Package org.codehaus.groovy.control.io

## Class AbstractReaderSource

- java.lang.Object
- - org.codehaus.groovy.control.io.AbstractReaderSource

- All Implemented Interfaces:
    `HasCleanup`, `ReaderSource`
  Direct Known Subclasses:
    `FileReaderSource`, `InputStreamReaderSource`, `StringReaderSource`, `URLReaderSource`

      public abstract class AbstractReaderSource
      extends Object
      implements ReaderSource

  For ReaderSources that can choose a parent class, a base that provides common functionality.

- - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `protected CompilerConfiguration` | `configuration` |

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `AbstractReaderSource​(CompilerConfiguration configuration)` |

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `boolean` | `canReopenSource()` | Returns true if the source can be restarted (ie.
    `void` | `cleanup()` | Cleans up any cached resources used by getLine().
    `String` | `getLine​(int lineNumber, Janitor janitor)` | Returns a line from the source, or null, if unavailable.

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

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

    - ### Methods inherited from interface org.codehaus.groovy.control.io.ReaderSource

      `getReader, getURI`

- - ### Field Detail

    - #### configuration

          protected CompilerConfiguration configuration

  - ### Constructor Detail

    - #### AbstractReaderSource

          public AbstractReaderSource​(CompilerConfiguration configuration)

  - ### Method Detail

    - #### canReopenSource

          public boolean canReopenSource()

      Returns true if the source can be restarted (ie. if getReader() will return non-null on subsequent calls.
      Specified by:
        `canReopenSource` in interface `ReaderSource`
      Returns:
        true if the resource can be reopened for reading

    - #### getLine

          public String getLine​(int lineNumber,
                                Janitor janitor)

      Returns a line from the source, or null, if unavailable. If you supply a Janitor, resources will be cached.
      Specified by:
        `getLine` in interface `ReaderSource`
      Parameters:
        `lineNumber` - the number of the line of interest
        `janitor` - helper to clean up afterwards
      Returns:
        the line of interest

    - #### cleanup

          public void cleanup()

      Cleans up any cached resources used by getLine().
      Specified by:
        `cleanup` in interface `HasCleanup`
      Specified by:
        `cleanup` in interface `ReaderSource`