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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.4.2_13) on Tue Jun 05 11:36:36 GMT-05:00 2007 --><META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><TITLE>DbaseFileReader (Geotools 2.3.x 2.3.2 API)</TITLE><META NAME="keywords" CONTENT="org.geotools.data.shapefile.dbf.DbaseFileReader class"><META NAME="keywords" CONTENT="useMemoryMappedBuffer"><META NAME="keywords" CONTENT="randomAccessEnabled"><META NAME="keywords" CONTENT="currentOffset"><META NAME="keywords" CONTENT="fill()"><META NAME="keywords" CONTENT="getHeader()"><META NAME="keywords" CONTENT="close()"><META NAME="keywords" CONTENT="hasNext()"><META NAME="keywords" CONTENT="readEntry()"><META NAME="keywords" CONTENT="readRow()"><META NAME="keywords" CONTENT="skip()"><META NAME="keywords" CONTENT="transferTo()"><META NAME="keywords" CONTENT="main()"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="DbaseFileReader (Geotools 2.3.x 2.3.2 API)";}</SCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/DbaseFileReader.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileHeader.html" title="class in org.geotools.data.shapefile.dbf"><B>PREV CLASS</B></A> <A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.Row.html" title="class in org.geotools.data.shapefile.dbf"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="DbaseFileReader.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.geotools.data.shapefile.dbf</FONT><BR>Class DbaseFileReader</H2><PRE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by"><B>DbaseFileReader</B></PRE><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../../org/geotools/data/shapefile/dbf/IndexedDbaseFileReader.html" title="class in org.geotools.data.shapefile.dbf">IndexedDbaseFileReader</A></DD></DL><HR><DL><DT>public class <B>DbaseFileReader</B><DT>extends <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></DL><P>A DbaseFileReader is used to read a dbase III format file. <br> The general use of this class is: <CODE><PRE> FileChannel in = new FileInputStream("thefile.dbf").getChannel(); DbaseFileReader r = new DbaseFileReader( in ) Object[] fields = new Object[r.getHeader().getNumFields()]; while (r.hasNext()) { r.readEntry(fields); // do stuff } r.close(); </PRE></CODE> For consumers who wish to be a bit more selective with their reading of rows, the Row object has been added. The semantics are the same as using the readEntry method, but remember that the Row object is always the same. The values are parsed as they are read, so it pays to copy them out (as each call to Row.read() will result in an expensive String parse). <br> <b>EACH CALL TO readEntry OR readRow ADVANCES THE FILE!</b><br> An example of using the Row method of reading: <CODE><PRE> FileChannel in = new FileInputStream("thefile.dbf").getChannel(); DbaseFileReader r = new DbaseFileReader( in ) int fields = r.getHeader().getNumFields(); while (r.hasNext()) { DbaseFileReader.Row row = r.readRow(); for (int i = 0; i < fields; i++) { // do stuff Foo.bar( row.read(i) ); } } r.close(); </PRE></CODE><P><P><DL><DT><B>Author:</B></DT> <DD>Ian Schneider</DD><DT><B>Module:</B></DT><DD><CODE><B>plugin/shapefile</B></CODE> (<A HREF="http://maven.geotools.fr/repository/org/geotools/gt2-shapefile/"><CODE>gt2-shapefile.jar</CODE></A>) (<A HREF="http://maven.geotools.fr/reports/shapefile/index.html">Maven report</A>) (<A HREF="http://svn.geotools.org/geotools/tags/2.3.2/plugin/shapefile/src/org/geotools/data/shapefile/dbf/DbaseFileReader.java">SVN head</A>)</DD></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><A NAME="nested_class_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Nested Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> class</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.Row.html" title="class in org.geotools.data.shapefile.dbf">DbaseFileReader.Row</A></B></CODE><BR> </TD></TR></TABLE> <!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#currentOffset">currentOffset</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#randomAccessEnabled">randomAccessEnabled</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#useMemoryMappedBuffer">useMemoryMappedBuffer</A></B></CODE><BR> </TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#DbaseFileReader(java.nio.channels.ReadableByteChannel, boolean)">DbaseFileReader</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/nio/channels/ReadableByteChannel.html" title="class or interface in java.nio.channels">ReadableByteChannel</A> channel, boolean useMemoryMappedBuffer)</CODE><BR> Creates a new instance of DBaseFileReader</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#close()">close</A></B>()</CODE><BR> Clean up all resources associated with this reader.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#fill(java.nio.ByteBuffer, java.nio.channels.ReadableByteChannel)">fill</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/nio/ByteBuffer.html" title="class or interface in java.nio">ByteBuffer</A> buffer, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/nio/channels/ReadableByteChannel.html" title="class or interface in java.nio.channels">ReadableByteChannel</A> channel)</CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileHeader.html" title="class in org.geotools.data.shapefile.dbf">DbaseFileHeader</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#getHeader()">getHeader</A></B>()</CODE><BR> Get the header from this file. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#hasNext()">hasNext</A></B>()</CODE><BR> Query the reader as to whether there is another record.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#main(java.lang.String[])">main</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[] args)</CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#readEntry()">readEntry</A></B>()</CODE><BR> Get the next record (entry). </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#readEntry(java.lang.Object[])">readEntry</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[] entry)</CODE><BR> Copy the next entry into the array.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#readEntry(java.lang.Object[], int)">readEntry</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[] entry, int offset)</CODE><BR> Copy the next record into the array starting at offset.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.Row.html" title="class in org.geotools.data.shapefile.dbf">DbaseFileReader.Row</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#readRow()">readRow</A></B>()</CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#skip()">skip</A></B>()</CODE><BR> Skip the next record.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#transferTo(org.geotools.data.shapefile.dbf.DbaseFileWriter)">transferTo</A></B>(<A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileWriter.html" title="class in org.geotools.data.shapefile.dbf">DbaseFileWriter</A> writer)</CODE><BR> Transfer, by bytes, the next record to the writer.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_Object"><!-- --></A>⌨️ 快捷键说明
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