nodeimpl.java

用JGraph编的软件

package org.jgpd.io.jbpm.definition.impl;

import java.util.*;

import org.jgpd.io.JGpdModelNode;
import org.jgpd.io.jbpm.definition.*;

public class NodeImpl
    extends DefinitionObjectImpl
    implements Node {

  public NodeImpl() {
    this.arrivingTransitions = new HashSet();
    this.leavingTransitions = new HashSet();
  }

  public String writeXML(String indent) {
    String xml = "";

    Iterator iter = leavingTransitions.iterator();
    while (iter.hasNext()) {
      TransitionImpl transition = (TransitionImpl) (iter.next());
      xml += transition.writeXML(indent);
    }

    return xml;
  }

  public void resetTransitions() {
    this.leavingTransitions = new HashSet();
  }

  public ProcessBlock getProcessBlock() {
    return this.processBlock;
  }

  public void setProcessBlock(ProcessBlock processBlock) {
    this.processBlock = processBlock;
  }

  public void addArrivingTransition(TransitionImpl trans) {
    if (this.arrivingTransitions.contains(trans)) {
      // FIXME TODO db, error condition. the collection should not
      // already have the transition
    }
    else {
      this.arrivingTransitions.add(trans);
    }
  }

  public Collection getLeavingTransitions() {
    return this.leavingTransitions;
  }

  public void setLeavingTransitions(Collection leavingTransitions) {
    this.leavingTransitions = leavingTransitions;
  }

  public void addLeavingTransition(TransitionImpl trans) {
    if (this.leavingTransitions.contains(trans)) {
      // FIXME TODO db, error condition. the collection should not
      // already have the transition
    }
    else {
      this.leavingTransitions.add(trans);
    }
  }

  /**
   * The contract to this function says the transition is connected
   * both ends ( sourceCell != null )
   */
  public void addSourcedTransition(JGpdModelNode sourceCell,
                                   String transitionName) {
    TransitionImpl trans = new TransitionImpl();
    addLeavingTransition(trans);
    trans.setFrom(this);
    trans.setTo( (NodeImpl) sourceCell);
    if (transitionName != null) {
      trans.setName(transitionName);
    }
  }

  public String toString() {
    return getName();
  }

  protected ProcessBlock processBlock = null;
  protected Collection arrivingTransitions = null;
  protected Collection leavingTransitions = null;
}