Package org.codehaus.groovy.ast.tools

## Class ClosureUtils

- java.lang.Object
- - org.codehaus.groovy.ast.tools.ClosureUtils

-     public class ClosureUtils
      extends Object

  Handy methods when working with Closure AST data structures.

- - ### Constructor Summary

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

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `static String` | `convertClosureToSource​(ReaderSource readerSource, ClosureExpression expression)` | Converts a ClosureExpression into the String source.
    `static Parameter[]` | `getParametersSafe​(ClosureExpression ce)` |
    `static boolean` | `hasImplicitParameter​(ClosureExpression ce)` |
    `static boolean` | `hasSingleCharacterArg​(Closure c)` | Does the Closure have a single char-like (char or Character) argument.
    `static boolean` | `hasSingleStringArg​(Closure c)` | Does the Closure have a single String argument.

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

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

- - ### Constructor Detail

    - #### ClosureUtils

          public ClosureUtils()

  - ### Method Detail

    - #### convertClosureToSource

          public static String convertClosureToSource​(ReaderSource readerSource,
                                                      ClosureExpression expression)
                                               throws Exception

      Converts a ClosureExpression into the String source.
      Parameters:
        `readerSource` - a source
        `expression` - a closure. Can't be null
      Returns:
        the source the closure was created from
      Throws:
        `IllegalArgumentException` - when expression is null
        `Exception` - when closure can't be read from source

    - #### hasSingleCharacterArg

          public static boolean hasSingleCharacterArg​(Closure c)

      Does the Closure have a single char-like (char or Character) argument.
      Parameters:
        `c` - a Closure
      Returns:
        true if it has exactly one argument and the type is char or Character

    - #### hasSingleStringArg

          public static boolean hasSingleStringArg​(Closure c)

      Does the Closure have a single String argument.
      Parameters:
        `c` - a Closure
      Returns:
        true if it has exactly one argument and the type is String

    - #### hasImplicitParameter

          public static boolean hasImplicitParameter​(ClosureExpression ce)

      Returns:
        true if the ClosureExpression has an implicit 'it' parameter

    - #### getParametersSafe

          public static Parameter[] getParametersSafe​(ClosureExpression ce)

      Returns:
        the parameters for the ClosureExpression