From 667c79c1aa111f7551f993b36cdd73cf285596e4 Mon Sep 17 00:00:00 2001
From: 6543 <6543@obermui.de>
Date: Sun, 13 Oct 2019 15:05:37 +0200
Subject: [PATCH] add program

---
 java-cli.iml                 |  12 +++++
 src/com/company/Main.java    |  32 +++++++++++
 src/com/company/Version.java | 100 +++++++++++++++++++++++++++++++++++
 3 files changed, 144 insertions(+)
 create mode 100644 java-cli.iml
 create mode 100644 src/com/company/Main.java
 create mode 100644 src/com/company/Version.java

diff --git a/java-cli.iml b/java-cli.iml
new file mode 100644
index 0000000..d5c0743
--- /dev/null
+++ b/java-cli.iml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+
diff --git a/src/com/company/Main.java b/src/com/company/Main.java
new file mode 100644
index 0000000..ab28ec3
--- /dev/null
+++ b/src/com/company/Main.java
@@ -0,0 +1,32 @@
+package com.company;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+        //supported versions;
+        String latest_version =  "1.9.4";
+        String min_version = "1.8.3";
+
+
+        System.out.println("\nMinimum Requred Version: "  + min_version + " | Latest Stable Version: " + latest_version + "\n");
+        
+        
+        System.out.println("Test Versions ...");
+        Version.result A = Version.check(min_version,latest_version,"1.9.4");
+        Version.result B = Version.check(min_version,latest_version,"1.10.0+dev-414-gf1fdd782d");
+        Version.result C = Version.check(min_version,latest_version,"no-version-at-all");
+        Version.result D = Version.check(min_version,latest_version,"1.8.1");
+        Version.result E = Version.check(min_version,latest_version,"1.10.0");
+
+        System.out.println("1.9.4 = " + A.name());
+        System.out.println("1.10.0+dev-414-gf1fdd782d = " + B.name());
+        System.out.println("-no-version-at-all- = " + C.name());
+        System.out.println("1.8.1 = " + D.name());
+        System.out.println("1.10.0 = " + E.name());
+
+        System.out.println("...");
+
+
+    }
+}
diff --git a/src/com/company/Version.java b/src/com/company/Version.java
new file mode 100644
index 0000000..375a945
--- /dev/null
+++ b/src/com/company/Version.java
@@ -0,0 +1,100 @@
+package com.company;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Version {
+    public enum result{
+        UNKNOWN,
+        SUPPORTED_LATEST,
+        SUPPORTED_OLD,
+        DEVELOPMENT,
+        UNSUPPORTED_OLD,
+        UNSUPPORTED_NEW
+    }
+
+
+    public static result check(String min, String last, String value) {
+
+        final Pattern pattern_stable_release = Pattern.compile("^(\\d)\\.(\\d+)\\.(\\d+)$");
+        final Pattern pattern_dev_release = Pattern.compile("^(\\d).(\\d+).(\\d+)(\\D)(.+)");
+        Matcher m ;
+
+        m = pattern_stable_release.matcher(value);
+        if (m.find()) {
+
+            switch (correlate(min, last, m.group())){
+                case 0:
+                    return result.UNSUPPORTED_OLD;
+                case 1:
+                    return result.SUPPORTED_OLD;
+                case 2:
+                    return result.SUPPORTED_LATEST;
+                default:
+                    return result.UNSUPPORTED_NEW;
+            }
+
+        }
+        m = pattern_dev_release.matcher(value);
+        if (m.find()) {
+
+            m = Pattern.compile("^(\\d)\\.(\\d+)\\.(\\d+)").matcher(value);
+            m.find();
+
+            if (correlate(min, last, m.group())>0) {
+                return result.DEVELOPMENT;
+            } else {
+                return result.UNSUPPORTED_OLD;
+            }
+
+        }
+
+        return result.UNKNOWN;
+
+    }
+
+    //helper
+    // 0 to less
+    // 1 in spectrum
+    // 2 at the top
+    // 3 above
+    private static int correlate(String min, String last, String value){
+        //init
+        int i_min = 0, i_last = 0, i_value = 0;
+
+        while (value.indexOf(".")>0) {
+
+            //prepare for checks
+            if (min.indexOf(".") >= 0) i_min = Integer.valueOf(min.substring(0,min.indexOf(".")));
+            if (last.indexOf(".") >= 0) i_last = Integer.valueOf(last.substring(0,last.indexOf(".")));
+            if (value.indexOf(".") >= 0) i_value = Integer.valueOf(value.substring(0,value.indexOf(".")));
+
+
+            if ( i_min != i_last ) {
+                //check
+                if (i_value < i_min) return 0;
+                if (i_value > i_last) return 3;
+            }
+
+            //prepare for next checks
+            if (min.indexOf(".") < 0) return 0;
+
+            min = min.substring(min.indexOf(".")+1);
+            last = last.substring(last.indexOf(".")+1);
+            value = value.substring(value.indexOf(".")+1);
+
+        }
+
+        i_min = Integer.valueOf(min);
+        i_last = Integer.valueOf(last);
+        i_value = Integer.valueOf(value);
+
+        if (i_value < i_min) return 0;
+        if (i_min < i_value && i_value < i_last) return 1;
+        if (i_value == i_last) return 2;
+        if (i_value > i_last) return 3;
+
+
+        return 0;
+    }
+}