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Trimble Identity OAuth Client library holds the client classes that are used for communicating with Trimble Identity Service
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package com.trimble.id;

import static com.trimble.id.AuthenticationConstants.SDK_VARIANT;
import static com.trimble.id.AuthenticationConstants.SDK_VERSION;
import java.net.URI;
import java.util.concurrent.CompletableFuture;

import com.trimble.id.analytics.AnalyticsHttpClient;

/** A HttpClient provider for APIs using Bearer token authorization */
public class BearerTokenHttpClientProvider implements IHttpClientProvider {

    private HttpClient httpClient;
    private ITokenProvider tokenProvider;
    private URI baseUri;

    /**
     * Public constructor of BearerTokenHttpClientProvider
     * 
     * @param tokenProvider The token provider that will be used to get the access
     *                      token
     * @param baseUri       The base URI of the API
     * @param configuration The configuration of the HttpClient
     */
    public BearerTokenHttpClientProvider(ITokenProvider tokenProvider, URI baseUri,
            HttpClientConfiguration configuration) {
        this.tokenProvider = tokenProvider;
        this.baseUri = baseUri;
        this.httpClient = new HttpClient(this.baseUri, configuration);

        AnalyticsHttpClient.sendInitEvent(this.getClass().getSimpleName(), this.getClass().getPackage().getName(),
                SDK_VERSION, null);
    }

    /**
     * Public constructor of BearerTokenHttpClientProvider
     * 
     * @param tokenProvider The token provider that will be used to get the access
     *                      token
     * @param baseUri       The base URI of the API
     */
    public BearerTokenHttpClientProvider(ITokenProvider tokenProvider, URI baseUri) {
        this.tokenProvider = tokenProvider;
        this.baseUri = baseUri;
        this.httpClient = new HttpClient(this.baseUri);

        AnalyticsHttpClient.sendInitEvent(this.getClass().getSimpleName(), this.getClass().getPackage().getName(),
                SDK_VERSION, null);
    }

    /**
     * Get the HttpClient with the authorization token set
     * 
     * @return A CompletableFuture that contains the HttpClient with the
     *         authorization token set
     */
    public CompletableFuture retrieveClient() throws SDKClientException {
        AnalyticsHttpClient.sendMethodEvent("retrieveClient", SDK_VARIANT, this.getClass().getPackage().getName(),
                SDK_VERSION);

        return tokenProvider.getAccessToken().thenApply((token) -> {
            httpClient.setAuthorizationToken(token);
            return httpClient;
        });
    }

    /**
     * Set the token provider
     * 
     * @param tokenProvider - The token provider that will be used to get the access
     *                      token
     * @return BearerTokenHttpClientProvider
     */
    public BearerTokenHttpClientProvider withTokenProvider(FixedTokenProvider tokenProvider) {
        this.tokenProvider = tokenProvider;
        return this;
    }

    /**
     * Dispose the HttpClient
     */
    public void dispose() {
        httpClient.dispose();
    }
}