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<div class="subTitle">org.apache.openjpa.lib.graph</div>
<h2 title="Class BreadthFirstWalk" class="title">Class BreadthFirstWalk</h2>
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<li>org.apache.openjpa.lib.graph.BreadthFirstWalk</li>
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<pre>public class <span class="strong">BreadthFirstWalk</span>
extends <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block"><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></div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>1.0.0</dd>
<dt><span class="strong">Author:</span></dt>
<dd>Steve Kim</dd></dl>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><strong><a href="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#BreadthFirstWalk(org.apache.openjpa.lib.graph.Graph)">BreadthFirstWalk</a></strong>(<a href="../../../../../org/apache/openjpa/lib/graph/Graph.html" title="class in org.apache.openjpa.lib.graph">Graph</a>&nbsp;graph)</code>&nbsp;</td>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#addGraphVisitor(org.apache.openjpa.lib.graph.GraphVisitor)">addGraphVisitor</a></strong>(<a href="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph">GraphVisitor</a>&nbsp;visitor)</code>
<div class="block">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.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#edgeVisited(org.apache.openjpa.lib.graph.Edge)">edgeVisited</a></strong>(<a href="../../../../../org/apache/openjpa/lib/graph/Edge.html" title="class in org.apache.openjpa.lib.graph">Edge</a>&nbsp;edge)</code>
<div class="block">An edge is seen.</div>
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</tr>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#enqueue(java.lang.Object,%20org.apache.openjpa.lib.graph.NodeInfo)">enqueue</a></strong>(<a href="http://docs.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>
<div class="block">Push the given node onto the queue to be processed.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#removeGraphVisitor(org.apache.openjpa.lib.graph.GraphVisitor)">removeGraphVisitor</a></strong>(<a href="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph">GraphVisitor</a>&nbsp;visitor)</code>
<div class="block">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.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#visit(java.lang.Object,%20org.apache.openjpa.lib.graph.NodeInfo)">visit</a></strong>(<a href="http://docs.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>
<div class="block">Visit the node.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/lib/graph/BreadthFirstWalk.html#walk()">walk</a></strong>()</code>
<div class="block">Begins the breadth first traversal.</div>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="http://docs.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://docs.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://docs.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://docs.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://docs.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://docs.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://docs.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://docs.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://docs.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://docs.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://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long,%20int)" title="class or interface in java.lang">wait</a></code></li>
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<h4>BreadthFirstWalk</h4>
<pre>public&nbsp;BreadthFirstWalk(<a href="../../../../../org/apache/openjpa/lib/graph/Graph.html" title="class in org.apache.openjpa.lib.graph">Graph</a>&nbsp;graph)</pre>
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<h4>walk</h4>
<pre>public&nbsp;void&nbsp;walk()</pre>
<div class="block">Begins the breadth first traversal.</div>
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<h4>enqueue</h4>
<pre>protected&nbsp;void&nbsp;enqueue(<a href="http://docs.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>
<div class="block">Push the given node onto the queue to be processed.
Notify visitors.</div>
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<a name="visit(java.lang.Object, org.apache.openjpa.lib.graph.NodeInfo)">
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<h4>visit</h4>
<pre>protected&nbsp;void&nbsp;visit(<a href="http://docs.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>
<div class="block">Visit the node. Mark the node black and notify visitors.</div>
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<a name="edgeVisited(org.apache.openjpa.lib.graph.Edge)">
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<h4>edgeVisited</h4>
<pre>protected&nbsp;void&nbsp;edgeVisited(<a href="../../../../../org/apache/openjpa/lib/graph/Edge.html" title="class in org.apache.openjpa.lib.graph">Edge</a>&nbsp;edge)</pre>
<div class="block">An edge is seen. Notify visitors.</div>
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<h4>addGraphVisitor</h4>
<pre>public&nbsp;void&nbsp;addGraphVisitor(<a href="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph">GraphVisitor</a>&nbsp;visitor)</pre>
<div class="block">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.</div>
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<h4>removeGraphVisitor</h4>
<pre>public&nbsp;void&nbsp;removeGraphVisitor(<a href="../../../../../org/apache/openjpa/lib/graph/GraphVisitor.html" title="interface in org.apache.openjpa.lib.graph">GraphVisitor</a>&nbsp;visitor)</pre>
<div class="block">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.</div>
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