yang/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     private static final DoubleXPathMathSupport INSTANCE = new DoubleXPathMathSupport();
  12
  13     private DoubleXPathMathSupport() {
  14         super(DoubleNumberExpr.class);
  15     }
  16
  17     static DoubleXPathMathSupport getInstance() {
  18         return INSTANCE;
  19     }
  20
  21     @Override
  22     public DoubleNumberExpr createNumber(final String str) {
  23         return DoubleNumberExpr.of(Double.parseDouble(str));
  24     }
  25
  26     @Override
  27     DoubleNumberExpr doNegate(final DoubleNumberExpr number) {
  28         return DoubleNumberExpr.of(-number.getValue());
  29     }
  30
  31     @Override
  32     YangExpr evaluate(final YangBinaryOperator operator, final DoubleNumberExpr left, final DoubleNumberExpr right) {
  33         final double l = left.getValue();
  34         final double r = right.getValue();
  35
  36         final double result;
  37         switch (operator) {
  38             case DIV:
  39                 result = l / r;
  40                 break;
  41             case EQUALS:
  42                 return YangBooleanConstantExpr.of(left.equals(right));
  43             case GT:
  44                 return YangBooleanConstantExpr.of(l > r);
  45             case GTE:
  46                 return YangBooleanConstantExpr.of(l >= r);
  47             case LT:
  48                 return YangBooleanConstantExpr.of(l < r);
  49             case LTE:
  50                 return YangBooleanConstantExpr.of(l <= r);
  51             case MINUS:
  52                 result = l - r;
  53                 break;
  54             case MOD:
  55                 result = l % r;
  56                 break;
  57             case MUL:
  58                 result = l * r;
  59                 break;
  60             case NOT_EQUALS:
  61                 return YangBooleanConstantExpr.of(!left.equals(right));
  62             case PLUS:
  63                 result = l + r;
  64                 break;
  65             default:
  66                 throw new IllegalStateException("Unhandled operator " + operator);
  67         }
  68
  69         return DoubleNumberExpr.of(result);
  70     }
  71 }