org.apache.tools.ant.filters

Class ExpandProperties

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"/>
Constructor Summary
ExpandProperties()
Constructor for "dummy" instances.
ExpandProperties(Reader in)
Creates a new filtered reader.
Method Summary
Readerchain(Reader rdr)
Creates a new ExpandProperties filter using the passed in Reader for instantiation.
intread()
Returns the next character in the filtered stream.

Constructor Detail

ExpandProperties

public ExpandProperties()
Constructor for "dummy" instances.

See Also: BaseFilterReader

ExpandProperties

public ExpandProperties(Reader in)
Creates a new filtered reader.

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

Method Detail

chain

public final Reader chain(Reader rdr)
Creates a new ExpandProperties filter using the passed in Reader for instantiation.

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

read

public final int read()
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.

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

Copyright