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Conduit
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com.saxonica.stream</FONT>
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Class Conduit</H2>
<PRE>
<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>com.saxonica.stream.Conduit</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>Conduit</B><DT>extends <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
</PRE>
<P>
A Conduit is a communication channel from a Producer to a Consumer: the channel is used to pass
a sequence of items (and possibly an exception) from the producer to the consumer. This provides a
bridge beween a push pipeline and a pull pipeline, which operates by executing the push pipeline and
the pull pipeline in different threads.
<P>
<P>
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<P>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<TD><CODE><B><A HREF="../../../com/saxonica/stream/Conduit.html#Conduit()">Conduit</A></B>()</CODE>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/saxonica/stream/Conduit.html#close()">close</A></B>()</CODE>
<BR>
Interface allowing the consumer to indicate that no more items are required.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/saxonica/stream/Conduit.html#finish()">finish</A></B>()</CODE>
<BR>
Interface allowing the producer to indicate that there are no more items to come.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/saxonica/stream/Conduit.html#isClosed()">isClosed</A></B>()</CODE>
<BR>
Ask whether the conduit has been closed</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../net/sf/saxon/om/Item.html" title="interface in net.sf.saxon.om">Item</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/saxonica/stream/Conduit.html#read()">read</A></B>()</CODE>
<BR>
Interface allowing the consumer to read an Item.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/saxonica/stream/Conduit.html#signalProducerError(net.sf.saxon.trans.XPathException)">signalProducerError</A></B>(<A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A> exception)</CODE>
<BR>
Interface allowing the producer to indicate that a dynamic error has occurred.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/saxonica/stream/Conduit.html#write(net.sf.saxon.om.Item)">write</A></B>(<A HREF="../../../net/sf/saxon/om/Item.html" title="interface in net.sf.saxon.om">Item</A> value)</CODE>
<BR>
Interface allowing the producer to write an item.</TD>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
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<TD><CODE><A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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<B>Constructor Detail</B></FONT></TH>
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<A NAME="Conduit()"><!-- --></A><H3>
Conduit</H3>
<PRE>
public <B>Conduit</B>()</PRE>
<DL>
</DL>
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<A NAME="read()"><!-- --></A><H3>
read</H3>
<PRE>
public <A HREF="../../../net/sf/saxon/om/Item.html" title="interface in net.sf.saxon.om">Item</A> <B>read</B>()
throws <A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></PRE>
<DL>
<DD>Interface allowing the consumer to read an Item. The method suspends until an item
is available, or until the end of the sequence is notified by the producer, or until
an exception is notified by the producer.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the item supplied by the producer; or null to indicate that the end of the sequence
has been reached.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A></CODE> - if the producer signalled an exception</DL>
</DD>
</DL>
<HR>
<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
public void <B>close</B>()</PRE>
<DL>
<DD>Interface allowing the consumer to indicate that no more items are required.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="isClosed()"><!-- --></A><H3>
isClosed</H3>
<PRE>
public boolean <B>isClosed</B>()</PRE>
<DL>
<DD>Ask whether the conduit has been closed
<P>
<DD><DL>
<DT><B>Returns:</B><DD>true if the consumer has indicated that no more items are required</DL>
</DD>
</DL>
<HR>
<A NAME="write(net.sf.saxon.om.Item)"><!-- --></A><H3>
write</H3>
<PRE>
public void <B>write</B>(<A HREF="../../../net/sf/saxon/om/Item.html" title="interface in net.sf.saxon.om">Item</A> value)</PRE>
<DL>
<DD>Interface allowing the producer to write an item. The method will suspend if the queue of items
waiting to be read exceeds a certain threshold.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - The item to be written</DL>
</DD>
</DL>
<HR>
<A NAME="finish()"><!-- --></A><H3>
finish</H3>
<PRE>
public void <B>finish</B>()</PRE>
<DL>
<DD>Interface allowing the producer to indicate that there are no more items to come.
This method MUST be called at the end of the sequence, or the consumer will hang.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="signalProducerError(net.sf.saxon.trans.XPathException)"><!-- --></A><H3>
signalProducerError</H3>
<PRE>
public void <B>signalProducerError</B>(<A HREF="../../../net/sf/saxon/trans/XPathException.html" title="class in net.sf.saxon.trans">XPathException</A> exception)</PRE>
<DL>
<DD>Interface allowing the producer to indicate that a dynamic error has occurred. This
will be notified to the consumer by means of an exception from the next call on the read()
method.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>exception</CODE> - the error to be signalled</DL>
</DD>
</DL>
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