code: package gr.uom.java.ast.association;
  
  import gr.uom.java.ast.FieldObject;
  
  public class Association {
  
      private String from;
      private String to;
      private boolean container;
      private FieldObject fieldObject;
  
      public Association(FieldObject fieldObject, String from, String to) {
          this.fieldObject = fieldObject;
      	this.from = from;
          this.to = to;
          this.container = false;
      }
      
      public FieldObject getFieldObject() {
      	return fieldObject;
      }
      
      public String getTo() {
          return to;
      }
  
      public String getFrom() {
          return from;
      }
  
      public boolean isContainer() {
          return container;
      }
  
      public void setContainer(boolean container) {
          this.container = container;
      }
  
      public boolean equals(Object o) {
          if(this == o) {
              return true;
          }
  
          if (o instanceof Association) {
              Association association = (Association)o;
              return this.from.equals(association.from) && this.to.equals(association.to) &&
              	this.fieldObject.equals(association.fieldObject) && this.container == association.container;
          }
          return false;
      }
  
      public String toString() {
          StringBuilder sb = new StringBuilder();
          sb.append(from).append(" -->");
          if(container)
              sb.append("(*) ");
          else
              sb.append("(1) ");
          sb.append(to);
          return sb.toString();
      }
  }
  