Package 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:

Closeable, AutoCloseable, 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	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	Description
StripLineComments()	Constructor for "dummy" instances.
StripLineComments(Reader in)	Creates a new filtered reader.

Method Summary

Modifier and Type	Method	Description
void	addConfiguredComment(StripLineComments.Comment comment)	Adds a comment element to the list of prefixes.
Reader	chain(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

nullReader, read, read, transferTo

Methods inherited from class java.lang.Object

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

Constructor Details

StripLineComments

public StripLineComments()

Constructor for "dummy" instances.

See Also:

• BaseFilterReader()

StripLineComments

public StripLineComments(Reader in)

Creates a new filtered reader.

Parameters:

in - A Reader object providing the underlying stream. Must not be null.

Method Details

read

public int read()
         throws 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 FilterReader

Returns:

the next character in the resulting stream, or -1 if the end of the resulting stream has been reached

Throws:

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 Reader chain(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