Coverage Report - com.sun.javafx.runtime.location.IndirectSequenceExpression
 
Classes in this File Line Coverage Branch Coverage Complexity
IndirectSequenceExpression
86%
6/7
N/A
0
IndirectSequenceExpression$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  
 import com.sun.javafx.runtime.sequence.Sequence;
 29  
 
 30  
 /**
 31  
  * Indirect locations are used to express bindings that respond nonuniformly with respect to dependencies. For example,
 32  
  * 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
 33  
  * a doesn't, the response is simply to update the value; if a changes, the response also includes updating the
 34  
  * dependency set as well, removing the old a.b and adding the new one.
 35  
  *
 36  
  * Indirect location instances are created with a set of static dependencies; in the example above, a would be a static
 37  
  * dependency.  Instances override computeLocation(), which returns a Location with its secondary dependencies set up;
 38  
  * in the example above, calling computeLocation() would evaluate a, and return a location corresponding to a.b.
 39  
  *
 40  
  * @author Brian Goetz
 41  
  */
 42  919
 public abstract class IndirectSequenceExpression<T> extends SequenceVariable<T> implements IndirectLocation<SequenceLocation<T>> {
 43  
 
 44  
     protected final IndirectLocationHelper<SequenceLocation<T>> helper;
 45  
 
 46  
     public IndirectSequenceExpression(Class<T> clazz, boolean lazy, Location... dependencies) {
 47  404
         super(clazz);
 48  404
         helper = new IndirectLocationHelper<SequenceLocation<T>>(this, dependencies);
 49  404
         bind(lazy, new SequenceBindingExpression<T>() {
 50  
             public Sequence<? extends T> computeValue() {
 51  920
                 return helper.get().getAsSequence();
 52  
             }
 53  
         });
 54  404
     }
 55  
 
 56  
     public final SequenceLocation<T> computeLocationInternal() {
 57  919
         return computeLocation();
 58  
     }
 59  
 
 60  
     protected abstract SequenceLocation<T> computeLocation();
 61  
 
 62  
     public SequenceLocation<T> getUnderlyingLocation() {
 63  0
         return computeLocation();
 64  
     }
 65  
 }