hsqldatastorefactory.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

 <li>
 passwd
 </li>
 <li>
 dbfilename
 </li>
 </ul>
<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> - Set of parameters needed for a hsql data store.
<DT><B>Returns:</B><DD><code>true</code> if dbtype equals hsql, and contains keys for
         host, user, passwd, and database.</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>Construct a hsql data store using the params.
<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 source.  Should have  dbtype equal to 'hsql', as well as
        dbfilename, user, passwd, and namespace (optional).
<DT><B>Returns:</B><DD>The created DataSource, 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> - See DataSourceException</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>DOCUMENT ME!
<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> - 
<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> - See UnsupportedOperationException</DL>
</DD>
</DL>
<HR>

<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>DOCUMENT ME!
<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>"HSQL"</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>Describe the nature of the datasource constructed by this factory.
<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.  Currently uses the string "HSQL
         Database"</DL>
</DD>
</DL>
<HR>

<A NAME="isAvailable()"><!-- --></A><H3>
isAvailable</H3>
<PRE>
public boolean <B>isAvailable</B>()</PRE>
<DL>
<DD>Test to see if this datastore is available, if it has all the
 appropriate libraries to construct a datastore.  This datastore just
 returns true for now.  This method is used for gui apps, so as to not
 advertise data store capabilities they don't actually have.
<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 is available to create
         DataStores.</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>Describe parameters.
<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="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><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/factory/Factory.html" title="interface in org.geotools.factory">Factory</A></CODE></B></DD>
<DD>Map of  hints (maybe <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Collections.html#unmodifiableMap(java.util.Map)" title="class or interface in java.util">unmodifiable</A>)
 used by this factory to customize its use. This map is <strong>not</strong> guaranteed
 to contains all the hints supplied by the user; it may be only a subset. Consequently,
 hints provided here are usually not suitable for creating new factories, unless the
 implementation make some additional garantees (e.g.
 <A HREF="../../../../org/geotools/factory/FactoryUsingVolatileDependencies.html" title="class in org.geotools.factory"><CODE>FactoryUsingVolatileDependencies</CODE></A>).
 <p>
 The primary purpose of this method is to determine if an <strong>existing</strong>
 factory instance can be reused for a set of user-supplied hints. This method is invoked by
 <A HREF="../../../../org/geotools/factory/FactoryRegistry.html" title="class in org.geotools.factory"><CODE>FactoryRegistry</CODE></A> in order to compare this factory's hints against user's hints.
 This is dependency introspection only;  <strong>never</strong>
 invokes this method for creating new factories.
 <p>
 Keys are usually static constants from the <A HREF="../../../../org/geotools/factory/Hints.html" title="class in org.geotools.factory"><CODE>Hints</CODE></A> class, while values are
 instances of some key-dependent class. The <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Map.html#keySet()" title="class or interface in java.util">key set</A> must contains
 at least all hints impacting functionality. While the key set may contains all hints
 supplied by the user, it is recommended to limit the set to only the hints used by this
 particular factory instance. A minimal set will helps <A HREF="../../../../org/geotools/factory/FactoryRegistry.html" title="class in org.geotools.factory"><CODE>FactoryRegistry</CODE></A> to compares
 only hints that matter and avoid the creation of unnecessary instances of this factory.
 <p>
 The hint values may be different than the one supplied by the user. If a user supplied a
 hint as a <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Class.html" title="class or interface in java.lang"><CODE>Class</CODE></A> object, this method shall replace it by the actual instance used, if
 possible.
 <p>
 Implementations of this method are usually quite simple. For example if a
 datum authority factory
 uses an ordinary datum factory,
 its method could be implemented as below (note that we should not check if the datum
 factory is null, since key with null value is the expected behaviour in this case).
 Example:

 <pre><code>
 Map hints = new HashMap();
 hints.put(<A HREF="../../../../org/geotools/factory/Hints.html#DATUM_FACTORY">Hints.DATUM_FACTORY</A>, datumFactory);
 return hints;
 </code></pre>
<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>Returns the implementation hints. The default implementation returns en
 empty map.</DL>
</DD>
</DL>
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