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 com.google.common.annotations.Beta;
  11 import com.google.common.base.Preconditions;
  12 import java.util.List;
  13 import org.opendaylight.yangtools.concepts.Immutable;
  14 import org.opendaylight.yangtools.yang.model.api.type.LengthConstraint;
  15 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
  16
  17 @Beta
  18 public abstract class UnresolvedNumber extends Number implements Immutable {
  19     private static final long serialVersionUID = 1L;
  20     private static final UnresolvedNumber MAX = new UnresolvedNumber() {
  21         private static final long serialVersionUID = 1L;
  22
  23         @Override
  24         public Number resolveLength(final List<LengthConstraint> constraints) {
  25             return resolve(constraints.get(constraints.size() - 1).getMax());
  26         }
  27
  28         @Override
  29         public Number resolveRange(final List<RangeConstraint> constraints) {
  30             return resolve(constraints.get(constraints.size() - 1).getMax());
  31         }
  32
  33         @Override
  34         public String toString() {
  35             return "max";
  36         }
  37
  38         private Object readResolve() {
  39             return MAX;
  40         }
  41     };
  42     private static final UnresolvedNumber MIN = new UnresolvedNumber() {
  43         private static final long serialVersionUID = 1L;
  44
  45         @Override
  46         public Number resolveLength(final List<LengthConstraint> constraints) {
  47             return resolve(constraints.get(0).getMin());
  48         }
  49
  50         @Override
  51         public Number resolveRange(final List<RangeConstraint> constraints) {
  52             return resolve(constraints.get(0).getMin());
  53         }
  54
  55         @Override
  56         public String toString() {
  57             return "min";
  58         }
  59
  60         private Object readResolve() {
  61             return MIN;
  62         }
  63     };
  64
  65     public static UnresolvedNumber min() {
  66         return MIN;
  67     }
  68
  69     public static UnresolvedNumber max() {
  70         return MAX;
  71     }
  72
  73     @Override
  74     public final int intValue() {
  75         throw new UnsupportedOperationException();
  76     }
  77
  78     @Override
  79     public final long longValue() {
  80         throw new UnsupportedOperationException();
  81     }
  82
  83     @Override
  84     public final float floatValue() {
  85         throw new UnsupportedOperationException();
  86     }
  87
  88     @Override
  89     public final double doubleValue() {
  90         throw new UnsupportedOperationException();
  91     }
  92
  93     private final static Number resolve(final Number number) {
  94         Preconditions.checkArgument(!(number instanceof UnresolvedNumber));
  95         return number;
  96     }
  97
  98     public abstract Number resolveLength(List<LengthConstraint> constraints);
  99     public abstract Number resolveRange(List<RangeConstraint> constraints);
 100
 101     @Override
 102     public abstract String toString();
 103 }