gzippedinputstream.html

用JAVA编写的,在做实验的时候留下来的,本来想删的,但是传上来,大家分享吧

<A NAME="GzippedInputStream(java.io.InputStream, int)"><!-- --></A><H3>
GzippedInputStream</H3>
<PRE>
public <B>GzippedInputStream</B>(java.io.InputStream&nbsp;is,
                          int&nbsp;size)
                   throws java.io.IOException</PRE>
<DL>
<DL>
<DT><B>Parameters:</B><DD><CODE>is</CODE> - An InputStream that implements RespositionableStream and
 returns <code>true</code> when we call
 <CODE>InputStream.markSupported()</CODE> (Latter is needed so can setup
 an <CODE>Iterator</CODE> against the Gzip stream).<DD><CODE>size</CODE> - Size of blocks to use reading.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

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<B>Method Detail</B></FONT></TH>
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<A NAME="checkStream(java.io.InputStream)"><!-- --></A><H3>
checkStream</H3>
<PRE>
protected static java.io.InputStream <B>checkStream</B>(java.io.InputStream&nbsp;is)
                                          throws java.io.IOException</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="gotoEOR(int)"><!-- --></A><H3>
gotoEOR</H3>
<PRE>
public long <B>gotoEOR</B>(int&nbsp;ignore)
             throws java.io.IOException</PRE>
<DL>
<DD>Exhaust current GZIP member content.
 Call this method when you think you're on the end of the
 GZIP member.  It will clean out any dross.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>ignore</CODE> - Character to ignore counting characters (Usually
 trailing new lines).
<DT><B>Returns:</B><DD>Count of characters skipped over.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="gotoEOR()"><!-- --></A><H3>
gotoEOR</H3>
<PRE>
public long <B>gotoEOR</B>()
             throws java.io.IOException</PRE>
<DL>
<DD>Exhaust current GZIP member content.
 Call this method when you think you're on the end of the
 GZIP member.  It will clean out any dross.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Count of characters skipped over.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="iterator()"><!-- --></A><H3>
iterator</H3>
<PRE>
public java.util.Iterator <B>iterator</B>()</PRE>
<DL>
<DD>Returns a GZIP Member Iterator.
 Has limitations. Can only get one Iterator per instance of this class;
 you must get new instance if you want to get Iterator again.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Iterator over GZIP Members.</DL>
</DD>
</DL>
<HR>

<A NAME="moveToNextGzipMember()"><!-- --></A><H3>
moveToNextGzipMember</H3>
<PRE>
protected boolean <B>moveToNextGzipMember</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>True if we found another record in the stream.</DL>
</DD>
</DL>
<HR>

<A NAME="getInflater()"><!-- --></A><H3>
getInflater</H3>
<PRE>
protected java.util.zip.Inflater <B>getInflater</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getInputStream()"><!-- --></A><H3>
getInputStream</H3>
<PRE>
protected java.io.InputStream <B>getInputStream</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getGzipHeader()"><!-- --></A><H3>
getGzipHeader</H3>
<PRE>
protected <A HREF="../../../org/archive/io/GzipHeader.html" title="class in org.archive.io">GzipHeader</A> <B>getGzipHeader</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="resetInflater()"><!-- --></A><H3>
resetInflater</H3>
<PRE>
protected void <B>resetInflater</B>()</PRE>
<DL>
<DD>Move to next gzip member in the file.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readHeader()"><!-- --></A><H3>
readHeader</H3>
<PRE>
protected void <B>readHeader</B>()
                   throws java.io.IOException</PRE>
<DL>
<DD>Read in the gzip header.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="position(long)"><!-- --></A><H3>
position</H3>
<PRE>
public void <B>position</B>(long&nbsp;position)
              throws java.io.IOException</PRE>
<DL>
<DD>Seek to passed offset.
 
 After positioning the stream, it resets the inflater.
 Assumption is that public use of this method is only
 to position stream at start of a gzip member.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>position</CODE> in interface <CODE>it.unimi.dsi.fastutil.io.RepositionableStream</CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>position</CODE> - Absolute position of a gzip member start.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="position()"><!-- --></A><H3>
position</H3>
<PRE>
public long <B>position</B>()
              throws java.io.IOException</PRE>
<DL>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>position</CODE> in interface <CODE>it.unimi.dsi.fastutil.io.RepositionableStream</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="gzipMemberSeek(long)"><!-- --></A><H3>
gzipMemberSeek</H3>
<PRE>
public void <B>gzipMemberSeek</B>(long&nbsp;position)
                    throws java.io.IOException</PRE>
<DL>
<DD>Seek to a gzip member.
 
 Moves stream to new position, resets inflater and reads in the gzip
 header ready for subsequent calls to read.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>position</CODE> - Absolute position of a gzip member start.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="gzipMemberSeek()"><!-- --></A><H3>
gzipMemberSeek</H3>
<PRE>
public void <B>gzipMemberSeek</B>()
                    throws java.io.IOException</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="gzip(byte[])"><!-- --></A><H3>
gzip</H3>
<PRE>
public static byte[] <B>gzip</B>(byte[]&nbsp;bytes)
                   throws java.io.IOException</PRE>
<DL>
<DD>Gzip passed bytes.
 Use only when bytes is small.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bytes</CODE> - What to gzip.
<DT><B>Returns:</B><DD>A gzip member of bytes.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="isCompressedRepositionableStream(it.unimi.dsi.fastutil.io.RepositionableStream)"><!-- --></A><H3>
isCompressedRepositionableStream</H3>
<PRE>
public static boolean <B>isCompressedRepositionableStream</B>(it.unimi.dsi.fastutil.io.RepositionableStream&nbsp;rs)
                                                throws java.io.IOException</PRE>
<DL>
<DD>Tests passed stream is GZIP stream by reading in the HEAD.
 Does reposition of stream when done.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rs</CODE> - An InputStream that is Repositionable.
<DT><B>Returns:</B><DD>True if compressed stream.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="isCompressedStream(java.io.InputStream)"><!-- --></A><H3>
isCompressedStream</H3>
<PRE>
public static boolean <B>isCompressedStream</B>(java.io.InputStream&nbsp;is)
                                  throws java.io.IOException</PRE>
<DL>
<DD>Tests passed stream is gzip stream by reading in the HEAD.
 Does not reposition stream when done.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>is</CODE> - An InputStream.
<DT><B>Returns:</B><DD>True if compressed stream.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
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