abstractgridcoveragereader.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

               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>Gets the <CODE>GridCoverage</CODE> name at the specified index. The default implementation
 returns the input path, or the "Untitled" string if input is not a <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/File.html" title="class or interface in java.io"><CODE>File</CODE></A> or an
 <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net"><CODE>URL</CODE></A> object.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the image to be queried.
<DT><B>Returns:</B><DD>The name for the <CODE>GridCoverage</CODE> at the specified index.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the input source has not been set.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang">IndexOutOfBoundsException</A></CODE> - if the supplied index is out of bounds.
<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> - if an error occurs reading the width information from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="getCoordinateReferenceSystem(int)"><!-- --></A><H3>
getCoordinateReferenceSystem</H3>
<PRE>
public abstract CoordinateReferenceSystem <B>getCoordinateReferenceSystem</B>(int&nbsp;index)
                                                                                            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>Returns the coordinate reference system for the <CODE>GridCoverage</CODE> to be read.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the image to be queried.
<DT><B>Returns:</B><DD>The coordinate reference system for the <CODE>GridCoverage</CODE> at the specified index.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the input source has not been set.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang">IndexOutOfBoundsException</A></CODE> - if the supplied index is out of bounds.
<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> - if an error occurs reading the width information from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="getEnvelope(int)"><!-- --></A><H3>
getEnvelope</H3>
<PRE>
public abstract Envelope <B>getEnvelope</B>(int&nbsp;index)
                                                                 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>Returns the envelope for the <CODE>GridCoverage</CODE> to be read.
 The envelope must have the same number of dimensions than the
 coordinate reference system.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the image to be queried.
<DT><B>Returns:</B><DD>The envelope for the <CODE>GridCoverage</CODE> at the specified index.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the input source has not been set.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang">IndexOutOfBoundsException</A></CODE> - if the supplied index is out of bounds.
<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> - if an error occurs reading the width information from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="getGridRange(int)"><!-- --></A><H3>
getGridRange</H3>
<PRE>
public GridRange <B>getGridRange</B>(int&nbsp;index)
                                                 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>Returns the grid range for the <CODE>GridCoverage</CODE> to be read.
 The grid range must have the same number of dimensions than the
 envelope.

 The default implementation construct a <CODE>GridRange</CODE> object
 using information provided by <A HREF="http://java.sun.com/j2se/1.4/docs/api/javax/imageio/ImageReader.html#getWidth(int)" title="class or interface in javax.imageio"><CODE>ImageReader.getWidth(int)</CODE></A> and
 <A HREF="http://java.sun.com/j2se/1.4/docs/api/javax/imageio/ImageReader.html#getHeight(int)" title="class or interface in javax.imageio"><CODE>ImageReader.getHeight(int)</CODE></A>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the image to be queried.
<DT><B>Returns:</B><DD>The grid range for the <CODE>GridCoverage</CODE> at the specified index.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the input source has not been set.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang">IndexOutOfBoundsException</A></CODE> - if the supplied index is out of bounds.
<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> - if an error occurs reading the width information from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="getSampleDimensions(int)"><!-- --></A><H3>
getSampleDimensions</H3>
<PRE>
public SampleDimension[] <B>getSampleDimensions</B>(int&nbsp;index)
                                                           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>Returns the sample dimensions for each band of the <CODE>GridCoverage</CODE>
 to be read. If sample dimensions are not known, then this method returns
 . The default implementation always returns .
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the image to be queried.
<DT><B>Returns:</B><DD>The category lists for the <CODE>GridCoverage</CODE> at the specified index.
         This array's length must be equals to the number of bands in <CODE>GridCoverage</CODE>.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the input source has not been set.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang">IndexOutOfBoundsException</A></CODE> - if the supplied index is out of bounds.
<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> - if an error occurs reading the width information from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="getGridCoverage(int)"><!-- --></A><H3>
getGridCoverage</H3>
<PRE>
public GridCoverage <B>getGridCoverage</B>(int&nbsp;index)
                                                       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>Read the grid coverage. The default implementation gets the default <A HREF="http://java.sun.com/j2se/1.4/docs/api/javax/imageio/ImageReadParam.html" title="class or interface in javax.imageio"><CODE>ImageReadParam</CODE></A>
 and checks if it is an instance of <CODE>RawBinaryImageReadParam</CODE>. If it is, this method
 then invokes <CODE>RawBinaryImageReadParam#setStreamImageSize</CODE> with informations provided
 by <A HREF="../../../../org/geotools/coverage/io/AbstractGridCoverageReader.html#getGridRange(int)"><CODE>getGridRange(int)</CODE></A>. Finally, a grid coverage is constructed using informations provided
 by <A HREF="../../../../org/geotools/coverage/io/AbstractGridCoverageReader.html#getName(int)"><CODE>getName(int)</CODE></A>, <A HREF="../../../../org/geotools/coverage/io/AbstractGridCoverageReader.html#getCoordinateReferenceSystem(int)"><CODE>getCoordinateReferenceSystem(int)</CODE></A> and <A HREF="../../../../org/geotools/coverage/io/AbstractGridCoverageReader.html#getEnvelope(int)"><CODE>getEnvelope(int)</CODE></A>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the image to be queried.
<DT><B>Returns:</B><DD>The <CODE>GridCoverage</CODE> at the specified index.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the input source has not been set.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang">IndexOutOfBoundsException</A></CODE> - if the supplied index is out of bounds.
<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> - if an error occurs reading the width information from the input source.</DL>
</DD>
</DL>
<HR>

<A NAME="getImageReaders(java.lang.Object)"><!-- --></A><H3>
getImageReaders</H3>
<PRE>
protected <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Iterator.html" title="class or interface in java.util">Iterator</A> <B>getImageReaders</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>&nbsp;input)</PRE>
<DL>
<DD>Returns an <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Iterator.html" title="class or interface in java.util"><CODE>Iterator</CODE></A> containing all currently registered
 <A HREF="http://java.sun.com/j2se/1.4/docs/api/javax/imageio/ImageReader.html" title="class or interface in javax.imageio"><CODE>ImageReader</CODE></A>s that claim to be able to decode the image.
 The default implementation returns
 <code>ImageIO.getImageReadersByFormatName(<A HREF="../../../../org/geotools/coverage/io/AbstractGridCoverageReader.html#formatName"><CODE>formatName</CODE></A>)</code>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>input</CODE> - The input source.</DL>
</DD>
</DL>
<HR>

<A NAME="setLocale(java.util.Locale)"><!-- --></A><H3>
setLocale</H3>
<PRE>
public void <B>setLocale</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Locale.html" title="class or interface in java.util">Locale</A>&nbsp;locale)</PRE>
<DL>
<DD>Sets the current <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Locale.html" title="class or interface in java.util"><CODE>Locale</CODE></A> of this <code>AbstractGridCoverageReader</code>
 to the given value. A value of <code>null</code> removes any previous
 setting, and indicates that the reader should localize as it sees fit.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getLocale()"><!-- --></A><H3>
getLocale</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Locale.html" title="class or interface in java.util">Locale</A> <B>getLocale</B>()</PRE>
<DL>
<DD>Returns the currently set <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Locale.html" title="class or interface in java.util"><CODE>Locale</CODE></A>, or  if none has been set.
<P>
<DD><DL>
</DL>
</DD>
</DL>
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