Java.libraries.jersey2.ApiClient.mustache Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of openapi-generator Show documentation
There is a newer version: 7.9.0
package {{invokerPackage}};

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.Invocation;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.Form;
import javax.ws.rs.core.GenericType;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

{{#hasOAuthMethods}}
import com.github.scribejava.core.model.OAuth2AccessToken;
{{/hasOAuthMethods}}
import org.glassfish.jersey.client.ClientConfig;
import org.glassfish.jersey.client.ClientProperties;
import org.glassfish.jersey.client.HttpUrlConnectorProvider;
import org.glassfish.jersey.jackson.JacksonFeature;
import org.glassfish.jersey.media.multipart.FormDataBodyPart;
import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
import org.glassfish.jersey.media.multipart.MultiPart;
import org.glassfish.jersey.media.multipart.MultiPartFeature;

import java.io.IOException;
import java.io.InputStream;

import java.net.URI;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.cert.X509Certificate;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.nio.file.Files;
import java.nio.file.StandardCopyOption;
import org.glassfish.jersey.logging.LoggingFeature;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.Map.Entry;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Date;
{{#jsr310}}
{{#threetenbp}}
import org.threeten.bp.OffsetDateTime;
{{/threetenbp}}
{{^threetenbp}}
import java.time.OffsetDateTime;
{{/threetenbp}}
{{/jsr310}}

import java.net.URLEncoder;

import java.io.File;
import java.io.UnsupportedEncodingException;

import java.text.DateFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import {{invokerPackage}}.auth.Authentication;
import {{invokerPackage}}.auth.HttpBasicAuth;
import {{invokerPackage}}.auth.HttpBearerAuth;
{{#hasHttpSignatureMethods}}
import {{invokerPackage}}.auth.HttpSignatureAuth;
{{/hasHttpSignatureMethods}}
import {{invokerPackage}}.auth.ApiKeyAuth;
{{#hasOAuthMethods}}
import {{invokerPackage}}.auth.OAuth;
{{/hasOAuthMethods}}

{{>generatedAnnotation}}
public class ApiClient{{#jsr310}} extends JavaTimeFormatter{{/jsr310}} {
  protected Map defaultHeaderMap = new HashMap();
  protected Map defaultCookieMap = new HashMap();
  protected String basePath = "{{{basePath}}}";
  protected String userAgent;
  private static final Logger log = Logger.getLogger(ApiClient.class.getName());

  protected List servers = new ArrayList({{#servers}}{{#-first}}Arrays.asList(
{{/-first}}    new ServerConfiguration(
      "{{{url}}}",
      "{{{description}}}{{^description}}No description provided{{/description}}",
      new HashMap(){{#variables}}{{#-first}} {{
{{/-first}}        put("{{{name}}}", new ServerVariable(
          "{{{description}}}{{^description}}No description provided{{/description}}",
          "{{{defaultValue}}}",
          new HashSet(
          {{#enumValues}}
          {{#-first}}
            Arrays.asList(
          {{/-first}}
              "{{{.}}}"{{^-last}},{{/-last}}
          {{#-last}}
            )
          {{/-last}}
          {{/enumValues}}
          )
        ));
      {{#-last}}
      }}{{/-last}}{{/variables}}
    ){{^-last}},{{/-last}}
  {{#-last}}
  ){{/-last}}{{/servers}});
  protected Integer serverIndex = 0;
  protected Map serverVariables = null;
  protected Map> operationServers = new HashMap>() {{
    {{#apiInfo}}
    {{#apis}}
    {{#operations}}
    {{#operation}}
    {{#servers}}
    {{#-first}}
    put("{{{classname}}}.{{{operationId}}}", new ArrayList(Arrays.asList(
    {{/-first}}
      new ServerConfiguration(
        "{{{url}}}",
        "{{{description}}}{{^description}}No description provided{{/description}}",
        new HashMap(){{#variables}}{{#-first}} {{
{{/-first}}          put("{{{name}}}", new ServerVariable(
            "{{{description}}}{{^description}}No description provided{{/description}}",
            "{{{defaultValue}}}",
            new HashSet(
            {{#enumValues}}
            {{#-first}}
              Arrays.asList(
            {{/-first}}
                "{{{.}}}"{{^-last}},{{/-last}}
            {{#-last}}
              )
            {{/-last}}
            {{/enumValues}}
            )
          ));
        {{#-last}}
        }}{{/-last}}{{/variables}}
      ){{^-last}},{{/-last}}
    {{#-last}}
    )));{{/-last}}
    {{/servers}}
    {{/operation}}
    {{/operations}}
    {{/apis}}
    {{/apiInfo}}
  }};
  protected Map operationServerIndex = new HashMap();
  protected Map> operationServerVariables = new HashMap>();
  protected boolean debugging = false;
  protected ClientConfig clientConfig;
  protected int connectionTimeout = 0;
  private int readTimeout = 0;

  protected Client httpClient;
  protected JSON json;
  protected String tempFolderPath = null;

  protected Map authentications;
  protected Map authenticationLookup;

  protected DateFormat dateFormat;

  /**
   * Constructs a new ApiClient with default parameters.
   */
  public ApiClient() {
    this(null);
  }

  /**
   * Constructs a new ApiClient with the specified authentication parameters.
   *
   * @param authMap A hash map containing authentication parameters.
   */
  public ApiClient(Map authMap) {
    json = new JSON();
    httpClient = buildHttpClient();

    this.dateFormat = new RFC3339DateFormat();

    // Set default User-Agent.
    setUserAgent("{{#httpUserAgent}}{{{.}}}{{/httpUserAgent}}{{^httpUserAgent}}OpenAPI-Generator/{{{artifactVersion}}}/java{{/httpUserAgent}}");

    // Setup authentications (key: authentication name, value: authentication).
    authentications = new HashMap();
    Authentication auth = null;
    {{#authMethods}}
    if (authMap != null) {
      auth = authMap.get("{{name}}");
    }
    {{#isBasic}}
    {{#isBasicBasic}}
    if (auth instanceof HttpBasicAuth) {
      authentications.put("{{name}}", auth);
    } else {
      authentications.put("{{name}}", new HttpBasicAuth());
    }
    {{/isBasicBasic}}
    {{#isBasicBearer}}
    if (auth instanceof HttpBearerAuth) {
      authentications.put("{{name}}", auth);
    } else {
      authentications.put("{{name}}", new HttpBearerAuth("{{scheme}}"));
    }
    {{/isBasicBearer}}
    {{#isHttpSignature}}
    if (auth instanceof HttpSignatureAuth) {
      authentications.put("{{name}}", auth);
    }
    {{/isHttpSignature}}
    {{/isBasic}}
    {{#isApiKey}}
    if (auth instanceof ApiKeyAuth) {
      authentications.put("{{name}}", auth);
    } else {
      authentications.put("{{name}}", new ApiKeyAuth({{#isKeyInHeader}}"header"{{/isKeyInHeader}}{{^isKeyInHeader}}"query"{{/isKeyInHeader}}, "{{keyParamName}}"));
    }
    {{/isApiKey}}
    {{#isOAuth}}
    if (auth instanceof OAuth) {
      authentications.put("{{name}}", auth);
    } else {
      authentications.put("{{name}}", new OAuth(basePath, "{{tokenUrl}}"));
    }
    {{/isOAuth}}
    {{/authMethods}}
    // Prevent the authentications from being modified.
    authentications = Collections.unmodifiableMap(authentications);

    // Setup authentication lookup (key: authentication alias, value: authentication name)
    authenticationLookup = new HashMap();{{#authMethods}}{{#vendorExtensions.x-auth-id-alias}}
    authenticationLookup.put("{{name}}", "{{.}}");{{/vendorExtensions.x-auth-id-alias}}{{/authMethods}}
  }

  /**
   * Gets the JSON instance to do JSON serialization and deserialization.
   *
   * @return JSON
   */
  public JSON getJSON() {
    return json;
  }

  public Client getHttpClient() {
    return httpClient;
  }

  public ApiClient setHttpClient(Client httpClient) {
    this.httpClient = httpClient;
    return this;
  }

  /**
   * Returns the base URL to the location where the OpenAPI document is being served.
   *
   * @return The base URL to the target host.
   */
  public String getBasePath() {
    return basePath;
  }

  /**
   * Sets the base URL to the location where the OpenAPI document is being served.
   *
   * @param basePath The base URL to the target host.
   */
  public ApiClient setBasePath(String basePath) {
    this.basePath = basePath;
    {{#hasOAuthMethods}}
    setOauthBasePath(basePath);
    {{/hasOAuthMethods}}
    return this;
  }

  public List getServers() {
    return servers;
  }

  public ApiClient setServers(List servers) {
    this.servers = servers;
    updateBasePath();
    return this;
  }

  public Integer getServerIndex() {
    return serverIndex;
  }

  public ApiClient setServerIndex(Integer serverIndex) {
    this.serverIndex = serverIndex;
    updateBasePath();
    return this;
  }

  public Map getServerVariables() {
    return serverVariables;
  }

  public ApiClient setServerVariables(Map serverVariables) {
    this.serverVariables = serverVariables;
    updateBasePath();
    return this;
  }

  private void updateBasePath() {
    if (serverIndex != null) {
        setBasePath(servers.get(serverIndex).URL(serverVariables));
    }
  }

  {{#hasOAuthMethods}}
  private void setOauthBasePath(String basePath) {
    for(Authentication auth : authentications.values()) {
      if (auth instanceof OAuth) {
        ((OAuth) auth).setBasePath(basePath);
      }
    }
  }

  {{/hasOAuthMethods}}
  /**
   * Get authentications (key: authentication name, value: authentication).
   *
   * @return Map of authentication object
   */
  public Map getAuthentications() {
    return authentications;
  }

  /**
   * Get authentication for the given name.
   *
   * @param authName The authentication name
   * @return The authentication, null if not found
   */
  public Authentication getAuthentication(String authName) {
    return authentications.get(authName);
  }

  /**
   * Helper method to set username for the first HTTP basic authentication.
   *
   * @param username Username
   */
  public ApiClient setUsername(String username) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof HttpBasicAuth) {
        ((HttpBasicAuth) auth).setUsername(username);
        return this;
      }
    }
    throw new RuntimeException("No HTTP basic authentication configured!");
  }

  /**
   * Helper method to set password for the first HTTP basic authentication.
   *
   * @param password Password
   */
  public ApiClient setPassword(String password) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof HttpBasicAuth) {
        ((HttpBasicAuth) auth).setPassword(password);
        return this;
      }
    }
    throw new RuntimeException("No HTTP basic authentication configured!");
  }

  /**
   * Helper method to set API key value for the first API key authentication.
   *
   * @param apiKey API key
   */
  public ApiClient setApiKey(String apiKey) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof ApiKeyAuth) {
        ((ApiKeyAuth) auth).setApiKey(apiKey);
        return this;
      }
    }
    throw new RuntimeException("No API key authentication configured!");
  }

  /**
   * Helper method to configure authentications which respects aliases of API keys.
   *
   * @param secrets Hash map from authentication name to its secret.
   */
  public ApiClient configureApiKeys(Map secrets) {
    for (Map.Entry authEntry : authentications.entrySet()) {
      Authentication auth = authEntry.getValue();
      if (auth instanceof ApiKeyAuth) {
        String name = authEntry.getKey();
        // respect x-auth-id-alias property
        name = authenticationLookup.containsKey(name) ? authenticationLookup.get(name) : name;
        if (secrets.containsKey(name)) {
          ((ApiKeyAuth) auth).setApiKey(secrets.get(name));
        }
      }
    }
    return this;
  }

  /**
   * Helper method to set API key prefix for the first API key authentication.
   *
   * @param apiKeyPrefix API key prefix
   */
  public ApiClient setApiKeyPrefix(String apiKeyPrefix) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof ApiKeyAuth) {
        ((ApiKeyAuth) auth).setApiKeyPrefix(apiKeyPrefix);
        return this;
      }
    }
    throw new RuntimeException("No API key authentication configured!");
  }

  /**
   * Helper method to set bearer token for the first Bearer authentication.
   *
   * @param bearerToken Bearer token
   */
  public ApiClient setBearerToken(String bearerToken) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof HttpBearerAuth) {
        ((HttpBearerAuth) auth).setBearerToken(bearerToken);
        return this;
      }
    }
    throw new RuntimeException("No Bearer authentication configured!");
  }


  {{#hasOAuthMethods}}
  /**
   * Helper method to set access token for the first OAuth2 authentication.
   * @param accessToken Access token
   */
  public ApiClient setAccessToken(String accessToken) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof OAuth) {
        ((OAuth) auth).setAccessToken(accessToken);
        return this;
      }
    }
    throw new RuntimeException("No OAuth2 authentication configured!");
  }

  /**
   * Helper method to set the credentials for the first OAuth2 authentication.
   *
   * @param clientId the client ID
   * @param clientSecret the client secret
   */
  public ApiClient setOauthCredentials(String clientId, String clientSecret) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof OAuth) {
        ((OAuth) auth).setCredentials(clientId, clientSecret, isDebugging());
        return this;
      }
    }
    throw new RuntimeException("No OAuth2 authentication configured!");
  }

  /**
   * Helper method to set the password flow for the first OAuth2 authentication.
   *
   * @param username the user name
   * @param password the user password
   */
  public ApiClient setOauthPasswordFlow(String username, String password) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof OAuth) {
        ((OAuth) auth).usePasswordFlow(username, password);
        return this;
      }
    }
    throw new RuntimeException("No OAuth2 authentication configured!");
  }

  /**
   * Helper method to set the authorization code flow for the first OAuth2 authentication.
   *
   * @param code the authorization code
   */
  public ApiClient setOauthAuthorizationCodeFlow(String code) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof OAuth) {
        ((OAuth) auth).useAuthorizationCodeFlow(code);
        return this;
      }
    }
    throw new RuntimeException("No OAuth2 authentication configured!");
  }

  /**
   * Helper method to set the scopes for the first OAuth2 authentication.
   *
   * @param scope the oauth scope
   */
  public ApiClient setOauthScope(String scope) {
    for (Authentication auth : authentications.values()) {
      if (auth instanceof OAuth) {
        ((OAuth) auth).setScope(scope);
        return this;
      }
    }
    throw new RuntimeException("No OAuth2 authentication configured!");
  }

  {{/hasOAuthMethods}}
  /**
   * Set the User-Agent header's value (by adding to the default header map).
   * @param userAgent Http user agent
   * @return API client
   */
  public ApiClient setUserAgent(String userAgent) {
    userAgent = userAgent;
    addDefaultHeader("User-Agent", userAgent);
    return this;
  }

  /**
   * Get the User-Agent header's value.
   * @return User-Agent string
   */
  public String getUserAgent(){
    return userAgent;
  }

  /**
   * Add a default header.
   *
   * @param key The header's key
   * @param value The header's value
   * @return API client
   */
  public ApiClient addDefaultHeader(String key, String value) {
    defaultHeaderMap.put(key, value);
    return this;
  }

  /**
   * Add a default cookie.
   *
   * @param key The cookie's key
   * @param value The cookie's value
   * @return API client
   */
  public ApiClient addDefaultCookie(String key, String value) {
    defaultCookieMap.put(key, value);
    return this;
  }

  /**
   * Gets the client config.
   * @return Client config
   */
  public ClientConfig getClientConfig() {
    return clientConfig;
  }

  /**
   * Set the client config.
   *
   * @param clientConfig Set the client config
   * @return API client
   */
  public ApiClient setClientConfig(ClientConfig clientConfig) {
    this.clientConfig = clientConfig;
    // Rebuild HTTP Client according to the new "clientConfig" value.
    this.httpClient = buildHttpClient();
    return this;
  }

  /**
   * Check that whether debugging is enabled for this API client.
   * @return True if debugging is switched on
   */
  public boolean isDebugging() {
    return debugging;
  }

  /**
   * Enable/disable debugging for this API client.
   *
   * @param debugging To enable (true) or disable (false) debugging
   * @return API client
   */
  public ApiClient setDebugging(boolean debugging) {
    this.debugging = debugging;
    // Rebuild HTTP Client according to the new "debugging" value.
    this.httpClient = buildHttpClient();
    return this;
  }

  /**
   * The path of temporary folder used to store downloaded files from endpoints
   * with file response. The default value is null, i.e. using
   * the system's default tempopary folder.
   *
   * @return Temp folder path
   */
  public String getTempFolderPath() {
    return tempFolderPath;
  }

  /**
   * Set temp folder path
   * @param tempFolderPath Temp folder path
   * @return API client
   */
  public ApiClient setTempFolderPath(String tempFolderPath) {
    this.tempFolderPath = tempFolderPath;
    return this;
  }

  /**
   * Connect timeout (in milliseconds).
   * @return Connection timeout
   */
  public int getConnectTimeout() {
    return connectionTimeout;
  }

  /**
   * Set the connect timeout (in milliseconds).
   * A value of 0 means no timeout, otherwise values must be between 1 and
   * {@link Integer#MAX_VALUE}.
   * @param connectionTimeout Connection timeout in milliseconds
   * @return API client
   */
  public ApiClient setConnectTimeout(int connectionTimeout) {
    this.connectionTimeout = connectionTimeout;
    httpClient.property(ClientProperties.CONNECT_TIMEOUT, connectionTimeout);
    return this;
  }

  /**
   * read timeout (in milliseconds).
   * @return Read timeout
   */
  public int getReadTimeout() {
    return readTimeout;
  }

  /**
   * Set the read timeout (in milliseconds).
   * A value of 0 means no timeout, otherwise values must be between 1 and
   * {@link Integer#MAX_VALUE}.
   * @param readTimeout Read timeout in milliseconds
   * @return API client
   */
  public ApiClient setReadTimeout(int readTimeout) {
    this.readTimeout = readTimeout;
    httpClient.property(ClientProperties.READ_TIMEOUT, readTimeout);
    return this;
  }

  /**
   * Get the date format used to parse/format date parameters.
   * @return Date format
   */
  public DateFormat getDateFormat() {
    return dateFormat;
  }

  /**
   * Set the date format used to parse/format date parameters.
   * @param dateFormat Date format
   * @return API client
   */
  public ApiClient setDateFormat(DateFormat dateFormat) {
    this.dateFormat = dateFormat;
    // also set the date format for model (de)serialization with Date properties
    this.json.setDateFormat((DateFormat) dateFormat.clone());
    return this;
  }

  /**
   * Parse the given string into Date object.
   * @param str String
   * @return Date
   */
  public Date parseDate(String str) {
    try {
      return dateFormat.parse(str);
    } catch (java.text.ParseException e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * Format the given Date object into string.
   * @param date Date
   * @return Date in string format
   */
  public String formatDate(Date date) {
    return dateFormat.format(date);
  }

  /**
   * Format the given parameter object into string.
   * @param param Object
   * @return Object in string format
   */
  public String parameterToString(Object param) {
    if (param == null) {
      return "";
    } else if (param instanceof Date) {
      return formatDate((Date) param);
    } {{#jsr310}}else if (param instanceof OffsetDateTime) {
      return formatOffsetDateTime((OffsetDateTime) param);
    } {{/jsr310}}else if (param instanceof Collection) {
      StringBuilder b = new StringBuilder();
      for(Object o : (Collection)param) {
        if(b.length() > 0) {
          b.append(',');
        }
        b.append(String.valueOf(o));
      }
      return b.toString();
    } else {
      return String.valueOf(param);
    }
  }

  /*
   * Format to {@code Pair} objects.
   * @param collectionFormat Collection format
   * @param name Name
   * @param value Value
   * @return List of pairs
   */
  public List parameterToPairs(String collectionFormat, String name, Object value){
    List params = new ArrayList();

    // preconditions
    if (name == null || name.isEmpty() || value == null) return params;

    Collection valueCollection;
    if (value instanceof Collection) {
      valueCollection = (Collection) value;
    } else {
      params.add(new Pair(name, parameterToString(value)));
      return params;
    }

    if (valueCollection.isEmpty()){
      return params;
    }

    // get the collection format (default: csv)
    String format = (collectionFormat == null || collectionFormat.isEmpty() ? "csv" : collectionFormat);

    // create the params based on the collection format
    if ("multi".equals(format)) {
      for (Object item : valueCollection) {
        params.add(new Pair(name, parameterToString(item)));
      }

      return params;
    }

    String delimiter = ",";

    if ("csv".equals(format)) {
      delimiter = ",";
    } else if ("ssv".equals(format)) {
      delimiter = " ";
    } else if ("tsv".equals(format)) {
      delimiter = "\t";
    } else if ("pipes".equals(format)) {
      delimiter = "|";
    }

    StringBuilder sb = new StringBuilder() ;
    for (Object item : valueCollection) {
      sb.append(delimiter);
      sb.append(parameterToString(item));
    }

    params.add(new Pair(name, sb.substring(1)));

    return params;
  }

  /**
   * Check if the given MIME is a JSON MIME.
   * JSON MIME examples:
   *   application/json
   *   application/json; charset=UTF8
   *   APPLICATION/JSON
   *   application/vnd.company+json
   * "* / *" is also default to JSON
   * @param mime MIME
   * @return True if the MIME type is JSON
   */
  public boolean isJsonMime(String mime) {
    String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
    return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
  }

  /**
   * Select the Accept header's value from the given accepts array:
   *   if JSON exists in the given array, use it;
   *   otherwise use all of them (joining into a string)
   *
   * @param accepts The accepts array to select from
   * @return The Accept header to use. If the given array is empty,
   *   null will be returned (not to set the Accept header explicitly).
   */
  public String selectHeaderAccept(String[] accepts) {
    if (accepts.length == 0) {
      return null;
    }
    for (String accept : accepts) {
      if (isJsonMime(accept)) {
        return accept;
      }
    }
    return StringUtil.join(accepts, ",");
  }

  /**
   * Select the Content-Type header's value from the given array:
   *   if JSON exists in the given array, use it;
   *   otherwise use the first one of the array.
   *
   * @param contentTypes The Content-Type array to select from
   * @return The Content-Type header to use. If the given array is empty,
   *   JSON will be used.
   */
  public String selectHeaderContentType(String[] contentTypes) {
    if (contentTypes.length == 0) {
      return "application/json";
    }
    for (String contentType : contentTypes) {
      if (isJsonMime(contentType)) {
        return contentType;
      }
    }
    return contentTypes[0];
  }

  /**
   * Escape the given string to be used as URL query value.
   * @param str String
   * @return Escaped string
   */
  public String escapeString(String str) {
    try {
      return URLEncoder.encode(str, "utf8").replaceAll("\\+", "%20");
    } catch (UnsupportedEncodingException e) {
      return str;
    }
  }

  /**
   * Serialize the given Java object into string entity according the given
   * Content-Type (only JSON is supported for now).
   * @param obj Object
   * @param formParams Form parameters
   * @param contentType Context type
   * @return Entity
   * @throws ApiException API exception
   */
  public Entity serialize(Object obj, Map formParams, String contentType, boolean isBodyNullable) throws ApiException {
    Entity entity;
    if (contentType.startsWith("multipart/form-data")) {
      MultiPart multiPart = new MultiPart();
      for (Entry param: formParams.entrySet()) {
        if (param.getValue() instanceof File) {
          File file = (File) param.getValue();
          FormDataContentDisposition contentDisp = FormDataContentDisposition.name(param.getKey())
              .fileName(file.getName()).size(file.length()).build();
          multiPart.bodyPart(new FormDataBodyPart(contentDisp, file, MediaType.APPLICATION_OCTET_STREAM_TYPE));
        } else {
          FormDataContentDisposition contentDisp = FormDataContentDisposition.name(param.getKey()).build();
          multiPart.bodyPart(new FormDataBodyPart(contentDisp, parameterToString(param.getValue())));
        }
      }
      entity = Entity.entity(multiPart, MediaType.MULTIPART_FORM_DATA_TYPE);
    } else if (contentType.startsWith("application/x-www-form-urlencoded")) {
      Form form = new Form();
      for (Entry param: formParams.entrySet()) {
        form.param(param.getKey(), parameterToString(param.getValue()));
      }
      entity = Entity.entity(form, MediaType.APPLICATION_FORM_URLENCODED_TYPE);
    } else {
      // We let jersey handle the serialization
      if (isBodyNullable) { // payload is nullable
        if (obj instanceof String) {
          entity = Entity.entity(obj == null ? "null" : "\"" + ((String)obj).replaceAll("\"", Matcher.quoteReplacement("\\\"")) + "\"", contentType);
        } else {
          entity = Entity.entity(obj == null ? "null" : obj, contentType);
        }
      } else {
        if (obj instanceof String) {
          entity = Entity.entity(obj == null ? "" : "\"" + ((String)obj).replaceAll("\"", Matcher.quoteReplacement("\\\"")) + "\"", contentType);
        } else {
          entity = Entity.entity(obj == null ? "" : obj, contentType);
        }
      }
    }
    return entity;
  }

  /**
   * Serialize the given Java object into string according the given
   * Content-Type (only JSON, HTTP form is supported for now).
   * @param obj Object
   * @param formParams Form parameters
   * @param contentType Context type
   * @param isBodyNullable True if the body is nullable
   * @return String
   * @throws ApiException API exception
   */
  public String serializeToString(Object obj, Map formParams, String contentType, boolean isBodyNullable) throws ApiException {
    try {
      if (contentType.startsWith("multipart/form-data")) {
        throw new ApiException("multipart/form-data not yet supported for serializeToString (http signature authentication)");
      } else if (contentType.startsWith("application/x-www-form-urlencoded")) {
        String formString = "";
        for (Entry param : formParams.entrySet()) {
          formString = param.getKey() + "=" + URLEncoder.encode(parameterToString(param.getValue()), "UTF-8") + "&";
        }

        if (formString.length() == 0) { // empty string
          return formString;
        } else {
          return formString.substring(0, formString.length() - 1);
        }
      } else {
        if (isBodyNullable) {
          return obj == null ? "null" : json.getMapper().writeValueAsString(obj);
        } else {
          return obj == null ? "" : json.getMapper().writeValueAsString(obj);
        }
      }
    } catch (Exception ex) {
      throw new ApiException("Failed to perform serializeToString: " + ex.toString());
    }
  }

  /**
   * Deserialize response body to Java object according to the Content-Type.
   * @param  Type
   * @param response Response
   * @param returnType Return type
   * @return Deserialize object
   * @throws ApiException API exception
   */
  @SuppressWarnings("unchecked")
  public  T deserialize(Response response, GenericType returnType) throws ApiException {
    if (response == null || returnType == null) {
      return null;
    }

    if ("byte[]".equals(returnType.toString())) {
      // Handle binary response (byte array).
      return (T) response.readEntity(byte[].class);
    } else if (returnType.getRawType() == File.class) {
      // Handle file downloading.
      T file = (T) downloadFileFromResponse(response);
      return file;
    }

    String contentType = null;
    List