iplanetejbc.java

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         * implementation) and returns the modification timestamp for the
         * "oldest" class.
         *
         * @param classpath The classpath to be used to find the source EJB
         *                  classes.  If <code>null</code>, the system classpath
         *                  is used.
         * @return The modification timestamp for the "oldest" EJB source class.
         * @throws BuildException If one of the EJB source classes cannot be
         *                        found on the classpath.
         */
        private long sourceClassesModified(File buildDir) {
            long latestModified; // The timestamp of the "newest" class
            long modified;       // Timestamp for a given class
            File remoteFile;     // File for the remote interface class
            File homeFile;       // File for the home interface class
            File implFile;       // File for the EJB implementation class
            File pkFile;         // File for the EJB primary key class

            /* Check the timestamp on the remote interface */
            remoteFile = remote.getClassFile(buildDir);
            modified = remoteFile.lastModified();
            if (modified == -1) {
                System.out.println("The class "
                                + remote.getQualifiedClassName() + " couldn't "
                                + "be found on the classpath");
                return -1;
            }
            latestModified = modified;

            /* Check the timestamp on the home interface */
            homeFile = home.getClassFile(buildDir);
            modified = homeFile.lastModified();
            if (modified == -1) {
                System.out.println("The class "
                                + home.getQualifiedClassName() + " couldn't be "
                                + "found on the classpath");
                return -1;
            }
            latestModified = Math.max(latestModified, modified);

            /* Check the timestamp of the primary key class */
            if (primaryKey != null) {
                pkFile = primaryKey.getClassFile(buildDir);
                modified = pkFile.lastModified();
                if (modified == -1) {
                    System.out.println("The class "
                                    + primaryKey.getQualifiedClassName() + "couldn't be "
                                    + "found on the classpath");
                    return -1;
                }
                latestModified = Math.max(latestModified, modified);
            } else {
                pkFile = null;
            }

            /* Check the timestamp on the EJB implementation class.
             *
             * Note that if ONLY the implementation class has changed, it's not
             * necessary to rebuild the EJB stubs and skeletons.  For this
             * reason, we ensure the file exists (using lastModified above), but
             * we DON'T compare it's timestamp with the timestamps of the home
             * and remote interfaces (because it's irrelevant in determining if
             * ejbc must be run)
             */
            implFile = implementation.getClassFile(buildDir);
            modified = implFile.lastModified();
            if (modified == -1) {
                System.out.println("The class "
                                + implementation.getQualifiedClassName()
                                + " couldn't be found on the classpath");
                return -1;
            }

            String pathToFile = remote.getQualifiedClassName();
            pathToFile = pathToFile.replace('.', File.separatorChar) + ".class";
            ejbFiles.put(pathToFile, remoteFile);

            pathToFile = home.getQualifiedClassName();
            pathToFile = pathToFile.replace('.', File.separatorChar) + ".class";
            ejbFiles.put(pathToFile, homeFile);

            pathToFile = implementation.getQualifiedClassName();
            pathToFile = pathToFile.replace('.', File.separatorChar) + ".class";
            ejbFiles.put(pathToFile, implFile);

            if (pkFile != null) {
                pathToFile = primaryKey.getQualifiedClassName();
                pathToFile = pathToFile.replace('.', File.separatorChar) + ".class";
                ejbFiles.put(pathToFile, pkFile);
            }

            return latestModified;
        }

        /**
         * Examines each of the EJB stubs and skeletons in the destination
         * directory and returns the modification timestamp for the "oldest"
         * class. If one of the stubs or skeletons cannot be found, <code>-1
         * </code> is returned.
         *
         * @param dest The directory in which the EJB stubs and skeletons are
         *             stored.
         * @return The modification timestamp for the "oldest" EJB stub or
         *         skeleton.  If one of the classes cannot be found, <code>-1
         *         </code> is returned.
         * @throws BuildException If the canonical path of the destination
         *                        directory cannot be found.
         */
        private long destClassesModified(File destDir) {
            String[] classnames = classesToGenerate(); // List of all stubs & skels
            long destClassesModified = new Date().getTime(); // Earliest mod time
            boolean allClassesFound  = true;           // Has each been found?

            /*
             * Loop through each stub/skeleton class that must be generated, and
             * determine (if all exist) which file has the most recent timestamp
             */
            for (int i = 0; i < classnames.length; i++) {

                String pathToClass =
                        classnames[i].replace('.', File.separatorChar) + ".class";
                File classFile = new File(destDir, pathToClass);

                /*
                 * Add each stub/skeleton class to the list of EJB files.  Note
                 * that each class is added even if it doesn't exist now.
                 */
                ejbFiles.put(pathToClass, classFile);

                allClassesFound = allClassesFound && classFile.exists();

                if (allClassesFound) {
                    long fileMod = classFile.lastModified();

                    /* Keep track of the oldest modification timestamp */
                    destClassesModified = Math.min(destClassesModified, fileMod);
                }
            }

            return (allClassesFound) ? destClassesModified : -1;
        }

        /**
         * Builds an array of class names which represent the stubs and
         * skeletons which need to be generated for a given EJB.  The class
         * names are fully qualified.  Nine classes are generated for all EJBs
         * while an additional six classes are generated for beans requiring
         * RMI/IIOP access.
         *
         * @return An array of Strings representing the fully-qualified class
         *         names for the stubs and skeletons to be generated.
         */
        private String[] classesToGenerate() {
            String[] classnames = (iiop)
                ? new String[NUM_CLASSES_WITH_IIOP]
                : new String[NUM_CLASSES_WITHOUT_IIOP];

            final String remotePkg     = remote.getPackageName() + ".";
            final String remoteClass   = remote.getClassName();
            final String homePkg       = home.getPackageName() + ".";
            final String homeClass     = home.getClassName();
            final String implPkg       = implementation.getPackageName() + ".";
            final String implFullClass = implementation.getQualifiedWithUnderscores();
            int index = 0;

            classnames[index++] = implPkg + "ejb_fac_" + implFullClass;
            classnames[index++] = implPkg + "ejb_home_" + implFullClass;
            classnames[index++] = implPkg + "ejb_skel_" + implFullClass;
            classnames[index++] = remotePkg + "ejb_kcp_skel_" + remoteClass;
            classnames[index++] = homePkg + "ejb_kcp_skel_" + homeClass;
            classnames[index++] = remotePkg + "ejb_kcp_stub_" + remoteClass;
            classnames[index++] = homePkg + "ejb_kcp_stub_" + homeClass;
            classnames[index++] = remotePkg + "ejb_stub_" + remoteClass;
            classnames[index++] = homePkg + "ejb_stub_" + homeClass;

            if (!iiop) {
                return classnames;
            }

            classnames[index++] = "org.omg.stub." + remotePkg + "_"
                                    + remoteClass + "_Stub";
            classnames[index++] = "org.omg.stub." + homePkg + "_"
                                    + homeClass + "_Stub";
            classnames[index++] = "org.omg.stub." + remotePkg
                                    + "_ejb_RmiCorbaBridge_"
                                    + remoteClass + "_Tie";
            classnames[index++] = "org.omg.stub." + homePkg
                                    + "_ejb_RmiCorbaBridge_"
                                    + homeClass + "_Tie";

            classnames[index++] = remotePkg + "ejb_RmiCorbaBridge_"
                                                        + remoteClass;
            classnames[index++] = homePkg + "ejb_RmiCorbaBridge_" + homeClass;

            return classnames;
        }

        /**
         * Convenience method which creates a String representation of all the
         * instance variables of an EjbInfo object.
         *
         * @return A String representing the EjbInfo instance.
         */
        public String toString() {
            String s = "EJB name: " + name
                        + "\n\r              home:      " + home
                        + "\n\r              remote:    " + remote
                        + "\n\r              impl:      " + implementation
                        + "\n\r              primaryKey: " + primaryKey
                        + "\n\r              beantype:  " + beantype
                        + "\n\r              cmp:       " + cmp
                        + "\n\r              iiop:      " + iiop
                        + "\n\r              hasession: " + hasession;

            Iterator i = cmpDescriptors.iterator();
            while (i.hasNext()) {
                s += "\n\r              CMP Descriptor: " + i.next();
            }

            return s;
        }

    } // End of EjbInfo inner class

    /**
     * Convenience class used to represent the fully qualified name of a Java
     * class.  It provides an easy way to retrieve components of the class name
     * in a format that is convenient for building iAS stubs and skeletons.
     *
     */
    private static class Classname {
        private String qualifiedName;  // Fully qualified name of the Java class
        private String packageName;    // Name of the package for this class
        private String className;      // Name of the class without the package

        /**
         * This constructor builds an object which represents the name of a Java
         * class.
         *
         * @param qualifiedName String representing the fully qualified class
         *                      name of the Java class.
         */
        public Classname(String qualifiedName) {
            if (qualifiedName == null) {
                return;
            }

            this.qualifiedName = qualifiedName;

            int index = qualifiedName.lastIndexOf('.');
            if (index == -1) {
                className = qualifiedName;
                packageName = "";
            } else {
                packageName = qualifiedName.substring(0, index);
                className   = qualifiedName.substring(index + 1);
            }
        }

        /**
         * Gets the fully qualified name of the Java class.
         *
         * @return String representing the fully qualified class name.
         */
        public String getQualifiedClassName() {
            return qualifiedName;
        }

        /**
         * Gets the package name for the Java class.
         *
         * @return String representing the package name for the class.
         */
        public String getPackageName() {
            return packageName;
        }

        /**
         * Gets the Java class name without the package structure.
         *
         * @return String representing the name for the class.
         */
        public String getClassName() {
            return className;
        }

        /**
         * Gets the fully qualified name of the Java class with underscores
         * separating the components of the class name rather than periods.
         * This format is used in naming some of the stub and skeleton classes
         * for the iPlanet Application Server.
         *
         * @return String representing the fully qualified class name using
         *         underscores instead of periods.
         */
        public String getQualifiedWithUnderscores() {
            return qualifiedName.replace('.', '_');
        }

        /**
         * Returns a File which references the class relative to the specified
         * directory.  Note that the class file may or may not exist.
         *
         * @param  directory A File referencing the base directory containing
         *                   class files.
         * @return File referencing this class.
         */
        public File getClassFile(File directory) {
            String pathToFile = qualifiedName.replace('.', File.separatorChar)
                                            + ".class";
            return new File(directory, pathToFile);
        }

        /**
         * String representation of this class name.  It returns the fully
         * qualified class name.
         *
         * @return String representing the fully qualified class name.
         */
        public String toString() {
            return getQualifiedClassName();
        }
    }  // End of Classname inner class


    /**
     * Thread class used to redirect output from an <code>InputStream</code> to
     * the JRE standard output.  This class may be used to redirect output from
     * an external process to the standard output.
     *
     */
    private static class RedirectOutput extends Thread {

        private InputStream stream;  // Stream to read and redirect to standard output

        /**
         * Constructs a new instance that will redirect output from the
         * specified stream to the standard output.
         *
         * @param stream InputStream which will be read and redirected to the
         *               standard output.
         */
        public RedirectOutput(InputStream stream) {
            this.stream = stream;
        }

        /**
         * Reads text from the input stream and redirects it to standard output
         * using a separate thread.
         */
        public void run() {
            BufferedReader reader = new BufferedReader(
                                            new InputStreamReader(stream));
            String text;
            try {
                while ((text = reader.readLine()) != null) {
                    System.out.println(text);
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    reader.close();
                } catch (IOException e) {
                    // Do nothing
                }
            }
        }
    }  // End of RedirectOutput inner class

}