Package: org.apache.groovy.groovysh.util

## [Groovy] Class PackageHelperImpl

- org.apache.groovy.groovysh.util.PackageHelperImpl

- All Implemented Interfaces and Traits:
    PackageHelper, PreferenceChangeListener

      @AutoFinal
      @CompileStatic
      class PackageHelperImpl
      extends Object
      implements PackageHelper, PreferenceChangeListener

  Helper class that crawls all items of the classpath for packages. Retrieves from those sources the list of subpackages and classes on demand.

- - ### Field Summary

    Fields
    Modifiers | Name | Description
    --- | --- | ---
    `protected static Logger` | `LOG` |
    `static Pattern` | `NAME_PATTERN` | Pattern for regular class names.

  - ### Properties Summary

    Properties
    Type | Name and description
    --- | ---
    `ClassLoader` | `groovyClassLoader`
    `Map<String, CachedPackage>` | `rootPackages`

  - ### Constructor Summary

    Constructors
    Constructor and description
    `PackageHelperImpl (ClassLoader groovyClassLoader)`

  - ### Methods Summary

    Methods
    Type Params | Return Type | Name and description
    --- | --- | ---
    `` | `static Collection<String>` | `collectPackageNamesFromFolderRecursive(File directory, String prefix, Set<String> packnames)` Crawls a folder, iterates over subfolders, looking for class files.
    `` | `static Set<String>` | `getClassnames(Set<URL> urls, String packagename)` Copied from JLine 1.0 ClassNameCompletor.
    `` | `Set<String>` | `getContents(String packagename)` Returns the names of Classes and direct subpackages contained in a package.
    `` | `static Collection<String>` | `getPackageNames(URL url)` Returns all package names found at URL; accepts jar files and folders.
    `` | `static Collection<String>` | `getPackageNamesFromJar(JarFile jf)`
    `` | `static Object` | `mergeNewPackages(Collection<String> packageNames, URL url, Map<String, CachedPackage> rootPackages)`
    `` | `void` | `preferenceChange(PreferenceChangeEvent evt)`
    `` | `void` | `reset()`

  - ### Inherited Methods Summary

    Inherited Methods
    Methods inherited from class | Name
    --- | ---
    `class Object` | `wait, wait, wait, equals, toString, hashCode, getClass, notify, notifyAll`

- - ### Field Detail

    - #### protected static final Logger LOG

    - #### public static final Pattern NAME_PATTERN

      Pattern for regular class names.

  - ### Property Detail

    - #### final ClassLoader groovyClassLoader

    - #### Map<String, CachedPackage> rootPackages

  - ### Constructor Detail

    - #### PackageHelperImpl(ClassLoader groovyClassLoader)

  - ### Method Detail

    - #### static Collection<String> collectPackageNamesFromFolderRecursive(File directory, String prefix, Set<String> packnames)

      Crawls a folder, iterates over subfolders, looking for class files.

    - #### static Set<String> getClassnames(Set<URL> urls, String packagename)

      Copied from JLine 1.0 ClassNameCompletor.

    - #### @Override Set<String> getContents(String packagename)

      Returns the names of Classes and direct subpackages contained in a package.

    - #### static Collection<String> getPackageNames(URL url)

      Returns all package names found at URL; accepts jar files and folders.

    - #### static Collection<String> getPackageNamesFromJar(JarFile jf)

    - #### static Object mergeNewPackages(Collection<String> packageNames, URL url, Map<String, CachedPackage> rootPackages)

    - #### @Override void preferenceChange(PreferenceChangeEvent evt)

    - #### @Override void reset()