Package org.codehaus.groovy.control.customizers

## Class SecureASTCustomizer

- java.lang.Object
- - org.codehaus.groovy.control.CompilationUnit.PrimaryClassNodeOperation
  - - org.codehaus.groovy.control.customizers.CompilationCustomizer
    - - org.codehaus.groovy.control.customizers.SecureASTCustomizer

-     public class SecureASTCustomizer
      extends CompilationCustomizer

  This customizer allows securing source code by controlling what code constructs are permitted. This is typically done when using Groovy for its scripting or domain specific language (DSL) features. For example, if you only want to allow arithmetic operations in a groovy shell, you can configure this customizer to restrict package imports, method calls and so on.

  Most of the security customization options found in this class work with either allowed or disallowed lists. This means that, for a single option, you can set an allowed list OR a disallowed list, but not both. You can mix allowed/disallowed strategies for different options. For example, you can have an allowed import list and a disallowed tokens list.

  The recommended way of securing shells is to use allowed lists because it is guaranteed that future features of the Groovy language won't be accidentally allowed unless explicitly added to the allowed list. Using disallowed lists, you can limit the features of the language constructs supported by your shell by opting out, but new language features are then implicitly also available and this may not be desirable. The implication is that you might need to update your configuration with each new release.

  If neither an allowed list nor a disallowed list is set, then everything is permitted.

  Combinations of import and star import constraints are authorized as long as you use the same type of list for both. For example, you may use an import allowed list and a star import allowed list together, but you cannot use an import allowed list with a star import disallowed list. Static imports are handled separately, meaning that disallowing an import does not prevent from allowing a static import.

  Eventually, if the features provided here are not sufficient, you may implement custom AST filtering handlers, either implementing the `SecureASTCustomizer.StatementChecker` interface or `SecureASTCustomizer.ExpressionChecker` interface then register your handlers thanks to the `addExpressionCheckers(org.codehaus.groovy.control.customizers.SecureASTCustomizer.ExpressionChecker...)` and `addStatementCheckers(org.codehaus.groovy.control.customizers.SecureASTCustomizer.StatementChecker...)` methods.

  Here is an example of usage. We will create a groovy classloader which only supports arithmetic operations and imports the `java.lang.Math` classes by default.

       final ImportCustomizer imports = new ImportCustomizer().addStaticStars('java.lang.Math') // add static import of java.lang.Math
           final SecureASTCustomizer secure = new SecureASTCustomizer()
           secure.with {
               closuresAllowed = false
               methodDefinitionAllowed = false

               allowedImports = []
               allowedStaticImports = []
               allowedStaticStarImports = ['java.lang.Math'] // only java.lang.Math is allowed

               allowedTokens = [
                       PLUS,
                       MINUS,
                       MULTIPLY,
                       DIVIDE,
                       MOD,
                       POWER,
                       PLUS_PLUS,
                       MINUS_MINUS,
                       COMPARE_EQUAL,
                       COMPARE_NOT_EQUAL,
                       COMPARE_LESS_THAN,
                       COMPARE_LESS_THAN_EQUAL,
                       COMPARE_GREATER_THAN,
                       COMPARE_GREATER_THAN_EQUAL,
               ].asImmutable()

               allowedConstantTypesClasses = [
                       Integer,
                       Float,
                       Long,
                       Double,
                       BigDecimal,
                       Integer.TYPE,
                       Long.TYPE,
                       Float.TYPE,
                       Double.TYPE
               ].asImmutable()

               allowedReceiversClasses = [
                       Math,
                       Integer,
                       Float,
                       Double,
                       Long,
                       BigDecimal
               ].asImmutable()
           }
           CompilerConfiguration config = new CompilerConfiguration()
           config.addCompilationCustomizers(imports, secure)
           GroovyClassLoader loader = new GroovyClassLoader(this.class.classLoader, config)

  Since:
    1.8.0

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class | Description
    --- | --- | ---
    `static interface` | `SecureASTCustomizer.ExpressionChecker` | This interface allows the user to provide a custom expression checker if the dis/allowed expression lists are not sufficient
    `static interface` | `SecureASTCustomizer.StatementChecker` | This interface allows the user to provide a custom statement checker if the dis/allowed statement lists are not sufficient

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `SecureASTCustomizer()` |

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `addExpressionCheckers​(SecureASTCustomizer.ExpressionChecker... checkers)` |
    `void` | `addStatementCheckers​(SecureASTCustomizer.StatementChecker... checkers)` |
    `void` | `call​(SourceUnit source, GeneratorContext context, ClassNode classNode)` |
    `List<String>` | `getAllowedConstantTypes()` |
    `List<Class<? extends Expression>>` | `getAllowedExpressions()` |
    `List<String>` | `getAllowedImports()` |
    `List<String>` | `getAllowedReceivers()` |
    `List<String>` | `getAllowedStarImports()` |
    `List<Class<? extends Statement>>` | `getAllowedStatements()` |
    `List<String>` | `getAllowedStaticImports()` |
    `List<String>` | `getAllowedStaticStarImports()` |
    `List<Integer>` | `getAllowedTokens()` |
    `List<String>` | `getConstantTypesBlackList()` | Legacy alias for `getDisallowedConstantTypes()`
    `List<String>` | `getConstantTypesWhiteList()` | Legacy alias for `getAllowedStatements()`
    `List<String>` | `getDisallowedConstantTypes()` |
    `List<Class<? extends Expression>>` | `getDisallowedExpressions()` |
    `List<String>` | `getDisallowedImports()` |
    `List<String>` | `getDisallowedReceivers()` |
    `List<String>` | `getDisallowedStarImports()` |
    `List<Class<? extends Statement>>` | `getDisallowedStatements()` |
    `List<String>` | `getDisallowedStaticImports()` |
    `List<String>` | `getDisallowedStaticStarImports()` |
    `List<Integer>` | `getDisallowedTokens()` |
    `List<Class<? extends Expression>>` | `getExpressionsBlacklist()` | Legacy alias for `getDisallowedExpressions()`
    `List<Class<? extends Expression>>` | `getExpressionsWhitelist()` | Legacy alias for `getAllowedExpressions()`
    `List<String>` | `getImportsBlacklist()` | Legacy alias for `getDisallowedImports()`
    `List<String>` | `getImportsWhitelist()` | Legacy alias for `getAllowedImports()`
    `List<String>` | `getReceiversBlackList()` | Legacy alias for `getDisallowedReceivers()`
    `List<String>` | `getReceiversWhiteList()` | Legacy alias for `getAllowedReceivers()`
    `List<String>` | `getStarImportsBlacklist()` | Legacy alias for `getDisallowedStarImports()`
    `List<String>` | `getStarImportsWhitelist()` | Legacy alias for `getAllowedStarImports()`
    `List<Class<? extends Statement>>` | `getStatementsBlacklist()` | Legacy alias for `getDisallowedStatements()`
    `List<Class<? extends Statement>>` | `getStatementsWhitelist()` | Legacy alias for `getAllowedStatements()`
    `List<String>` | `getStaticImportsBlacklist()` | Legacy alias for `getDisallowedStaticImports()`
    `List<String>` | `getStaticImportsWhitelist()` | Legacy alias for `getAllowedStaticImports()`
    `List<String>` | `getStaticStarImportsBlacklist()` | Legacy alias for `getDisallowedStaticStarImports()`
    `List<String>` | `getStaticStarImportsWhitelist()` | Legacy alias for `getAllowedStaticStarImports()`
    `List<Integer>` | `getTokensBlacklist()` | Legacy alias for `getDisallowedTokens()`
    `List<Integer>` | `getTokensWhitelist()` | Legacy alias for `getAllowedTokens()`
    `boolean` | `isClosuresAllowed()` |
    `boolean` | `isIndirectImportCheckEnabled()` |
    `boolean` | `isMethodDefinitionAllowed()` |
    `boolean` | `isPackageAllowed()` |
    `void` | `setAllowedConstantTypes​(List<String> allowedConstantTypes)` |
    `void` | `setAllowedConstantTypesClasses​(List<Class> allowedConstantTypes)` | An alternative way of setting constant types.
    `void` | `setAllowedExpressions​(List<Class<? extends Expression>> allowedExpressions)` |
    `void` | `setAllowedImports​(List<String> allowedImports)` |
    `void` | `setAllowedReceivers​(List<String> allowedReceivers)` | Sets the list of classes which may accept method calls.
    `void` | `setAllowedReceiversClasses​(List<Class> allowedReceivers)` | An alternative way of setting `receiver classes`.
    `void` | `setAllowedStarImports​(List<String> allowedStarImports)` |
    `void` | `setAllowedStatements​(List<Class<? extends Statement>> allowedStatements)` |
    `void` | `setAllowedStaticImports​(List<String> allowedStaticImports)` |
    `void` | `setAllowedStaticStarImports​(List<String> allowedStaticStarImports)` |
    `void` | `setAllowedTokens​(List<Integer> allowedTokens)` | Sets the list of tokens which are permitted.
    `void` | `setClosuresAllowed​(boolean closuresAllowed)` |
    `void` | `setConstantTypesBlackList​(List<String> constantTypesBlackList)` |
    `void` | `setConstantTypesClassesBlackList​(List<Class> disallowedConstantTypes)` | Legacy alias for `setDisallowedConstantTypesClasses(List)`
    `void` | `setConstantTypesClassesWhiteList​(List<Class> allowedConstantTypes)` | Legacy alias for `setAllowedConstantTypesClasses(List)`
    `void` | `setConstantTypesWhiteList​(List<String> allowedConstantTypes)` | Legacy alias for `setAllowedConstantTypes(List)`
    `void` | `setDisallowedConstantTypesClasses​(List<Class> disallowedConstantTypes)` | An alternative way of setting constant types.
    `void` | `setDisallowedExpressions​(List<Class<? extends Expression>> disallowedExpressions)` |
    `void` | `setDisallowedImports​(List<String> disallowedImports)` |
    `void` | `setDisallowedReceivers​(List<String> disallowedReceivers)` | Sets the list of classes which deny method calls.
    `void` | `setDisallowedReceiversClasses​(List<Class> disallowedReceivers)` | An alternative way of setting `receiver classes`.
    `void` | `setDisallowedStarImports​(List<String> disallowedStarImports)` |
    `void` | `setDisallowedStatements​(List<Class<? extends Statement>> disallowedStatements)` |
    `void` | `setDisallowedStaticImports​(List<String> disallowedStaticImports)` |
    `void` | `setDisallowedStaticStarImports​(List<String> disallowedStaticStarImports)` |
    `void` | `setDisallowedTokens​(List<Integer> disallowedTokens)` | Sets the list of tokens which are not permitted.
    `void` | `setExpressionsBlacklist​(List<Class<? extends Expression>> disallowedExpressions)` | Legacy alias for `setDisallowedExpressions(List)`
    `void` | `setExpressionsWhitelist​(List<Class<? extends Expression>> allowedExpressions)` | Legacy alias for `setAllowedExpressions(List)`
    `void` | `setImportsBlacklist​(List<String> disallowedImports)` | Legacy alias for `setDisallowedImports(List)`
    `void` | `setImportsWhitelist​(List<String> allowedImports)` | Legacy alias for `setAllowedImports(List)`
    `void` | `setIndirectImportCheckEnabled​(boolean indirectImportCheckEnabled)` | Set this option to true if you want your import rules to be checked against every class node.
    `void` | `setMethodDefinitionAllowed​(boolean methodDefinitionAllowed)` |
    `void` | `setPackageAllowed​(boolean packageAllowed)` |
    `void` | `setReceiversBlackList​(List<String> disallowedReceivers)` | Legacy alias for `setDisallowedReceivers(List)`
    `void` | `setReceiversClassesBlackList​(List<Class> disallowedReceivers)` | Legacy alias for `setDisallowedReceiversClasses(List)`.
    `void` | `setReceiversClassesWhiteList​(List<Class> allowedReceivers)` | Legacy alias for `setAllowedReceiversClasses(List)`
    `void` | `setReceiversWhiteList​(List<String> allowedReceivers)` | Legacy alias for `setAllowedReceivers(List)`
    `void` | `setStarImportsBlacklist​(List<String> disallowedStarImports)` | Legacy alias for `setDisallowedStarImports(List)`
    `void` | `setStarImportsWhitelist​(List<String> allowedStarImports)` | Legacy alias for `setAllowedStarImports(List)`
    `void` | `setStatementsBlacklist​(List<Class<? extends Statement>> disallowedStatements)` | Legacy alias for `setDisallowedStatements(List)`
    `void` | `setStatementsWhitelist​(List<Class<? extends Statement>> allowedStatements)` | Legacy alias for `setAllowedStatements(List)`
    `void` | `setStaticImportsBlacklist​(List<String> disallowedStaticImports)` | Legacy alias for `setDisallowedStaticImports(List)`
    `void` | `setStaticImportsWhitelist​(List<String> allowedStaticImports)` | Legacy alias for `setAllowedStaticImports(List)`
    `void` | `setStaticStarImportsBlacklist​(List<String> disallowedStaticStarImports)` | Legacy alias for `setDisallowedStaticStarImports(List)`
    `void` | `setStaticStarImportsWhitelist​(List<String> allowedStaticStarImports)` | Legacy alias for `setAllowedStaticStarImports(List)`
    `void` | `setTokensBlacklist​(List<Integer> disallowedTokens)` | Alias for `setDisallowedTokens(List)`.
    `void` | `setTokensWhitelist​(List<Integer> allowedTokens)` | Legacy alias for `setAllowedTokens(List)`

    - ### Methods inherited from class org.codehaus.groovy.control.customizers.CompilationCustomizer

      `getPhase`

    - ### Methods inherited from class org.codehaus.groovy.control.CompilationUnit.PrimaryClassNodeOperation

      `needSortedInput`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### SecureASTCustomizer

          public SecureASTCustomizer()

  - ### Method Detail

    - #### isMethodDefinitionAllowed

          public boolean isMethodDefinitionAllowed()

    - #### setMethodDefinitionAllowed

          public void setMethodDefinitionAllowed​(boolean methodDefinitionAllowed)

    - #### isPackageAllowed

          public boolean isPackageAllowed()

    - #### isClosuresAllowed

          public boolean isClosuresAllowed()

    - #### setClosuresAllowed

          public void setClosuresAllowed​(boolean closuresAllowed)

    - #### setPackageAllowed

          public void setPackageAllowed​(boolean packageAllowed)

    - #### getDisallowedImports

          public List<String> getDisallowedImports()

    - #### getImportsBlacklist

          public List<String> getImportsBlacklist()

      Legacy alias for `getDisallowedImports()`

    - #### setDisallowedImports

          public void setDisallowedImports​(List<String> disallowedImports)

    - #### setImportsBlacklist

          public void setImportsBlacklist​(List<String> disallowedImports)

      Legacy alias for `setDisallowedImports(List)`

    - #### getAllowedImports

          public List<String> getAllowedImports()

    - #### getImportsWhitelist

          public List<String> getImportsWhitelist()

      Legacy alias for `getAllowedImports()`

    - #### setAllowedImports

          public void setAllowedImports​(List<String> allowedImports)

    - #### setImportsWhitelist

          public void setImportsWhitelist​(List<String> allowedImports)

      Legacy alias for `setAllowedImports(List)`

    - #### getDisallowedStarImports

          public List<String> getDisallowedStarImports()

    - #### getStarImportsBlacklist

          public List<String> getStarImportsBlacklist()

      Legacy alias for `getDisallowedStarImports()`

    - #### setDisallowedStarImports

          public void setDisallowedStarImports​(List<String> disallowedStarImports)

    - #### setStarImportsBlacklist

          public void setStarImportsBlacklist​(List<String> disallowedStarImports)

      Legacy alias for `setDisallowedStarImports(List)`

    - #### getAllowedStarImports

          public List<String> getAllowedStarImports()

    - #### getStarImportsWhitelist

          public List<String> getStarImportsWhitelist()

      Legacy alias for `getAllowedStarImports()`

    - #### setAllowedStarImports

          public void setAllowedStarImports​(List<String> allowedStarImports)

    - #### setStarImportsWhitelist

          public void setStarImportsWhitelist​(List<String> allowedStarImports)

      Legacy alias for `setAllowedStarImports(List)`

    - #### getDisallowedStaticImports

          public List<String> getDisallowedStaticImports()

    - #### getStaticImportsBlacklist

          public List<String> getStaticImportsBlacklist()

      Legacy alias for `getDisallowedStaticImports()`

    - #### setDisallowedStaticImports

          public void setDisallowedStaticImports​(List<String> disallowedStaticImports)

    - #### setStaticImportsBlacklist

          public void setStaticImportsBlacklist​(List<String> disallowedStaticImports)

      Legacy alias for `setDisallowedStaticImports(List)`

    - #### getAllowedStaticImports

          public List<String> getAllowedStaticImports()

    - #### getStaticImportsWhitelist

          public List<String> getStaticImportsWhitelist()

      Legacy alias for `getAllowedStaticImports()`

    - #### setAllowedStaticImports

          public void setAllowedStaticImports​(List<String> allowedStaticImports)

    - #### setStaticImportsWhitelist

          public void setStaticImportsWhitelist​(List<String> allowedStaticImports)

      Legacy alias for `setAllowedStaticImports(List)`

    - #### getDisallowedStaticStarImports

          public List<String> getDisallowedStaticStarImports()

    - #### getStaticStarImportsBlacklist

          public List<String> getStaticStarImportsBlacklist()

      Legacy alias for `getDisallowedStaticStarImports()`

    - #### setDisallowedStaticStarImports

          public void setDisallowedStaticStarImports​(List<String> disallowedStaticStarImports)

    - #### setStaticStarImportsBlacklist

          public void setStaticStarImportsBlacklist​(List<String> disallowedStaticStarImports)

      Legacy alias for `setDisallowedStaticStarImports(List)`

    - #### getAllowedStaticStarImports

          public List<String> getAllowedStaticStarImports()

    - #### getStaticStarImportsWhitelist

          public List<String> getStaticStarImportsWhitelist()

      Legacy alias for `getAllowedStaticStarImports()`

    - #### setAllowedStaticStarImports

          public void setAllowedStaticStarImports​(List<String> allowedStaticStarImports)

    - #### setStaticStarImportsWhitelist

          public void setStaticStarImportsWhitelist​(List<String> allowedStaticStarImports)

      Legacy alias for `setAllowedStaticStarImports(List)`

    - #### getDisallowedExpressions

          public List<Class<? extends Expression>> getDisallowedExpressions()

    - #### getExpressionsBlacklist

          public List<Class<? extends Expression>> getExpressionsBlacklist()

      Legacy alias for `getDisallowedExpressions()`

    - #### setDisallowedExpressions

          public void setDisallowedExpressions​(List<Class<? extends Expression>> disallowedExpressions)

    - #### setExpressionsBlacklist

          public void setExpressionsBlacklist​(List<Class<? extends Expression>> disallowedExpressions)

      Legacy alias for `setDisallowedExpressions(List)`

    - #### getAllowedExpressions

          public List<Class<? extends Expression>> getAllowedExpressions()

    - #### getExpressionsWhitelist

          public List<Class<? extends Expression>> getExpressionsWhitelist()

      Legacy alias for `getAllowedExpressions()`

    - #### setAllowedExpressions

          public void setAllowedExpressions​(List<Class<? extends Expression>> allowedExpressions)

    - #### setExpressionsWhitelist

          public void setExpressionsWhitelist​(List<Class<? extends Expression>> allowedExpressions)

      Legacy alias for `setAllowedExpressions(List)`

    - #### getDisallowedStatements

          public List<Class<? extends Statement>> getDisallowedStatements()

    - #### getStatementsBlacklist

          public List<Class<? extends Statement>> getStatementsBlacklist()

      Legacy alias for `getDisallowedStatements()`

    - #### setDisallowedStatements

          public void setDisallowedStatements​(List<Class<? extends Statement>> disallowedStatements)

    - #### setStatementsBlacklist

          public void setStatementsBlacklist​(List<Class<? extends Statement>> disallowedStatements)

      Legacy alias for `setDisallowedStatements(List)`

    - #### getAllowedStatements

          public List<Class<? extends Statement>> getAllowedStatements()

    - #### getStatementsWhitelist

          public List<Class<? extends Statement>> getStatementsWhitelist()

      Legacy alias for `getAllowedStatements()`

    - #### setAllowedStatements

          public void setAllowedStatements​(List<Class<? extends Statement>> allowedStatements)

    - #### setStatementsWhitelist

          public void setStatementsWhitelist​(List<Class<? extends Statement>> allowedStatements)

      Legacy alias for `setAllowedStatements(List)`

    - #### isIndirectImportCheckEnabled

          public boolean isIndirectImportCheckEnabled()

    - #### setIndirectImportCheckEnabled

          public void setIndirectImportCheckEnabled​(boolean indirectImportCheckEnabled)

      Set this option to true if you want your import rules to be checked against every class node. This means that if someone uses a fully qualified class name, then it will also be checked against the import rules, preventing, for example, instantiation of classes without imports thanks to FQCN.
      Parameters:
        `indirectImportCheckEnabled` - set to true to enable indirect checks

    - #### getDisallowedTokens

          public List<Integer> getDisallowedTokens()

    - #### getTokensBlacklist

          public List<Integer> getTokensBlacklist()

      Legacy alias for `getDisallowedTokens()`

    - #### setDisallowedTokens

          public void setDisallowedTokens​(List<Integer> disallowedTokens)

      Sets the list of tokens which are not permitted.
      Parameters:
        `disallowedTokens` - the tokens. The values of the tokens must be those of `Types`

    - #### setTokensBlacklist

          public void setTokensBlacklist​(List<Integer> disallowedTokens)

      Alias for `setDisallowedTokens(List)`.

    - #### getAllowedTokens

          public List<Integer> getAllowedTokens()

    - #### getTokensWhitelist

          public List<Integer> getTokensWhitelist()

      Legacy alias for `getAllowedTokens()`

    - #### setAllowedTokens

          public void setAllowedTokens​(List<Integer> allowedTokens)

      Sets the list of tokens which are permitted.
      Parameters:
        `allowedTokens` - the tokens. The values of the tokens must be those of `Types`

    - #### setTokensWhitelist

          public void setTokensWhitelist​(List<Integer> allowedTokens)

      Legacy alias for `setAllowedTokens(List)`

    - #### addStatementCheckers

          public void addStatementCheckers​(SecureASTCustomizer.StatementChecker... checkers)

    - #### addExpressionCheckers

          public void addExpressionCheckers​(SecureASTCustomizer.ExpressionChecker... checkers)

    - #### getDisallowedConstantTypes

          public List<String> getDisallowedConstantTypes()

    - #### getConstantTypesBlackList

          public List<String> getConstantTypesBlackList()

      Legacy alias for `getDisallowedConstantTypes()`

    - #### setConstantTypesBlackList

          public void setConstantTypesBlackList​(List<String> constantTypesBlackList)

    - #### getAllowedConstantTypes

          public List<String> getAllowedConstantTypes()

    - #### getConstantTypesWhiteList

          public List<String> getConstantTypesWhiteList()

      Legacy alias for `getAllowedStatements()`

    - #### setAllowedConstantTypes

          public void setAllowedConstantTypes​(List<String> allowedConstantTypes)

    - #### setConstantTypesWhiteList

          public void setConstantTypesWhiteList​(List<String> allowedConstantTypes)

      Legacy alias for `setAllowedConstantTypes(List)`

    - #### setAllowedConstantTypesClasses

          public void setAllowedConstantTypesClasses​(List<Class> allowedConstantTypes)

      An alternative way of setting constant types.
      Parameters:
        `allowedConstantTypes` - a list of classes.

    - #### setConstantTypesClassesWhiteList

          public void setConstantTypesClassesWhiteList​(List<Class> allowedConstantTypes)

      Legacy alias for `setAllowedConstantTypesClasses(List)`

    - #### setDisallowedConstantTypesClasses

          public void setDisallowedConstantTypesClasses​(List<Class> disallowedConstantTypes)

      An alternative way of setting constant types.
      Parameters:
        `disallowedConstantTypes` - a list of classes.

    - #### setConstantTypesClassesBlackList

          public void setConstantTypesClassesBlackList​(List<Class> disallowedConstantTypes)

      Legacy alias for `setDisallowedConstantTypesClasses(List)`

    - #### getDisallowedReceivers

          public List<String> getDisallowedReceivers()

    - #### getReceiversBlackList

          public List<String> getReceiversBlackList()

      Legacy alias for `getDisallowedReceivers()`

    - #### setDisallowedReceivers

          public void setDisallowedReceivers​(List<String> disallowedReceivers)

      Sets the list of classes which deny method calls. Please note that since Groovy is a dynamic language, and this class performs a static type check, it will be relatively simple to bypass any disallowed list unless the disallowed receivers list contains, at a minimum, Object, Script, GroovyShell, and Eval. Additionally, it is necessary to also have MethodPointerExpression in the disallowed expressions list for the disallowed receivers list to function as a security check.
      Parameters:
        `disallowedReceivers` - the list of refused classes, as fully qualified names

    - #### setReceiversBlackList

          public void setReceiversBlackList​(List<String> disallowedReceivers)

      Legacy alias for `setDisallowedReceivers(List)`

    - #### setDisallowedReceiversClasses

          public void setDisallowedReceiversClasses​(List<Class> disallowedReceivers)

      An alternative way of setting `receiver classes`.
      Parameters:
        `disallowedReceivers` - a list of classes.

    - #### setReceiversClassesBlackList

          public void setReceiversClassesBlackList​(List<Class> disallowedReceivers)

      Legacy alias for `setDisallowedReceiversClasses(List)`.

    - #### getAllowedReceivers

          public List<String> getAllowedReceivers()

    - #### getReceiversWhiteList

          public List<String> getReceiversWhiteList()

      Legacy alias for `getAllowedReceivers()`

    - #### setAllowedReceivers

          public void setAllowedReceivers​(List<String> allowedReceivers)

      Sets the list of classes which may accept method calls.
      Parameters:
        `allowedReceivers` - the list of accepted classes, as fully qualified names

    - #### setReceiversWhiteList

          public void setReceiversWhiteList​(List<String> allowedReceivers)

      Legacy alias for `setAllowedReceivers(List)`

    - #### setAllowedReceiversClasses

          public void setAllowedReceiversClasses​(List<Class> allowedReceivers)

      An alternative way of setting `receiver classes`.
      Parameters:
        `allowedReceivers` - a list of classes.

    - #### setReceiversClassesWhiteList

          public void setReceiversClassesWhiteList​(List<Class> allowedReceivers)

      Legacy alias for `setAllowedReceiversClasses(List)`

    - #### call

          public void call​(SourceUnit source,
                           GeneratorContext context,
                           ClassNode classNode)
                    throws CompilationFailedException

      Specified by:
        `call` in class `CompilationUnit.PrimaryClassNodeOperation`
      Throws:
        `CompilationFailedException`