1 files changed, 32 insertions, 0 deletions

diff --git a/src/net/gcdc/asn1/datatypes/AlphabetBuilder.java b/src/net/gcdc/asn1/datatypes/AlphabetBuilder.java
new file mode 100644
index 0000000..cdff30e
--- /dev/null
+++ b/src/net/gcdc/asn1/datatypes/AlphabetBuilder.java
@@ -0,0 +1,32 @@
+package net.gcdc.asn1.datatypes;
+
+
+public class AlphabetBuilder {
+
+    private final StringBuilder sb = new StringBuilder();
+
+    public AlphabetBuilder() {}
+
+    public String chars() {
+        return sb.toString();
+    }
+
+    public AlphabetBuilder withRange(char from, char to) {
+        for (char c = from; c <= to; c++) {
+            sb.append(c);
+        }
+        return this;
+    }
+
+    public AlphabetBuilder withChars(String str) {
+        sb.append(str);
+        return this;
+    }
+
+    public AlphabetBuilder withChars(Character... chars) {
+        for (char c : chars) {
+            sb.append(c);
+        }
+        return this;
+    }
+}