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 java.lang.Object
      implements ReaderSource

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

- - ### Field Summary

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

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AbstractReaderSource(CompilerConfiguration configuration)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `canReopenSource()` Returns true if the source can be restarted (ie. if getReader() will return non-null on subsequent calls.
    `void` | `cleanup()` Cleans up any cached resources used by getLine().
    `java.lang.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`

- - ### 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 java.lang.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`