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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>IndexedDbaseFileReader (Geotools 2.3.x 2.3.2 API)</TITLE><META NAME="keywords" CONTENT="org.geotools.data.shapefile.dbf.IndexedDbaseFileReader class"><META NAME="keywords" CONTENT="goTo()"><META NAME="keywords" CONTENT="IsRandomAccessEnabled()"><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="IndexedDbaseFileReader (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/IndexedDbaseFileReader.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/DbaseFileWriter.FieldFormatter.html" title="class in org.geotools.data.shapefile.dbf"><B>PREV CLASS</B></A> NEXT CLASS</FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="IndexedDbaseFileReader.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_classes_inherited_from_class_org.geotools.data.shapefile.dbf.DbaseFileReader">NESTED</A> | <A HREF="#fields_inherited_from_class_DbaseFileReader">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: FIELD | <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 IndexedDbaseFileReader</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"><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html" title="class in org.geotools.data.shapefile.dbf">DbaseFileReader</A> <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by"><B>IndexedDbaseFileReader</B></PRE><HR><DL><DT>public class <B>IndexedDbaseFileReader</B><DT>extends <A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html" title="class in org.geotools.data.shapefile.dbf">DbaseFileReader</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, Tommaso Nolli</DD><DT><B>Module:</B></DT><DD><CODE><B>ext/shape</B></CODE> (<A HREF="http://maven.geotools.fr/repository/org/geotools/gt2-shape/"><CODE>gt2-shape.jar</CODE></A>) (<A HREF="http://maven.geotools.fr/reports/shape/index.html">Maven report</A>) (<A HREF="http://svn.geotools.org/geotools/tags/2.3.2/ext/shape/src/org/geotools/data/shapefile/dbf/IndexedDbaseFileReader.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></TABLE> <A NAME="nested_classes_inherited_from_class_org.geotools.data.shapefile.dbf.DbaseFileReader"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Nested classes inherited from class <A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html" title="class in org.geotools.data.shapefile.dbf">DbaseFileReader</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.Row.html" title="class in org.geotools.data.shapefile.dbf">DbaseFileReader.Row</A></CODE></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></TABLE> <A NAME="fields_inherited_from_class_DbaseFileReader"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from class <A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html" title="class in org.geotools.data.shapefile.dbf">DbaseFileReader</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#currentOffset">currentOffset</A>, <A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#randomAccessEnabled">randomAccessEnabled</A>, <A HREF="../../../../../org/geotools/data/shapefile/dbf/DbaseFileReader.html#useMemoryMappedBuffer">useMemoryMappedBuffer</A></CODE></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/IndexedDbaseFileReader.html#IndexedDbaseFileReader(java.nio.channels.ReadableByteChannel)">IndexedDbaseFileReader</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)</CODE><BR> Like calling DbaseFileReader(ReadableByteChannel, true);</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/geotools/data/shapefile/dbf/IndexedDbaseFileReader.html#IndexedDbaseFileReader(java.nio.channels.ReadableByteChannel, boolean)">IndexedDbaseFileReader</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>⌨️ 快捷键说明
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