Ant example source code file (Jikes.java)

This example Ant source code file (Jikes.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

commandline, commandline, defaultcompileradapter, e, jikes, jikes, o, p, path, path, string, string, use, using

The Jikes.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.compilers;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.Commandline;
import org.apache.tools.ant.types.Path;

/**
 * The implementation of the jikes compiler.
 * This is primarily a cut-and-paste from the original javac task before it
 * was refactored.
 *
 * @since Ant 1.3
 */
public class Jikes extends DefaultCompilerAdapter {

    /**
     * Performs a compile using the Jikes compiler from IBM.
     * Mostly of this code is identical to doClassicCompile()
     * However, it does not support all options like
     * extdirs, deprecation and so on, because
     * there is no option in jikes and I don't understand
     * what they should do.
     *
     * It has been successfully tested with jikes >1.10.
     * @return true if the compilation succeeded
     * @throws BuildException on error
     */
    public boolean execute() throws BuildException {
        attributes.log("Using jikes compiler", Project.MSG_VERBOSE);

        Commandline cmd = new Commandline();

        // For -sourcepath, use the "sourcepath" value if present.
        // Otherwise default to the "srcdir" value.
        Path sourcepath = null;
        if (compileSourcepath != null) {
            sourcepath = compileSourcepath;
        } else {
            sourcepath = src;
        }
        // If the buildfile specifies sourcepath="", then don't
        // output any sourcepath.
        if (sourcepath.size() > 0) {
            cmd.createArgument().setValue("-sourcepath");
            cmd.createArgument().setPath(sourcepath);
        }

        Path classpath = new Path(project);

        if (bootclasspath == null || bootclasspath.size() == 0) {
            // no bootclasspath, therefore, get one from the java runtime
            includeJavaRuntime = true;
        } else {
            // there is a bootclasspath stated.  By default, the
            // includeJavaRuntime is false.  If the user has stated a
            // bootclasspath and said to include the java runtime, it's on
            // their head!
        }
        classpath.append(getCompileClasspath());

        // if the user has set JIKESPATH we should add the contents as well
        String jikesPath = System.getProperty("jikes.class.path");
        if (jikesPath != null) {
            classpath.append(new Path(project, jikesPath));
        }

        if (extdirs != null && extdirs.size() > 0) {
            cmd.createArgument().setValue("-extdirs");
            cmd.createArgument().setPath(extdirs);
        }

        String exec = getJavac().getExecutable();
        cmd.setExecutable(exec == null ? "jikes" : exec);

        if (deprecation) {
            cmd.createArgument().setValue("-deprecation");
        }

        if (destDir != null) {
            cmd.createArgument().setValue("-d");
            cmd.createArgument().setFile(destDir);
        }

        cmd.createArgument().setValue("-classpath");
        cmd.createArgument().setPath(classpath);

        if (encoding != null) {
            cmd.createArgument().setValue("-encoding");
            cmd.createArgument().setValue(encoding);
        }
        if (debug) {
            String debugLevel = attributes.getDebugLevel();
            if (debugLevel != null) {
                cmd.createArgument().setValue("-g:" + debugLevel);
            } else {
                cmd.createArgument().setValue("-g");
            }
        } else {
            cmd.createArgument().setValue("-g:none");
        }
        if (optimize) {
            cmd.createArgument().setValue("-O");
        }
        if (verbose) {
            cmd.createArgument().setValue("-verbose");
        }
        if (depend) {
            cmd.createArgument().setValue("-depend");
        }

        if (target != null) {
            cmd.createArgument().setValue("-target");
            cmd.createArgument().setValue(target);
        }

        /**
         * XXX
         * Perhaps we shouldn't use properties for these
         * three options (emacs mode, warnings and pedantic),
         * but include it in the javac directive?
         */

        /**
         * Jikes has the nice feature to print error
         * messages in a form readable by emacs, so
         * that emacs can directly set the cursor
         * to the place, where the error occurred.
         */
        String emacsProperty = project.getProperty("build.compiler.emacs");
        if (emacsProperty != null && Project.toBoolean(emacsProperty)) {
            cmd.createArgument().setValue("+E");
        }

        /**
         * Jikes issues more warnings that javac, for
         * example, when you have files in your classpath
         * that don't exist. As this is often the case, these
         * warning can be pretty annoying.
         */
        String warningsProperty =
            project.getProperty("build.compiler.warnings");
        if (warningsProperty != null) {
            attributes.log("!! the build.compiler.warnings property is "
                           + "deprecated. !!", Project.MSG_WARN);
            attributes.log("!! Use the nowarn attribute instead. !!",
                           Project.MSG_WARN);
            if (!Project.toBoolean(warningsProperty)) {
                cmd.createArgument().setValue("-nowarn");
            }
        }
        if (attributes.getNowarn()) {
            cmd.createArgument().setValue("-nowarn");
        }

        /**
         * Jikes can issue pedantic warnings.
         */
        String pedanticProperty =
            project.getProperty("build.compiler.pedantic");
        if (pedanticProperty != null && Project.toBoolean(pedanticProperty)) {
            cmd.createArgument().setValue("+P");
        }

        /**
         * Jikes supports something it calls "full dependency
         * checking", see the jikes documentation for differences
         * between -depend and +F.
         */
        String fullDependProperty =
            project.getProperty("build.compiler.fulldepend");
        if (fullDependProperty != null
            && Project.toBoolean(fullDependProperty)) {
            cmd.createArgument().setValue("+F");
        }

        if (attributes.getSource() != null) {
            cmd.createArgument().setValue("-source");
            String source = attributes.getSource();
            if (source.equals("1.1") || source.equals("1.2")) {
                // support for -source 1.1 and -source 1.2 has been
                // added with JDK 1.4.2, Jikes doesn't like it
                attributes.log("Jikes doesn't support '-source "
                               + source + "', will use '-source 1.3' instead");
                cmd.createArgument().setValue("1.3");
            } else {
                cmd.createArgument().setValue(source);
            }
        }

        addCurrentCompilerArgs(cmd);

        int firstFileName = cmd.size();

        Path boot = getBootClassPath();
        if (boot.size() > 0) {
            cmd.createArgument().setValue("-bootclasspath");
            cmd.createArgument().setPath(boot);
        }

        logAndAddFilesToCompile(cmd);

        return
            executeExternalCompile(cmd.getCommandline(), firstFileName) == 0;
    }


}