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Node.java

package gov.nasa.arc.ase.util.graph;

import java.io.PrintStream;
//#ifdef JDK11



//#else JDK11
import java.util.Iterator;
import java.util.List;
import java.util.LinkedList;
//#endif JDK11

public class Node {
  private Graph graph;
  private List outgoingEdges;
  private List incomingEdges;
  private Attributes attributes;

  public Node(Graph g)          { init(g, null); }  
  public Node(Graph g, Attributes a)    { init(g, a); }  
  public Node(Node n)           { init(n.graph, new Attributes(n.attributes));
    for(Iterator i = n.outgoingEdges.iterator(); i.hasNext(); ) {
      new Edge(this, (Edge)i.next());
    }
    for(Iterator i = n.incomingEdges.iterator(); i.hasNext(); ) {
      new Edge((Edge)i.next(), this);
    }
  }  
  synchronized void addIncomingEdge(Edge e) { incomingEdges.add(e); }  
  synchronized void addOutgoingEdge(Edge e) { outgoingEdges.add(e); }  
  public synchronized void forAllEdges(Visitor v) {
    for(Iterator i = new LinkedList(outgoingEdges).iterator(); i.hasNext(); )
      v.visitEdge((Edge)i.next());
  }  
  public Attributes getAttributes() { return attributes; }  
  public boolean getBooleanAttribute(String name) { return attributes.getBoolean(name); }  
  public Graph getGraph() { return graph; }  
  public synchronized int getId() { return attributes.getInt("_id"); }  
  public int getIncomingEdgeCount() { return outgoingEdges.size(); }  
  public List getIncomingEdges() { return new LinkedList(incomingEdges); }  
  public int getIntAttribute(String name) { return attributes.getInt(name); }  
  public int getOutgoingEdgeCount() { return outgoingEdges.size(); }  
  public List getOutgoingEdges() { return new LinkedList(outgoingEdges); }  
  public String getStringAttribute(String name) { return attributes.getString(name); }  
  private void init(Graph g, Attributes a) {
    graph = g;
    if(a == null)
      attributes = new Attributes();
    else
      attributes = a;

    incomingEdges = new LinkedList();
    outgoingEdges = new LinkedList();

    graph.addNode(this);
  }  
  synchronized public void remove() {
    for(Iterator i = new LinkedList(outgoingEdges).iterator(); i.hasNext(); ) {
      ((Edge)i.next()).remove();
    }
    for(Iterator i = new LinkedList(incomingEdges).iterator(); i.hasNext(); ) {
      ((Edge)i.next()).remove();
    }
    graph.removeNode(this);
  }  
  synchronized void removeIncomingEdge(Edge e) { incomingEdges.remove(e); }  
  synchronized void removeOutgoingEdge(Edge e) { outgoingEdges.remove(e); }  
  void save(PrintStream out, int format) {
    switch(format) {
      case Graph.SM_FORMAT: save_sm(out); break;
      case Graph.FSP_FORMAT: save_fsp(out); break;
    }
  }  
  // Modified by ckong - Sept 7, 2001
  private void save_fsp(PrintStream out) {
    ///System.out.print("S" + getId() + "=(");
    out.print("S" + getId() + "=(");
    for(Iterator i = outgoingEdges.iterator(); i.hasNext(); ) {
      ((Edge)i.next()).save(out, Graph.FSP_FORMAT);
      if(i.hasNext())
    //System.out.print(" |");
    out.print(" |");
    }

    //System.out.print(")");
    out.print(")");
  }  
  private void save_sm(PrintStream out) {
    int id = getId();
    out.print("  "); out.println(outgoingEdges.size());
    attributes.unset("_id");
    out.print("  "); out.println(attributes);
    setId(id);
    for(Iterator i = outgoingEdges.iterator(); i.hasNext(); )
      ((Edge)i.next()).save(out, Graph.SM_FORMAT);
  }  
  synchronized public void setAttributes(Attributes a) { 
    int id = getId();
    attributes = new Attributes(a);
    setId(id);
  }  
  synchronized public void setBooleanAttribute(String name, boolean value) {
    if(name.equals("_id")) return;
    attributes.setBoolean(name, value);
  }  
  synchronized void setId(int id) {
    attributes.setInt("_id", id);
  }  
  synchronized public void setIntAttribute(String name, int value) {
    if(name.equals("_id")) return;
    attributes.setInt(name, value);
  }  
  synchronized public void setStringAttribute(String name, String value) {
    if(name.equals("_id")) return;
    attributes.setString(name, value);
  }  
}

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