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:

java.io.Closeable, java.lang.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

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

ReplaceTokens()
Constructor for "dummy" instances.

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

Method Summary

void	addConfiguredToken(ReplaceTokens.Token token) Adds a token element to the map of tokens to replace.
java.io.Reader	chain(java.io.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(char beginToken) Sets the "begin token" character.
void	setEndToken(char endToken) Sets the "end token" character.

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

read, read

Methods inherited from class java.lang.Object

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

Constructor Detail

ReplaceTokens

public ReplaceTokens()

Constructor for "dummy" instances.

See Also:

BaseFilterReader.BaseFilterReader()

ReplaceTokens

public ReplaceTokens(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 int read()
         throws java.io.IOException

Returns the next character in the filtered stream, replacing tokens from the original stream.

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

setBeginToken

public void setBeginToken(char beginToken)

Sets the "begin token" character.

Parameters:

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

setEndToken

public void setEndToken(char endToken)

Sets the "end token" character.

Parameters:

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

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 java.io.Reader chain(java.io.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