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Ant example source code file (DefaultRmicAdapter.java)

This example Ant source code file (DefaultRmicAdapter.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, filenamemapper, filenamemapper, iiop, io, path, path, rmic, rmicfilenamemapper, string, string, stub_1_2, stub_compat, unable, util

The DefaultRmicAdapter.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.rmic;

import java.io.File;
import java.util.Random;
import java.util.Vector;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Rmic;
import org.apache.tools.ant.types.Commandline;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.util.FileNameMapper;

/**
 * This is the default implementation for the RmicAdapter interface.
 * Currently, this is a cut-and-paste of the original rmic task and
 * DefaultCopmpilerAdapter.
 *
 * @since Ant 1.4
 */
public abstract class DefaultRmicAdapter implements RmicAdapter {

    private Rmic attributes;
    private FileNameMapper mapper;
    private static final Random RAND = new Random();
    /** suffix denoting a stub file */
    public static final String RMI_STUB_SUFFIX = "_Stub";
    /** suffix denoting a skel file */
    public static final String RMI_SKEL_SUFFIX = "_Skel";
    /** suffix denoting a tie file */
    public static final String RMI_TIE_SUFFIX = "_Tie";
    /** arg for compat */
    public static final String STUB_COMPAT = "-vcompat";
    /** arg for 1.1 */
    public static final String STUB_1_1 = "-v1.1";
    /** arg for 1.2 */
    public static final String STUB_1_2 = "-v1.2";

    /**
     * Default constructor
     */
    public DefaultRmicAdapter() {
    }

    /**
     * Sets Rmic attributes
     * @param attributes the rmic attributes
     */
    public void setRmic(final Rmic attributes) {
        this.attributes = attributes;
        mapper = new RmicFileNameMapper();
    }

    /**
     * Get the Rmic attributes
     * @return the attributes as a Rmic taskdef
     */
    public Rmic getRmic() {
        return attributes;
    }

    /**
     * Gets the stub class suffix
     * @return the stub suffix "_Stub"
     */
    protected String getStubClassSuffix() {
        return RMI_STUB_SUFFIX;
    }

    /**
     * Gets the skeleton class suffix
     * @return the skeleton suffix "_Skel"
     */
    protected String getSkelClassSuffix() {
        return RMI_SKEL_SUFFIX;
    }

    /**
     * Gets the tie class suffix
     * @return the tie suffix "_Tie"
     */
    protected String getTieClassSuffix() {
        return RMI_TIE_SUFFIX;
    }

    /**
     * This implementation returns a mapper that may return up to two
     * file names.
     *
     * <ul>
     *   <li>for JRMP it will return *_getStubClassSuffix (and
     *   *_getSkelClassSuffix if JDK 1.1 is used)</li>
     *
     *   <li>for IDL it will return a random name, causing <rmic> to
     *     always recompile.</li>
     *
     *   <li>for IIOP it will return _*_getStubClassSuffix for
     *   interfaces and _*_getStubClassSuffix for non-interfaces (and
     *   determine the interface and create _*_Stub from that).</li>
     * </ul>
     * @return a <code>FileNameMapper
     */
    public FileNameMapper getMapper() {
        return mapper;
    }

    /**
     * Gets the CLASSPATH this rmic process will use.
     * @return the classpath
     */
    public Path getClasspath() {
        return getCompileClasspath();
    }

    /**
     * Builds the compilation classpath.
     * @return the classpath
     */
    protected Path getCompileClasspath() {
        Path classpath = new Path(attributes.getProject());
        // add dest dir to classpath so that previously compiled and
        // untouched classes are on classpath
        classpath.setLocation(attributes.getBase());

        // Combine the build classpath with the system classpath, in an
        // order determined by the value of build.sysclasspath

        Path cp = attributes.getClasspath();
        if (cp == null) {
            cp = new Path(attributes.getProject());
        }
        if (attributes.getIncludeantruntime()) {
            classpath.addExisting(cp.concatSystemClasspath("last"));
        } else {
            classpath.addExisting(cp.concatSystemClasspath("ignore"));
        }

        if (attributes.getIncludejavaruntime()) {
            classpath.addJavaRuntime();
        }
        return classpath;
    }

    /**
     * Setup rmic argument for rmic.
     * @return the command line
     */
    protected Commandline setupRmicCommand() {
        return setupRmicCommand(null);
    }

    /**
     * Setup rmic argument for rmic.
     * @param options additional parameters needed by a specific
     *                implementation.
     * @return the command line
     */
    protected Commandline setupRmicCommand(String[] options) {
        Commandline cmd = new Commandline();

        if (options != null) {
            for (int i = 0; i < options.length; i++) {
                cmd.createArgument().setValue(options[i]);
            }
        }

        Path classpath = getCompileClasspath();

        cmd.createArgument().setValue("-d");
        cmd.createArgument().setFile(attributes.getBase());

        if (attributes.getExtdirs() != null) {
            cmd.createArgument().setValue("-extdirs");
            cmd.createArgument().setPath(attributes.getExtdirs());
        }

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

        //handle the many different stub options.
        String stubVersion = attributes.getStubVersion();
        //default is compatibility
        String stubOption = null;
        if (null != stubVersion) {
            if ("1.1".equals(stubVersion)) {
                stubOption = STUB_1_1;
            } else if ("1.2".equals(stubVersion)) {
                stubOption = STUB_1_2;
            } else if ("compat".equals(stubVersion)) {
                stubOption = STUB_COMPAT;
            } else {
                //anything else
                attributes.log("Unknown stub option " + stubVersion);
                //do nothing with the value? or go -v+stubVersion??
            }
        }
        //for java1.5+, we generate compatible stubs, that is, unless
        //the caller asked for IDL or IIOP support.
        if (stubOption == null
            && !attributes.getIiop()
            && !attributes.getIdl()) {
            stubOption = STUB_COMPAT;
        }
        if (stubOption != null) {
            //set the non-null stubOption
            cmd.createArgument().setValue(stubOption);
        }
        if (null != attributes.getSourceBase()) {
            cmd.createArgument().setValue("-keepgenerated");
        }

        if (attributes.getIiop()) {
            attributes.log("IIOP has been turned on.", Project.MSG_INFO);
            cmd.createArgument().setValue("-iiop");
            if (attributes.getIiopopts() != null) {
                attributes.log("IIOP Options: " + attributes.getIiopopts(),
                               Project.MSG_INFO);
                cmd.createArgument().setValue(attributes.getIiopopts());
            }
        }

        if (attributes.getIdl())  {
            cmd.createArgument().setValue("-idl");
            attributes.log("IDL has been turned on.", Project.MSG_INFO);
            if (attributes.getIdlopts() != null) {
                cmd.createArgument().setValue(attributes.getIdlopts());
                attributes.log("IDL Options: " + attributes.getIdlopts(),
                               Project.MSG_INFO);
            }
        }

        if (attributes.getDebug()) {
            cmd.createArgument().setValue("-g");
        }

        cmd.addArguments(attributes.getCurrentCompilerArgs());

        logAndAddFilesToCompile(cmd);
        return cmd;
     }

    /**
     * Logs the compilation parameters, adds the files to compile and logs the
     * "niceSourceList"
     * @param cmd the commandline args
     */
    protected void logAndAddFilesToCompile(Commandline cmd) {
        Vector compileList = attributes.getCompileList();

        attributes.log("Compilation " + cmd.describeArguments(),
                       Project.MSG_VERBOSE);

        StringBuffer niceSourceList = new StringBuffer("File");
        int cListSize = compileList.size();
        if (cListSize != 1) {
            niceSourceList.append("s");
        }
        niceSourceList.append(" to be compiled:");

        for (int i = 0; i < cListSize; i++) {
            String arg = (String) compileList.elementAt(i);
            cmd.createArgument().setValue(arg);
            niceSourceList.append("    ");
            niceSourceList.append(arg);
        }

        attributes.log(niceSourceList.toString(), Project.MSG_VERBOSE);
    }

    /**
     * Mapper that may return up to two file names.
     *
     * <ul>
     *   <li>for JRMP it will return *_getStubClassSuffix (and
     *   *_getSkelClassSuffix if JDK 1.1 is used)</li>
     *
     *   <li>for IDL it will return a random name, causing  to
     *     always recompile.</li>
     *
     *   <li>for IIOP it will return _*_getStubClassSuffix for
     *   interfaces and _*_getStubClassSuffix for non-interfaces (and
     *   determine the interface and create _*_Stub from that).</li>
     * </ul>
     */
    private class RmicFileNameMapper implements FileNameMapper {

        RmicFileNameMapper() {
        }

        /**
         * Empty implementation.
         */
        public void setFrom(String s) {
        }
        /**
         * Empty implementation.
         */
        public void setTo(String s) {
        }

        public String[] mapFileName(String name) {
            if (name == null
                || !name.endsWith(".class")
                || name.endsWith(getStubClassSuffix() + ".class")
                || name.endsWith(getSkelClassSuffix() + ".class")
                || name.endsWith(getTieClassSuffix() + ".class")) {
                // Not a .class file or the one we'd generate
                return null;
            }

            // we know that name.endsWith(".class")
            String base = name.substring(0, name.length() - 6);

            String classname = base.replace(File.separatorChar, '.');
            if (attributes.getVerify()
                && !attributes.isValidRmiRemote(classname)) {
                return null;
            }

            /*
             * fallback in case we have trouble loading the class or
             * don't know how to handle it (there is no easy way to
             * know what IDL mode would generate.
             *
             * This is supposed to make Ant always recompile the
             * class, as a file of that name should not exist.
             */
            String[] target = new String[] {name + ".tmp." + RAND.nextLong()};

            if (!attributes.getIiop() && !attributes.getIdl()) {
                // JRMP with simple naming convention
                if ("1.2".equals(attributes.getStubVersion())) {
                    target = new String[] {
                        base + getStubClassSuffix() + ".class"
                    };
                } else {
                    target = new String[] {
                        base + getStubClassSuffix() + ".class",
                        base + getSkelClassSuffix() + ".class",
                    };
                }
            } else if (!attributes.getIdl()) {
                int lastSlash = base.lastIndexOf(File.separatorChar);

                String dirname = "";
                /*
                 * I know, this is not necessary, but I prefer it explicit (SB)
                 */
                int index = -1;
                if (lastSlash == -1) {
                    // no package
                    index = 0;
                } else {
                    index = lastSlash + 1;
                    dirname = base.substring(0, index);
                }

                String filename = base.substring(index);

                try {
                    Class c = attributes.getLoader().loadClass(classname);

                    if (c.isInterface()) {
                        // only stub, no tie
                        target = new String[] {
                            dirname + "_" + filename + getStubClassSuffix()
                            + ".class"
                        };
                    } else {
                        /*
                         * stub is derived from implementation,
                         * tie from interface name.
                         */
                        Class interf = attributes.getRemoteInterface(c);
                        String iName = interf.getName();
                        String iDir = "";
                        int iIndex = -1;
                        int lastDot = iName.lastIndexOf(".");
                        if (lastDot == -1) {
                            // no package
                            iIndex = 0;
                        } else {
                            iIndex = lastDot + 1;
                            iDir = iName.substring(0, iIndex);
                            iDir = iDir.replace('.', File.separatorChar);
                        }

                        target = new String[] {
                            dirname + "_" + filename + getTieClassSuffix()
                            + ".class",
                            iDir + "_" + iName.substring(iIndex)
                            + getStubClassSuffix() + ".class"
                        };
                    }
                } catch (ClassNotFoundException e) {
                    attributes.log("Unable to verify class " + classname
                                   + ". It could not be found.",
                                   Project.MSG_WARN);
                } catch (NoClassDefFoundError e) {
                    attributes.log("Unable to verify class " + classname
                                   + ". It is not defined.", Project.MSG_WARN);
                } catch (Throwable t) {
                    attributes.log("Unable to verify class " + classname
                                   + ". Loading caused Exception: "
                                   + t.getMessage(), Project.MSG_WARN);
                }
            }
            return target;
        }
    }
}

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