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BreadthFirstWalk (OpenJPA Parent POM 2.4.0 API)
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org.apache.openjpa.lib.graph</FONT>
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Class BreadthFirstWalk</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>org.apache.openjpa.lib.graph.BreadthFirstWalk</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>BreadthFirstWalk</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>
<p>Performs a breadth-first walk of a given <A HREF="../../../../../org/apache/openjpa/lib/graph/Graph.html" title="class in org.apache.openjpa.lib.graph"><CODE>Graph</CODE></A>,
notifying visitors as it sees each node. See the BFS algorithm
in the book 'Introduction to Algorithms' by Cormen, Leiserson, and
Rivest.</p>
<p/>
<p>Each <A HREF="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph"><CODE>GraphVisitor</CODE></A> will be notified when a node
is colored black (nodeVisited), edge seen (edgeVisited),
and a node is seen for the first time, i.e. colored gray (nodeSeen).</p>
<P>
<P>
<DL>
<DT><B>Since:</B></DT>
<DD>1.0.0</DD>
<DT><B>Author:</B></DT>
<DD>Steve Kim</DD>
</DL>
<HR>
<P>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#BreadthFirstWalk(org.apache.openjpa.lib.graph.Graph)">BreadthFirstWalk</A></B>(<A HREF="../../../../../org/apache/openjpa/lib/graph/Graph.html" title="class in org.apache.openjpa.lib.graph">Graph</A>&nbsp;graph)</CODE>
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<!-- ========== METHOD SUMMARY =========== -->
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#addGraphVisitor(org.apache.openjpa.lib.graph.GraphVisitor)">addGraphVisitor</A></B>(<A HREF="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph">GraphVisitor</A>&nbsp;visitor)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;add a <A HREF="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph"><CODE>GraphVisitor</CODE></A> to be notified during breadth first search.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#edgeVisited(org.apache.openjpa.lib.graph.Edge)">edgeVisited</A></B>(<A HREF="../../../../../org/apache/openjpa/lib/graph/Edge.html" title="class in org.apache.openjpa.lib.graph">Edge</A>&nbsp;edge)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;An edge is seen.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#enqueue(java.lang.Object, org.apache.openjpa.lib.graph.NodeInfo)">enqueue</A></B>(<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>&nbsp;node,
org.apache.openjpa.lib.graph.NodeInfo&nbsp;info)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Push the given node onto the queue to be processed.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#removeGraphVisitor(org.apache.openjpa.lib.graph.GraphVisitor)">removeGraphVisitor</A></B>(<A HREF="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph">GraphVisitor</A>&nbsp;visitor)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;remove a given <A HREF="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph"><CODE>GraphVisitor</CODE></A> from the listener set.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#visit(java.lang.Object, org.apache.openjpa.lib.graph.NodeInfo)">visit</A></B>(<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>&nbsp;node,
org.apache.openjpa.lib.graph.NodeInfo&nbsp;info)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Visit the node.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#walk()">walk</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Begins the breadth first traversal.</TD>
</TR>
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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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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<A NAME="BreadthFirstWalk(org.apache.openjpa.lib.graph.Graph)"><!-- --></A><H3>
BreadthFirstWalk</H3>
<PRE>
public <B>BreadthFirstWalk</B>(<A HREF="../../../../../org/apache/openjpa/lib/graph/Graph.html" title="class in org.apache.openjpa.lib.graph">Graph</A>&nbsp;graph)</PRE>
<DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
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<A NAME="walk()"><!-- --></A><H3>
walk</H3>
<PRE>
public void <B>walk</B>()</PRE>
<DL>
<DD>Begins the breadth first traversal.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="enqueue(java.lang.Object, org.apache.openjpa.lib.graph.NodeInfo)"><!-- --></A><H3>
enqueue</H3>
<PRE>
protected void <B>enqueue</B>(<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>&nbsp;node,
org.apache.openjpa.lib.graph.NodeInfo&nbsp;info)</PRE>
<DL>
<DD>Push the given node onto the queue to be processed.
Notify visitors.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="visit(java.lang.Object, org.apache.openjpa.lib.graph.NodeInfo)"><!-- --></A><H3>
visit</H3>
<PRE>
protected void <B>visit</B>(<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>&nbsp;node,
org.apache.openjpa.lib.graph.NodeInfo&nbsp;info)</PRE>
<DL>
<DD>Visit the node. Mark the node black and notify visitors.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="edgeVisited(org.apache.openjpa.lib.graph.Edge)"><!-- --></A><H3>
edgeVisited</H3>
<PRE>
protected void <B>edgeVisited</B>(<A HREF="../../../../../org/apache/openjpa/lib/graph/Edge.html" title="class in org.apache.openjpa.lib.graph">Edge</A>&nbsp;edge)</PRE>
<DL>
<DD>An edge is seen. Notify visitors.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="addGraphVisitor(org.apache.openjpa.lib.graph.GraphVisitor)"><!-- --></A><H3>
addGraphVisitor</H3>
<PRE>
public void <B>addGraphVisitor</B>(<A HREF="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph">GraphVisitor</A>&nbsp;visitor)</PRE>
<DL>
<DD>add a <A HREF="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph"><CODE>GraphVisitor</CODE></A> to be notified during breadth first search.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="removeGraphVisitor(org.apache.openjpa.lib.graph.GraphVisitor)"><!-- --></A><H3>
removeGraphVisitor</H3>
<PRE>
public void <B>removeGraphVisitor</B>(<A HREF="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph">GraphVisitor</A>&nbsp;visitor)</PRE>
<DL>
<DD>remove a given <A HREF="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph"><CODE>GraphVisitor</CODE></A> from the listener set.
<P>
<DD><DL>
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