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
  43     private static final UnresolvedNumber MIN = new UnresolvedNumber() {
  44         private static final long serialVersionUID = 1L;
  45
  46         @Override
  47         public Number resolveLength(final List<LengthConstraint> constraints) {
  48             return resolve(constraints.get(0).getMin());
  49         }
  50
  51         @Override
  52         public Number resolveRange(final List<RangeConstraint> constraints) {
  53             return resolve(constraints.get(0).getMin());
  54         }
  55
  56         @Override
  57         public String toString() {
  58             return "min";
  59         }
  60
  61         private Object readResolve() {
  62             return MIN;
  63         }
  64     };
  65
  66     public static UnresolvedNumber min() {
  67         return MIN;
  68     }
  69
  70     public static UnresolvedNumber max() {
  71         return MAX;
  72     }
  73
  74     @Override
  75     public final int intValue() {
  76         throw new UnsupportedOperationException();
  77     }
  78
  79     @Override
  80     public final long longValue() {
  81         throw new UnsupportedOperationException();
  82     }
  83
  84     @Override
  85     public final float floatValue() {
  86         throw new UnsupportedOperationException();
  87     }
  88
  89     @Override
  90     public final double doubleValue() {
  91         throw new UnsupportedOperationException();
  92     }
  93
  94     private static Number resolve(final Number number) {
  95         Preconditions.checkArgument(!(number instanceof UnresolvedNumber));
  96         return number;
  97     }
  98
  99     public abstract Number resolveLength(List<LengthConstraint> constraints);
 100
 101     public abstract Number resolveRange(List<RangeConstraint> constraints);
 102
 103     @Override
 104     public abstract String toString();
 105 }