Publish

1 files changed, 56 insertions, 0 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/binaryprefix/BinaryScaledAmount.java b/vespajlib/src/main/java/com/yahoo/binaryprefix/BinaryScaledAmount.java
new file mode 100644
index 00000000000..303674bb504
--- /dev/null
+++ b/vespajlib/src/main/java/com/yahoo/binaryprefix/BinaryScaledAmount.java
@@ -0,0 +1,56 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.binaryprefix;
+
+/**
+ * An amount scaled by a binary prefix.
+ *
+ * <p>
+ * Examples: 2 kilo, 2 mega, ...
+ * </p>
+ *
+ * @author tonytv
+ */
+public final class BinaryScaledAmount {
+    public final double amount;
+    public final BinaryPrefix binaryPrefix;
+
+    public BinaryScaledAmount(double amount, BinaryPrefix binaryPrefix) {
+        this.amount = amount;
+        this.binaryPrefix = binaryPrefix;
+    }
+
+    public BinaryScaledAmount() {
+        this(0, BinaryPrefix.unit);
+    }
+
+    public long as(BinaryPrefix newBinaryPrefix) {
+        return Math.round(newBinaryPrefix.convertFrom(amount, binaryPrefix));
+    }
+
+    public boolean equals(BinaryScaledAmount candidate) {
+        return BinaryPrefix.unit.convertFrom(amount, binaryPrefix) ==
+                BinaryPrefix.unit.convertFrom(candidate.amount, candidate.binaryPrefix);
+    }
+
+    public BinaryScaledAmount multiply(double d) {
+        return new BinaryScaledAmount(d*amount, binaryPrefix);
+    }
+
+    public BinaryScaledAmount divide(double d) {
+        return multiply(1/d);
+    }
+
+    @Override
+    public boolean equals(Object candidate) {
+        if (!(candidate instanceof BinaryScaledAmount)) {
+            return false;
+        } else {
+            return equals((BinaryScaledAmount)candidate);
+        }
+    }
+
+    @Override
+    public int hashCode() {
+        return (int)BinaryPrefix.unit.convertFrom(amount, binaryPrefix);
+    }
+}