Ant example source code file (KaffeNative2Ascii.java)

This example Ant source code file (KaffeNative2Ascii.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Ant tags/keywords

buildexception, buildexception, class, couldn't, defaultnative2ascii, executejava, executejava, implementation_name, kaffe, kaffenative2ascii, native2ascii, native2ascii, string, string

The KaffeNative2Ascii.java source code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.native2ascii;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.ProjectComponent;
import org.apache.tools.ant.taskdefs.ExecuteJava;
import org.apache.tools.ant.taskdefs.optional.Native2Ascii;
import org.apache.tools.ant.types.Commandline;

/**
 * Adapter to kaffe.tools.native2ascii.Native2Ascii.
 *
 * @since Ant 1.6.3
 */
public final class KaffeNative2Ascii extends DefaultNative2Ascii {

    // sorted by newest Kaffe version first
    private static final String[] N2A_CLASSNAMES = new String[] {
        "gnu.classpath.tools.native2ascii.Native2Ascii",
        // pre Kaffe 1.1.5
        "kaffe.tools.native2ascii.Native2Ascii",
    };

    /**
     * Identifies this adapter.
     */
    public static final String IMPLEMENTATION_NAME = "kaffe";

    /** {@inheritDoc} */
    protected void setup(Commandline cmd, Native2Ascii args)
        throws BuildException {
        if (args.getReverse()) {
            throw new BuildException("-reverse is not supported by Kaffe");
        }
        super.setup(cmd, args);
    }

    /** {@inheritDoc} */
    protected boolean run(Commandline cmd, ProjectComponent log)
        throws BuildException {
        ExecuteJava ej = new ExecuteJava();
        Class c = getN2aClass();
        if (c == null) {
            throw new BuildException("Couldn't load Kaffe's Native2Ascii"
                                     + " class");
        }

        cmd.setExecutable(c.getName());
        ej.setJavaCommand(cmd);
        ej.execute(log.getProject());
        // otherwise ExecuteJava has thrown an exception
        return true;
    }

    /**
     * tries to load Kaffe Native2Ascii and falls back to the older
     * class name if necessary.
     *
     * @return null if neither class can get loaded.
     */
    private static Class getN2aClass() {
        for (int i = 0; i < N2A_CLASSNAMES.length; i++) {
            try {
                return Class.forName(N2A_CLASSNAMES[i]);
            } catch (ClassNotFoundException cnfe) {
                // Ignore
            }
        }
        return null;
    }

}