Issue-#428: Read product version from .properties resource, which reflects the value defined in pom.xml.

pom.xml

@@ -7,7 +7,7 @@
   	Javassist (JAVA programming ASSISTant) makes Java bytecode manipulation
     simple.  It is a class library for editing bytecodes in Java.
   </description>
-  <version>3.29.2-GA</version>
+  <version>3.29.3-GA-SNAPSHOT</version>
   <name>Javassist</name>
   <url>http://www.javassist.org/</url>
 
@@ -138,6 +138,12 @@
     </snapshotRepository>
   </distributionManagement>
   <build>
+    <resources>
+      <resource>
+        <directory>src/main/resources</directory>
+        <filtering>true</filtering>
+      </resource>
+    </resources>
     <plugins>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>

src/main/java/javassist/CtClass.java

@@ -26,6 +26,7 @@ import java.io.OutputStream;
 import java.net.URL;
 import java.security.ProtectionDomain;
 import java.util.Collection;
+import java.util.Properties;
 
 import javassist.bytecode.ClassFile;
 import javassist.bytecode.Descriptor;
@@ -69,7 +70,7 @@ public abstract class CtClass {
     /**
      * The version number of this release.
      */
-    public static final String version = "3.29.2-GA";
+    public static final String version = readProductVersion();
 
     /**
      * Prints the version number and the copyright notice.
@@ -583,7 +584,7 @@ public abstract class CtClass {
      * For decoding, use <code>javassist.Modifier</code>.
      *
      * <p>If the class is a static nested class (a.k.a. static inner class),
-     * the returned modifiers include <code>Modifier.STATIC</code>. 
+     * the returned modifiers include <code>Modifier.STATIC</code>.
      *
      * @see Modifier
      */
@@ -785,7 +786,7 @@ public abstract class CtClass {
     /**
      * Returns the immediately enclosing method of this class.
      * This method works only with JDK 1.5 or later.
-     * 
+     *
      * @return null if this class is not a local class or an anonymous
      * class.
      * @deprecated The enclosing method might be a constructor.
@@ -818,7 +819,7 @@ public abstract class CtClass {
     /**
      * Makes a new public nested class.  If this method is called,
      * the <code>CtClass</code>, which encloses the nested class, is modified
-     * since a class file includes a list of nested classes.  
+     * since a class file includes a list of nested classes.
      *
      * <p>The current implementation only supports a static nested class.
      * <code>isStatic</code> must be true.
@@ -1443,7 +1444,7 @@ public abstract class CtClass {
      * <p>If <code>ClassPool.doPruning</code> is true, the automatic pruning
      * is on by default.  Otherwise, it is off.  The default value of
      * <code>ClassPool.doPruning</code> is false.
-     * 
+     *
      * @param stop      disallow pruning if true.  Otherwise, allow.
      * @return the previous status of pruning.  true if pruning is already stopped.
      *
@@ -1467,7 +1468,7 @@ public abstract class CtClass {
      *
      * <p><code>toBytecode()</code>, <code>writeFile()</code>, and
      * <code>toClass()</code> internally call this method if
-     * automatic pruning is on. 
+     * automatic pruning is on.
      *
      * <p>According to some experiments, pruning does not really reduce
      * memory consumption.  Only about 20%.  Since pruning takes time,
@@ -1685,4 +1686,14 @@ public abstract class CtClass {
      * This method is overridden by CtClassType.
      */
     void compress() {}
+
+    private static String readProductVersion() {
+        try {
+        final Properties properties = new Properties();
+            properties.load(CtClass.class.getClassLoader().getResourceAsStream(".properties"));
+        return properties.getProperty("product.version");
+        } catch (IOException e) {
+            throw new RuntimeException("Failed to a resource '.properties' from the classpath. (Packaging issue)", e);
+        }
+    }
 }

src/main/resources/.properties

@@ -0,0 +1 @@
+product.version=${project.version}