Package org.apache.tools.ant.filters

Class ConcatFilter

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.ConcatFilter

All Implemented Interfaces:

Closeable, AutoCloseable, Readable, ChainableReader, Parameterizable

public final class ConcatFilter
extends BaseParamFilterReader
implements ChainableReader

Concats a file before and/or after the file.

Example:

 <copy todir="build">
     <fileset dir="src" includes="*.java"/>
     <filterchain>
         <concatfilter prepend="apache-license-java.txt"/>
     </filterchain>
 </copy>
 

Copies all java sources from src to build and adds the content of apache-license-java.txt add the beginning of each file.

Since:

1.6

Version:

2003-09-23

Field Summary

Fields inherited from class java.io.FilterReader

in

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor	Description
ConcatFilter()	Constructor for "dummy" instances.
ConcatFilter(Reader in)	Creates a new filtered reader.

Method Summary

Modifier and Type	Method	Description
Reader	chain(Reader rdr)	Creates a new ConcatReader using the passed in Reader for instantiation.
File	getAppend()	Returns append attribute.
File	getPrepend()	Returns prepend attribute.
int	read()	Returns the next character in the filtered stream.
void	setAppend(File append)	Sets append attribute.
void	setPrepend(File prepend)	Sets prepend attribute.

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

ConcatFilter

public ConcatFilter()

Constructor for "dummy" instances.

See Also:

• BaseFilterReader()

ConcatFilter

public ConcatFilter(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. If the desired number of lines have already been read, the resulting stream is effectively at an end. Otherwise, the next character from the underlying stream is read and returned.

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

setPrepend

public void setPrepend(File prepend)

Sets prepend attribute.

Parameters:

prepend - new value

getPrepend

public File getPrepend()

Returns prepend attribute.

Returns:

prepend attribute

setAppend

public void setAppend(File append)

Sets append attribute.

Parameters:

append - new value

getAppend

public File getAppend()

Returns append attribute.

Returns:

append attribute

chain

public Reader chain(Reader rdr)

Creates a new ConcatReader 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