java.io.Closeable, java.lang.AutoCloseable, java.lang.Readable, ChainableReader, Parameterizablepublic final class HeadFilter extends BaseParamFilterReader implements ChainableReader
n lines of a stream.
(Default is first 10 lines.)
Example:
<headfilter lines="3"/>Or:
<filterreader classname="org.apache.tools.ant.filters.HeadFilter">
<param name="lines" value="3"/>
</filterreader>| Constructor | Description |
|---|---|
HeadFilter() |
Constructor for "dummy" instances.
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HeadFilter(java.io.Reader in) |
Creates a new filtered reader.
|
| Modifier and Type | Method | Description |
|---|---|---|
java.io.Reader |
chain(java.io.Reader rdr) |
Creates a new HeadFilter using the passed in
Reader for instantiation.
|
int |
read() |
Returns the next character in the filtered stream.
|
void |
setLines(long lines) |
Sets the number of lines to be returned in the filtered stream.
|
void |
setSkip(long skip) |
Sets the number of lines to be skipped in the filtered stream.
|
getInitialized, getProject, read, readFully, readLine, setInitialized, setProject, skipgetParameters, setParameterspublic HeadFilter()
BaseFilterReader()public HeadFilter(java.io.Reader in)
in - A Reader object providing the underlying stream.
Must not be null.public int read()
throws java.io.IOException
read in class java.io.FilterReaderjava.io.IOException - if the underlying stream throws an IOException
during readingpublic void setLines(long lines)
lines - the number of lines to be returned in the filtered streampublic void setSkip(long skip)
skip - the number of lines to be skipped in the filtered streampublic java.io.Reader chain(java.io.Reader rdr)
chain in interface ChainableReaderrdr - A Reader object providing the underlying stream.
Must not be null.