mifdatastorefactory.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="getDisplayName()"><!-- --></A><H3>
getDisplayName</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>getDisplayName</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></B></DD>
<DD>Name suitable for display to end user.

 <p>
 A non localized display name for this data store type.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#getDisplayName()">getDisplayName</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>A short name suitable for display in a user interface.</DL>
</DD>
</DL>
<HR>

<A NAME="createDataStore(java.util.Map)"><!-- --></A><H3>
createDataStore</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A> <B>createDataStore</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A>&nbsp;params)
                          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><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></B></DD>
<DD>Construct a live data source using the params specifed.

 <p>
 You can think of this as setting up a connection to the back end data
 source.
 </p>

 <p>
 Magic Params: the following params are magic and are honoured by
 convention by the GeoServer and uDig application.

 <ul>
 <li>
 "user": is taken to be the user name
 </li>
 <li>
 "passwd": is taken to be the password
 </li>
 <li>
 "namespace": is taken to be the namespace prefix (and will be kept in
 sync with GeoServer namespace management.
 </li>
 </ul>

 When we eventually move over to the use of OpperationalParam we will
 have to find someway to codify this convention.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#createDataStore(java.util.Map)">createDataStore</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>params</CODE> - The full set of information needed to construct a live
        data store. Typical key values for the map include: url -
        location of a resource, used by file reading datasources. dbtype
        - the type of the database to connect to, e.g. postgis, mysql
<DT><B>Returns:</B><DD>The created DataStore, this may be null if the required resource
         was not found or if insufficent parameters were given. Note
         that canProcess() should have returned false if the problem is
         to do with insuficent parameters.
<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="createNewDataStore(java.util.Map)"><!-- --></A><H3>
createNewDataStore</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A> <B>createNewDataStore</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A>&nbsp;params)
                             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><p>
 As the creation of new MIF files is simply achieved by createSchema()
 calls, this method simply calls createDataStore().
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#createNewDataStore(java.util.Map)">createNewDataStore</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>params</CODE> - The parameter map
<DT><B>Returns:</B><DD>the MIFDataStore instance returned by createDataStore(params)
<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><DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/mif/MIFDataStoreFactory.html#createDataStore(java.util.Map)"><CODE>createDataStore(Map)</CODE></A></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><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></B></DD>
<DD>Describe the nature of the datasource constructed by this factory.

 <p>
 A non localized description of this data store type.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#getDescription()">getDescription</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>A human readable description that is suitable for inclusion in a
         list of available datasources.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#getDescription()"><CODE>DataStoreFactorySpi.getDescription()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getParametersInfo()"><!-- --></A><H3>
getParametersInfo</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/DataStoreFactorySpi.Param.html" title="class in org.geotools.data">DataStoreFactorySpi.Param</A>[] <B>getParametersInfo</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></B></DD>
<DD>MetaData about the required Parameters (for createDataStore).

 <p>
 Interpretation of FeatureDescriptor values:
 </p>

 <ul>
 <li>
 getDisplayName(): Gets the localized display name of this feature.
 </li>
 <li>
 getName(): Gets the programmatic name of this feature (used as the key
 in params)
 </li>
 <li>
 getShortDescription(): Gets the short description of this feature.
 </li>
 </ul>

 <p>
 This should be the same as:
 </p>
 <pre><code>
 Object params = factory.getParameters();
 BeanInfo info = getBeanInfo( params );

 return info.getPropertyDescriptors();
 <code></pre>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#getParametersInfo()">getParametersInfo</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Param array describing the Map for createDataStore<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#getParametersInfo()"><CODE>DataStoreFactorySpi.getParametersInfo()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="canProcess(java.util.Map)"><!-- --></A><H3>
canProcess</H3>
<PRE>
public boolean <B>canProcess</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A>&nbsp;params)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></B></DD>
<DD>Test to see if this factory is suitable for processing the data pointed
 to by the params map.

 <p>
 If this datasource requires a number of parameters then this mehtod
 should check that they are all present and that they are all valid. If
 the datasource is a file reading data source then the extentions or
 mime types of any files specified should be checked. For example, a
 Shapefile datasource should check that the url param ends with shp,
 such tests should be case insensative.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#canProcess(java.util.Map)">canProcess</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>params</CODE> - The full set of information needed to construct a live
        data source.
<DT><B>Returns:</B><DD>booean true if and only if this factory can process the resource
         indicated by the param set and all the required params are
         pressent.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#canProcess(java.util.Map)"><CODE>DataStoreFactorySpi.canProcess(java.util.Map)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="isAvailable()"><!-- --></A><H3>
isAvailable</H3>
<PRE>
public boolean <B>isAvailable</B>()</PRE>
<DL>
<DD><p>
 This method always returns true, because no specific libraries are
 required by MIFDataStore.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#isAvailable()">isAvailable</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html" title="interface in org.geotools.data">DataStoreFactorySpi</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD><tt>true</tt> if and only if this factory has all the
         appropriate jars on the classpath to create DataStores.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/DataStoreFactorySpi.html#isAvailable()"><CODE>DataStoreFactorySpi.isAvailable()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getImplementationHints()"><!-- --></A><H3>
getImplementationHints</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A> <B>getImplementationHints</B>()</PRE>
<DL>
<DD><p>
 Always return Collections#EMPTY_MAP, because no hints are available for
 now.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/factory/Factory.html#getImplementationHints()">getImplementationHints</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/factory/Factory.html" title="interface in org.geotools.factory">Factory</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The map of hints, or an <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Collections.html#EMPTY_MAP" title="class or interface in java.util">empty map</A>
         if none.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/factory/Factory.html#getImplementationHints()"><CODE>Factory.getImplementationHints()</CODE></A></DL>
</DD>
</DL>
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