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DbaseFileReaderNIO (FMap API) |
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<A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileNIO.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp"><B>PREV CLASS</B></A> |
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SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> |
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com.iver.cit.gvsig.fmap.drivers.shp</FONT>
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<BR>
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Class DbaseFileReaderNIO</H2>
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<PRE>
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java.lang.Object |
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<IMG SRC="../../../../../../../resources/inherit.gif" ALT="extended by"><B>com.iver.cit.gvsig.fmap.drivers.shp.DbaseFileReaderNIO</B> |
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</PRE>
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<HR>
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<DL>
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<DT>public class <B>DbaseFileReaderNIO</B><DT>extends java.lang.Object</DL> |
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<P>
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A DbaseFileReader is used to read a dbase III format file. |
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<br>
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The general use of this class is: |
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<CODE><PRE> |
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FileChannel in = new FileInputStream("thefile.dbf").getChannel();
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DbaseFileReader r = new DbaseFileReader( in ) |
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Object[] fields = new Object[r.getHeader().getNumFields()]; |
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while (r.hasNext()) {
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r.readEntry(fields); |
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// do stuff |
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} |
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r.close(); |
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</PRE></CODE> |
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For consumers who wish to be a bit more selective with their reading of rows, |
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the Row object has been added. The semantics are the same as using the |
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readEntry method, but remember that the Row object is always the same. The |
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values are parsed as they are read, so it pays to copy them out (as each call |
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to Row.read() will result in an expensive String parse). |
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<br><b>EACH CALL TO readEntry OR readRow ADVANCES THE FILE!</b><br> |
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An example of using the Row method of reading: |
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<CODE><PRE> |
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FileChannel in = new FileInputStream("thefile.dbf").getChannel();
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DbaseFileReader r = new DbaseFileReader( in ) |
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int fields = r.getHeader().getNumFields(); |
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while (r.hasNext()) {
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DbaseFileReader.Row row = r.readRow(); |
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for (int i = 0; i < fields; i++) {
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// do stuff |
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Foo.bar( row.read(i) ); |
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} |
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} |
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r.close(); |
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</PRE></CODE> |
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<P>
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<P>
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<DL>
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<DT><B>Author:</B></DT> |
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<DD>Ian Schneider</DD> |
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</DL>
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<HR>
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<P>
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<!-- ======== NESTED CLASS SUMMARY ======== -->
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<B>Nested Class Summary</B></FONT></TD> |
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> class</CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.Row.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp">DbaseFileReaderNIO.Row</A></B></CODE> |
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<BR>
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</TD> |
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</TR>
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</TABLE>
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<!-- =========== FIELD SUMMARY =========== -->
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<A NAME="constructor_summary"><!-- --></A> |
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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<TD COLSPAN=2><FONT SIZE="+2"> |
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<B>Constructor Summary</B></FONT></TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#DbaseFileReaderNIO(java.nio.channels.ReadableByteChannel)">DbaseFileReaderNIO</A></B>(java.nio.channels.ReadableByteChannel channel)</CODE> |
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<BR>
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Creates a new instance of DBaseFileReader</TD> |
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</TR>
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</TABLE>
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<!-- ========== METHOD SUMMARY =========== -->
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<A NAME="method_summary"><!-- --></A> |
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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<TD COLSPAN=2><FONT SIZE="+2"> |
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<B>Method Summary</B></FONT></TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> void</CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#close()">close</A></B>()</CODE> |
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<BR>
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Clean up all resources associated with this reader.</TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> <A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileHeaderNIO.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp">DbaseFileHeaderNIO</A></CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#getHeader()">getHeader</A></B>()</CODE> |
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<BR>
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Get the header from this file. </TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> boolean</CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#hasNext()">hasNext</A></B>()</CODE> |
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<BR>
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Query the reader as to whether there is another record.</TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE>static void</CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#main(java.lang.String[])">main</A></B>(java.lang.String[] args)</CODE> |
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<BR>
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</TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> java.lang.Object[]</CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#readEntry()">readEntry</A></B>()</CODE> |
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<BR>
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Get the next record (entry). </TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> java.lang.Object[]</CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#readEntry(java.lang.Object[])">readEntry</A></B>(java.lang.Object[] entry)</CODE> |
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<BR>
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Copy the next entry into the array.</TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> java.lang.Object[]</CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#readEntry(java.lang.Object[], int)">readEntry</A></B>(java.lang.Object[] entry, |
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int offset)</CODE> |
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<BR>
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Copy the next record into the array starting at offset.</TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> <A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.Row.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp">DbaseFileReaderNIO.Row</A></CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#readRow()">readRow</A></B>()</CODE> |
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<BR>
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</TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> void</CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#skip()">skip</A></B>()</CODE> |
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<BR>
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Skip the next record.</TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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<CODE> void</CODE></FONT></TD> |
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<TD><CODE><B><A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.html#transferTo(com.iver.cit.gvsig.fmap.drivers.shp.DbaseFileWriterNIO)">transferTo</A></B>(<A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileWriterNIO.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp">DbaseFileWriterNIO</A> writer)</CODE> |
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<BR>
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Transfer, by bytes, the next record to the writer.</TD> |
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</TR>
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</TABLE>
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<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
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<TD><B>Methods inherited from class java.lang.Object</B></TD> |
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor"> |
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD> |
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</TR>
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</TABLE>
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<P>
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<!-- ============ FIELD DETAIL =========== -->
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<A NAME="constructor_detail"><!-- --></A> |
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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<TD COLSPAN=1><FONT SIZE="+2"> |
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<B>Constructor Detail</B></FONT></TD> |
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</TR>
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</TABLE>
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<A NAME="DbaseFileReaderNIO(java.nio.channels.ReadableByteChannel)"><!-- --></A><H3> |
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DbaseFileReaderNIO</H3>
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<PRE>
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public <B>DbaseFileReaderNIO</B>(java.nio.channels.ReadableByteChannel channel) |
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throws java.io.IOException</PRE>
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<DL>
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<DD>Creates a new instance of DBaseFileReader
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<P>
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<DT><B>Parameters:</B><DD><CODE>channel</CODE> - The readable channel to use. |
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<DT><B>Throws:</B> |
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<DD><CODE>java.io.IOException</CODE> - If an error occurs while initializing.</DL> |
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<!-- ============ METHOD DETAIL ========== -->
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<A NAME="method_detail"><!-- --></A> |
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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<TD COLSPAN=1><FONT SIZE="+2"> |
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<B>Method Detail</B></FONT></TD> |
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</TR>
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</TABLE>
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<A NAME="getHeader()"><!-- --></A><H3> |
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getHeader</H3>
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<PRE>
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public <A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileHeaderNIO.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp">DbaseFileHeaderNIO</A> <B>getHeader</B>()</PRE> |
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<DL>
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<DD>Get the header from this file. The header is read upon instantiation.
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<P>
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<DD><DL> |
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<DT><B>Returns:</B><DD>The header associated with this file or null if an error occurred.</DL> |
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</DD>
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</DL>
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<HR>
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<A NAME="close()"><!-- --></A><H3> |
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close</H3>
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<PRE>
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public void <B>close</B>() |
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throws java.io.IOException</PRE>
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<DL>
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<DD>Clean up all resources associated with this reader.<B>Highly recomended.</B> |
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<P>
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<DD><DL> |
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<DT><B>Throws:</B> |
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<DD><CODE>java.io.IOException</CODE> - If an error occurs.</DL> |
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</DD>
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</DL>
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<HR>
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<A NAME="hasNext()"><!-- --></A><H3> |
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hasNext</H3>
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<PRE>
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public boolean <B>hasNext</B>()</PRE> |
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<DL>
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<DD>Query the reader as to whether there is another record.
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<P>
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<DD><DL> |
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<DT><B>Returns:</B><DD>True if more records exist, false otherwise.</DL> |
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</DD>
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</DL>
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<HR>
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<A NAME="readEntry()"><!-- --></A><H3> |
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readEntry</H3>
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<PRE>
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public java.lang.Object[] <B>readEntry</B>() |
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throws java.io.IOException</PRE>
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<DL>
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<DD>Get the next record (entry). Will return a new array of values.
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<P>
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<DD><DL> |
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<DT><B>Returns:</B><DD>A new array of values. |
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<DT><B>Throws:</B> |
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<DD><CODE>java.io.IOException</CODE> - If an error occurs.</DL> |
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</DD>
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</DL>
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<HR>
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<A NAME="readRow()"><!-- --></A><H3> |
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readRow</H3>
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<PRE>
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public <A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.Row.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp">DbaseFileReaderNIO.Row</A> <B>readRow</B>() |
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throws java.io.IOException</PRE>
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<DL>
|
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<DD><DL> |
| 381 |
|
| 382 |
<DT><B>Throws:</B> |
| 383 |
<DD><CODE>java.io.IOException</CODE></DL> |
| 384 |
</DD>
|
| 385 |
</DL>
|
| 386 |
<HR>
|
| 387 |
|
| 388 |
<A NAME="skip()"><!-- --></A><H3> |
| 389 |
skip</H3>
|
| 390 |
<PRE>
|
| 391 |
public void <B>skip</B>() |
| 392 |
throws java.io.IOException</PRE>
|
| 393 |
<DL>
|
| 394 |
<DD>Skip the next record.
|
| 395 |
<P>
|
| 396 |
<DD><DL> |
| 397 |
|
| 398 |
<DT><B>Throws:</B> |
| 399 |
<DD><CODE>java.io.IOException</CODE> - If an error occurs.</DL> |
| 400 |
</DD>
|
| 401 |
</DL>
|
| 402 |
<HR>
|
| 403 |
|
| 404 |
<A NAME="readEntry(java.lang.Object[], int)"><!-- --></A><H3> |
| 405 |
readEntry</H3>
|
| 406 |
<PRE>
|
| 407 |
public java.lang.Object[] <B>readEntry</B>(java.lang.Object[] entry, |
| 408 |
int offset)
|
| 409 |
throws java.io.IOException</PRE>
|
| 410 |
<DL>
|
| 411 |
<DD>Copy the next record into the array starting at offset.
|
| 412 |
<P>
|
| 413 |
<DD><DL> |
| 414 |
<DT><B>Parameters:</B><DD><CODE>entry</CODE> - Th array to copy into.<DD><CODE>offset</CODE> - The offset to start at |
| 415 |
<DT><B>Returns:</B><DD>The same array passed in. |
| 416 |
<DT><B>Throws:</B> |
| 417 |
<DD><CODE>java.io.IOException</CODE> - If an error occurs.</DL> |
| 418 |
</DD>
|
| 419 |
</DL>
|
| 420 |
<HR>
|
| 421 |
|
| 422 |
<A NAME="transferTo(com.iver.cit.gvsig.fmap.drivers.shp.DbaseFileWriterNIO)"><!-- --></A><H3> |
| 423 |
transferTo</H3>
|
| 424 |
<PRE>
|
| 425 |
public void <B>transferTo</B>(<A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileWriterNIO.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp">DbaseFileWriterNIO</A> writer) |
| 426 |
throws java.io.IOException</PRE>
|
| 427 |
<DL>
|
| 428 |
<DD>Transfer, by bytes, the next record to the writer.
|
| 429 |
<P>
|
| 430 |
<DD><DL> |
| 431 |
|
| 432 |
<DT><B>Throws:</B> |
| 433 |
<DD><CODE>java.io.IOException</CODE></DL> |
| 434 |
</DD>
|
| 435 |
</DL>
|
| 436 |
<HR>
|
| 437 |
|
| 438 |
<A NAME="readEntry(java.lang.Object[])"><!-- --></A><H3> |
| 439 |
readEntry</H3>
|
| 440 |
<PRE>
|
| 441 |
public java.lang.Object[] <B>readEntry</B>(java.lang.Object[] entry) |
| 442 |
throws java.io.IOException</PRE>
|
| 443 |
<DL>
|
| 444 |
<DD>Copy the next entry into the array.
|
| 445 |
<P>
|
| 446 |
<DD><DL> |
| 447 |
<DT><B>Parameters:</B><DD><CODE>entry</CODE> - The array to copy into. |
| 448 |
<DT><B>Returns:</B><DD>The same array passed in. |
| 449 |
<DT><B>Throws:</B> |
| 450 |
<DD><CODE>java.io.IOException</CODE> - If an error occurs.</DL> |
| 451 |
</DD>
|
| 452 |
</DL>
|
| 453 |
<HR>
|
| 454 |
|
| 455 |
<A NAME="main(java.lang.String[])"><!-- --></A><H3> |
| 456 |
main</H3>
|
| 457 |
<PRE>
|
| 458 |
public static void <B>main</B>(java.lang.String[] args) |
| 459 |
throws java.lang.Exception</PRE>
|
| 460 |
<DL>
|
| 461 |
<DD><DL> |
| 462 |
|
| 463 |
<DT><B>Throws:</B> |
| 464 |
<DD><CODE>java.lang.Exception</CODE></DL> |
| 465 |
</DD>
|
| 466 |
</DL>
|
| 467 |
<!-- ========= END OF CLASS DATA ========= -->
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<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> |
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<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> |
| 497 |
<A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileNIO.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp"><B>PREV CLASS</B></A> |
| 498 |
<A HREF="../../../../../../../com/iver/cit/gvsig/fmap/drivers/shp/DbaseFileReaderNIO.Row.html" title="class in com.iver.cit.gvsig.fmap.drivers.shp"><B>NEXT CLASS</B></A></FONT></TD> |
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