Package org.apache.tools.ant.filters
Class TailFilter
- java.lang.Object
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- java.io.Reader
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- java.io.FilterReader
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- org.apache.tools.ant.filters.BaseFilterReader
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- org.apache.tools.ant.filters.BaseParamFilterReader
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- org.apache.tools.ant.filters.TailFilter
 
 
 
 
 
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- All Implemented Interfaces:
- java.io.Closeable,- java.lang.AutoCloseable,- java.lang.Readable,- ChainableReader,- Parameterizable
 
 public final class TailFilter extends BaseParamFilterReader implements ChainableReader Reads the lastnlines of a stream. (Default is last10 lines.) Example:<tailfilter lines="3"/> Or:<filterreader classname="org.apache.tools.ant.filters.TailFilter"> <param name="lines" value="3"/> </filterreader> 
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Constructor SummaryConstructors Constructor Description TailFilter()Constructor for "dummy" instances.TailFilter(java.io.Reader in)Creates a new filtered reader.
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Method SummaryModifier and Type Method Description java.io.Readerchain(java.io.Reader rdr)Creates a new TailFilter using the passed in Reader for instantiation.intread()Returns the next character in the filtered stream.voidsetLines(long lines)Sets the number of lines to be returned in the filtered stream.voidsetSkip(long skip)Sets the number of lines to be skipped in the filtered stream.- 
Methods inherited from class org.apache.tools.ant.filters.BaseParamFilterReadergetParameters, setParameters
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Methods inherited from class org.apache.tools.ant.filters.BaseFilterReadergetInitialized, getProject, read, readFully, readLine, setInitialized, setProject, skip
 
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Constructor Detail- 
TailFilterpublic TailFilter() Constructor for "dummy" instances.- See Also:
- BaseFilterReader()
 
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TailFilterpublic TailFilter(java.io.Reader in) Creates a new filtered reader.- Parameters:
- in- A Reader object providing the underlying stream. Must not be- null.
 
 
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Method Detail- 
readpublic int read() throws java.io.IOExceptionReturns the next character in the filtered stream. If the read-ahead has been completed, the next character in the buffer is returned. Otherwise, the stream is read to the end and buffered (with the buffer growing as necessary), then the appropriate position in the buffer is set to read from.- Overrides:
- readin 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
 
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setLinespublic void setLines(long lines) Sets the number of lines to be returned in the filtered stream.- Parameters:
- lines- the number of lines to be returned in the filtered stream
 
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setSkippublic void setSkip(long skip) Sets the number of lines to be skipped in the filtered stream.- Parameters:
- skip- the number of lines to be skipped in the filtered stream
 
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chainpublic java.io.Reader chain(java.io.Reader rdr) Creates a new TailFilter using the passed in Reader for instantiation.- Specified by:
- chainin 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
 
 
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