case-study/jdt-before/core refactoring/org/eclipse/jdt/internal/corext/refactoring/typeconstraints/ConstraintVariable.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2011 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.jdt.internal.corext.refactoring.typeconstraints;
  12
  13 import org.eclipse.jdt.core.dom.ITypeBinding;
  14
  15 import org.eclipse.jdt.internal.corext.dom.Bindings;
  16 import org.eclipse.jdt.internal.corext.dom.TypeRules;
  17
  18 public abstract class ConstraintVariable {
  19         /**
  20          * The type binding, or <code>null</code>.
  21          */
  22         private final ITypeBinding fTypeBinding;
  23
  24         /**
  25          * @param binding the type binding, or <code>null</code>
  26          */
  27         protected ConstraintVariable(ITypeBinding binding) {
  28                 fTypeBinding= binding;
  29         }
  30
  31         public boolean canBeAssignedTo(ConstraintVariable targetVariable) {
  32                 if (fTypeBinding == null || targetVariable.fTypeBinding == null)
  33                         return false;
  34                 return TypeRules.canAssign(fTypeBinding, targetVariable.fTypeBinding);
  35         }
  36
  37         public String toResolvedString() {
  38                 if (fTypeBinding == null)
  39                         return "<NULL BINDING>"; //$NON-NLS-1$
  40                 return Bindings.asString(fTypeBinding);
  41         }
  42
  43         /* (non-Javadoc)
  44          * @see java.lang.Object#toString()
  45          */
  46         @Override
  47         public String toString() {
  48                 return toResolvedString();
  49         }
  50
  51         /**
  52          * @return the type binding or <code>null</code>
  53          */
  54         //TODO: rename to getTypeBinding()
  55         public ITypeBinding getBinding() {
  56                 return fTypeBinding;
  57         }
  58
  59         /**
  60          * For storing additional information associated with constraint variables.
  61          * Added in anticipation of the generics-related refactorings.
  62          */
  63         private Object fData;
  64
  65         public Object getData(){
  66                 return fData;
  67         }
  68
  69         public void setData(Object data){
  70                 fData= data;
  71         }
  72 }