- start of a GraphML visualizer so that I can use royere to view

dependency graphs. git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/sandbox/graph/trunk@144581 13f79535-47bb-0310-9956-ffa450edef68
2001-11-29 21:12:40 +00:00
1 parent bf778b4dc0
commit 970acd984f
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+package org.apache.commons.graph.visualize;
+
+/* ====================================================================
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2001 The Apache Software Foundation.  All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ *    if any, must include the following acknowledgment:
+ *       "This product includes software developed by the
+ *        Apache Software Foundation (http://www.apache.org/)."
+ *    Alternately, this acknowledgment may appear in the software itself,
+ *    if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Apache" and "Apache Software Foundation" and
+ *    "Apache BCEL" must not be used to endorse or promote products
+ *    derived from this software without prior written permission. For
+ *    written permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache",
+ *    "Apache BCEL", nor may "Apache" appear in their name, without
+ *    prior written permission of the Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ */
+
+import java.io.OutputStream;
+
+import org.apache.commons.graph.Constants;
+import org.apache.commons.graph.DFS;
+import org.apache.commons.graph.Edge;
+import org.apache.commons.graph.Graph;
+import org.apache.commons.graph.Vertex;
+
+/**
+ * Visualizes graphs into the <A HREF="http://www.fmi.uni-passau.de/Graphlet/">GML</A>
+ * format.
+ *
+ * @version $Id: GraphMLVisualizer.java,v 1.1 2001/11/29 21:12:40 jvanzyl Exp $
+ * @author  <a href="mailto:jvanzyl@zenplex.com">Jason van Zyl</a>
+ */
+public class GraphMLVisualizer 
+    extends GraphVisualizer 
+{
+  private Graph graph;
+
+  /**
+   * @param out stream to print output to
+   * @param verbose toggle verbosity of output
+   */
+  public GraphMLVisualizer(OutputStream out, int verbose) {
+    super(out, verbose);
+  }
+
+  public void discoverGraph(Graph g) {
+    String d = g.isDirected()? "true" : "false";
+
+    graph = g;
+    
+    println(0, "<GraphXML>");
+    println(0, "<graph isDirected=\"" + d + "\" id=\"" + Vertex.getCounter() + "\">");
+  }
+
+  public void finishGraph(Graph g) 
+  {
+    println(0, "</graph>");
+    println(0, "</GraphXML>");
+    out.close();
+  }
+
+  public void discoverVertex(Vertex v) 
+  {
+    println(0, "<node name=\"" + v.getIdent() + "\"/>");
+  }
+
+  public void finishVertex(Vertex v) {}
+
+  public void discoverEdge(Edge e) 
+  {
+    int src    = graph.getSource(e).getIdent();
+    int target = graph.getTarget(e).getIdent();
+
+    println(0, "<edge source=\"" + src + "\" target=\"" + target + "\"/>");
+  }
+
+  public void finishEdge(Edge e) {}
+
+  /**
+   * Visualize graph g with this Visualizer.
+   *
+   * @param g graph to visualize
+   * @param start node to start at
+   */
+  public void visualize(Graph g, Vertex start) {
+    new DFS(this).start(g, start);
+  }
+}