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handlebars.Java.libraries.retrofit.ApiClient.mustache Maven / Gradle / Ivy
package {{invokerPackage}};
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Type;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.oltu.oauth2.client.request.OAuthClientRequest.AuthenticationRequestBuilder;
import org.apache.oltu.oauth2.client.request.OAuthClientRequest.TokenRequestBuilder;
import org.joda.time.DateTime;
import org.joda.time.LocalDate;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
import retrofit.RestAdapter;
import retrofit.client.OkClient;
import retrofit.converter.ConversionException;
import retrofit.converter.Converter;
import retrofit.converter.GsonConverter;
import retrofit.mime.TypedByteArray;
import retrofit.mime.TypedInput;
import retrofit.mime.TypedOutput;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonParseException;
import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;
import com.squareup.okhttp.Interceptor;
import com.squareup.okhttp.OkHttpClient;
import {{invokerPackage}}.auth.HttpBasicAuth;
import {{invokerPackage}}.auth.ApiKeyAuth;
import {{invokerPackage}}.auth.OAuth;
import {{invokerPackage}}.auth.OAuth.AccessTokenListener;
import {{invokerPackage}}.auth.OAuthFlow;
public class ApiClient {
private Map apiAuthorizations;
private OkHttpClient okClient;
private RestAdapter.Builder adapterBuilder;
public ApiClient() {
apiAuthorizations = new LinkedHashMap();
createDefaultAdapter();
}
public ApiClient(String[] authNames) {
this();
for(String authName : authNames) {
{{#hasAuthMethods}}
Interceptor auth = null;
{{#authMethods}}if ("{{name}}".equals(authName)) {
{{#is this 'basic'}}
auth = new HttpBasicAuth();
{{/is}}
{{#is this 'api-key'}}
auth = new ApiKeyAuth({{#is this 'key-in-header'}}"header"{{/is}}{{#isNot this 'key-in-header'}}"query"{{/isNot}}, "{{keyParamName}}");{{/is}}
{{#is this 'oauth'}}
auth = new OAuth(OAuthFlow.{{flow}}, "{{authorizationUrl}}", "{{tokenUrl}}", "{{#each scopes}}{{@key}}{{^@last}}, {{/@last}}{{/each}}");
{{/is}}
} else {{/authMethods}}{
throw new RuntimeException("auth name \"" + authName + "\" not found in available auth names");
}
addAuthorization(authName, auth);
{{/hasAuthMethods}}
{{^hasAuthMethods}}
throw new RuntimeException("auth name \"" + authName + "\" not found in available auth names");
{{/hasAuthMethods}}
}
}
/**
* Basic constructor for single auth name
* @param authName Authentication name
*/
public ApiClient(String authName) {
this(new String[]{authName});
}
/**
* Helper constructor for single api key
* @param authName Authentication name
* @param apiKey API key
*/
public ApiClient(String authName, String apiKey) {
this(authName);
this.setApiKey(apiKey);
}
/**
* Helper constructor for single basic auth or password oauth2
* @param authName Authentication name
* @param username Username
* @param password Password
*/
public ApiClient(String authName, String username, String password) {
this(authName);
this.setCredentials(username, password);
}
/**
* Helper constructor for single password oauth2
* @param authName Authentication name
* @param clientId Client ID
* @param secret Client secret
* @param username Username
* @param password Password
*/
public ApiClient(String authName, String clientId, String secret, String username, String password) {
this(authName);
this.getTokenEndPoint()
.setClientId(clientId)
.setClientSecret(secret)
.setUsername(username)
.setPassword(password);
}
public void createDefaultAdapter() {
Gson gson = new GsonBuilder()
.setDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ")
.registerTypeAdapter(DateTime.class, new DateTimeTypeAdapter())
.registerTypeAdapter(LocalDate.class, new LocalDateTypeAdapter())
.create();
okClient = new OkHttpClient();
adapterBuilder = new RestAdapter
.Builder()
.setEndpoint("{{{basePath}}}")
.setClient(new OkClient(okClient))
.setConverter(new GsonConverterWrapper(gson));
}
public S createService(Class serviceClass) {
return adapterBuilder.build().create(serviceClass);
}
/**
* Helper method to configure the first api key found
* @param apiKey API key
*/
private void setApiKey(String apiKey) {
for(Interceptor apiAuthorization : apiAuthorizations.values()) {
if (apiAuthorization instanceof ApiKeyAuth) {
ApiKeyAuth keyAuth = (ApiKeyAuth) apiAuthorization;
keyAuth.setApiKey(apiKey);
return;
}
}
}
/**
* Helper method to configure the username/password for basic auth or password oauth
* @param username Username
* @param password Password
*/
private void setCredentials(String username, String password) {
for(Interceptor apiAuthorization : apiAuthorizations.values()) {
if (apiAuthorization instanceof HttpBasicAuth) {
HttpBasicAuth basicAuth = (HttpBasicAuth) apiAuthorization;
basicAuth.setCredentials(username, password);
return;
}
if (apiAuthorization instanceof OAuth) {
OAuth oauth = (OAuth) apiAuthorization;
oauth.getTokenRequestBuilder().setUsername(username).setPassword(password);
return;
}
}
}
/**
* Helper method to configure the token endpoint of the first oauth found in the apiAuthorizations (there should be only one)
* @return Token request builder
*/
public TokenRequestBuilder getTokenEndPoint() {
for(Interceptor apiAuthorization : apiAuthorizations.values()) {
if (apiAuthorization instanceof OAuth) {
OAuth oauth = (OAuth) apiAuthorization;
return oauth.getTokenRequestBuilder();
}
}
return null;
}
/**
* Helper method to configure authorization endpoint of the first oauth found in the apiAuthorizations (there should be only one)
* @return Authentication request builder
*/
public AuthenticationRequestBuilder getAuthorizationEndPoint() {
for(Interceptor apiAuthorization : apiAuthorizations.values()) {
if (apiAuthorization instanceof OAuth) {
OAuth oauth = (OAuth) apiAuthorization;
return oauth.getAuthenticationRequestBuilder();
}
}
return null;
}
/**
* Helper method to pre-set the oauth access token of the first oauth found in the apiAuthorizations (there should be only one)
* @param accessToken Access token
*/
public void setAccessToken(String accessToken) {
for(Interceptor apiAuthorization : apiAuthorizations.values()) {
if (apiAuthorization instanceof OAuth) {
OAuth oauth = (OAuth) apiAuthorization;
oauth.setAccessToken(accessToken);
return;
}
}
}
/**
* Helper method to configure the oauth accessCode/implicit flow parameters
* @param clientId Client ID
* @param clientSecret Client secret
* @param redirectURI Redirect URI
*/
public void configureAuthorizationFlow(String clientId, String clientSecret, String redirectURI) {
for(Interceptor apiAuthorization : apiAuthorizations.values()) {
if (apiAuthorization instanceof OAuth) {
OAuth oauth = (OAuth) apiAuthorization;
oauth.getTokenRequestBuilder()
.setClientId(clientId)
.setClientSecret(clientSecret)
.setRedirectURI(redirectURI);
oauth.getAuthenticationRequestBuilder()
.setClientId(clientId)
.setRedirectURI(redirectURI);
return;
}
}
}
/**
* Configures a listener which is notified when a new access token is received.
* @param accessTokenListener Access token listener
*/
public void registerAccessTokenListener(AccessTokenListener accessTokenListener) {
for(Interceptor apiAuthorization : apiAuthorizations.values()) {
if (apiAuthorization instanceof OAuth) {
OAuth oauth = (OAuth) apiAuthorization;
oauth.registerAccessTokenListener(accessTokenListener);
return;
}
}
}
/**
* Adds an authorization to be used by the client
* @param authName Authentication name
* @param authorization Authorization
*/
public void addAuthorization(String authName, Interceptor authorization) {
if (apiAuthorizations.containsKey(authName)) {
throw new RuntimeException("auth name \"" + authName + "\" already in api authorizations");
}
apiAuthorizations.put(authName, authorization);
okClient.interceptors().add(authorization);
}
public Map getApiAuthorizations() {
return apiAuthorizations;
}
public void setApiAuthorizations(Map apiAuthorizations) {
this.apiAuthorizations = apiAuthorizations;
}
public RestAdapter.Builder getAdapterBuilder() {
return adapterBuilder;
}
public void setAdapterBuilder(RestAdapter.Builder adapterBuilder) {
this.adapterBuilder = adapterBuilder;
}
public OkHttpClient getOkClient() {
return okClient;
}
public void addAuthsToOkClient(OkHttpClient okClient) {
for(Interceptor apiAuthorization : apiAuthorizations.values()) {
okClient.interceptors().add(apiAuthorization);
}
}
/**
* Clones the okClient given in parameter, adds the auth interceptors and uses it to configure the RestAdapter
* @param okClient OkHttp client
*/
public void configureFromOkclient(OkHttpClient okClient) {
OkHttpClient clone = okClient.clone();
addAuthsToOkClient(clone);
adapterBuilder.setClient(new OkClient(clone));
}
}
/**
* This wrapper is to take care of this case:
* when the deserialization fails due to JsonParseException and the
* expected type is String, then just return the body string.
*/
class GsonConverterWrapper implements Converter {
private GsonConverter converter;
public GsonConverterWrapper(Gson gson) {
converter = new GsonConverter(gson);
}
@Override public Object fromBody(TypedInput body, Type type) throws ConversionException {
byte[] bodyBytes = readInBytes(body);
TypedByteArray newBody = new TypedByteArray(body.mimeType(), bodyBytes);
try {
return converter.fromBody(newBody, type);
} catch (ConversionException e) {
if (e.getCause() instanceof JsonParseException && type.equals(String.class)) {
return new String(bodyBytes);
} else {
throw e;
}
}
}
@Override public TypedOutput toBody(Object object) {
return converter.toBody(object);
}
private byte[] readInBytes(TypedInput body) throws ConversionException {
InputStream in = null;
try {
in = body.in();
ByteArrayOutputStream os = new ByteArrayOutputStream();
byte[] buffer = new byte[0xFFFF];
for (int len; (len = in.read(buffer)) != -1;)
os.write(buffer, 0, len);
os.flush();
return os.toByteArray();
} catch (IOException e) {
throw new ConversionException(e);
} finally {
if (in != null) {
try {
in.close();
} catch (IOException ignored) {
}
}
}
}
}
/**
* Gson TypeAdapter for Joda DateTime type
*/
class DateTimeTypeAdapter extends TypeAdapter {
private final DateTimeFormatter parseFormatter = ISODateTimeFormat.dateOptionalTimeParser();
private final DateTimeFormatter printFormatter = ISODateTimeFormat.dateTime();
@Override
public void write(JsonWriter out, DateTime date) throws IOException {
if (date == null) {
out.nullValue();
} else {
out.value(printFormatter.print(date));
}
}
@Override
public DateTime read(JsonReader in) throws IOException {
switch (in.peek()) {
case NULL:
in.nextNull();
return null;
default:
String date = in.nextString();
return parseFormatter.parseDateTime(date);
}
}
}
/**
* Gson TypeAdapter for Joda DateTime type
*/
class LocalDateTypeAdapter extends TypeAdapter {
private final DateTimeFormatter formatter = ISODateTimeFormat.date();
@Override
public void write(JsonWriter out, LocalDate date) throws IOException {
if (date == null) {
out.nullValue();
} else {
out.value(formatter.print(date));
}
}
@Override
public LocalDate read(JsonReader in) throws IOException {
switch (in.peek()) {
case NULL:
in.nextNull();
return null;
default:
String date = in.nextString();
return formatter.parseLocalDate(date);
}
}
}
