From f309d89222b3a0033b1bced96ee1766f41a0f27f Mon Sep 17 00:00:00 2001
From: Georgios Gousios <gousiosg@gmail.com>
Date: Wed, 27 Jun 2012 18:35:02 +0200
Subject: [PATCH] Do not autogenerate Version class on every compile.

Instead, use a properties template file and Maven filtering
to set the correct version while building the output jar.
At runtime, load the properties file from the classpath and
statically initialize the version parameter.
---
 pom.xml                                       |  6 ++++
 .../java/org/umlgraph/doclet/Version.java     | 29 +++++++++++++++++++
 src/main/resources/version.properties         |  1 +
 3 files changed, 36 insertions(+)
 create mode 100644 src/main/java/org/umlgraph/doclet/Version.java

diff --git a/pom.xml b/pom.xml
index 3a0489e..d6dab5a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -36,6 +36,12 @@
   <dependencies/>
 
   <build>
+    <resources>
+      <resource>
+        <directory>src/main/resources</directory>
+        <filtering>true</filtering>
+      </resource>
+    </resources>
     <plugins>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
diff --git a/src/main/java/org/umlgraph/doclet/Version.java b/src/main/java/org/umlgraph/doclet/Version.java
new file mode 100644
index 0000000..3db05df
--- /dev/null
+++ b/src/main/java/org/umlgraph/doclet/Version.java
@@ -0,0 +1,29 @@
+package org.umlgraph.doclet;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Properties;
+
+class Version {
+    private final static String filename = "version.properties";
+    private final static String key = "umlgraph.version";
+    public static String VERSION;
+
+    static {
+        Properties props = new Properties();
+        InputStream in = Version.class.getClassLoader().getResourceAsStream(filename);
+        try {
+            props.load(in);
+            if (props.get(key) == null) {
+                System.err.println("Could not find version property");
+                VERSION = "0";
+            } else {
+                VERSION = props.get(key).toString();
+            }
+
+            in.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/src/main/resources/version.properties b/src/main/resources/version.properties
index e69de29..3d3ff90 100644
--- a/src/main/resources/version.properties
+++ b/src/main/resources/version.properties
@@ -0,0 +1 @@
+umlgraph.version=${pom.version}
\ No newline at end of file