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:
- java.io.Closeable, java.lang.Readable, 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"/>
Fields inherited from class java.io.FilterReader |
in |
Fields inherited from class java.io.Reader |
lock |
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 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 |
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
.
read
public 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 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