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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<!-- Generated by javadoc (build 1.4.2_07) on Thu Oct 12 12:19:55 EDT 2006 -->
<TITLE>
PushBackInputStream (PDFBox-0.7.3 API)
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  SUMMARY:&nbsp;NESTED&nbsp;|&nbsp;<A HREF="#fields_inherited_from_class_java.io.PushbackInputStream">FIELD</A>&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
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org.pdfbox.io</FONT>
<BR>
Class PushBackInputStream</H2>
<PRE>
<A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A>
  <IMG SRC="../../../resources/inherit.gif" ALT="extended by"><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/InputStream.html" title="class or interface in java.io">java.io.InputStream</A>
      <IMG SRC="../../../resources/inherit.gif" ALT="extended by"><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/FilterInputStream.html" title="class or interface in java.io">java.io.FilterInputStream</A>
          <IMG SRC="../../../resources/inherit.gif" ALT="extended by"><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html" title="class or interface in java.io">java.io.PushbackInputStream</A>
              <IMG SRC="../../../resources/inherit.gif" ALT="extended by"><B>org.pdfbox.io.PushBackInputStream</B>
</PRE>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../org/pdfbox/io/ByteArrayPushBackInputStream.html" title="class in org.pdfbox.io">ByteArrayPushBackInputStream</A></DD>
</DL>
<HR>
<DL>
<DT>public class <B>PushBackInputStream</B><DT>extends <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html" title="class or interface in java.io">PushbackInputStream</A></DL>

<P>
A simple subclass that adds a few convience methods.
<P>

<P>
<DL>
<DT><B>Version:</B></DT>
  <DD>$Revision: 1.6 $</DD>
<DT><B>Author:</B></DT>
  <DD><a href="mailto:ben@benlitchfield.com">Ben Litchfield</a></DD>
</DL>
<HR>

<P>
<!-- ======== NESTED CLASS SUMMARY ======== -->


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&nbsp;<A NAME="fields_inherited_from_class_java.io.PushbackInputStream"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TD><B>Fields inherited from class java.io.<A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html" title="class or interface in java.io">PushbackInputStream</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#buf" title="class or interface in java.io">buf</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#pos" title="class or interface in java.io">pos</A></CODE></TD>
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&nbsp;<A NAME="fields_inherited_from_class_java.io.FilterInputStream"><!-- --></A>
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<TD><B>Fields inherited from class java.io.<A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/FilterInputStream.html" title="class or interface in java.io">FilterInputStream</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/FilterInputStream.html#in" title="class or interface in java.io">in</A></CODE></TD>
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<TD><CODE><B><A HREF="../../../org/pdfbox/io/PushBackInputStream.html#PushBackInputStream(java.io.InputStream, int)">PushBackInputStream</A></B>(<A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/InputStream.html" title="class or interface in java.io">InputStream</A>&nbsp;input,
                    int&nbsp;size)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructor.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/pdfbox/io/PushBackInputStream.html#fillBuffer()">fillBuffer</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This is a method used to fix PDFBox issue 974661, the PDF parsing code needs
 to know if there is at least x amount of data left in the stream, but the available()
 method returns how much data will be available without blocking.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/pdfbox/io/PushBackInputStream.html#isEOF()">isEOF</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A simple test to see if we are at the end of the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/pdfbox/io/PushBackInputStream.html#peek()">peek</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This will peek at the next byte.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.io.PushbackInputStream"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class java.io.<A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html" title="class or interface in java.io">PushbackInputStream</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#available()" title="class or interface in java.io">available</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#close()" title="class or interface in java.io">close</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#markSupported()" title="class or interface in java.io">markSupported</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#read()" title="class or interface in java.io">read</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#read(byte[], int, int)" title="class or interface in java.io">read</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#skip(long)" title="class or interface in java.io">skip</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#unread(byte[])" title="class or interface in java.io">unread</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#unread(byte[], int, int)" title="class or interface in java.io">unread</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/PushbackInputStream.html#unread(int)" title="class or interface in java.io">unread</A></CODE></TD>
</TR>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TD><B>Methods inherited from class java.io.<A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/FilterInputStream.html" title="class or interface in java.io">FilterInputStream</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/FilterInputStream.html#mark(int)" title="class or interface in java.io">mark</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/FilterInputStream.html#read(byte[])" title="class or interface in java.io">read</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/FilterInputStream.html#reset()" title="class or interface in java.io">reset</A></CODE></TD>
</TR>
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&nbsp;
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<A NAME="PushBackInputStream(java.io.InputStream, int)"><!-- --></A><H3>
PushBackInputStream</H3>
<PRE>
public <B>PushBackInputStream</B>(<A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/InputStream.html" title="class or interface in java.io">InputStream</A>&nbsp;input,
                           int&nbsp;size)
                    throws <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Constructor.
<P>
<DT><B>Parameters:</B><DD><CODE>input</CODE> - The input stream.<DD><CODE>size</CODE> - The size of the push back buffer.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - If there is an error with the stream.</DL>

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</TABLE>

<A NAME="peek()"><!-- --></A><H3>
peek</H3>
<PRE>
public int <B>peek</B>()
         throws <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>This will peek at the next byte.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The next byte on the stream, leaving it as available to read.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - If there is an error reading the next byte.</DL>
</DD>
</DL>
<HR>

<A NAME="isEOF()"><!-- --></A><H3>
isEOF</H3>
<PRE>
public boolean <B>isEOF</B>()
              throws <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>A simple test to see if we are at the end of the stream.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>true if we are at the end of the stream.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - If there is an error reading the next byte.</DL>
</DD>
</DL>
<HR>

<A NAME="fillBuffer()"><!-- --></A><H3>
fillBuffer</H3>
<PRE>
public void <B>fillBuffer</B>()
                throws <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>This is a method used to fix PDFBox issue 974661, the PDF parsing code needs
 to know if there is at least x amount of data left in the stream, but the available()
 method returns how much data will be available without blocking.  PDFBox is willing to
 block to read the data, so we will first fill the internal buffer.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - If there is an error filling the buffer.</DL>
</DD>
</DL>
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