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Ant example source code file (NetRexxC.java)

This example Ant source code file (NetRexxC.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, file, file, hashtable, io, ioexception, string, string, stringbuffer, stringbuffer, traceattr, util, vector, verboseattr, warning

The NetRexxC.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;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.Vector;
import netrexx.lang.Rexx;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.MatchingTask;
import org.apache.tools.ant.types.EnumeratedAttribute;
import org.apache.tools.ant.util.FileUtils;

/**
 * Compiles NetRexx source files.
 * This task can take the following
 * arguments:
 * <ul>
 * <li>binary
 * <li>classpath
 * <li>comments
 * <li>compile
 * <li>console
 * <li>crossref
 * <li>decimal
 * <li>destdir
 * <li>diag
 * <li>explicit
 * <li>format
 * <li>keep
 * <li>logo
 * <li>replace
 * <li>savelog
 * <li>srcdir
 * <li>sourcedir
 * <li>strictargs
 * <li>strictassign
 * <li>strictcase
 * <li>strictimport
 * <li>symbols
 * <li>time
 * <li>trace
 * <li>utf8
 * <li>verbose
 * <li>suppressMethodArgumentNotUsed
 * <li>suppressPrivatePropertyNotUsed
 * <li>suppressVariableNotUsed
 * <li>suppressExceptionNotSignalled
 * <li>suppressDeprecation
 * </ul>
 * Of these arguments, the <b>srcdir argument is required.
 *
 * <p>When this task executes, it will recursively scan the srcdir
 * looking for NetRexx source files to compile. This task makes its
 * compile decision based on timestamp.
 * <p>Before files are compiled they and any other file in the
 * srcdir will be copied to the destdir allowing support files to be
 * located properly in the classpath. The reason for copying the source files
 * before the compile is that NetRexxC has only two destinations for classfiles:
 * <ol>
 * <li>The current directory, and,
 * <li>The directory the source is in (see sourcedir option)
 * </ol>
 *
 */
public class NetRexxC extends MatchingTask {

    // variables to hold arguments
    private boolean binary;
    private String classpath;
    private boolean comments;
    private boolean compact = true; // should be the default, as it integrates better in ant.
    private boolean compile = true;
    private boolean console;
    private boolean crossref;
    private boolean decimal = true;
    private File destDir;
    private boolean diag;
    private boolean explicit;
    private boolean format;
    private boolean keep;
    private boolean logo = true;
    private boolean replace;
    private boolean savelog;
    private File srcDir;
    private boolean sourcedir = true; // ?? Should this be the default for ant?
    private boolean strictargs;
    private boolean strictassign;
    private boolean strictcase;
    private boolean strictimport;
    private boolean strictprops;
    private boolean strictsignal;
    private boolean symbols;
    private boolean time;
    private String trace = "trace2";
    private boolean utf8;
    private String verbose = "verbose3";
    private boolean suppressMethodArgumentNotUsed = false;
    private boolean suppressPrivatePropertyNotUsed = false;
    private boolean suppressVariableNotUsed = false;
    private boolean suppressExceptionNotSignalled = false;
    private boolean suppressDeprecation = false;

    // constants for the messages to suppress by flags and their corresponding properties
    static final String MSG_METHOD_ARGUMENT_NOT_USED
        = "Warning: Method argument is not used";
    static final String MSG_PRIVATE_PROPERTY_NOT_USED
        = "Warning: Private property is defined but not used";
    static final String MSG_VARIABLE_NOT_USED
        = "Warning: Variable is set but not used";
    static final String MSG_EXCEPTION_NOT_SIGNALLED
        = "is in SIGNALS list but is not signalled within the method";
    static final String MSG_DEPRECATION = "has been deprecated";

    // other implementation variables
    private Vector compileList = new Vector();
    private Hashtable filecopyList = new Hashtable();

    /**
     * Set whether literals are treated as binary, rather than NetRexx types.
     * @param binary a <code>boolean value.
     */
    public void setBinary(boolean binary) {
        this.binary = binary;
    }


    /**
     * Set the classpath used for NetRexx compilation.
     * @param classpath the classpath to use.
     */
    public void setClasspath(String classpath) {
        this.classpath = classpath;
    }


    /**
     * Set whether comments are passed through to the generated java source.
     * Valid true values are "on" or "true". Anything else sets the flag to
     * false. The default value is false
     * @param comments a <code>boolean value.
     */
    public void setComments(boolean comments) {
        this.comments = comments;
    }


    /**
     * Set whether error messages come out in compact or verbose format. Valid
     * true values are "on" or "true". Anything else sets the flag to false.
     * The default value is false
     * @param compact a <code>boolean value.
     */
    public void setCompact(boolean compact) {
        this.compact = compact;
    }


    /**
     * Set whether the NetRexx compiler should compile the generated java code
     * Valid true values are "on" or "true". Anything else sets the flag to
     * false. The default value is true. Setting this flag to false, will
     * automatically set the keep flag to true.
     * @param compile a <code>boolean value.
     */
    public void setCompile(boolean compile) {
        this.compile = compile;
        if (!this.compile && !this.keep) {
            this.keep = true;
        }
    }


    /**
     * Set whether or not messages should be displayed on the 'console' Valid
     * true values are "on" or "true". Anything else sets the flag to false.
     * The default value is true.
     * @param console a <code>boolean value.
     */
    public void setConsole(boolean console) {
        this.console = console;
    }


    /**
     * Whether variable cross references are generated.
     * @param crossref a <code>boolean value.
     */
    public void setCrossref(boolean crossref) {
        this.crossref = crossref;
    }


    /**
     * Set whether decimal arithmetic should be used for the netrexx code.
     * Binary arithmetic is used when this flag is turned off. Valid true
     * values are "on" or "true". Anything else sets the flag to false. The
     * default value is true.
     * @param decimal a <code>boolean value.
     */
    public void setDecimal(boolean decimal) {
        this.decimal = decimal;
    }


    /**
     * Set the destination directory into which the NetRexx source files
     * should be copied and then compiled.
     * @param destDirName the destination directory.
     */
    public void setDestDir(File destDirName) {
        destDir = destDirName;
    }


    /**
     * Whether diagnostic information about the compile is generated
     * @param diag a <code>boolean value.
     */
    public void setDiag(boolean diag) {
        this.diag = diag;
    }


    /**
     * Sets whether variables must be declared explicitly before use. Valid
     * true values are "on" or "true". Anything else sets the flag to false.
     * The default value is false.
     * @param explicit a <code>boolean value.
     */
    public void setExplicit(boolean explicit) {
        this.explicit = explicit;
    }


    /**
     * Whether the generated java code is formatted nicely or left to match
     * NetRexx line numbers for call stack debugging.
     * @param format a <code>boolean value.
     */
    public void setFormat(boolean format) {
        this.format = format;
    }


    /**
     * Whether the generated java code is produced Valid true values are "on"
     * or "true". Anything else sets the flag to false. The default value is
     * false.
     * @param java a <code>boolean value.
     */
    public void setJava(boolean java) {
        log("The attribute java is currently unused.", Project.MSG_WARN);
    }


    /**
     * Sets whether the generated java source file should be kept after
     * compilation. The generated files will have an extension of .java.keep,
     * <b>not .java Valid true values are "on" or "true". Anything else
     * sets the flag to false. The default value is false.
     * @param keep a <code>boolean value.
     */
    public void setKeep(boolean keep) {
        this.keep = keep;
    }


    /**
     * Whether the compiler text logo is displayed when compiling.
     * @param logo a <code>boolean value.
     */
    public void setLogo(boolean logo) {
        this.logo = logo;
    }


    /**
     * Whether the generated .java file should be replaced when compiling
     * Valid true values are "on" or "true". Anything else sets the flag to
     * false. The default value is false.
     * @param replace a <code>boolean value.
     */
    public void setReplace(boolean replace) {
        this.replace = replace;
    }


    /**
     * Sets whether the compiler messages will be written to NetRexxC.log as
     * well as to the console Valid true values are "on" or "true". Anything
     * else sets the flag to false. The default value is false.
     * @param savelog a <code>boolean value.
     */
    public void setSavelog(boolean savelog) {
        this.savelog = savelog;
    }


    /**
     * Tells the NetRexx compiler to store the class files in the same
     * directory as the source files. The alternative is the working directory
     * Valid true values are "on" or "true". Anything else sets the flag to
     * false. The default value is true.
     * @param sourcedir a <code>boolean value.
     */
    public void setSourcedir(boolean sourcedir) {
        this.sourcedir = sourcedir;
    }


    /**
     * Set the source dir to find the source Java files.
     * @param srcDirName the source directory.
     */
    public void setSrcDir(File srcDirName) {
        srcDir = srcDirName;
    }


    /**
     * Tells the NetRexx compiler that method calls always need parentheses,
     * even if no arguments are needed, e.g. <code>aStringVar.getBytes
     * vs. <code>aStringVar.getBytes() Valid true values are "on" or
     * "true". Anything else sets the flag to false. The default value is
     * false.
     * @param strictargs a <code>boolean value.
     */
    public void setStrictargs(boolean strictargs) {
        this.strictargs = strictargs;
    }


    /**
     * Tells the NetRexx compile that assignments must match exactly on type.
     * @param strictassign a <code>boolean value.
     */
    public void setStrictassign(boolean strictassign) {
        this.strictassign = strictassign;
    }


    /**
     * Specifies whether the NetRexx compiler should be case sensitive or not.
     * @param strictcase a <code>boolean value.
     */
    public void setStrictcase(boolean strictcase) {
        this.strictcase = strictcase;
    }


    /**
     * Sets whether classes need to be imported explicitly using an <code>import
     * statement. By default the NetRexx compiler will import certain packages
     * automatically Valid true values are "on" or "true". Anything else sets
     * the flag to false. The default value is false.
     * @param strictimport a <code>boolean value.
     */
    public void setStrictimport(boolean strictimport) {
        this.strictimport = strictimport;
    }


    /**
     * Sets whether local properties need to be qualified explicitly using
     * <code>this Valid true values are "on" or "true". Anything else
     * sets the flag to false. The default value is false.
     * @param strictprops a <code>boolean value.
     */
    public void setStrictprops(boolean strictprops) {
        this.strictprops = strictprops;
    }


    /**
     * Whether the compiler should force catching of exceptions by explicitly
     * named types.
     * @param strictsignal a <code>boolean value.
     */
    public void setStrictsignal(boolean strictsignal) {
        this.strictsignal = strictsignal;
    }


    /**
     * Sets whether debug symbols should be generated into the class file
     * Valid true values are "on" or "true". Anything else sets the flag to
     * false. The default value is false.
     * @param symbols a <code>boolean value.
     */
    public void setSymbols(boolean symbols) {
        this.symbols = symbols;
    }


    /**
     * Asks the NetRexx compiler to print compilation times to the console
     * Valid true values are "on" or "true". Anything else sets the flag to
     * false. The default value is false.
     * @param time a <code>boolean value.
     */
    public void setTime(boolean time) {
        this.time = time;
    }

    /**
     * Turns on or off tracing and directs the resultant trace output Valid
     * values are: "trace", "trace1", "trace2" and "notrace". "trace" and
     * "trace2".
     * @param trace the value to set.
     */
    public void setTrace(TraceAttr trace) {
        this.trace = trace.getValue();
    }

    /**
     * Turns on or off tracing and directs the resultant trace output Valid
     * values are: "trace", "trace1", "trace2" and "notrace". "trace" and
     * "trace2".
     * @param trace the value to set.
     */
    public void setTrace(String trace) {
        TraceAttr t = new TraceAttr();

        t.setValue(trace);
        setTrace(t);
    }


    /**
     * Tells the NetRexx compiler that the source is in UTF8 Valid true values
     * are "on" or "true". Anything else sets the flag to false. The default
     * value is false.
     * @param utf8 a <code>boolean value.
     */
    public void setUtf8(boolean utf8) {
        this.utf8 = utf8;
    }


    /**
     * Whether lots of warnings and error messages should be generated
     * @param verbose the value to set - verbose<level> or noverbose.
     */
    public void setVerbose(VerboseAttr verbose) {
        this.verbose = verbose.getValue();
    }


    /**
     * Whether lots of warnings and error messages should be generated
     * @param verbose the value to set - verbose<level> or noverbose.
     */
    public void setVerbose(String verbose) {
        VerboseAttr v = new VerboseAttr();

        v.setValue(verbose);
        setVerbose(v);
    }

    /**
     * Whether the task should suppress the "Method argument is not used" in
     * strictargs-Mode, which can not be suppressed by the compiler itself.
     * The warning is logged as verbose message, though.
     * @param suppressMethodArgumentNotUsed a <code>boolean value.
     */
    public void setSuppressMethodArgumentNotUsed(boolean suppressMethodArgumentNotUsed) {
        this.suppressMethodArgumentNotUsed = suppressMethodArgumentNotUsed;
    }


    /**
     * Whether the task should suppress the "Private property is defined but
     * not used" in strictargs-Mode, which can be quite annoying while
     * developing. The warning is logged as verbose message, though.
     * @param suppressPrivatePropertyNotUsed a <code>boolean value.
     */
    public void setSuppressPrivatePropertyNotUsed(boolean suppressPrivatePropertyNotUsed) {
        this.suppressPrivatePropertyNotUsed = suppressPrivatePropertyNotUsed;
    }


    /**
     * Whether the task should suppress the "Variable is set but not used" in
     * strictargs-Mode. Be careful with this one! The warning is logged as
     * verbose message, though.
     * @param suppressVariableNotUsed a <code>boolean value.
     */
    public void setSuppressVariableNotUsed(boolean suppressVariableNotUsed) {
        this.suppressVariableNotUsed = suppressVariableNotUsed;
    }


    /**
     * Whether the task should suppress the "FooException is in SIGNALS list
     * but is not signalled within the method", which is sometimes rather
     * useless. The warning is logged as verbose message, though.
     * @param suppressExceptionNotSignalled a <code>boolean value.
     */
    public void setSuppressExceptionNotSignalled(boolean suppressExceptionNotSignalled) {
        this.suppressExceptionNotSignalled = suppressExceptionNotSignalled;
    }


    /**
     * Tells whether we should filter out any deprecation-messages
     * of the compiler out.
     * @param suppressDeprecation a <code>boolean value.
     */
    public void setSuppressDeprecation(boolean suppressDeprecation) {
        this.suppressDeprecation = suppressDeprecation;
    }


    /**
     * init-Method sets defaults from Properties. That way, when ant is called
     * with arguments like -Dant.netrexxc.verbose=verbose5 one can easily take
     * control of all netrexxc-tasks.
     */
    public void init() {
        String p;

        if ((p = getProject().getProperty("ant.netrexxc.binary")) != null) {
            this.binary = Project.toBoolean(p);
        }
        // classpath makes no sense
        if ((p = getProject().getProperty("ant.netrexxc.comments")) != null) {
            this.comments = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.compact")) != null) {
            this.compact = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.compile")) != null) {
            this.compile = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.console")) != null) {
            this.console = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.crossref")) != null) {
            this.crossref = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.decimal")) != null) {
            this.decimal = Project.toBoolean(p);
            // destDir
        }
        if ((p = getProject().getProperty("ant.netrexxc.diag")) != null) {
            this.diag = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.explicit")) != null) {
            this.explicit = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.format")) != null) {
            this.format = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.keep")) != null) {
            this.keep = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.logo")) != null) {
            this.logo = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.replace")) != null) {
            this.replace = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.savelog")) != null) {
            this.savelog = Project.toBoolean(p);
            // srcDir
        }
        if ((p = getProject().getProperty("ant.netrexxc.sourcedir")) != null) {
            this.sourcedir = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.strictargs")) != null) {
            this.strictargs = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.strictassign")) != null) {
            this.strictassign = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.strictcase")) != null) {
            this.strictcase = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.strictimport")) != null) {
            this.strictimport = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.strictprops")) != null) {
            this.strictprops = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.strictsignal")) != null) {
            this.strictsignal = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.symbols")) != null) {
            this.symbols = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.time")) != null) {
            this.time = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.trace")) != null) {
            setTrace(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.utf8")) != null) {
            this.utf8 = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.verbose")) != null) {
            setVerbose(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.suppressMethodArgumentNotUsed")) != null) {
            this.suppressMethodArgumentNotUsed = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.suppressPrivatePropertyNotUsed")) != null) {
            this.suppressPrivatePropertyNotUsed = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.suppressVariableNotUsed")) != null) {
            this.suppressVariableNotUsed = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.suppressExceptionNotSignalled")) != null) {
            this.suppressExceptionNotSignalled = Project.toBoolean(p);
        }
        if ((p = getProject().getProperty("ant.netrexxc.suppressDeprecation")) != null) {
            this.suppressDeprecation = Project.toBoolean(p);
        }
    }


    /**
     * Executes the task - performs the actual compiler call.
     * @throws BuildException on error.
     */
    public void execute() throws BuildException {

        // first off, make sure that we've got a srcdir and destdir
        if (srcDir == null || destDir == null) {
            throw new BuildException("srcDir and destDir attributes must be set!");
        }

        // scan source and dest dirs to build up both copy lists and
        // compile lists
        //        scanDir(srcDir, destDir);
        DirectoryScanner ds = getDirectoryScanner(srcDir);

        String[] files = ds.getIncludedFiles();

        scanDir(srcDir, destDir, files);

        // copy the source and support files
        copyFilesToDestination();

        // compile the source files
        if (compileList.size() > 0) {
            log("Compiling " + compileList.size() + " source file"
                 + (compileList.size() == 1 ? "" : "s")
                 + " to " + destDir);
            doNetRexxCompile();
        }
    }


    /**
     * Scans the directory looking for source files to be compiled and support
     * files to be copied.
     */
    private void scanDir(File srcDir, File destDir, String[] files) {
        for (int i = 0; i < files.length; i++) {
            File srcFile = new File(srcDir, files[i]);
            File destFile = new File(destDir, files[i]);
            String filename = files[i];
            // if it's a non source file, copy it if a later date than the
            // dest
            // if it's a source file, see if the destination class file
            // needs to be recreated via compilation
            if (filename.toLowerCase().endsWith(".nrx")) {
                File classFile =
                    new File(destDir,
                    filename.substring(0, filename.lastIndexOf('.')) + ".class");

                if (!compile || srcFile.lastModified() > classFile.lastModified()) {
                    filecopyList.put(srcFile.getAbsolutePath(), destFile.getAbsolutePath());
                    compileList.addElement(destFile.getAbsolutePath());
                }
            } else {
                if (srcFile.lastModified() > destFile.lastModified()) {
                    filecopyList.put(srcFile.getAbsolutePath(), destFile.getAbsolutePath());
                }
            }
        }
    }


    /** Copy eligible files from the srcDir to destDir  */
    private void copyFilesToDestination() {
        if (filecopyList.size() > 0) {
            log("Copying " + filecopyList.size() + " file"
                 + (filecopyList.size() == 1 ? "" : "s")
                 + " to " + destDir.getAbsolutePath());

            Enumeration e = filecopyList.keys();

            while (e.hasMoreElements()) {
                String fromFile = (String) e.nextElement();
                String toFile = (String) filecopyList.get(fromFile);

                try {
                    FileUtils.getFileUtils().copyFile(fromFile, toFile);
                } catch (IOException ioe) {
                    String msg = "Failed to copy " + fromFile + " to " + toFile
                         + " due to " + ioe.getMessage();

                    throw new BuildException(msg, ioe);
                }
            }
        }
    }


    /** Performs a compile using the NetRexx 1.1.x compiler  */
    private void doNetRexxCompile() throws BuildException {
        log("Using NetRexx compiler", Project.MSG_VERBOSE);

        String classpath = getCompileClasspath();
        StringBuffer compileOptions = new StringBuffer();

        // create an array of strings for input to the compiler: one array
        // comes from the compile options, the other from the compileList
        String[] compileOptionsArray = getCompileOptionsAsArray();
        String[] fileListArray = new String[compileList.size()];
        Enumeration e = compileList.elements();
        int j = 0;

        while (e.hasMoreElements()) {
            fileListArray[j] = (String) e.nextElement();
            j++;
        }
        // create a single array of arguments for the compiler
        String[] compileArgs = new String[compileOptionsArray.length + fileListArray.length];

        for (int i = 0; i < compileOptionsArray.length; i++) {
            compileArgs[i] = compileOptionsArray[i];
        }
        for (int i = 0; i < fileListArray.length; i++) {
            compileArgs[i + compileOptionsArray.length] = fileListArray[i];
        }

        // print nice output about what we are doing for the log
        compileOptions.append("Compilation args: ");
        for (int i = 0; i < compileOptionsArray.length; i++) {
            compileOptions.append(compileOptionsArray[i]);
            compileOptions.append(" ");
        }
        log(compileOptions.toString(), Project.MSG_VERBOSE);

        String eol = System.getProperty("line.separator");
        StringBuffer niceSourceList = new StringBuffer("Files to be compiled:" + eol);

        for (int i = 0; i < compileList.size(); i++) {
            niceSourceList.append("    ");
            niceSourceList.append(compileList.elementAt(i).toString());
            niceSourceList.append(eol);
        }

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

        // need to set java.class.path property and restore it later
        // since the NetRexx compiler has no option for the classpath
        String currentClassPath = System.getProperty("java.class.path");
        Properties currentProperties = System.getProperties();

        currentProperties.put("java.class.path", classpath);

        try {
            StringWriter out = new StringWriter();
            int rc =
                COM.ibm.netrexx.process.NetRexxC.main(new Rexx(compileArgs), new PrintWriter(out));
            String sdir = srcDir.getAbsolutePath();
            String ddir = destDir.getAbsolutePath();
            boolean doReplace = !(sdir.equals(ddir));
            int dlen = ddir.length();
            String l;
            BufferedReader in = new BufferedReader(new StringReader(out.toString()));

            log("replacing destdir '" + ddir + "' through sourcedir '"
                + sdir + "'", Project.MSG_VERBOSE);
            while ((l = in.readLine()) != null) {
                int idx;

                while (doReplace && ((idx = l.indexOf(ddir)) != -1)) {
                    // path is mentioned in the message
                    l = (new StringBuffer(l)).replace(idx, idx + dlen, sdir).toString();
                }
                // verbose level logging for suppressed messages
                if (suppressMethodArgumentNotUsed
                    && l.indexOf(MSG_METHOD_ARGUMENT_NOT_USED) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (suppressPrivatePropertyNotUsed
                    && l.indexOf(MSG_PRIVATE_PROPERTY_NOT_USED) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (suppressVariableNotUsed
                    && l.indexOf(MSG_VARIABLE_NOT_USED) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (suppressExceptionNotSignalled
                    && l.indexOf(MSG_EXCEPTION_NOT_SIGNALLED) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (suppressDeprecation
                    && l.indexOf(MSG_DEPRECATION) != -1) {
                    log(l, Project.MSG_VERBOSE);
                } else if (l.indexOf("Error:") != -1) {
                    // error level logging for compiler errors
                    log(l, Project.MSG_ERR);
                } else if (l.indexOf("Warning:") != -1) {
                    // warning for all warning messages
                    log(l, Project.MSG_WARN);
                } else {
                    log(l, Project.MSG_INFO); // info level for the rest.
                }
            }
            if (rc > 1) {
                throw new BuildException("Compile failed, messages should "
                    + "have been provided.");
            }
        } catch (IOException ioe) {
            throw new BuildException("Unexpected IOException while "
                + "playing with Strings", ioe);
        } finally {
            // need to reset java.class.path property
            // since the NetRexx compiler has no option for the classpath
            currentProperties = System.getProperties();
            currentProperties.put("java.class.path", currentClassPath);
        }

    }


    /** Builds the compilation classpath.  */
    private String getCompileClasspath() {
        StringBuffer classpath = new StringBuffer();

        // add dest dir to classpath so that previously compiled and
        // untouched classes are on classpath
        classpath.append(destDir.getAbsolutePath());

        // add our classpath to the mix
        if (this.classpath != null) {
            addExistingToClasspath(classpath, this.classpath);
        }

        // add the system classpath
        // addExistingToClasspath(classpath,System.getProperty("java.class.path"));
        return classpath.toString();
    }


    /** This  */
    private String[] getCompileOptionsAsArray() {
        Vector options = new Vector();

        options.addElement(binary ? "-binary" : "-nobinary");
        options.addElement(comments ? "-comments" : "-nocomments");
        options.addElement(compile ? "-compile" : "-nocompile");
        options.addElement(compact ? "-compact" : "-nocompact");
        options.addElement(console ? "-console" : "-noconsole");
        options.addElement(crossref ? "-crossref" : "-nocrossref");
        options.addElement(decimal ? "-decimal" : "-nodecimal");
        options.addElement(diag ? "-diag" : "-nodiag");
        options.addElement(explicit ? "-explicit" : "-noexplicit");
        options.addElement(format ? "-format" : "-noformat");
        options.addElement(keep ? "-keep" : "-nokeep");
        options.addElement(logo ? "-logo" : "-nologo");
        options.addElement(replace ? "-replace" : "-noreplace");
        options.addElement(savelog ? "-savelog" : "-nosavelog");
        options.addElement(sourcedir ? "-sourcedir" : "-nosourcedir");
        options.addElement(strictargs ? "-strictargs" : "-nostrictargs");
        options.addElement(strictassign ? "-strictassign" : "-nostrictassign");
        options.addElement(strictcase ? "-strictcase" : "-nostrictcase");
        options.addElement(strictimport ? "-strictimport" : "-nostrictimport");
        options.addElement(strictprops ? "-strictprops" : "-nostrictprops");
        options.addElement(strictsignal ? "-strictsignal" : "-nostrictsignal");
        options.addElement(symbols ? "-symbols" : "-nosymbols");
        options.addElement(time ? "-time" : "-notime");
        options.addElement("-" + trace);
        options.addElement(utf8 ? "-utf8" : "-noutf8");
        options.addElement("-" + verbose);

        String[] results = new String[options.size()];

        options.copyInto(results);
        return results;
    }


    /**
     * Takes a classpath-like string, and adds each element of this string to
     * a new classpath, if the components exist. Components that don't exist,
     * aren't added. We do this, because jikes issues warnings for
     * non-existant files/dirs in his classpath, and these warnings are pretty
     * annoying.
     *
     * @param target - target classpath
     * @param source - source classpath to get file objects.
     */
    private void addExistingToClasspath(StringBuffer target, String source) {
        StringTokenizer tok = new StringTokenizer(source,
            System.getProperty("path.separator"), false);

        while (tok.hasMoreTokens()) {
            File f = getProject().resolveFile(tok.nextToken());

            if (f.exists()) {
                target.append(File.pathSeparator);
                target.append(f.getAbsolutePath());
            } else {
                log("Dropping from classpath: "
                    + f.getAbsolutePath(), Project.MSG_VERBOSE);
            }
        }

    }


    /**
     * Enumerated class corresponding to the trace attribute.
     */
    public static class TraceAttr extends EnumeratedAttribute {
        /** {@inheritDoc}. */
        public String[] getValues() {
            return new String[]{"trace", "trace1", "trace2", "notrace"};
        }
    }

    /**
     * Enumerated class corresponding to the verbose attribute.
     */
    public static class VerboseAttr extends EnumeratedAttribute {
        /** {@inheritDoc}. */
        public String[] getValues() {
            return new String[]{"verbose", "verbose0", "verbose1",
                "verbose2", "verbose3", "verbose4",
                "verbose5", "noverbose"};
        }
    }
}

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