content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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.typeconstraints2;
  
  import org.eclipse.core.runtime.Assert;
  import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
  import org.eclipse.wst.jsdt.core.dom.IFunctionBinding;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.typeconstraints.types.TType;
  
  /**
   * A ParameterTypeVariable is a ConstraintVariable which stands for
   * the type of a method parameter.
   */
  public final class ParameterTypeVariable2 extends ConstraintVariable2 implements ISourceConstraintVariable {
  
  	private final int fParameterIndex;
  	private final String fKey;
  	private IJavaScriptUnit fCompilationUnit;
  	
  	public ParameterTypeVariable2(TType type, int index, IFunctionBinding binding) {
  		super(type);
  		Assert.isNotNull(binding);
  		Assert.isTrue(0 <= index);
  		fParameterIndex= index;
  		fKey= binding.getKey();
  	}
  	
  	public void setCompilationUnit(IJavaScriptUnit cu) {
  		fCompilationUnit= cu;
  	}
  	
  	public IJavaScriptUnit getCompilationUnit() {
  		return fCompilationUnit;
  	}
  
  	public int getParameterIndex() {
  		return fParameterIndex;
  	}
  	
  	public String getKey() {
  		return fKey;
  	}
  
  	/*
  	 * @see java.lang.Object#hashCode()
  	 */
  	public int hashCode() {
  		return getParameterIndex() ^ getKey().hashCode();
  	}
  
  	/*
  	 * @see java.lang.Object#equals(java.lang.Object)
  	 */
  	public boolean equals(Object other) {
  		if (this == other)
  			return true;
  		if (other.getClass() != ParameterTypeVariable2.class)
  			return false;
  		
  		ParameterTypeVariable2 other2= (ParameterTypeVariable2) other;
  		return getParameterIndex() == other2.getParameterIndex()
  				&& getKey().equals(other2.getKey());
  	}
  
  	public String toString() {
  		String toString= (String) getData(TO_STRING);
  		return toString == null ? "[Parameter(" + fParameterIndex + "," + fKey + ")]" : toString; //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
  	}
  }
  