Coverage Report - com.sun.javafx.runtime.location.IndirectObjectExpression
 
Classes in this File Line Coverage Branch Coverage Complexity
IndirectObjectExpression
86%
6/7
N/A
0
IndirectObjectExpression$1
100%
2/2
N/A
0
 
 1  
 /*
 2  
  * Copyright 2008 Sun Microsystems, Inc.  All Rights Reserved.
 3  
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  
  *
 5  
  * This code is free software; you can redistribute it and/or modify it
 6  
  * under the terms of the GNU General Public License version 2 only, as
 7  
  * published by the Free Software Foundation.  Sun designates this
 8  
  * particular file as subject to the "Classpath" exception as provided
 9  
  * by Sun in the LICENSE file that accompanied this code.
 10  
  *
 11  
  * This code is distributed in the hope that it will be useful, but WITHOUT
 12  
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 13  
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 14  
  * version 2 for more details (a copy is included in the LICENSE file that
 15  
  * accompanied this code).
 16  
  *
 17  
  * You should have received a copy of the GNU General Public License version
 18  
  * 2 along with this work; if not, write to the Free Software Foundation,
 19  
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 20  
  *
 21  
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 22  
  * CA 95054 USA or visit www.sun.com if you need additional information or
 23  
  * have any questions.
 24  
  */
 25  
 
 26  
 package com.sun.javafx.runtime.location;
 27  
 
 28  
 /**
 29  
  * Indirect locations are used to express bindings that respond nonuniformly with respect to dependencies. For example,
 30  
  * bind a.b will change when a changes or when a.b changes, but the response to changes is different. If a.b changes but
 31  
  * a doesn't, the response is simply to update the value; if a changes, the response also includes updating the
 32  
  * dependency set as well, removing the old a.b and adding the new one.
 33  
  *
 34  
  * Indirect location instances are created with a set of static dependencies; in the example above, a would be a static
 35  
  * dependency.  Instances override computeLocation(), which returns a Location with its secondary dependencies set up;
 36  
  * in the example above, calling computeLocation() would evaluate a, and return a location corresponding to a.b.
 37  
  *
 38  
  * @author Brian Goetz
 39  
  */
 40  94
 public abstract class IndirectObjectExpression<T> extends ObjectVariable<T> implements IndirectLocation<ObjectLocation<T>> {
 41  
 
 42  
     protected final IndirectLocationHelper<ObjectLocation<T>> helper;
 43  
 
 44  
     public IndirectObjectExpression(boolean lazy, Location... dependencies) {
 45  64
         super();
 46  64
         helper = new IndirectLocationHelper<ObjectLocation<T>>(this, dependencies);
 47  64
         bind(lazy, new ObjectBindingExpression<T>() {
 48  
             public T computeValue() {
 49  107
                 return helper.get().get();
 50  
             }
 51  
         });
 52  64
     }
 53  
 
 54  
     public final ObjectLocation<T> computeLocationInternal() {
 55  94
         return computeLocation();
 56  
     }
 57  
 
 58  
     protected abstract ObjectLocation<T> computeLocation();
 59  
 
 60  
     public ObjectLocation<T>getUnderlyingLocation() {
 61  0
         return computeLocation();
 62  
     }
 63  
 }