commit 17c76cac7a59cfdf0b5244c080d59fb5953fb305
Author: Marcel M. Otte <otte.mm@googlemail.com>
Date:   Thu Dec 12 20:08:52 2013 +0100

    inital commit

diff --git a/CmdOptions.java b/CmdOptions.java
new file mode 100644
index 0000000..b3881cb
--- /dev/null
+++ b/CmdOptions.java
@@ -0,0 +1,206 @@
+package at.mkw.inlocs.blinksetassembler.server;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.HashMap;
+
+public class CmdOptions {
+
+  private static CmdOptions instance;
+
+  public static class Option {
+    public String name;
+    public String cmdOption;
+    public String longCmdOption;
+    public String description;
+    public String defaultParameter;
+    public String[] possibleParams;
+    public String[] alternatives;
+    public boolean set;
+    public ArrayList<String> values;
+
+    public Option() {
+      values = new ArrayList<String>();
+    }
+
+    public String toString() {
+      String ret = name + " (" + longCmdOption + (cmdOption != null ? "/" + cmdOption : "") + ")"
+          + (defaultParameter != null ? ": default=" + defaultParameter : "") + (description != null ? "\n\t\t" + description : "");
+      if (possibleParams != null) {
+        boolean start = true;
+        ret += "\n\t\t(Possible parameters: ";
+        for (String s : possibleParams) {
+          ret += (start ? "" : ", ") + s;
+          start = false;
+        }
+        ret += ")";
+      }
+      if (set) {
+        ret += "\n\t\t--> current Setting: ";
+        if (values.size() > 0) {
+          boolean start = true;
+          for (String s : values) {
+            ret += (start ? "" : ",") + s;
+            start = false;
+          }
+        } else {
+          ret += "true";
+        }
+        // ret += "\n";
+      }
+      return ret;
+    }
+  }
+
+  private HashMap<String, Option> options;
+
+  private CmdOptions() {
+    options = new HashMap<String, Option>();
+    this.setOption("help", "--help", "-h", null, "Show all possible options and their parameters.", null, new String[] { "-?" });
+  }
+
+  public static CmdOptions i() {
+    if (instance == null) {
+      instance = new CmdOptions();
+    }
+    return instance;
+  }
+
+  public String[] getOption(String name) {
+    if (options.get(name).values.size() > 0)
+      return options.get(name).values.toArray(new String[0]);
+    else if (options.get(name).defaultParameter != null)
+      return new String[] { options.get(name).defaultParameter };
+    return null;
+  }
+
+  public Integer[] getOptionAsInt(String name) {
+    if (options.get(name).values.size() > 0) {
+      ArrayList<Integer> list = new ArrayList<Integer>();
+      for (String o : options.get(name).values) {
+        list.add(Integer.parseInt(o));
+      }
+      return list.toArray(new Integer[0]);
+    } else if (options.get(name).defaultParameter != null)
+      return new Integer[] { Integer.parseInt(options.get(name).defaultParameter) };
+    return null;
+  }
+
+  public Double[] getOptionAsDouble(String name) {
+    if (options.get(name).values.size() > 0) {
+      ArrayList<Double> list = new ArrayList<Double>();
+      for (String o : options.get(name).values) {
+        list.add(Double.parseDouble(o));
+      }
+      return list.toArray(new Double[0]);
+    } else if (options.get(name).defaultParameter != null)
+      return new Double[] { Double.parseDouble(options.get(name).defaultParameter) };
+    return null;
+  }
+
+  public boolean isSet(String option) {
+    return options.get(option).set;
+  }
+
+  public boolean isSet(String option, String parameter) {
+    for (String o : options.get(option).values) {
+      if (o.equals(parameter)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  public void setOption(String name, String longcmd, String cmd, String defaultparam, String description) {
+    this.setOption(name, longcmd, cmd, defaultparam, description, null, null);
+  }
+
+  public void setOption(String name, String longcmd, String cmd, String defaultparam, String description, String[] possibleParams, String[] alternatives) {
+    Option o = new Option();
+    o.cmdOption = cmd;
+    o.name = name;
+    o.longCmdOption = longcmd;
+    o.defaultParameter = defaultparam;
+    o.description = description;
+    o.alternatives = alternatives;
+    o.possibleParams = possibleParams;
+    options.put(name, o);
+  }
+
+  public String toString(boolean help) {
+    StringBuilder b = new StringBuilder();
+    if (help) {
+      b.append("Possible options:\n");
+    }
+    b.append("-options\n");
+    Option[] vars = options.values().toArray(new Option[0]);
+    Arrays.sort(vars, new Comparator<Option>() {
+      @Override
+      public int compare(Option o1, Option o2) {
+        return o1.name.compareTo(o2.name);
+      }
+    });
+    for (Option o : vars) {
+      b.append("\t").append(o.toString()).append("\n");
+    }
+    b.append("/options\n");
+    return b.toString();
+  }
+
+  public void parse(String[] args) {
+    // now parse
+    if (args.length > 0) {
+      int l = 0, i = 0;
+      String arg = null;
+      // iterate through all options
+      for (; i < args.length; ++i) {
+        arg = args[i];
+        Option o = null;
+        // search for correct option
+        for (Option op : options.values()) {
+          if (arg.equals(op.longCmdOption) || op.cmdOption != null && arg.equals(op.cmdOption) || op.alternatives != null
+              && Arrays.asList(op.alternatives).contains(arg)) {
+            o = op;
+            break;
+          }
+        }
+        // if it is unknown
+        if (o == null) {
+          System.err.println("Unrecognized option '" + arg + "'");
+          continue;
+        }
+        o.set = true;
+        // now iterate through the parameters
+        int j = i + 1;
+        while (args.length > j && !args[j].startsWith("-")) {
+          if (o.possibleParams != null) {
+            if (Arrays.asList(o.possibleParams).contains(args[j]))
+              o.values.add(args[j]);
+            else
+              System.err.println("Parameter \"" + args[j] + "\" for Option \"" + o.name + "\" not allowed!");
+          } else {
+            o.values.add(args[j]);
+          }
+          ++j;
+        }
+        i = j - 1;
+      }
+    }
+    if (options.get("help").set) {
+      System.out.println(this.toString(true));
+      System.exit(0);
+    }
+
+    // set default for that options that aren't set
+    for (Option o : options.values()) {
+      if (!o.set && o.defaultParameter != null && o.defaultParameter.equals("")) {
+        System.err.println(o.name + " (" + o.cmdOption + "): has no default parameter and has to be set on commandline!");
+        System.exit(1);
+      }
+      if (!o.set && o.defaultParameter != null)
+        o.values.add(o.defaultParameter);
+    }
+    System.out.println(this.toString(false));
+  }
+}