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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="duplicate(org.geotools.feature.Feature)"><!-- --></A><H3>
duplicate</H3>
<PRE>
public <A HREF="../../../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A> <B>duplicate</B>(<A HREF="../../../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A>&nbsp;feature)
                  throws <A HREF="../../../../../org/geotools/feature/IllegalAttributeException.html" title="class in org.geotools.feature">IllegalAttributeException</A></PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></B></DD>
<DD>Create a duplicate of the provided feature, must delegate to an appropriate FeatureFactory
 create method.
 <p>
 The implementation is assumed to make use of AttributeType duplicate as required for a deep
 copy.
 </p>

 //@deprecated This method will be removed in 2.2, please use FeatureFactory obtained from FactoryFinder
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html#duplicate(org.geotools.feature.Feature)">duplicate</A></CODE> in interface <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>feature</CODE> - 
<DT><B>Returns:</B><DD>a deep copy of feature
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../org/geotools/feature/IllegalAttributeException.html" title="class in org.geotools.feature">IllegalAttributeException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="find(org.geotools.feature.AttributeType)"><!-- --></A><H3>
find</H3>
<PRE>
public int <B>find</B>(<A HREF="../../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A>&nbsp;type)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></B></DD>
<DD>Find the position of a given AttributeType.
 <p>
 Match is based on attribute type name, the resulting index
 may be used with getAttributeType( index ).
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html#find(org.geotools.feature.AttributeType)">find</A></CODE> in interface <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>type</CODE> - The type to search for.
<DT><B>Returns:</B><DD>-1 if not found, a zero-based index if found.</DL>
</DD>
</DL>
<HR>

<A NAME="getAncestors()"><!-- --></A><H3>
getAncestors</H3>
<PRE>
public <A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A>[] <B>getAncestors</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></B></DD>
<DD>Obtain an array of this FeatureType's direct ancestors.
 Implementors should return a non-null array (may be of length 0).
 <p>
 <ul>
 <li>length 0 - a root FeatureType
 <li>length 1 - singe inhieratance
 <li>length 1+ - multiple inheiratance, order is not significant
 </ul>
 </p>
 GetAncestors() indicates *just* the direct parents of this FeatureType.
 It capures the inheirtance relationship from the OGC overview document.
 </p>
 <p>
 Example Code:<pre><code>
 public FeatureType getAncestors()}
     return new FeatureType[]{ getSuper(), };
 }
 </code></pre>
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html#getAncestors()">getAncestors</A></CODE> in interface <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>An array of ancestors.</DL>
</DD>
</DL>
<HR>

<A NAME="getAttributeCount()"><!-- --></A><H3>
getAttributeCount</H3>
<PRE>
public int <B>getAttributeCount</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></B></DD>
<DD>The number of attribues defined by this schema.
 <p>
 This method to allows access to the complete schema as defined by this
 FeatureType and its ancestors.
 </p>
 <p>
 <ul>
 Notes:
 <li>
 <li>for FeatureType with no super type this count value is the the
     same as getAttributeTypes().length.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html#getAttributeCount()">getAttributeCount</A></CODE> in interface <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>number of distinct attributeTypes available, taking ancestors and taking overrides
         into account.</DL>
</DD>
</DL>
<HR>

<A NAME="getAttributeType(int)"><!-- --></A><H3>
getAttributeType</H3>
<PRE>
public <A HREF="../../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A> <B>getAttributeType</B>(int&nbsp;position)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></B></DD>
<DD>Gets the schema attributeType at the specified index.
 <p>
 The index is specified with respect to the entire Schema (as defined by this FeatureType and
 it's ancestors).
 <p>
 <ul>
 The index value should not be used with either:
 <li>FeatureType.getAttributeTypes()[index] - as it defines only attributes contributed by
 this FeatureType
 <li>Feature.getAttribute( index ) - as attributes order may or may not be in sequence
 </ul>
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html#getAttributeType(int)">getAttributeType</A></CODE> in interface <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>position</CODE> - a integer index into the complete schema represented by 
                 this FeatureType and its ancestors
<DT><B>Returns:</B><DD>the attribute type at the specified position</DL>
</DD>
</DL>
<HR>

<A NAME="getAttributeType(java.lang.String)"><!-- --></A><H3>
getAttributeType</H3>
<PRE>
public <A HREF="../../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A> <B>getAttributeType</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;xPath)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></B></DD>
<DD>Gets the attributeType at this xPath, if the specified attributeType does
 not exist then <code>null</code> is returned.
 <p>
 Question: it is unclear how this interacts with the complete schema defined by this
 FeatureType and its ancestors (in which a given xpath may refer to several AttributeTypes as
 restrictions are applied.
 </p>
 <p>
 Perhaps this method should be restricted to a FlatFeatureType? Or should have the option of
 returning an array of matching AttributeType in order of inheiritence?
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html#getAttributeType(java.lang.String)">getAttributeType</A></CODE> in interface <CODE><A HREF="../../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>xPath</CODE> - XPath pointer to attribute type.
<DT><B>Returns:</B><DD>AttributeType, or null if unavaialble</DL>
</DD>
</DL>
<HR>

<A NAME="getAttributeTypes()"><!-- --></A><H3>
getAttributeTypes</H3>
<PR