abstractdatastore2.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

<DT><B>Parameters:</B><DD><CODE>typeName</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></DL>
</DD>
</DL>
<HR>

<A NAME="getView(org.geotools.data.Query)"><!-- --></A><H3>
getView</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/FeatureSource.html" title="interface in org.geotools.data">FeatureSource</A> <B>getView</B>(<A HREF="../../../../org/geotools/data/Query.html" title="interface in org.geotools.data">Query</A>&nbsp;query)
                      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>,
                             <A HREF="../../../../org/geotools/feature/SchemaException.html" title="class in org.geotools.feature">SchemaException</A></PRE>
<DL>
<DD>Create a FeatureSource that represents your Query.
 <p>
 If we can make this part of the public API, we can phase out FeatureResults.
 (and reduce the number of classes people need to know about).
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStore.html#getView(org.geotools.data.Query)">getView</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>query</CODE> - Query.getTypeName() locates FeatureType being viewed
<DT><B>Returns:</B><DD>FeatureSource providing opperations for featureType
<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> - If FeatureSource is not available
<DD><CODE><A HREF="../../../../org/geotools/feature/SchemaException.html" title="class in org.geotools.feature">SchemaException</A></CODE> - If fetureType is not covered by existing schema</DL>
</DD>
</DL>
<HR>

<A NAME="getFeatureSource(java.lang.String)"><!-- --></A><H3>
getFeatureSource</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/FeatureSource.html" title="interface in org.geotools.data">FeatureSource</A> <B>getFeatureSource</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;typeName)
                               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>Aqure FeatureSource for indicated typeName.
 <p>
 Note this API is not sufficient; Namespace needs to be used as well.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStore.html#getFeatureSource(java.lang.String)">getFeatureSource</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>typeName</CODE> - 
<DT><B>Returns:</B><DD>FeatureSource (or subclass) providing opperations for typeName
<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="getFeatureReader(org.geotools.data.Query, org.geotools.data.Transaction)"><!-- --></A><H3>
getFeatureReader</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A> <B>getFeatureReader</B>(<A HREF="../../../../org/geotools/data/Query.html" title="interface in org.geotools.data">Query</A>&nbsp;query,
                                      <A HREF="../../../../org/geotools/data/Transaction.html" title="interface in org.geotools.data">Transaction</A>&nbsp;transaction)
                               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>Access a FeatureReader providing access to Feature information.
 <p>
 This implementation passes off responsibility to the following overrideable methods:
 <ul>
 <li>getFeatureReader(String typeName) - subclass *required* to implement
 </ul>
 </p>
 <p>If you can handle some aspects of Query natively (say expressions or reprojection) override the following:
 <li>
 <li>getFeatureReader(typeName, query) - override to handle query natively
 <li>getUnsupportedFilter(typeName, filter) - everything you cannot handle natively
 <li>getFeatureReader(String typeName) - you must implement this, but you could point it back to getFeatureReader( typeName, Query.ALL );
 </ul>
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStore.html#getFeatureReader(org.geotools.data.Query, org.geotools.data.Transaction)">getFeatureReader</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>query</CODE> - Requested form of the returned Features and the filter used
              to constraints the results<DD><CODE>transaction</CODE> - Transaction this query opperates against
<DT><B>Returns:</B><DD>FeatureReader Allows Sequential Processing of featureType
<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="getFeatureWriter(java.lang.String, org.geotools.filter.Filter, org.geotools.data.Transaction)"><!-- --></A><H3>
getFeatureWriter</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</A> <B>getFeatureWriter</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;typeName,
                                      <A HREF="../../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A>&nbsp;filter,
                                      <A HREF="../../../../org/geotools/data/Transaction.html" title="interface in org.geotools.data">Transaction</A>&nbsp;transaction)
                               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/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE></B></DD>
<DD>Access FeatureWriter for modification of existing DataStore contents.

 <p>
 To limit FeatureWriter to the FeatureTypes defined by this DataStore,
 typeName is used to indicate FeatureType. The resulting
 feature writer will allow modifications against the
 same FeatureType provided by getSchema( typeName )
 </p>

 <p>
 The FeatureWriter will provide access to the existing contents of the
 FeatureType referenced by typeName. The provided filter will be used
 to skip over Features as required.
 </p>

 <b>Notes For Implementing DataStore</b>
 </p>

 <p>
 The returned FeatureWriter <b>does not</b> support the addition of new
 Features to FeatureType (it would need to police your modifications to
 agree with <code>filer</code>).  As such it will return
 <code>false</code> for getNext() when it reaches the end of the Query
 and NoSuchElementException when next() is called.
 </p>

 <p>
 Helper classes for implementing a FeatureWriter (in order):
 </p>
 <li>
 InProcessLockingManager.checkedWriter( writer )
 - provides a check against locks before allowing modification

 <li>
 FilteringFeatureWriter
 - filtering support for FeatureWriter (does not allow new content)
 </li>
 <li>
 DiffFeatureWriter
 - In-Process Transaction Support (see TransactionStateDiff)
 </li>
 <li>
 EmptyFeatureWriter
 - provides no content for Filter.ALL optimizations
 </li>
 </ul>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStore.html#getFeatureWriter(java.lang.String, org.geotools.filter.Filter, org.geotools.data.Transaction)">getFeatureWriter</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>typeName</CODE> - Indicates featureType to be modified<DD><CODE>filter</CODE> - constraints used to limit the modification<DD><CODE>transaction</CODE> - Transaction this query opperates against
<DT><B>Returns:</B><DD>FeatureWriter Allows Sequential Modification of featureType
<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="getFeatureWriter(java.lang.String, org.geotools.data.Transaction)"><!-- --></A><H3>
getFeatureWriter</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</A> <B>getFeatureWriter</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;typeName,
                                      <A HREF="../../../../org/geotools/data/Transaction.html" title="interface in org.geotools.data">Transaction</A>&nbsp;transaction)
                               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>TODO summary sentence for getFeatureWriter ...
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStore.html#getFeatureWriter(java.lang.String, org.geotools.data.Transaction)">getFeatureWriter</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>typeName</CODE> - <DD><CODE>transaction</CODE> - 
<DT><B>Returns:</B><DD>FeatureWriter
<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/DataStore.html#getFeatureWriter(java.lang.String, org.geotools.data.Transaction)"><CODE>DataStore.getFeatureWriter(java.lang.String, org.geotools.data.Transaction)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getFeatureWriterAppend(java.lang.String, org.geotools.data.Transaction)"><!-- --></A><H3>
getFeatureWriterAppend</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</A> <B>getFeatureWriterAppend</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;typeName,
                                            <A HREF="../../../../org/geotools/data/Transaction.html" title="interface in org.geotools.data">Transaction</A>&nbsp;transaction)
                                     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>FeatureWriter setup to add new content.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStore.html#getFeatureWriterAppend(java.lang.String, org.geotools.data.Transaction)">getFeatureWriterAppend</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>typeName</CODE> - <DD><CODE>transaction</CODE> - 
<DT><B>Returns:</B><DD>FeatureWriter already skipped to the end
<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/DataStore.html#getFeatureWriterAppend(java.lang.String, org.geotools.data.Transaction)"><CODE>DataStore.getFeatureWriterAppend(java.lang.String, org.geotools.data.Transaction)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getLockingManager()"><!-- --></A><H3>
getLockingManager</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/LockingManager.html" title="interface in org.geotools.data">LockingManager</A> <B>getLockingManager</B>()</PRE>
<DL>
<DD>Locking manager used for this DataStore.

 <p>
 By default AbstractDataStore makes use of InProcessLockingManager.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStore.html#getLockingManager()">getLockingManager</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>DataStores may return <code>null</code>, if the handling locking
         in another fashion.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/DataStore.html#getLockingManager()"><CODE>DataStore.getLockingManager()</CODE></A></DL>
</DD>
</DL>
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