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Cursor
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org.semanticweb.kaon2.api</FONT>
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Interface Cursor<E></H2>
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<DL>
<DT><PRE>public interface <B>Cursor<E></B></DL>
</PRE>
<P>
This interface enables sequential access to a result set of a search. After creation, the cursor is before the first object, i.e. <code>next()</code> should be called before calling <code>currentObject()</code>. A cursor should be closed after usage, otherwise resource leak is risked. Opening a cursor locks the connection for reading. Cursors are not thread-safe objects; for accessing objects from different threads, open separate cursors.
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/semanticweb/kaon2/api/Cursor.html#close()">close</A></B>()</CODE>
<BR>
Closes the cursor and releases all resources used.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/semanticweb/kaon2/api/Cursor.html#hasNext()">hasNext</A></B>()</CODE>
<BR>
Returns <code>true</code> if there are more objects in the cursor, i.e.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/semanticweb/kaon2/api/Cursor.html#isOpen()">isOpen</A></B>()</CODE>
<BR>
Returns <code>true</code> if the cursor is open.</TD>
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<CODE> <A HREF="../../../../org/semanticweb/kaon2/api/Cursor.html" title="type parameter in Cursor">E</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/semanticweb/kaon2/api/Cursor.html#next()">next</A></B>()</CODE>
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Returns the current objects and moves the cursor to the next object.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/semanticweb/kaon2/api/Cursor.html#size()">size</A></B>()</CODE>
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Returns the number of objects in the cursor.</TD>
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<A NAME="isOpen()"><!-- --></A><H3>
isOpen</H3>
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boolean <B>isOpen</B>()
throws <A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></PRE>
<DL>
<DD>Returns <code>true</code> if the cursor is open.
<P>
<DD><DL>
<DT><B>Returns:</B><DD><code>true</code> if the cursor is open
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></CODE> - thrown if there is an error</DL>
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<A NAME="size()"><!-- --></A><H3>
size</H3>
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int <B>size</B>()
throws <A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></PRE>
<DL>
<DD>Returns the number of objects in the cursor.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the number of objects in the cursor
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></CODE> - thrown if there is an error</DL>
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<A NAME="next()"><!-- --></A><H3>
next</H3>
<PRE>
<A HREF="../../../../org/semanticweb/kaon2/api/Cursor.html" title="type parameter in Cursor">E</A> <B>next</B>()
throws <A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></PRE>
<DL>
<DD>Returns the current objects and moves the cursor to the next object. If there is no current object, an exception is thrown.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the current object
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></CODE> - thrown if there is an error (e.g. there is no next object)</DL>
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<A NAME="hasNext()"><!-- --></A><H3>
hasNext</H3>
<PRE>
boolean <B>hasNext</B>()
throws <A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></PRE>
<DL>
<DD>Returns <code>true</code> if there are more objects in the cursor, i.e. if <code>next()</code> can safely be called without returning an error.
<P>
<DD><DL>
<DT><B>Returns:</B><DD><code>true</code> if there are more objects in the cursor
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></CODE> - thrown if there is an error</DL>
</DD>
</DL>
<HR>
<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
void <B>close</B>()
throws <A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></PRE>
<DL>
<DD>Closes the cursor and releases all resources used.
<P>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/semanticweb/kaon2/api/KAON2Exception.html" title="class in org.semanticweb.kaon2.api">KAON2Exception</A></CODE> - thrown if there is an error</DL>
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