Make javah a facade task, support kaffeh

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@277590 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -144,7 +144,7 @@ Other changes:
 * Added <target> nested elements to <ant> and <antcall> to allow
   specification of multiple sub-build targets, which are executed
   with a single dependency analysis.
-  
+
 * Refactored Target invocation into org.apache.tools.ant.Executor
   implementations.  Bugzilla Reports 21421, 29248.
 
@@ -203,7 +203,7 @@ Other changes:
 
 * Added length task to get strings' and files' lengths.
 
-* <native2ascii> now also supports Kaffe's version.
+* <native2ascii> and <javah> now also support Kaffe's versions.
 
 * Recursive token expansion in a filterset can now be disabled by
   setting its recurse attribute to false.
@@ -1291,6 +1291,18 @@ Other changes:
   clashes of custom tasks
 
 
+* <java> and <junit> now support <assertions>, which let you enable
+  and disable Java1.4 assertions on a package or class basis. These
+  only work when fork=true, currently.
+
+* .NET tasks expanded with VB support <vbc> and J#, via <jsharp>,
+  <importtypelib> and <ilasm>. <csc> supports nested <src> types,
+  <defines> for (potentially conditional) definitions, <reference>
+  filesets for references. The executable attribute lets you switch to
+  mono or other implementations -<csc> has been tested with Mono on
+  Linux and OSX.
+
+
 Changes from Ant 1.5.3 to Ant 1.5.4
 ===================================
 

docs/manual/OptionalTasks/javah.html

@@ -15,6 +15,16 @@ are needed to implement native methods. JNI operates differently depending on
 whether <a href="http://java.sun.com/j2se/1.3/docs/tooldocs/win32/javah.html">JDK1.2</a>
 (or later) or <a href="http://java.sun.com/products/jdk/1.1/docs/tooldocs/win32/javah.html">pre-JDK1.2</a>
 systems are used.</p>
+
+<p>It is possible to use different compilers. This can be selected
+with the <code>implementation</code> attribute.  <a
+name="implementationvalues">Here are the choices</a>:</p>
+<ul>
+  <li>default - the default compiler (kaffeh or sun) for the platform.</li>
+  <li>sun (the standard compiler of the JDK)</li>
+  <li>kaffeh (the native standard compiler of <a href="http://www.kaffe.org" target="_top">Kaffe</a>)</li>
+</ul>
+
 <h3>Parameters</h3>
 <table border="1" cellpadding="2" cellspacing="0">
   <tr>
@@ -74,8 +84,58 @@ systems are used.</p>
     <td valign="top"> location of installed extensions.</td>
     <td valign="top" align="center">No</td>
   </tr>
+  <tr>
+    <td valign="top">implementation</td>
+    <td valign="top">The compiler implementation to use.  If this
+    attribute is not set, the default compiler for the current VM
+    will be used.  (See the above <a
+    href="#implementationvalues">list</a> of valid compilers.)</td>
+    <td align="center" valign="top">No</td>
+  </tr>
 </table>
 <p>Either outputFile or destdir must be supplied, but not both.&nbsp;</p>
+
+<h3>Parameters specified as nested elements</h3>
+
+<h4>arg</h4>
+
+<p>You can specify additional command line arguments for the compiler
+with nested <code>&lt;arg&gt;</code> elements.  These elements are
+specified like <a href="../using.html#arg">Command-line Arguments</a>
+but have an additional attribute that can be used to enable arguments
+only if a given compiler implementation will be used.</p>
+
+<table border="1" cellpadding="2" cellspacing="0">
+<tr>
+  <td width="12%" valign="top"><b>Attribute</b></td>
+  <td width="78%" valign="top"><b>Description</b></td>
+  <td width="10%" valign="top"><b>Required</b></td>
+</tr>
+  <tr>
+    <td valign="top">value</td>
+    <td align="center" rowspan="4">See
+    <a href="../using.html#arg">Command-line Arguments</a>.</td>
+    <td align="center" rowspan="4">Exactly one of these.</td>
+  </tr>
+  <tr>
+    <td valign="top">line</td>
+  </tr>
+  <tr>
+    <td valign="top">file</td>
+  </tr>
+  <tr>
+    <td valign="top">path</td>
+  </tr>
+  <tr>
+    <td valign="top">implementation</td>
+    <td>Only pass the specified argument if the chosen compiler
+    implementation matches the value of this attribute.  Legal values
+    are the same as those in the above <a
+    href="#implementationvalues">list</a> of valid compilers.)</td>
+    <td align="center">No</td>
+  </tr>
+</table>
+
 <h3>Examples</h3>
 <pre>  &lt;javah destdir=&quot;c&quot; class=&quot;org.foo.bar.Wibble&quot;/&gt;</pre>
 <p>makes a JNI header of the named class, using the JDK1.2 JNI model. Assuming
@@ -110,7 +170,7 @@ writes the corresponding .c stubs. The verbose option will cause Javah to
 describe its progress.</p>
 
 <hr>
-<p align="center">Copyright &copy; 2001-2002,2004 The Apache Software Foundation. All rights
+<p align="center">Copyright &copy; 2001-2002,2004-2005 The Apache Software Foundation. All rights
 Reserved.</p>
 </body>
 

src/etc/testcases/taskdefs/optional/javah/build.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0"?>
+
+<!--
+   Copyright 2005 The Apache Software Foundation
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+-->
+<project default="no">
+
+  <property name="out" location="output"/>
+  <property name="in" location="input"/>
+
+  <target name="no">
+    <fail>For tests only</fail>
+  </target>
+
+  <target name="setUp">
+    <mkdir dir="${out}"/>
+  </target>
+
+  <target name="tearDown">
+    <delete dir="${out}"/>
+  </target>
+
+  <target name="compile" depends="setUp">
+    <javac srcdir="${in}" destdir="${out}"/>
+  </target>
+
+  <target name="simple-compile" depends="compile">
+    <javah destdir="${out}">
+      <class name="org.example.Foo"/>
+      <classpath>
+        <pathelement location="${out}"/>
+      </classpath>
+    </javah>
+  </target>
+</project>

src/etc/testcases/taskdefs/optional/javah/input/org/example/Foo.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2005 The Apache Software Foundation
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+package org.example;
+
+public class Foo {
+
+    public Foo() {}
+
+    public native String bar(Object baz);
+
+}

src/main/org/apache/tools/ant/taskdefs/optional/Javah.java

@@ -18,18 +18,21 @@
 package org.apache.tools.ant.taskdefs.optional;
 
 import java.io.File;
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Method;
+import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.StringTokenizer;
 import java.util.Vector;
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.Project;
 import org.apache.tools.ant.Task;
+import org.apache.tools.ant.taskdefs.optional.javah.JavahAdapter;
+import org.apache.tools.ant.taskdefs.optional.javah.JavahAdapterFactory;
 import org.apache.tools.ant.types.Commandline;
 import org.apache.tools.ant.types.Path;
 import org.apache.tools.ant.types.Reference;
 import org.apache.tools.ant.util.JavaEnvUtils;
+import org.apache.tools.ant.util.facade.FacadeTaskHelper;
+import org.apache.tools.ant.util.facade.ImplementationSpecificArgument;
 
 /**
  * Generates JNI header files using javah.
@@ -76,6 +79,11 @@ public class Javah extends Task {
     private Path bootclasspath;
     //private Path extdirs;
     private static String lSep = System.getProperty("line.separator");
+    private FacadeTaskHelper facade = null;
+
+    public Javah() {
+        facade = new FacadeTaskHelper(JavahAdapterFactory.getDefault());
+    }
 
     /**
      * the fully-qualified name of the class (or classes, separated by commas).
@@ -101,7 +109,6 @@ public class Javah extends Task {
 
         public void setName(String name) {
             this.name = name;
-            log("ClassArgument.name=" + name);
         }
 
         public String getName() {
@@ -109,6 +116,28 @@ public class Javah extends Task {
         }
     }
 
+    /**
+     * Names of the classes to process.
+     *
+     * @since Ant 1.6.3
+     */
+    public String[] getClasses() {
+        ArrayList al = new ArrayList();
+        if (cls != null) {
+            StringTokenizer tok = new StringTokenizer(cls, ",", false);
+            while (tok.hasMoreTokens()) {
+                al.add(tok.nextToken().trim());
+            }
+        }
+
+        Enumeration e = classes.elements();
+        while (e.hasMoreElements()) {
+            ClassArgument arg = (ClassArgument) e.nextElement();
+            al.add(arg.getName());
+        }
+        return (String[]) al.toArray(new String[0]);
+    }
+
     /**
      * Set the destination directory into which the Java source
      * files should be compiled.
@@ -117,6 +146,15 @@ public class Javah extends Task {
         this.destDir = destDir;
     }
 
+    /**
+     * The destination directory, if any.
+     *
+     * @since Ant 1.6.3
+     */
+    public File getDestdir() {
+        return destDir;
+    }
+
     /**
      * the classpath to use.
      */
@@ -146,6 +184,15 @@ public class Javah extends Task {
         createClasspath().setRefid(r);
     }
 
+    /**
+     * The classpath to use.
+     *
+     * @since Ant 1.6.3
+     */
+    public Path getClasspath() {
+        return classpath;
+    }
+
     /**
      * location of bootstrap class files.
      */
@@ -175,27 +222,14 @@ public class Javah extends Task {
         createBootclasspath().setRefid(r);
     }
 
-    ///**
-    // * Sets the extension directories that will be used during the
-    // * compilation.
-    // */
-    //public void setExtdirs(Path extdirs) {
-    //    if (this.extdirs == null) {
-    //        this.extdirs = extdirs;
-    //    } else {
-    //        this.extdirs.append(extdirs);
-    //    }
-    //}
-
-    ///**
-    // * Maybe creates a nested classpath element.
-    // */
-    //public Path createExtdirs() {
-    //    if (extdirs == null) {
-    //        extdirs = new Path(project);
-    //    }
-    //    return extdirs.createPath();
-    //}
+    /**
+     * The bootclasspath to use.
+     *
+     * @since Ant 1.6.3
+     */
+    public Path getBootclasspath() {
+        return bootclasspath;
+    }
 
     /**
      * Concatenates the resulting header or source files for all
@@ -205,6 +239,15 @@ public class Javah extends Task {
         this.outputFile = outputFile;
     }
 
+    /**
+     * The destination file, if any.
+     *
+     * @since Ant 1.6.3
+     */
+    public File getOutputfile() {
+        return outputFile;
+    }
+
     /**
      * If true, output files should always be written (JDK1.2 only).
      */
@@ -212,6 +255,15 @@ public class Javah extends Task {
         this.force = force;
     }
 
+    /**
+     * Whether output files should always be written.
+     *
+     * @since Ant 1.6.3
+     */
+    public boolean getForce() {
+        return force;
+    }
+
     /**
      * If true, specifies that old JDK1.0-style header files should be
      * generated.
@@ -221,6 +273,15 @@ public class Javah extends Task {
         this.old = old;
     }
 
+    /**
+     * Whether old JDK1.0-style header files should be generated.
+     *
+     * @since Ant 1.6.3
+     */
+    public boolean getOld() {
+        return old;
+    }
+
     /**
      * If true, generate C declarations from the Java object file (used with old).
      */
@@ -228,6 +289,15 @@ public class Javah extends Task {
         this.stubs = stubs;
     }
 
+    /**
+     * Whether C declarations from the Java object file should be generated.
+     *
+     * @since Ant 1.6.3
+     */
+    public boolean getStubs() {
+        return stubs;
+    }
+
     /**
      * If true, causes Javah to print a message concerning
      * the status of the generated files.
@@ -236,6 +306,51 @@ public class Javah extends Task {
         this.verbose = verbose;
     }
 
+    /**
+     * Whether verbose output should get generated.
+     *
+     * @since Ant 1.6.3
+     */
+    public boolean getVerbose() {
+        return verbose;
+    }
+
+    /**
+     * Choose the implementation for this particular task.
+     * @param impl the name of the implemenation
+     * @since Ant 1.6.3
+     */
+    public void setImplementation(String impl) {
+        if ("default".equals(impl)) {
+            facade.setImplementation(JavahAdapterFactory.getDefault());
+        } else {
+            facade.setImplementation(impl);
+        }        
+    }
+
+    /**
+     * Adds an implementation specific command-line argument.
+     * @return a ImplementationSpecificArgument to be configured
+     *
+     * @since Ant 1.6.3
+     */
+    public ImplementationSpecificArgument createArg() {
+        ImplementationSpecificArgument arg =
+            new ImplementationSpecificArgument();
+        facade.addImplementationArgument(arg);
+        return arg;
+    }
+
+    /**
+     * Returns the (implementation specific) settings given as nested
+     * arg elements.
+     *
+     * @since Ant 1.6.3
+     */
+    public String[] getCurrentArgs() {
+        return facade.getArgs();
+    }
+
     /**
      * Execute the task
      *
@@ -271,132 +386,20 @@ public class Javah extends Task {
             classpath = classpath.concatSystemClasspath("ignore");
         }
 
-        /* unused.
-        TODO: If anyone cannot come up with a reason for this, lets delete it
-
-        String compiler = getProject().getProperty("build.compiler");
-        if (compiler == null) {
-            if (!JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_1)
-                && !JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_2)) {
-                compiler = "modern";
-            } else {
-                compiler = "classic";
-            }
+        JavahAdapter ad = 
+            JavahAdapterFactory.getAdapter(facade.getImplementation(),
+                                           this);
+        if (!ad.compile(this)) {
+            throw new BuildException("compilation failed");
         }
-        */
-        doClassicCompile();
     }
 
-    // XXX
-    // we need a way to not use the current classpath.
-
     /**
-     * Performs a compile using the classic compiler that shipped with
-     * JDK 1.1 and 1.2.
-     */
-
-    private void doClassicCompile() throws BuildException {
-        Commandline cmd = setupJavahCommand();
-
-        // Use reflection to be able to build on all JDKs
-        /*
-        // provide the compiler a different message sink - namely our own
-        sun.tools.javac.Main compiler =
-                new sun.tools.javac.Main(new LogOutputStream(this, Project.MSG_WARN), "javac");
-
-        if (!compiler.compile(cmd.getArguments())) {
-            throw new BuildException("Compile failed");
-        }
-        */
-
-
-        try {
-            Class javahMainClass = null;
-            try {
-                // first search for the "old" javah class in 1.4.2 tools.jar
-                javahMainClass = Class.forName("com.sun.tools.javah.oldjavah.Main");
-            } catch (ClassNotFoundException cnfe) {
-                // assume older than 1.4.2 tools.jar
-                javahMainClass = Class.forName("com.sun.tools.javah.Main");
-            }
-
-            // now search for the constructor that takes in String[] arguments.
-            Class[] strings = new Class[] {String[].class};
-            Constructor constructor = javahMainClass.getConstructor(strings);
-
-            // construct the javah Main instance
-            Object javahMain = constructor.newInstance(new Object[] {cmd.getArguments()});
-
-            // find the run method
-            Method runMethod = javahMainClass.getMethod("run", new Class[0]);
-
-            runMethod.invoke(javahMain, new Object[0]);
-        } catch (Exception ex) {
-            if (ex instanceof BuildException) {
-                throw (BuildException) ex;
-            } else {
-                throw new BuildException("Error starting javah: " + ex, ex, getLocation());
-            }
-        }
-    }
-
-    /**
-     * Does the command line argument processing common to classic and
-     * modern.
+     * Logs the compilation parameters, adds the files to compile and logs the
+     * "niceSourceList"
      */
-    private Commandline setupJavahCommand() {
-        Commandline cmd = new Commandline();
-
-        if (destDir != null) {
-            cmd.createArgument().setValue("-d");
-            cmd.createArgument().setFile(destDir);
-        }
-
-        if (outputFile != null) {
-            cmd.createArgument().setValue("-o");
-            cmd.createArgument().setFile(outputFile);
-        }
-
-        if (classpath != null) {
-            cmd.createArgument().setValue("-classpath");
-            cmd.createArgument().setPath(classpath);
-        }
-
-        // JDK1.1 is rather simpler than JDK1.2
-        if (JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_1)) {
-            if (verbose) {
-                cmd.createArgument().setValue("-v");
-            }
-        } else {
-            if (verbose) {
-                cmd.createArgument().setValue("-verbose");
-            }
-            if (old) {
-                cmd.createArgument().setValue("-old");
-            }
-            if (force) {
-                cmd.createArgument().setValue("-force");
-            }
-        }
-
-        if (stubs) {
-            if (!old) {
-                throw new BuildException("stubs only available in old mode.", getLocation());
-            }
-            cmd.createArgument().setValue("-stubs");
-        }
-        Path bcp = new Path(getProject());
-        if (bootclasspath != null) {
-            bcp.append(bootclasspath);
-        }
-        bcp = bcp.concatSystemBootClasspath("ignore");
-        if (bcp.size() > 0) {
-            cmd.createArgument().setValue("-bootclasspath");
-            cmd.createArgument().setPath(bcp);
-        }
-
+    public void logAndAddFiles(Commandline cmd) {
         logAndAddFilesToCompile(cmd);
-        return cmd;
     }
 
     /**
@@ -404,32 +407,18 @@ public class Javah extends Task {
      * "niceSourceList"
      */
     protected void logAndAddFilesToCompile(Commandline cmd) {
-        int n = 0;
         log("Compilation " + cmd.describeArguments(),
             Project.MSG_VERBOSE);
 
         StringBuffer niceClassList = new StringBuffer();
-        if (cls != null) {
-            StringTokenizer tok = new StringTokenizer(cls, ",", false);
-            while (tok.hasMoreTokens()) {
-                String aClass = tok.nextToken().trim();
-                cmd.createArgument().setValue(aClass);
-                niceClassList.append("    " + aClass + lSep);
-                n++;
-            }
-        }
-
-        Enumeration e = classes.elements();
-        while (e.hasMoreElements()) {
-            ClassArgument arg = (ClassArgument) e.nextElement();
-            String aClass = arg.getName();
-            cmd.createArgument().setValue(aClass);
-            niceClassList.append("    " + aClass + lSep);
-            n++;
+        String[] c = getClasses();
+        for (int i = 0; i < c.length; i++) {
+            cmd.createArgument().setValue(c[i]);
+            niceClassList.append("    " + c[i] + lSep);
         }
 
         StringBuffer prefix = new StringBuffer("Class");
-        if (n > 1) {
+        if (c.length > 1) {
             prefix.append("es");
         }
         prefix.append(" to be compiled:");

src/main/org/apache/tools/ant/taskdefs/optional/Native2Ascii.java

@@ -123,7 +123,7 @@ public class Native2Ascii extends MatchingTask {
 
     /**
      * Choose the implementation for this particular task.
-     * @param compiler the name of the compiler
+     * @param impl the name of the implemenation
      * @since Ant 1.6.3
      */
     public void setImplementation(String impl) {

src/main/org/apache/tools/ant/taskdefs/optional/javah/JavahAdapter.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright  2005 The Apache Software Foundation
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package org.apache.tools.ant.taskdefs.optional.javah;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.taskdefs.optional.Javah;
+
+/**
+ * Interface for different backend implementations of the Javah task.
+ *
+ * @since Ant 1.6.3
+ */
+public interface JavahAdapter {
+    /**
+     * Performs the actual compilation.
+     *
+     * @since Ant 1.6.3
+     */
+    boolean compile(Javah javah) throws BuildException;
+}

src/main/org/apache/tools/ant/taskdefs/optional/javah/JavahAdapterFactory.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2005 The Apache Software Foundation
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+package org.apache.tools.ant.taskdefs.optional.javah;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.ProjectComponent;
+import org.apache.tools.ant.util.JavaEnvUtils;
+
+/**
+ * Creates the JavahAdapter based on the user choice and
+ * potentially the VM vendor.
+ *
+ * @since Ant 1.6.3
+ */
+public class JavahAdapterFactory {
+
+    /**
+     * Determines the default choice of adapter based on the VM
+     * vendor.
+     *
+     * @return the default choice of adapter based on the VM
+     * vendor
+     */
+    public static String getDefault() {
+        if (JavaEnvUtils.isKaffe()) {
+            return Kaffeh.IMPLEMENTATION_NAME;
+        }
+        return SunJavah.IMPLEMENTATION_NAME;
+    }
+
+    /**
+     * Creates the JavahAdapter based on the user choice and
+     * potentially the VM vendor.
+     *
+     * @param choice the user choice (if any).
+     * @param log a ProjectComponent instance used to access Ant's
+     * logging system.
+     * @return The adapter to use.
+     */
+    public static JavahAdapter getAdapter(String choice,
+                                          ProjectComponent log)
+        throws BuildException {
+        if ((JavaEnvUtils.isKaffe() && choice == null)
+            || Kaffeh.IMPLEMENTATION_NAME.equals(choice)) {
+            return new Kaffeh();
+        } else if (SunJavah.IMPLEMENTATION_NAME.equals(choice)) {
+            return new SunJavah();
+        } else if (choice != null) {
+            return resolveClassName(choice);
+        }
+
+        // This default has been good enough until Ant 1.6.3, so stick
+        // with it
+        return new SunJavah();
+    }
+
+    /**
+     * Tries to resolve the given classname into a native2ascii adapter.
+     * Throws a fit if it can't.
+     *
+     * @param className The fully qualified classname to be created.
+     * @throws BuildException This is the fit that is thrown if className
+     * isn't an instance of JavahAdapter.
+     */
+    private static JavahAdapter resolveClassName(String className)
+        throws BuildException {
+        try {
+            Class c = Class.forName(className);
+            Object o = c.newInstance();
+            return (JavahAdapter) o;
+        } catch (ClassNotFoundException cnfe) {
+            throw new BuildException("Can't load " + className, cnfe);
+        } catch (ClassCastException cce) {
+            throw new BuildException(className 
+                                     + " is not a Javah adapter", cce);
+        } catch (Throwable t) {
+            // for all other possibilities
+            throw new BuildException(className + " caused an interesting "
+                                     + "exception.", t);
+        }
+    }
+}

src/main/org/apache/tools/ant/taskdefs/optional/javah/Kaffeh.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2005 The Apache Software Foundation
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+package org.apache.tools.ant.taskdefs.optional.javah;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.taskdefs.Execute;
+import org.apache.tools.ant.taskdefs.optional.Javah;
+import org.apache.tools.ant.types.Commandline;
+import org.apache.tools.ant.types.Path;
+import org.apache.tools.ant.util.JavaEnvUtils;
+
+/**
+ * Adapter to the native kaffeh compiler.
+ *
+ * @since Ant 1.6.3
+ */
+public class Kaffeh implements JavahAdapter {
+
+    public static final String IMPLEMENTATION_NAME = "kaffeh";
+
+    /**
+     * Performs the actual compilation.
+     *
+     * @since Ant 1.6.3
+     */
+    public boolean compile(Javah javah) throws BuildException {
+        Commandline cmd = setupKaffehCommand(javah);
+        try {
+            Execute.runCommand(javah, cmd.getCommandline());
+            return true;
+        } catch (BuildException e) {
+            if (e.getMessage().indexOf("failed with return code") == -1) {
+                throw e;
+            }
+        }
+        return false;
+    }
+
+    private Commandline setupKaffehCommand(Javah javah) {
+        Commandline cmd = new Commandline();
+        cmd.setExecutable(JavaEnvUtils.getJdkExecutable("kaffeh"));
+
+        if (javah.getDestdir() != null) {
+            cmd.createArgument().setValue("-d");
+            cmd.createArgument().setFile(javah.getDestdir());
+        }
+
+        if (javah.getOutputfile() != null) {
+            cmd.createArgument().setValue("-o");
+            cmd.createArgument().setFile(javah.getOutputfile());
+        }
+
+        Path cp = new Path(javah.getProject());
+        if (javah.getBootclasspath() != null) {
+            cp.append(javah.getBootclasspath());
+        }
+        cp = cp.concatSystemBootClasspath("ignore");
+        if (javah.getClasspath() != null) {
+            cp.append(javah.getClasspath());
+        }
+        if (cp.size() > 0) {
+            cmd.createArgument().setValue("-classpath");
+            cmd.createArgument().setPath(cp);
+        }
+
+        if (!javah.getOld()) {
+            cmd.createArgument().setValue("-jni");
+        }
+
+        cmd.addArguments(javah.getCurrentArgs());
+
+        javah.logAndAddFiles(cmd);
+        return cmd;
+    }
+
+}

src/main/org/apache/tools/ant/taskdefs/optional/javah/SunJavah.java

@@ -0,0 +1,120 @@
+/*
+ * Copyright 2005 The Apache Software Foundation
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+package org.apache.tools.ant.taskdefs.optional.javah;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.taskdefs.ExecuteJava;
+import org.apache.tools.ant.taskdefs.optional.Javah;
+import org.apache.tools.ant.types.Commandline;
+import org.apache.tools.ant.types.Path;
+import org.apache.tools.ant.util.JavaEnvUtils;
+
+/**
+ * Adapter to com.sun.tools.javah.oldjavah.Main or com.sun.tools.javah.Main.
+ *
+ * @since Ant 1.6.3
+ */
+public class SunJavah implements JavahAdapter {
+
+    public static final String IMPLEMENTATION_NAME = "sun";
+
+    /**
+     * Performs the actual compilation.
+     *
+     * @since Ant 1.6.3
+     */
+    public boolean compile(Javah javah) throws BuildException {
+        Commandline cmd = setupJavahCommand(javah);
+        ExecuteJava ej = new ExecuteJava();
+
+        try {
+            try {
+                // first search for the "old" javah class in 1.4.2 tools.jar
+                Class.forName("com.sun.tools.javah.oldjavah.Main");
+                cmd.setExecutable("com.sun.tools.javah.oldjavah.Main");
+            } catch (ClassNotFoundException cnfe) {
+                // assume older than 1.4.2 tools.jar
+                Class.forName("com.sun.tools.javah.Main");
+                cmd.setExecutable("com.sun.tools.javah.Main");
+            }
+        } catch (ClassNotFoundException ex) {
+            throw new BuildException("Can't load javah", ex, 
+                                     javah.getLocation());
+        }
+        ej.setJavaCommand(cmd);
+        return ej.fork(javah) == 0;
+    }
+
+    private Commandline setupJavahCommand(Javah javah) {
+        Commandline cmd = new Commandline();
+
+        if (javah.getDestdir() != null) {
+            cmd.createArgument().setValue("-d");
+            cmd.createArgument().setFile(javah.getDestdir());
+        }
+
+        if (javah.getOutputfile() != null) {
+            cmd.createArgument().setValue("-o");
+            cmd.createArgument().setFile(javah.getOutputfile());
+        }
+
+        if (javah.getClasspath() != null) {
+            cmd.createArgument().setValue("-classpath");
+            cmd.createArgument().setPath(javah.getClasspath());
+        }
+
+        // JDK1.1 is rather simpler than JDK1.2
+        if (JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_1)) {
+            if (javah.getVerbose()) {
+                cmd.createArgument().setValue("-v");
+            }
+        } else {
+            if (javah.getVerbose()) {
+                cmd.createArgument().setValue("-verbose");
+            }
+            if (javah.getOld()) {
+                cmd.createArgument().setValue("-old");
+            }
+            if (javah.getForce()) {
+                cmd.createArgument().setValue("-force");
+            }
+            if (javah.getStubs() && !javah.getOld()) {
+                throw new BuildException("stubs only available in old mode.", 
+                                         javah.getLocation());
+            }
+        }
+
+        if (javah.getStubs()) {
+            cmd.createArgument().setValue("-stubs");
+        }
+        Path bcp = new Path(javah.getProject());
+        if (javah.getBootclasspath() != null) {
+            bcp.append(javah.getBootclasspath());
+        }
+        bcp = bcp.concatSystemBootClasspath("ignore");
+        if (bcp.size() > 0) {
+            cmd.createArgument().setValue("-bootclasspath");
+            cmd.createArgument().setPath(bcp);
+        }
+
+        cmd.addArguments(javah.getCurrentArgs());
+
+        javah.logAndAddFiles(cmd);
+        return cmd;
+    }
+
+}

src/testcases/org/apache/tools/ant/taskdefs/optional/JavahTest.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2005 The Apache Software Foundation
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+package org.apache.tools.ant.taskdefs.optional;
+
+import org.apache.tools.ant.BuildFileTest;
+
+public class JavahTest extends BuildFileTest {
+
+    private final static String BUILD_XML = 
+        "src/etc/testcases/taskdefs/optional/javah/build.xml";
+
+    public JavahTest(String name) {
+        super(name);
+    }
+
+    public void setUp() {
+        configureProject(BUILD_XML);
+    }
+
+    public void tearDown() {
+        executeTarget("tearDown");
+    }
+
+    public void testSimpleCompile() {
+        executeTarget("simple-compile");
+        assertTrue(getProject().resolveFile("output/org_example_Foo.h")
+                   .exists());
+    }
+
+}