org.apache.tools.ant.filters
Class ExpandProperties

java.lang.Object
  |
  +--java.io.Reader
        |
        +--java.io.FilterReader
              |
              +--org.apache.tools.ant.filters.BaseFilterReader
                    |
                    +--org.apache.tools.ant.filters.ExpandProperties

All Implemented Interfaces:

ChainableReader

public final class ExpandProperties

extends BaseFilterReader

implements ChainableReader

Expands Ant properties, if any, in the data.

Example:

<expandproperties/>

Or:

<filterreader
    classname="org.apache.tools.ant.filters.ExpandProperties"/>

Field Summary

Fields inherited from class java.io.FilterReader

in

Fields inherited from class java.io.Reader

lock

Constructor Summary

ExpandProperties()
Constructor for "dummy" instances.

ExpandProperties(java.io.Reader in)
Creates a new filtered reader.

Method Summary

java.io.Reader	chain(java.io.Reader rdr) Creates a new ExpandProperties filter using the passed in Reader for instantiation.
int	read() Returns the next character in the filtered stream.

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpandProperties

public ExpandProperties()

Constructor for "dummy" instances.

See Also:

BaseFilterReader.BaseFilterReader()

ExpandProperties

public ExpandProperties(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 final int read()
               throws java.io.IOException

Returns the next character in the filtered stream. The original stream is first read in fully, and the Ant properties are expanded. The results of this expansion are then queued so they can be read character-by-character.

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

chain

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

Creates a new ExpandProperties filter 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