yang/yang-model-util/src/main/java/org/opendaylight/yangtools/yang/model/util/UnresolvedNumber.java

   1 /*
   2  * Copyright (c) 2015 Pantheon Technologies s.r.o. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.yangtools.yang.model.util;
   9
  10 import static com.google.common.base.Preconditions.checkArgument;
  11
  12 import com.google.common.annotations.Beta;
  13 import java.util.List;
  14 import org.opendaylight.yangtools.concepts.Immutable;
  15 import org.opendaylight.yangtools.yang.model.api.type.LengthConstraint;
  16 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
  17
  18 @Beta
  19 public abstract class UnresolvedNumber extends Number implements Immutable {
  20     private static final long serialVersionUID = 1L;
  21     private static final UnresolvedNumber MAX = new UnresolvedNumber() {
  22         private static final long serialVersionUID = 1L;
  23
  24         @Override
  25         public Number resolveLength(final List<LengthConstraint> constraints) {
  26             return resolve(constraints.get(constraints.size() - 1).getMax());
  27         }
  28
  29         @Override
  30         public Number resolveRange(final List<RangeConstraint> constraints) {
  31             return resolve(constraints.get(constraints.size() - 1).getMax());
  32         }
  33
  34         @Override
  35         public String toString() {
  36             return "max";
  37         }
  38
  39         private Object readResolve() {
  40             return MAX;
  41         }
  42     };
  43
  44     private static final UnresolvedNumber MIN = new UnresolvedNumber() {
  45         private static final long serialVersionUID = 1L;
  46
  47         @Override
  48         public Number resolveLength(final List<LengthConstraint> constraints) {
  49             return resolve(constraints.get(0).getMin());
  50         }
  51
  52         @Override
  53         public Number resolveRange(final List<RangeConstraint> constraints) {
  54             return resolve(constraints.get(0).getMin());
  55         }
  56
  57         @Override
  58         public String toString() {
  59             return "min";
  60         }
  61
  62         private Object readResolve() {
  63             return MIN;
  64         }
  65     };
  66
  67     public static UnresolvedNumber min() {
  68         return MIN;
  69     }
  70
  71     public static UnresolvedNumber max() {
  72         return MAX;
  73     }
  74
  75     @Override
  76     public final int intValue() {
  77         throw new UnsupportedOperationException();
  78     }
  79
  80     @Override
  81     public final long longValue() {
  82         throw new UnsupportedOperationException();
  83     }
  84
  85     @Override
  86     public final float floatValue() {
  87         throw new UnsupportedOperationException();
  88     }
  89
  90     @Override
  91     public final double doubleValue() {
  92         throw new UnsupportedOperationException();
  93     }
  94
  95     private static Number resolve(final Number number) {
  96         checkArgument(!(number instanceof UnresolvedNumber));
  97         return number;
  98     }
  99
 100     public abstract Number resolveLength(List<LengthConstraint> constraints);
 101
 102     public abstract Number resolveRange(List<RangeConstraint> constraints);
 103
 104     @Override
 105     public abstract String toString();
 106 }