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<div class="subTitle">org.jgrapht.alg</div>
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<h2 title="Class KosarajuStrongConnectivityInspector" class="title">Class KosarajuStrongConnectivityInspector<V,E></h2>
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<li>org.jgrapht.alg.KosarajuStrongConnectivityInspector<V,E></li>
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<dt>All Implemented Interfaces:</dt>
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<dd><a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html" title="interface in org.jgrapht.alg.interfaces">StrongConnectivityAlgorithm</a><V,E></dd>
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<br>
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<pre>public class <span class="strong">KosarajuStrongConnectivityInspector<V,E></span>
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extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
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implements <a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html" title="interface in org.jgrapht.alg.interfaces">StrongConnectivityAlgorithm</a><V,E></pre>
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<div class="block"><p>Complements the <a href="../../../org/jgrapht/alg/ConnectivityInspector.html" title="class in org.jgrapht.alg"><code>ConnectivityInspector</code></a> class with
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the capability to compute the strongly connected components of a directed
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graph. The algorithm is implemented after "Cormen et al: Introduction to
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agorithms", Chapter 22.5. It has a running time of O(V + E).</p>
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<p>Unlike <a href="../../../org/jgrapht/alg/ConnectivityInspector.html" title="class in org.jgrapht.alg"><code>ConnectivityInspector</code></a>, this class does not
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implement incremental inspection. The full algorithm is executed at the first
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call of <a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html#stronglyConnectedSets()"><code>stronglyConnectedSets()</code></a>
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or <a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html#isStronglyConnected()"><code>isStronglyConnected()</code></a>.</p></div>
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<dl><dt><span class="strong">Since:</span></dt>
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<dd>Feb 2, 2005</dd>
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<dt><span class="strong">Author:</span></dt>
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<dd>Christian Soltenborn, Christian Hammer</dd></dl>
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
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<td class="colOne"><code><strong><a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html#KosarajuStrongConnectivityInspector(org.jgrapht.DirectedGraph)">KosarajuStrongConnectivityInspector</a></strong>(<a href="../../../org/jgrapht/DirectedGraph.html" title="interface in org.jgrapht">DirectedGraph</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>> directedGraph)</code>
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<div class="block">The constructor of the StrongConnectivityAlgorithm class.</div>
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code><a href="../../../org/jgrapht/DirectedGraph.html" title="interface in org.jgrapht">DirectedGraph</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>></code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html#getGraph()">getGraph</a></strong>()</code>
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<div class="block">Returns the graph inspected by the StrongConnectivityAlgorithm.</div>
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</td>
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<td class="colFirst"><code>boolean</code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html#isStronglyConnected()">isStronglyConnected</a></strong>()</code>
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<div class="block">Returns true if the graph of this <code>
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StronglyConnectivityInspector</code> instance is strongly connected.</div>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>>></code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html#stronglyConnectedSets()">stronglyConnectedSets</a></strong>()</code>
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<div class="block">Computes a <a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util"><code>List</code></a> of <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util"><code>Set</code></a>s, where each set contains vertices
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which together form a strongly connected component within the given
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graph.</div>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../org/jgrapht/graph/DirectedSubgraph.html" title="class in org.jgrapht.graph">DirectedSubgraph</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>>></code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html#stronglyConnectedSubgraphs()">stronglyConnectedSubgraphs</a></strong>()</code>
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<div class="block">Computes a list of <a href="../../../org/jgrapht/graph/DirectedSubgraph.html" title="class in org.jgrapht.graph"><code>DirectedSubgraph</code></a>s of the given graph.</div>
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<h3>Constructor Detail</h3>
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<a name="KosarajuStrongConnectivityInspector(org.jgrapht.DirectedGraph)">
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<h4>KosarajuStrongConnectivityInspector</h4>
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<pre>public KosarajuStrongConnectivityInspector(<a href="../../../org/jgrapht/DirectedGraph.html" title="interface in org.jgrapht">DirectedGraph</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>> directedGraph)</pre>
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<div class="block">The constructor of the StrongConnectivityAlgorithm class.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>directedGraph</code> - the graph to inspect</dd>
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<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code></dd></dl>
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<a name="getGraph()">
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<h4>getGraph</h4>
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<pre>public <a href="../../../org/jgrapht/DirectedGraph.html" title="interface in org.jgrapht">DirectedGraph</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>> getGraph()</pre>
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<div class="block">Returns the graph inspected by the StrongConnectivityAlgorithm.</div>
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<dl>
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<dt><strong>Specified by:</strong></dt>
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<dd><code><a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html#getGraph()">getGraph</a></code> in interface <code><a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html" title="interface in org.jgrapht.alg.interfaces">StrongConnectivityAlgorithm</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>></code></dd>
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<dt><span class="strong">Returns:</span></dt><dd>the graph inspected by this StrongConnectivityAlgorithm</dd></dl>
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<a name="isStronglyConnected()">
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<h4>isStronglyConnected</h4>
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<pre>public boolean isStronglyConnected()</pre>
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<div class="block">Returns true if the graph of this <code>
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StronglyConnectivityInspector</code> instance is strongly connected.</div>
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<dl>
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<dt><strong>Specified by:</strong></dt>
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<dd><code><a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html#isStronglyConnected()">isStronglyConnected</a></code> in interface <code><a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html" title="interface in org.jgrapht.alg.interfaces">StrongConnectivityAlgorithm</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>></code></dd>
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<dt><span class="strong">Returns:</span></dt><dd>true if the graph is strongly connected, false otherwise</dd></dl>
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<a name="stronglyConnectedSets()">
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<h4>stronglyConnectedSets</h4>
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<pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>>> stronglyConnectedSets()</pre>
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<div class="block">Computes a <a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util"><code>List</code></a> of <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util"><code>Set</code></a>s, where each set contains vertices
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which together form a strongly connected component within the given
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graph.</div>
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<dl>
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<dt><strong>Specified by:</strong></dt>
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<dd><code><a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html#stronglyConnectedSets()">stronglyConnectedSets</a></code> in interface <code><a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html" title="interface in org.jgrapht.alg.interfaces">StrongConnectivityAlgorithm</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>></code></dd>
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<dt><span class="strong">Returns:</span></dt><dd><code>List</code> of <code>Set</code> s containing the strongly
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connected components</dd></dl>
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</li>
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</ul>
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<a name="stronglyConnectedSubgraphs()">
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<!-- -->
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</a>
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<ul class="blockListLast">
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<li class="blockList">
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<h4>stronglyConnectedSubgraphs</h4>
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<pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../org/jgrapht/graph/DirectedSubgraph.html" title="class in org.jgrapht.graph">DirectedSubgraph</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>>> stronglyConnectedSubgraphs()</pre>
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<div class="block"><p>Computes a list of <a href="../../../org/jgrapht/graph/DirectedSubgraph.html" title="class in org.jgrapht.graph"><code>DirectedSubgraph</code></a>s of the given graph. Each
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subgraph will represent a strongly connected component and will contain
|
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all vertices of that component. The subgraph will have an edge (u,v) iff
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u and v are contained in the strongly connected component.</p>
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<p>NOTE: Calling this method will first execute <a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html#stronglyConnectedSets()"><code>stronglyConnectedSets()</code></a>. If you
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don't need subgraphs, use that method.</p></div>
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<dl>
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||
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<dt><strong>Specified by:</strong></dt>
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<dd><code><a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html#stronglyConnectedSubgraphs()">stronglyConnectedSubgraphs</a></code> in interface <code><a href="../../../org/jgrapht/alg/interfaces/StrongConnectivityAlgorithm.html" title="interface in org.jgrapht.alg.interfaces">StrongConnectivityAlgorithm</a><<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">V</a>,<a href="../../../org/jgrapht/alg/KosarajuStrongConnectivityInspector.html" title="type parameter in KosarajuStrongConnectivityInspector">E</a>></code></dd>
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<dt><span class="strong">Returns:</span></dt><dd>a list of subgraphs representing the strongly connected
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components</dd></dl>
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</li>
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</ul>
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