package ixa.kaflib;
   
   import java.io.Serializable;
   import java.util.List;
   
   public class Terminal extends TreeNode implements Serializable {
   
       /** The term referenced by this terminal */
       private Span<Term> span;
  
      Terminal(String id, Span<Term> span) {
  	super(id, false, true);
  	this.span = span;
      }
  
      /** Returns the Span object */
      public Span<Term> getSpan() {
  	return this.span;
      }
  
      private String getStrValue() {
  	String str = "";
  	for (Term term : span.getTargets()) {
  	    if (!str.isEmpty()) {
  		str += " ";
  	    }
  	    str += term.getStr();
  	}
  	return str;
      }
  
      public String getStr() {
  	String strValue = this.getStrValue();
  	if (strValue.startsWith("-") || strValue.endsWith("-")) {
  	    return strValue.replace("-", "- ");
     	}
     	else if (strValue.contains("--")) { 
  	    return strValue.replace("--", "-");
     	}
     	else {
  	    return strValue;
     	}
      }
  
      public void addChild(TreeNode tn) throws Exception {
  	throw new Exception("It is not possible to add child nodes to Terminal nodes.");
      }
  
      public List<TreeNode> getChildren() {
  	return null;
      }
  
  }