abstractoperation.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

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<B>Constructor Detail</B></FONT></TD>
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<A NAME="AbstractOperation(org.opengis.parameter.ParameterDescriptorGroup)"><!-- --></A><H3>
AbstractOperation</H3>
<PRE>
public <B>AbstractOperation</B>(ParameterDescriptorGroup&nbsp;descriptor)</PRE>
<DL>
<DD>Constructs an operation. The operation name will be the same than the
 parameter descriptor name.
<P>
<DT><B>Parameters:</B><DD><CODE>descriptor</CODE> - The parameters descriptor.</DL>

<!-- ============ METHOD DETAIL ========== -->

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<B>Method Detail</B></FONT></TD>
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<A NAME="getName()"><!-- --></A><H3>
getName</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getName</B>()</PRE>
<DL>
<DD>Returns the name of the processing operation. The default implementation
 returns the <A HREF="../../../../org/geotools/coverage/processing/AbstractOperation.html#descriptor">descriptor</A> code name.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getName</CODE> in interface <CODE>Operation</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getDescription()"><!-- --></A><H3>
getDescription</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getDescription</B>()</PRE>
<DL>
<DD>Returns the description of the processing operation. If there is no description,
 returns . The default implementation returns the <A HREF="../../../../org/geotools/coverage/processing/AbstractOperation.html#descriptor">descriptor</A>
 remarks.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getDescription</CODE> in interface <CODE>Operation</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getDocURL()"><!-- --></A><H3>
getDocURL</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getDocURL</B>()</PRE>
<DL>
<DD>Returns the URL for documentation on the processing operation. If no online documentation
 is available the string will be null. The default implementation returns .
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getDocURL</CODE> in interface <CODE>Operation</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getVersion()"><!-- --></A><H3>
getVersion</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getVersion</B>()</PRE>
<DL>
<DD>Returns the version number of the implementation.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getVersion</CODE> in interface <CODE>Operation</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getVendor()"><!-- --></A><H3>
getVendor</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getVendor</B>()</PRE>
<DL>
<DD>Returns the vendor name of the processing operation implementation.
 The default implementation returns "Geotools 2".
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getVendor</CODE> in interface <CODE>Operation</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getNumSources()"><!-- --></A><H3>
getNumSources</H3>
<PRE>
public int <B>getNumSources</B>()</PRE>
<DL>
<DD>Returns the number of source coverages required for the operation.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getNumSources</CODE> in interface <CODE>Operation</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getParameters()"><!-- --></A><H3>
getParameters</H3>
<PRE>
public ParameterValueGroup <B>getParameters</B>()</PRE>
<DL>
<DD>Returns an initially empty set of parameters.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getParameters</CODE> in interface <CODE>Operation</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="doOperation(org.opengis.parameter.ParameterValueGroup, org.geotools.factory.Hints)"><!-- --></A><H3>
doOperation</H3>
<PRE>
public abstract Coverage <B>doOperation</B>(ParameterValueGroup&nbsp;parameters,
                                     <A HREF="../../../../org/geotools/factory/Hints.html" title="class in org.geotools.factory">Hints</A>&nbsp;hints)
                                                   throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Applies a process operation to a coverage. This method is invoked by <A HREF="../../../../org/geotools/coverage/processing/DefaultProcessor.html" title="class in org.geotools.coverage.processing"><CODE>DefaultProcessor</CODE></A>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>parameters</CODE> - List of name value pairs for the parameters required for the operation.<DD><CODE>hints</CODE> - A set of rendering hints, or  if none. The 
         may provides hints for the following keys: <A HREF="../../../../org/geotools/factory/Hints.html#COORDINATE_OPERATION_FACTORY"><CODE>Hints.COORDINATE_OPERATION_FACTORY</CODE></A>
         and <A HREF="../../../../org/geotools/factory/Hints.html#JAI_INSTANCE"><CODE>Hints.JAI_INSTANCE</CODE></A>.
<DT><B>Returns:</B><DD>The result as a coverage.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.</DL>
</DD>
</DL>
<HR>

<A NAME="getProcessor(java.awt.RenderingHints)"><!-- --></A><H3>
getProcessor</H3>
<PRE>
protected static <A HREF="../../../../org/geotools/coverage/processing/AbstractProcessor.html" title="class in org.geotools.coverage.processing">AbstractProcessor</A> <B>getProcessor</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/RenderingHints.html" title="class or interface in java.awt">RenderingHints</A>&nbsp;hints)</PRE>
<DL>
<DD>Returns the <A HREF="../../../../org/geotools/coverage/processing/AbstractProcessor.html" title="class in org.geotools.coverage.processing"><CODE>AbstractProcessor</CODE></A> instance used for an operation. The instance is fetch
 from the rendering hints given to the <A HREF="../../../../org/geotools/coverage/processing/AbstractOperation.html#doOperation(org.opengis.parameter.ParameterValueGroup, org.geotools.factory.Hints)"><CODE>doOperation(org.opengis.parameter.ParameterValueGroup, org.geotools.factory.Hints)</CODE></A> method. If no processor is
 specified, then a default one is returned.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>hints</CODE> - The rendering hints, or  if none.
<DT><B>Returns:</B><DD>The  instance in use (never ).</DL>
</DD>
</DL>
<HR>

<A NAME="ensureNonNull(java.lang.String, java.lang.Object)"><!-- --></A><H3>
ensureNonNull</H3>
<PRE>
protected static void <B>ensureNonNull</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;name,
                                    <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;object)
                             throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></PRE>
<DL>
<DD>Makes sure that an argument is non-null. This is a convenience method for
 implementations in subclasses.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - Argument name.<DD><CODE>object</CODE> - User argument.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if  is null.</DL>
</DD>
</DL>
<HR>

<A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
public int <B>hashCode</B>()</PRE>
<DL>
<DD>Returns a hash value for this operation. This value need not remain consistent between
 different implementations of the same class.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
public boolean <B>equals</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;object)</PRE>
<DL>
<DD>Compares the specified object with this operation for equality.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>toString</B>()</PRE>
<DL>
<DD>Returns a string repr閟entation of this operation. The returned string is
 implementation dependent. It is usually provided for debugging purposes only.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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