StripLineComments (Apache Ant API)

org.apache.tools.ant.filters

## Class StripLineComments

- java.lang.Object
- - java.io.Reader
  - - java.io.FilterReader
    - - org.apache.tools.ant.filters.BaseFilterReader
      - - org.apache.tools.ant.filters.BaseParamFilterReader
        - - org.apache.tools.ant.filters.StripLineComments

- All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable, java.lang.Readable, ChainableReader, Parameterizable

      public final class StripLineComments
      extends BaseParamFilterReader
      implements ChainableReader

  This filter strips line comments. Example:

      <striplinecomments>
         <comment value="#"/>
         <comment value="--"/>
         <comment value="REM "/>
         <comment value="rem "/>
         <comment value="//"/>
       </striplinecomments>

  Or:

      <filterreader
            classname="org.apache.tools.ant.filters.StripLineComments">
         <param type="comment" value="#"/>
         <param type="comment" value="--"/>
         <param type="comment" value="REM "/>
         <param type="comment" value="rem "/>
         <param type="comment" value="//"/>
       </filterreader>

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `StripLineComments.Comment` The class that holds a comment representation.

  - ### Field Summary

    - ### Fields inherited from class java.io.FilterReader

      `in`

    - ### Fields inherited from class java.io.Reader

      `lock`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `StripLineComments()` Constructor for "dummy" instances.
    `StripLineComments(java.io.Reader in)` Creates a new filtered reader.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addConfiguredComment(StripLineComments.Comment comment)` Adds a `comment` element to the list of prefixes.
    `java.io.Reader` | `chain(java.io.Reader rdr)` Creates a new StripLineComments using the passed in Reader for instantiation.
    `int` | `read()` Returns the next character in the filtered stream, only including lines from the original stream which don't start with any of the specified comment prefixes.

    - ### Methods inherited from class org.apache.tools.ant.filters.BaseParamFilterReader

      `getParameters, setParameters`

    - ### Methods inherited from class org.apache.tools.ant.filters.BaseFilterReader

      `getInitialized, getProject, read, readFully, readLine, setInitialized, setProject, skip`

    - ### Methods inherited from class java.io.FilterReader

      `close, mark, markSupported, ready, reset`

    - ### Methods inherited from class java.io.Reader

      `read, read`

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

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

- - ### Constructor Detail

    - #### StripLineComments

          public StripLineComments()

      Constructor for "dummy" instances.
      See Also:
        `BaseFilterReader.BaseFilterReader()`

    - #### StripLineComments

          public StripLineComments(java.io.Reader in)

      Creates a new filtered reader.
      Parameters:
        `in` - A Reader object providing the underlying stream. Must not be `null`.

  - ### Method Detail

    - #### read

          public int read()
                   throws java.io.IOException

      Returns the next character in the filtered stream, only including lines from the original stream which don't start with any of the specified comment prefixes.
      Overrides:
        `read` in class `java.io.FilterReader`
      Returns:
        the next character in the resulting stream, or -1 if the end of the resulting stream has been reached
      Throws:
        `java.io.IOException` - if the underlying stream throws an IOException during reading

    - #### addConfiguredComment

          public void addConfiguredComment(StripLineComments.Comment comment)

      Adds a `comment` element to the list of prefixes.
      Parameters:
        `comment` - The `comment` element to add to the list of comment prefixes to strip. Must not be `null`.

    - #### chain

          public java.io.Reader chain(java.io.Reader rdr)

      Creates a new StripLineComments using the passed in Reader for instantiation.
      Specified by:
        `chain` in interface `ChainableReader`
      Parameters:
        `rdr` - A Reader object providing the underlying stream. Must not be `null`.
      Returns:
        a new filter based on this configuration, but filtering the specified reader