content: /**
   * Copyright (c) 2019-2020, the Alpha Team.
   * 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.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS 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 COPYRIGHT HOLDER OR 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.
   */
  package at.ac.tuwien.kr.alpha.app;
  
  import java.io.OutputStream;
  import java.io.PrintStream;
  import java.util.List;
  import java.util.Map.Entry;
  
  import at.ac.tuwien.kr.alpha.api.programs.analysis.ComponentGraph;
  import at.ac.tuwien.kr.alpha.api.programs.analysis.DependencyGraph;
  
  public class ComponentGraphWriter {
  
  	private static final String GRAPH_HEADING = "digraph componentGraph";
  
  	private static final String NODE_FMT = "n%d [label = C%d]%n";
  	private static final String EDGE_FMT = "n%d -> n%d [xlabel=\"%s\" labeldistance=0.1]%n";
  
  	public void writeAsDot(ComponentGraph graph, OutputStream out) {
  		PrintStream ps = new PrintStream(out);
  		startGraph(ps);
  		writeComponentsTable(ps, graph);
  		ps.println();
  		writeGraph(ps, graph);
  		finishGraph(ps);
  		ps.close();
  	}
  
  	private void startGraph(PrintStream ps) {
  		ps.println(ComponentGraphWriter.GRAPH_HEADING);
  		ps.println("{");
  		ps.println("splines=false;");
  		ps.println("ranksep=4.0;");
  	}
  
  	private void writeComponentsTable(PrintStream ps, ComponentGraph cg) {
  		ps.println("label = <");
  		ps.println("\t<table border = '1' cellborder = '0'>");
  		StringBuilder headerBuilder = new StringBuilder("<tr>");
  		headerBuilder.append("<td>Component Id</td>");
  		for (int i = 0; i < cg.getComponents().size(); i++) {
  			headerBuilder.append("<td>").append(i).append("</td>");
  		}
  		headerBuilder.append("</tr>");
  		ps.println("\t\t" + headerBuilder.toString());
  		StringBuilder contentBuilder = new StringBuilder("<tr>");
  		contentBuilder.append("<td>Predicates</td>");
  		for (int i = 0; i < cg.getComponents().size(); i++) {
  			contentBuilder.append("<td>");
  			for (DependencyGraph.Node n : cg.getComponents().get(i).getNodes()) {
  				contentBuilder.append(n.getLabel()).append("<br/>");
  			}
  			contentBuilder.append("</td>");
  		}
  		contentBuilder.append("</tr>");
  		ps.println("\t\t" + contentBuilder.toString());
  		ps.println("\t</table>");
  		ps.println(">");
  	}
  
  	private void writeGraph(PrintStream ps, ComponentGraph cg) {
  		List<ComponentGraph.SCComponent> components = cg.getComponents();
  		// Write the node descriptors for the components.
  		for (int componentId = 0; componentId < components.size(); componentId++) {
  			ps.printf(NODE_FMT, componentId, componentId);
  			for (Entry<Integer, Boolean> dependency : components.get(componentId).getDependencyIds().entrySet()) {
  				ps.printf(EDGE_FMT, dependency.getKey(), componentId, dependency.getValue().equals(true) ? "+" : "-");
  			}
  		}
  	}
  
  	private void finishGraph(PrintStream ps) {
  		ps.println("}");
  	}
  
  }
  