content: /*******************************************************************************
   * Copyright (c) 2000, 2009 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.types;
  
  import org.eclipse.core.runtime.Assert;
  import org.eclipse.wst.jsdt.core.dom.ITypeBinding;
  
  
  public abstract class WildcardType extends TType {
  	protected TType fBound;
  	
  	protected WildcardType(TypeEnvironment environment) {
  		super(environment);
  	}
  
  	protected void initialize(ITypeBinding binding) {
  		Assert.isTrue(false);
  		super.initialize(binding);
  	}
  	
  	public TType getBound() {
  		return fBound;
  	}
  	
  	public TType[] getSubTypes() {
  		throw new UnsupportedOperationException();
  	}
  	
  	public boolean doEquals(TType type) {
  		WildcardType other= (WildcardType)type;
  		if (fBound == null)
  			return other.fBound == null;
  		return fBound.equals(other.fBound);
  	}
  	
  	public int hashCode() {
  		if (fBound == null)
  			return super.hashCode();
  		return fBound.hashCode() << WILDCARD_TYPE_SHIFT;
  	}
  	
  	protected abstract boolean checkAssignmentBound(TType rhs);
  	
  	// protected abstract boolean checkTypeArgumentBound(TType rhs);
  	
  	protected String internalGetName(String keyword) {
  		StringBuffer result= new StringBuffer("?"); //$NON-NLS-1$
  		TType bound= getBound();
  		if (bound != null) {
  			result.append(" "); //$NON-NLS-1$
  			result.append(keyword);
  			result.append(" "); //$NON-NLS-1$
  			result.append(bound.getName());
  		}
  		return result.toString();
  	}
  	
  	protected String internalGetPrettySignature(String keyword) {
  		StringBuffer result= new StringBuffer("?"); //$NON-NLS-1$
  		TType bound= getBound();
  		if (bound != null) {
  			result.append(" "); //$NON-NLS-1$
  			result.append(keyword);
  			result.append(" "); //$NON-NLS-1$
  			result.append(bound.getPlainPrettySignature());
  		}
  		return result.toString();
  	}	
  }
  