package org.daisy.pipeline.css.impl;
   
   import cz.vutbr.web.css.Term;
   
   public abstract class UnmodifiableTerm<T> implements Term<T> {
   
   	@Override
   	public T getValue() {
   		throw new UnsupportedOperationException("not implemented");
  	}
  
  	@Override
  	public Operator getOperator() {
  		return null;
  	}
  
  	@SuppressWarnings("unchecked")
  	@Override
  	public UnmodifiableTerm<T> shallowClone() {
  		try {
  			return (UnmodifiableTerm<T>)super.clone();
  		} catch (CloneNotSupportedException e) {
  			throw new InternalError("coding error");
  		}
  	}
  
  	@Override
  	public UnmodifiableTerm<T> clone() {
  		return shallowClone();
  	}
  
  	@Override
  	public UnmodifiableTerm<T> setValue(T value) {
  		throw new UnsupportedOperationException("Unmodifiable");
  	}
  
  	@Override
  	public UnmodifiableTerm<T> setOperator(Operator operator) {
  		throw new UnsupportedOperationException("Unmodifiable");
  	}
  }