Populate xpath/ hierarchy

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

diff --git a/xpath/yang-xpath-api/src/main/java/org/opendaylight/yangtools/yang/xpath/api/DoubleXPathMathSupport.java b/xpath/yang-xpath-api/src/main/java/org/opendaylight/yangtools/yang/xpath/api/DoubleXPathMathSupport.java
new file mode 100644 (file)
index 0000000..4662b72
--- /dev/null
+++ b/xpath/yang-xpath-api/src/main/java/org/opendaylight/yangtools/yang/xpath/api/DoubleXPathMathSupport.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2019 Pantheon Technologies, s.r.o.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.yangtools.yang.xpath.api;
+
+final class DoubleXPathMathSupport extends AbstractYangXPathMathSupport<DoubleNumberExpr> {
+    static final DoubleXPathMathSupport INSTANCE = new DoubleXPathMathSupport();
+
+    private static final long serialVersionUID = 1L;
+
+    private DoubleXPathMathSupport() {
+        super(DoubleNumberExpr.class);
+    }
+
+    @Override
+    public DoubleNumberExpr createNumber(final String str) {
+        return DoubleNumberExpr.of(Double.parseDouble(str));
+    }
+
+    @Override
+    public DoubleNumberExpr createNumber(final int value) {
+        return DoubleNumberExpr.of(value);
+    }
+
+    @Override
+    protected DoubleNumberExpr doNegateNumber(final DoubleNumberExpr number) {
+        return DoubleNumberExpr.of(-number.getValue());
+    }
+
+    @Override
+    protected YangExpr doEvaluate(final YangBinaryOperator operator, final DoubleNumberExpr left,
+            final DoubleNumberExpr right) {
+        final double l = left.getValue();
+        final double r = right.getValue();
+
+        final double result;
+        switch (operator) {
+            case DIV:
+                result = l / r;
+                break;
+            case EQUALS:
+                return YangBooleanConstantExpr.of(left.equals(right));
+            case GT:
+                return YangBooleanConstantExpr.of(l > r);
+            case GTE:
+                return YangBooleanConstantExpr.of(l >= r);
+            case LT:
+                return YangBooleanConstantExpr.of(l < r);
+            case LTE:
+                return YangBooleanConstantExpr.of(l <= r);
+            case MINUS:
+                result = l - r;
+                break;
+            case MOD:
+                result = l % r;
+                break;
+            case MUL:
+                result = l * r;
+                break;
+            case NOT_EQUALS:
+                return YangBooleanConstantExpr.of(!left.equals(right));
+            case PLUS:
+                result = l + r;
+                break;
+            default:
+                throw new IllegalStateException("Unhandled operator " + operator);
+        }
+
+        return DoubleNumberExpr.of(result);
+    }
+
+    @Override
+    protected Object readResolve() {
+        return INSTANCE;
+    }
+}