null && configFile.exists()) {
            BasicProfile profile = loadProfile(configFile);
            if (profile != null && !StringUtils.isNullOrEmpty(profile.getEndpointDiscovery())) {
                try {
                    endpointDiscoveryEnabled = Boolean.parseBoolean(profile.getEndpointDiscovery());
                } catch (Exception e) {
                    throw new RuntimeException("Unable to parse value for " + ProfileKeyConstants.ENDPOINT_DISCOVERY);
                }
            }
        }
        return endpointDiscoveryEnabled;
    }

    private BasicProfile loadProfile(File configFile) {
        final AllProfiles allProfiles = profileConfigLoader.loadProfiles(configFile);
        return allProfiles.getProfile(profileName);
    }
}