Package org.apache.tools.ant.filters

Class ReplaceTokens

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.ReplaceTokens

All Implemented Interfaces:

Closeable, AutoCloseable, Readable, ChainableReader, Parameterizable

public final class ReplaceTokens
extends BaseParamFilterReader
implements ChainableReader

Replaces tokens in the original input with user-supplied values. Example:

<replacetokens begintoken="#" endtoken="#">
   <token key="DATE" value="${TODAY}"/>
 </replacetokens>

Or:

<filterreader classname="org.apache.tools.ant.filters.ReplaceTokens">
   <param type="tokenchar" name="begintoken" value="#"/>
   <param type="tokenchar" name="endtoken" value="#"/>
   <param type="token" name="DATE" value="${TODAY}"/>
 </filterreader>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ReplaceTokens.Token	Holds a token

Field Summary

Fields inherited from class java.io.FilterReader

in

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
void	addConfiguredToken(ReplaceTokens.Token token)	Adds a token element to the map of tokens to replace.
Reader	chain(Reader rdr)	Creates a new ReplaceTokens using the passed in Reader for instantiation.
int	read()	Returns the next character in the filtered stream, replacing tokens from the original stream.
void	setBeginToken(String beginToken)	Sets the "begin token" character.
void	setEndToken(String endToken)	Sets the "end token" character.
void	setPropertiesResource(Resource r)	A resource containing properties, each of which is interpreted as a token/value pair.

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

ReplaceTokens

public ReplaceTokens()

Constructor for "dummy" instances.

See Also:

• BaseFilterReader()

ReplaceTokens

public ReplaceTokens(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, replacing tokens from the original stream.

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

setBeginToken

public void setBeginToken(String beginToken)

Sets the "begin token" character.

Parameters:

beginToken - the character used to denote the beginning of a token

setEndToken

public void setEndToken(String endToken)

Sets the "end token" character.

Parameters:

endToken - the character used to denote the end of a token

setPropertiesResource

public void setPropertiesResource(Resource r)

A resource containing properties, each of which is interpreted as a token/value pair.

Parameters:

r - Resource

Since:

Ant 1.8.0

addConfiguredToken

public void addConfiguredToken(ReplaceTokens.Token token)

Adds a token element to the map of tokens to replace.

Parameters:

token - The token to add to the map of replacements. Must not be null.

chain

public Reader chain(Reader rdr)

Creates a new ReplaceTokens 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