OAuthServiceImpl.java

package org.oauth2.client4j.service;

import org.oauth2.client4j.builder.OAuthRequestBuilder;
import org.oauth2.client4j.builder.provider.Provider;
import org.oauth2.client4j.common.OAuth;
import org.oauth2.client4j.http.OAuthHttpClient;
import org.oauth2.client4j.http.OAuthRequest;
import org.oauth2.client4j.http.Request;
import org.oauth2.client4j.http.client.HttpClient;
import org.oauth2.client4j.http.response.JSONAccessTokenResponse;
import org.oauth2.client4j.http.response.OAuthResponse;
import org.oauth2.client4j.model.OAuthConfig;

public class OAuthServiceImpl implements OAuthService {

	private final Provider provider;
	private final OAuthConfig config;
	
	private HttpClient httpClient;

	public OAuthServiceImpl(Provider provider, OAuthConfig config) {
		this.provider = provider;
		this.config = config;
	}

	@Override
	public OAuthRequest getAuthorizationRequest() {
		return new OAuthRequestBuilder()
				.url(provider.getAuthorizationEndpoint())
				.requestType(provider.getAuthorRequestType()).parameter(config)
				.build();
	}

	@Override
	public OAuthResponse accessToken(String code) {
		return  this.accessToken(code, provider.getAccessTokenResponseClass());
	}

	@Override
	public <T extends OAuthResponse> T accessToken(String code,
			Class<T> responseClass) {
		Request request = new OAuthRequestBuilder()
				.url(provider.getAccessTokenEndpoint())
				.requestType(provider.getAccessTokenRequestType()).body(config)
				.code(code).build();
		request.addHeader(OAuth.HeaderType.CONTENT_TYPE,
				OAuth.ContentType.URL_ENCODED);
		return new OAuthHttpClient(this.httpClient).send(request,
				responseClass);
	}

	@Override
	public JSONAccessTokenResponse accessJsonToken(String code) {
		return this.accessToken(code, JSONAccessTokenResponse.class);
	}
	
	public void cutomeHttpClient(HttpClient client){
		this.httpClient =client;
	}

}