shapefilereader.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

<A NAME="supportsRandomAccess()"><!-- --></A><H3>
supportsRandomAccess</H3>
<PRE>
public boolean <B>supportsRandomAccess</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="hasNext()"><!-- --></A><H3>
hasNext</H3>
<PRE>
public boolean <B>hasNext</B>()
                throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>If there exists another record. Currently checks the stream for the
 presence of 8 more bytes, the length of a record. If this is true and the
 record indicates the next logical record number, there exists more
 records.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>True if has next record, false otherwise.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="transferTo(org.geotools.data.shapefile.shp.ShapefileWriter, int, double[])"><!-- --></A><H3>
transferTo</H3>
<PRE>
public int <B>transferTo</B>(<A HREF="../../../../../org/geotools/data/shapefile/shp/ShapefileWriter.html" title="class in org.geotools.data.shapefile.shp">ShapefileWriter</A>&nbsp;writer,
                      int&nbsp;recordNum,
                      double[]&nbsp;bounds)
               throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Transfer (by bytes) the data at the current record to the
 ShapefileWriter.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bounds</CODE> - double array of length four for transfering the bounds into
<DT><B>Returns:</B><DD>The length of the record transfered in bytes
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="nextRecord()"><!-- --></A><H3>
nextRecord</H3>
<PRE>
public <A HREF="../../../../../org/geotools/data/shapefile/shp/ShapefileReader.Record.html" title="class in org.geotools.data.shapefile.shp">ShapefileReader.Record</A> <B>nextRecord</B>()
                                  throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Fetch the next record information.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The record instance associated with this reader.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="goTo(int)"><!-- --></A><H3>
goTo</H3>
<PRE>
public void <B>goTo</B>(int&nbsp;offset)
          throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A>,
                 <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang">UnsupportedOperationException</A></PRE>
<DL>
<DD>Needs better data, what is the requirements for offset?
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>offset</CODE> - 
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang">UnsupportedOperationException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="shapeAt(int)"><!-- --></A><H3>
shapeAt</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <B>shapeAt</B>(int&nbsp;offset)
               throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A>,
                      <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang">UnsupportedOperationException</A></PRE>
<DL>
<DD>TODO needs better java docs!!! What is offset?
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>offset</CODE> - 
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang">UnsupportedOperationException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="recordAt(int)"><!-- --></A><H3>
recordAt</H3>
<PRE>
public <A HREF="../../../../../org/geotools/data/shapefile/shp/ShapefileReader.Record.html" title="class in org.geotools.data.shapefile.shp">ShapefileReader.Record</A> <B>recordAt</B>(int&nbsp;offset)
                                throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A>,
                                       <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang">UnsupportedOperationException</A></PRE>
<DL>
<DD>Sets the current location of the byteStream to offset and returns the
 next record. Usually used in conjuctions with the shx file or some other
 index file.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>offset</CODE> - If using an shx file the offset would be: 2 *
            (index.getOffset(i))
<DT><B>Returns:</B><DD>The record after the offset location in the bytestream
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - thrown in a read error occurs
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang">UnsupportedOperationException</A></CODE> - thrown if not a random access file</DL>
</DD>
</DL>
<HR>

<A NAME="getCount(int)"><!-- --></A><H3>
getCount</H3>
<PRE>
public int <B>getCount</B>(int&nbsp;count)
             throws <A HREF="../../../../../org/geotools/data/DataSourceException.html" title="class in org.geotools.data">DataSourceException</A></PRE>
<DL>
<DD>Parses the shpfile counting the records.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the number of non-null records in the shapefile
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../org/geotools/data/DataSourceException.html" title="class in org.geotools.data">DataSourceException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="main(java.lang.String[])"><!-- --></A><H3>
main</H3>
<PRE>
public static void <B>main</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>[]&nbsp;args)
                 throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Exception.html" title="class or interface in java.lang">Exception</A></PRE>
<DL>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Exception.html" title="class or interface in java.lang">Exception</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="setHandler(org.geotools.data.shapefile.shp.ShapeHandler)"><!-- --></A><H3>
setHandler</H3>
<PRE>
public void <B>setHandler</B>(<A HREF="../../../../../org/geotools/data/shapefile/shp/ShapeHandler.html" title="interface in org.geotools.data.shapefile.shp">ShapeHandler</A>&nbsp;handler)</PRE>
<DL>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>handler</CODE> - The handler to set.</DL>
</DD>
</DL>
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