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Enum member null in Adwords library

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1

1

I'm using the Google Adwords library. To create crendentials there is builder pattern provided:

new OfflineCredentials.Builder()
 .forApi(OfflineCredentials.Api.ADWORDS)
 .fromFile("D:...ads.properties")
 .build()

This call throws a null pointer exception in my app, specifically the argument for the .forApi() method is null. That object is an enum member defined thus:

 public static enum Api implements OAuthConfig {
 ADWORDS("api.adwords.", "https://www.googleapis.com/auth/adwords"),
 AD_MANAGER("api.admanager.", "https://www.googleapis.com/auth/dfp");

 private final String propKeyPrefix;
 private final String scope;

 private Api(String propKeyPrefix, String scope) 
 this.propKeyPrefix =
 Preconditions.checkNotNull(propKeyPrefix, "Null property key prefix for: %s", this);
 this.scope = Preconditions.checkNotNull(scope, "Null scope for: %s", this);
 

Now, how can an enum member be null? And what do I do about it?

Is this a problem with class loading? If that helps, it is a Spring Boot application.

java spring-boot google-adwords

share|improve this question

edited Mar 8 at 12:33

Yassin Hajaj

14.5k72961

asked Mar 8 at 12:10

Stefan FischerStefan Fischer

162211

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Just to be clear: you're saying Api.ADWORDS is null? So you get the NPE in ForApiBuilder.defaultOptionals when it tries to call oAuthConfig.getInternals() ? There error isn't that getInternals() is returning null and the next call failing? (though I'm not sure how that would happen either)
  
  – Rup
  Mar 8 at 12:18
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yes. Evaluating Api.ADWORDS in the debugger results in null. Calling .forApi(Api.ADWORDS) throws NPE. The call to .getInternals() is indeed the first attempt to access members of ADWORDS.
  
  – Stefan Fischer
  Mar 8 at 12:25
  

  
  
  
  

add a comment | 

1

1

I'm using the Google Adwords library. To create crendentials there is builder pattern provided:

new OfflineCredentials.Builder()
 .forApi(OfflineCredentials.Api.ADWORDS)
 .fromFile("D:...ads.properties")
 .build()

This call throws a null pointer exception in my app, specifically the argument for the .forApi() method is null. That object is an enum member defined thus:

 public static enum Api implements OAuthConfig {
 ADWORDS("api.adwords.", "https://www.googleapis.com/auth/adwords"),
 AD_MANAGER("api.admanager.", "https://www.googleapis.com/auth/dfp");

 private final String propKeyPrefix;
 private final String scope;

 private Api(String propKeyPrefix, String scope) 
 this.propKeyPrefix =
 Preconditions.checkNotNull(propKeyPrefix, "Null property key prefix for: %s", this);
 this.scope = Preconditions.checkNotNull(scope, "Null scope for: %s", this);
 

Now, how can an enum member be null? And what do I do about it?

Is this a problem with class loading? If that helps, it is a Spring Boot application.

java spring-boot google-adwords

share|improve this question

edited Mar 8 at 12:33

Yassin Hajaj

14.5k72961

asked Mar 8 at 12:10

Stefan FischerStefan Fischer

162211

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Just to be clear: you're saying Api.ADWORDS is null? So you get the NPE in ForApiBuilder.defaultOptionals when it tries to call oAuthConfig.getInternals() ? There error isn't that getInternals() is returning null and the next call failing? (though I'm not sure how that would happen either)
  
  – Rup
  Mar 8 at 12:18
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yes. Evaluating Api.ADWORDS in the debugger results in null. Calling .forApi(Api.ADWORDS) throws NPE. The call to .getInternals() is indeed the first attempt to access members of ADWORDS.
  
  – Stefan Fischer
  Mar 8 at 12:25
  

  
  
  
  

add a comment | 

I'm using the Google Adwords library. To create crendentials there is builder pattern provided:

new OfflineCredentials.Builder()
 .forApi(OfflineCredentials.Api.ADWORDS)
 .fromFile("D:...ads.properties")
 .build()

This call throws a null pointer exception in my app, specifically the argument for the .forApi() method is null. That object is an enum member defined thus:

 public static enum Api implements OAuthConfig {
 ADWORDS("api.adwords.", "https://www.googleapis.com/auth/adwords"),
 AD_MANAGER("api.admanager.", "https://www.googleapis.com/auth/dfp");

 private final String propKeyPrefix;
 private final String scope;

 private Api(String propKeyPrefix, String scope) 
 this.propKeyPrefix =
 Preconditions.checkNotNull(propKeyPrefix, "Null property key prefix for: %s", this);
 this.scope = Preconditions.checkNotNull(scope, "Null scope for: %s", this);
 

Now, how can an enum member be null? And what do I do about it?

Is this a problem with class loading? If that helps, it is a Spring Boot application.

java spring-boot google-adwords

share|improve this question

edited Mar 8 at 12:33

Yassin Hajaj

14.5k72961

asked Mar 8 at 12:10

Stefan FischerStefan Fischer

162211

new OfflineCredentials.Builder()
 .forApi(OfflineCredentials.Api.ADWORDS)
 .fromFile("D:...ads.properties")
 .build()

 public static enum Api implements OAuthConfig {
 ADWORDS("api.adwords.", "https://www.googleapis.com/auth/adwords"),
 AD_MANAGER("api.admanager.", "https://www.googleapis.com/auth/dfp");

 private final String propKeyPrefix;
 private final String scope;

 private Api(String propKeyPrefix, String scope) 
 this.propKeyPrefix =
 Preconditions.checkNotNull(propKeyPrefix, "Null property key prefix for: %s", this);
 this.scope = Preconditions.checkNotNull(scope, "Null scope for: %s", this);
 

share|improve this question

edited Mar 8 at 12:33

Yassin Hajaj

14.5k72961

asked Mar 8 at 12:10

Stefan FischerStefan Fischer

162211

share|improve this question

edited Mar 8 at 12:33

Yassin Hajaj

14.5k72961

asked Mar 8 at 12:10

Stefan FischerStefan Fischer

162211

edited Mar 8 at 12:33

Yassin Hajaj

14.5k72961

edited Mar 8 at 12:33

Yassin Hajaj

14.5k72961

asked Mar 8 at 12:10

Stefan FischerStefan Fischer

162211

asked Mar 8 at 12:10

Stefan FischerStefan Fischer

162211

1 Answer
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Found it. The Preconditions.checkNotNull threw a NoSuchMethodError, due to conflicting versions. This prevented the enum member from being properly initialized, thus staying null and causing an NPE in turn.

TIL: When an enum member is null, there properly was an error in its constructor.

share|improve this answer

answered Mar 11 at 17:14

Stefan FischerStefan Fischer

162211

add a comment | 

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0

Found it. The Preconditions.checkNotNull threw a NoSuchMethodError, due to conflicting versions. This prevented the enum member from being properly initialized, thus staying null and causing an NPE in turn.

TIL: When an enum member is null, there properly was an error in its constructor.

share|improve this answer

answered Mar 11 at 17:14

Stefan FischerStefan Fischer

162211

add a comment | 

0

Found it. The Preconditions.checkNotNull threw a NoSuchMethodError, due to conflicting versions. This prevented the enum member from being properly initialized, thus staying null and causing an NPE in turn.

TIL: When an enum member is null, there properly was an error in its constructor.

share|improve this answer

answered Mar 11 at 17:14

Stefan FischerStefan Fischer

162211

add a comment | 

Found it. The Preconditions.checkNotNull threw a NoSuchMethodError, due to conflicting versions. This prevented the enum member from being properly initialized, thus staying null and causing an NPE in turn.

TIL: When an enum member is null, there properly was an error in its constructor.

share|improve this answer

answered Mar 11 at 17:14

Stefan FischerStefan Fischer

162211

share|improve this answer

answered Mar 11 at 17:14

Stefan FischerStefan Fischer

162211

answered Mar 11 at 17:14

Stefan FischerStefan Fischer

162211

answered Mar 11 at 17:14

Stefan FischerStefan Fischer

162211