Can't process function that returns boolean

[4ntoine]

contract:

pragma solidity ^0.4.0;
contract SomeContract {
  ...
  mapping (string => bool) keys;
  ...
  function hasFeature(string featureKey) public constant returns (bool) {
      return keys[featureKey];
  }

while trying to generate wrapper getting the following exception:

[ERROR] Failed to execute goal org.web3j:web3j-maven-plugin:0.1.3:generate-sources (default-cli) on project ethereum: Execution default-cli of goal org.web3j:web3j-maven-plugin:0.1.3:generate-sources failed: invalid type parameter: boolean -> [Help 1]

I'm having installed solidity compiler 0.4.18 on mac and plugin found it:

[INFO] ------------------------------------------------------------------------
[INFO] Building ethereum 1.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- web3j-maven-plugin:0.1.3:generate-sources (default-cli) @ ethereum ---
[INFO] process 'SomeContract.sol'
[INFO] Solidity Compiler found
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.993 s
[INFO] Finished at: 2017-11-04T12:42:32+05:00
[INFO] Final Memory: 16M/306M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.web3j:web3j-maven-plugin:0.1.3:generate-sources (default-cli) on project ethereum: Execution default-cli of goal org.web3j:web3j-maven-plugin:0.1.3:generate-sources failed: invalid type parameter: boolean -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

The code can be compiled and function called in Remix. Also if i change return type to uint8 and change the function to return uint8 (1 or 0) everything is okay.

[conor10]

This is an issue with web3j - I'll push out a release with a fix shortly.

All that is requires is to change line 350 of SolidityFunctionWrapper to be:

return TypeName.get(Boolean.class);  // boolean cannot be a parameterized type

[4ntoine]

Thanks for the quick investigation, waiting for the fix..

[conor10]

New release pushed out.

[conor10]

@h2mch please can you close once the plugin has been updated to web3j 3.0.2.

[h2mch]

update to version 3.0.2. new release 0.1.4 done