refactor and require unit for distance

1 files changed, 57 insertions, 0 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/geo/ParsedDegree.java b/vespajlib/src/main/java/com/yahoo/geo/ParsedDegree.java
new file mode 100644
index 00000000000..0abcbd0c606
--- /dev/null
+++ b/vespajlib/src/main/java/com/yahoo/geo/ParsedDegree.java
@@ -0,0 +1,57 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+package com.yahoo.geo;
+
+/**
+ * utility for holding one geographical coordinate
+ *
+ * @author arnej27959
+ **/
+public class ParsedDegree {
+    /**
+     * the parsed latitude or longitude
+     * Degrees north or east if positive
+     * Degrees south or west if negative
+     **/
+    public final double degrees;
+
+    // one of these two flag will be true:
+    public final boolean isLatitude;
+    public final boolean isLongitude;
+
+    public ParsedDegree(double value, boolean isLat, boolean isLon) {
+        this.degrees = value;
+        this.isLatitude = isLat;
+        this.isLongitude = isLon;
+        if (isLat && isLon) {
+            throw new IllegalArgumentException("value cannot be both latitude and longitude at once");
+        }
+        if (isLat || isLon) {
+            return;
+        }
+        throw new IllegalArgumentException("value must be either latitude or longitude");
+    }
+
+    static public ParsedDegree fromString(String toParse, boolean assumeLatitude, boolean assumeLongitude) {
+        if (assumeLatitude && assumeLongitude) {
+            throw new IllegalArgumentException("value cannot be both latitude and longitude at once");
+        }
+        var parser = new OneDegreeParser(assumeLatitude, toParse);
+        if (parser.foundLatitude) {
+            return new ParsedDegree(parser.latitude, true, false);
+        }
+        if (parser.foundLongitude) {
+            return new ParsedDegree(parser.longitude, false, true);
+        }
+        throw new IllegalArgumentException("could not parse: "+toParse);
+    }
+
+    public String toString() {
+        if (isLatitude) {
+            return "Latitude: "+degrees+" degrees";
+        } else {
+            return "Longitude: "+degrees+" degrees";
+        }
+    }
+
+}