vpfcolumn.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="isGeometry()"><!-- --></A><H3>
isGeometry</H3>
<PRE>
public boolean <B>isGeometry</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="isNillable()"><!-- --></A><H3>
isNillable</H3>
<PRE>
public boolean <B>isNillable</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></B></DD>
<DD>Returns whether nulls are allowed for this attribute.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/feature/AttributeType.html#isNillable()">isNillable</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true if nulls are permitted, false otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="parse(java.lang.Object)"><!-- --></A><H3>
parse</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>parse</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;value)
             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><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></B></DD>
<DD>Allows this AttributeType to convert an argument to its prefered storage
 type. If no parsing is possible, returns the original value. If a parse
 is attempted, yet fails (i.e. a poor decimal format) throw the
 Exception. This is mostly for use internally in Features, but
 implementors should simply follow the rules to be safe.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/feature/AttributeType.html#parse(java.lang.Object)">parse</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - the object to attempt parsing of.
<DT><B>Returns:</B><DD><code>value</code> converted to the preferred storage of this
         <code>AttributeType</code>.  If no parsing was possible then
         the same object is returned.
<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 parsing is attempted and is
         unsuccessful.</DL>
</DD>
</DL>
<HR>

<A NAME="validate(java.lang.Object)"><!-- --></A><H3>
validate</H3>
<PRE>
public void <B>validate</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;obj)
              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><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></B></DD>
<DD>Whether the tested object passes the validity constraints of  this
 AttributeType.  At a minimum it should be of the correct class
 specified by <A HREF="../../../../org/geotools/feature/AttributeType.html#getType()"><CODE>AttributeType.getType()</CODE></A>, non-null if isNillable is
 <tt>false</tt>, and a geometry if isGeometry is <tt>true</tt>.  If The
 object does not validate then an IllegalArgumentException reporting the
 error in validation should be thrown.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/feature/AttributeType.html#validate(java.lang.Object)">validate</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>obj</CODE> - The object to be tested for validity.
<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 the object does not validate.</DL>
</DD>
</DL>
<HR>

<A NAME="getTypeChar()"><!-- --></A><H3>
getTypeChar</H3>
<PRE>
public char <B>getTypeChar</B>()</PRE>
<DL>
<DD>Returns the typeChar field
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Returns the typeChar.</DL>
</DD>
</DL>
<HR>

<A NAME="getElementsNumber()"><!-- --></A><H3>
getElementsNumber</H3>
<PRE>
public int <B>getElementsNumber</B>()</PRE>
<DL>
<DD>Returns the elementsNumber field
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Returns the elementsNumber.</DL>
</DD>
</DL>
<HR>

<A NAME="getGeometryAttributeType()"><!-- --></A><H3>
getGeometryAttributeType</H3>
<PRE>
public <A HREF="../../../../org/geotools/feature/GeometryAttributeType.html" title="interface in org.geotools.feature">GeometryAttributeType</A> <B>getGeometryAttributeType</B>()</PRE>
<DL>
<DD>Identifies and returns the GeometryAttributeType,
 or null if none exists.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The <code>GeometryAttributeType</code> value</DL>
</DD>
</DL>
<HR>

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

<DT><B>Returns:</B><DD>Returns the attemptLookup.</DL>
</DD>
</DL>
<HR>

<A NAME="getRestriction()"><!-- --></A><H3>
getRestriction</H3>
<PRE>
public <A HREF="../../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A> <B>getRestriction</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></B></DD>
<DD>This represents a Facet in XML schema ... for example can be used to
 represent the max length of 20 for a string.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/feature/AttributeType.html#getRestriction()">getRestriction</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Filter, or Filter.NONE if no restriction is needed.</DL>
</DD>
</DL>
<HR>

<A NAME="getMinOccurs()"><!-- --></A><H3>
getMinOccurs</H3>
<PRE>
public int <B>getMinOccurs</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></B></DD>
<DD>Returns the Min number of occurences ...
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/feature/AttributeType.html#getMinOccurs()">getMinOccurs</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getMaxOccurs()"><!-- --></A><H3>
getMaxOccurs</H3>
<PRE>
public int <B>getMaxOccurs</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></B></DD>
<DD>Returns the Max number of occurences ...
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/feature/AttributeType.html#getMaxOccurs()">getMaxOccurs</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A></CODE></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;obj)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
public int <B>hashCode</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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