xpath/yang-xpath-api/src/main/java/org/opendaylight/yangtools/yang/xpath/api/DoubleXPathMathSupport.java

   1 /*
   2  * Copyright (c) 2019 Pantheon Technologies, s.r.o.  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.xpath.api;
   9
  10 final class DoubleXPathMathSupport extends AbstractYangXPathMathSupport<DoubleNumberExpr> {
  11     static final DoubleXPathMathSupport INSTANCE = new DoubleXPathMathSupport();
  12
  13     private static final long serialVersionUID = 1L;
  14
  15     private DoubleXPathMathSupport() {
  16         super(DoubleNumberExpr.class);
  17     }
  18
  19     @Override
  20     public DoubleNumberExpr createNumber(final String str) {
  21         return DoubleNumberExpr.of(Double.parseDouble(str));
  22     }
  23
  24     @Override
  25     public DoubleNumberExpr createNumber(final int value) {
  26         return DoubleNumberExpr.of(value);
  27     }
  28
  29     @Override
  30     protected DoubleNumberExpr doNegateNumber(final DoubleNumberExpr number) {
  31         return DoubleNumberExpr.of(-number.getValue());
  32     }
  33
  34     @Override
  35     protected YangExpr doEvaluate(final YangBinaryOperator operator, final DoubleNumberExpr left,
  36             final DoubleNumberExpr right) {
  37         final double l = left.getValue();
  38         final double r = right.getValue();
  39
  40         final double result;
  41         switch (operator) {
  42             case DIV:
  43                 result = l / r;
  44                 break;
  45             case EQUALS:
  46                 return YangBooleanConstantExpr.of(left.equals(right));
  47             case GT:
  48                 return YangBooleanConstantExpr.of(l > r);
  49             case GTE:
  50                 return YangBooleanConstantExpr.of(l >= r);
  51             case LT:
  52                 return YangBooleanConstantExpr.of(l < r);
  53             case LTE:
  54                 return YangBooleanConstantExpr.of(l <= r);
  55             case MINUS:
  56                 result = l - r;
  57                 break;
  58             case MOD:
  59                 result = l % r;
  60                 break;
  61             case MUL:
  62                 result = l * r;
  63                 break;
  64             case NOT_EQUALS:
  65                 return YangBooleanConstantExpr.of(!left.equals(right));
  66             case PLUS:
  67                 result = l + r;
  68                 break;
  69             default:
  70                 throw new IllegalStateException("Unhandled operator " + operator);
  71         }
  72
  73         return DoubleNumberExpr.of(result);
  74     }
  75
  76     @Override
  77     protected Object readResolve() {
  78         return INSTANCE;
  79     }
  80 }