featurestore.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="addFeatures(org.geotools.data.FeatureReader)"><!-- --></A><H3>
addFeatures</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Set.html" title="class or interface in java.util">Set</A> <B>addFeatures</B>(<A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A>&nbsp;reader)
                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>Deprecated.</B>&nbsp;<I>Please use addFeatures( FeatureCollection )</I>
<P>
<DD>Adds all features from the passed feature reader "stream".
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - The reader from which to add the features.
<DT><B>Returns:</B><DD>the FeatureIds of the newly added features.
<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 anything goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="addFeatures(org.geotools.feature.FeatureCollection)"><!-- --></A><H3>
addFeatures</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Set.html" title="class or interface in java.util">Set</A> <B>addFeatures</B>(<A HREF="../../../org/geotools/feature/FeatureCollection.html" title="interface in org.geotools.feature">FeatureCollection</A>&nbsp;collection)
                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>Adds all features from the passed feature collection to the datasource.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>collection</CODE> - The collection of features to add.
<DT><B>Returns:</B><DD>the FeatureIds of the newly added features.
<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 anything goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="removeFeatures(org.geotools.filter.Filter)"><!-- --></A><H3>
removeFeatures</H3>
<PRE>
public void <B>removeFeatures</B>(<A HREF="../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A>&nbsp;filter)
                    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>Removes all of the features specificed by the passed filter from the
 collection.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>filter</CODE> - An OpenGIS filter; specifies which features to remove.
<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 anything goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="modifyFeatures(org.geotools.feature.AttributeType[], java.lang.Object[], org.geotools.filter.Filter)"><!-- --></A><H3>
modifyFeatures</H3>
<PRE>
public void <B>modifyFeatures</B>(<A HREF="../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A>[]&nbsp;type,
                           <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,
                           <A HREF="../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A>&nbsp;filter)
                    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>Modifies the passed attribute types with the passed objects in all
 features that correspond to the passed OGS filter.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>type</CODE> - The attributes to modify.<DD><CODE>value</CODE> - The values to put in the attribute types.<DD><CODE>filter</CODE> - An OGC filter to note which attributes to modify.
<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 the attribute and object arrays are not eqaul
         length, if the object types do not match the attribute types,
         or if there are backend errors.</DL>
</DD>
</DL>
<HR>

<A NAME="modifyFeatures(org.geotools.feature.AttributeType, java.lang.Object, org.geotools.filter.Filter)"><!-- --></A><H3>
modifyFeatures</H3>
<PRE>
public void <B>modifyFeatures</B>(<A HREF="../../../org/geotools/feature/AttributeType.html" title="interface in org.geotools.feature">AttributeType</A>&nbsp;type,
                           <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,
                           <A HREF="../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A>&nbsp;filter)
                    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>Modifies the passed attribute types with the passed objects in all
 features that correspond to the passed OGS filter.  A convenience
 method for single attribute modifications.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>type</CODE> - The attributes to modify.<DD><CODE>value</CODE> - The values to put in the attribute types.<DD><CODE>filter</CODE> - An OGC filter to note which attributes to modify.
<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 modificaton is not supported, if the object type
         do not match the attribute type.</DL>
</DD>
</DL>
<HR>

<A NAME="setFeatures(org.geotools.data.FeatureReader)"><!-- --></A><H3>
setFeatures</H3>
<PRE>
public void <B>setFeatures</B>(<A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A>&nbsp;reader)
                 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>Deletes the all the current Features of this datasource and adds the new
 collection.  Primarily used as a convenience method for file
 datasources.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - - the collection to be written
<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 there are any datasource errors.</DL>
</DD>
</DL>
<HR>

<A NAME="setTransaction(org.geotools.data.Transaction)"><!-- --></A><H3>
setTransaction</H3>
<PRE>
public void <B>setTransaction</B>(<A HREF="../../../org/geotools/data/Transaction.html" title="interface in org.geotools.data">Transaction</A>&nbsp;transaction)</PRE>
<DL>
<DD>Provides a transaction for commit/rollback control of this FeatureStore.

 <p>
 This method operates as a replacement for setAutoCommitMode.  When a
 transaction is provided you are no longer automatically committing.
 </p>

 <p>
 In order to return to AutoCommit mode supply the Transaction.AUTO_COMMIT
 to this method. Since this represents a return to AutoCommit mode the
 previous Transaction will be commited.
 </p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>transaction</CODE> - DOCUMENT ME!</DL>
</DD>
</DL>
<HR>

<A NAME="getTransaction()"><!-- --></A><H3>
getTransaction</H3>
<PRE>
public <A HREF="../../../org/geotools/data/Transaction.html" title="interface in org.geotools.data">Transaction</A> <B>getTransaction</B>()</PRE>
<DL>
<DD>Used to access the Transaction this DataSource is currently opperating
 against.

 <p>
 Example Use: adding features to a road DataSource
 </p>
 <pre><code>
 Transaction t = roads.getTransaction();
 try{
     roads.addFeatures( features );
     roads.getTransaction().commit();
 }
 catch( IOException erp ){
     //something went wrong;
     roads.getTransaction().rollback();
 }
 </code></pre>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Transaction in use, or <code>Transaction.AUTO_COMMIT</code></DL>
</DD>
</DL>
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