Groovy example source code file (GenerateTestCases.java)

This example Groovy source code file (GenerateTestCases.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 - Groovy tags/keywords

batchgenerate, buildexception, buildexception, file, file, generatetestcases, globpatternmapper, io, path, path, sourcefilescanner, string, string, stringwriter, tests

The Groovy GenerateTestCases.java source code

/**
 * @author Jeremy Rayner
 */
package org.codehaus.groovy.tck;

import java.io.*;
import java.nio.charset.Charset;

import org.apache.tools.ant.*;
import org.apache.tools.ant.taskdefs.MatchingTask;
import org.apache.tools.ant.types.*;
import org.apache.tools.ant.util.*;

/**
 * Generates test files. This task can take the following
 * arguments:
 * <ul>
 * <li>sourcedir
 * <li>destdir
 * </ul>
 * Both are required.
 * <p>
 * When this task executes, it will recursively scan the sourcedir
 * looking for source files to expand into testcases. This task makes its
 * generation decision based on timestamp.
 *
 * Based heavily on the Javac implementation in Ant
 *
 * @author <a href="mailto:jeremy.rayner@bigfoot.com">Jeremy Rayner
 * @version $Revision: 2599 $
 */
public class GenerateTestCases extends MatchingTask {

    private BatchGenerate batchGenerate = new BatchGenerate();
    private Path src;
    private File destDir;
    private Path compileClasspath;
    private Path compileSourcepath;
    private String encoding;

    protected boolean failOnError = true;
    protected boolean listFiles = false;
    protected File[] compileList = new File[0];

    public GenerateTestCases() {
    }

    /**
     * Adds a path for source compilation.
     *
     * @return a nested src element.
     */
    public Path createSrc() {
        if (src == null) {
            src = new Path(getProject());
        }
        return src.createPath();
    }

    /**
     * Recreate src.
     *
     * @return a nested src element.
     */
    protected Path recreateSrc() {
        src = null;
        return createSrc();
    }

    /**
     * Set the source directories to find the source Java files.
     * @param srcDir the source directories as a path
     */
    public void setSrcdir(Path srcDir) {
        if (src == null) {
            src = srcDir;
        }
        else {
            src.append(srcDir);
        }
        batchGenerate.setSrcdirPath(src.toString());
    }

    /**
     * Gets the source dirs to find the source java files.
     * @return the source directorys as a path
     */
    public Path getSrcdir() {
        return src;
    }

    /**
     * Set the destination directory into which the Java source
     * files should be compiled.
     * @param destDir the destination director
     */
    public void setDestdir(File destDir) {
        this.destDir = destDir;
    }

    /**
     * Enable verbose compiling which will display which files
     * are being compiled
     * @param verbose
     */
    public void setVerbose(boolean verbose) {
        batchGenerate.setVerbose( verbose );
    }

    /**
     * Gets the destination directory into which the java source files
     * should be compiled.
     * @return the destination directory
     */
    public File getDestdir() {
        return destDir;
    }

    /**
     * Set the sourcepath to be used for this compilation.
     * @param sourcepath the source path
     */
    public void setSourcepath(Path sourcepath) {
        if (compileSourcepath == null) {
            compileSourcepath = sourcepath;
        }
        else {
            compileSourcepath.append(sourcepath);
        }
    }

    /**
     * Gets the sourcepath to be used for this compilation.
     * @return the source path
     */
    public Path getSourcepath() {
        return compileSourcepath;
    }

    /**
     * Adds a path to sourcepath.
     * @return a sourcepath to be configured
     */
    public Path createSourcepath() {
        if (compileSourcepath == null) {
            compileSourcepath = new Path(getProject());
        }
        return compileSourcepath.createPath();
    }

    /**
     * Adds a reference to a source path defined elsewhere.
     * @param r a reference to a source path
     */
    public void setSourcepathRef(Reference r) {
        createSourcepath().setRefid(r);
    }

    /**
     * Set the classpath to be used for this compilation.
     *
     * @param classpath an Ant Path object containing the compilation classpath.
     */
    public void setClasspath(Path classpath) {
        if (compileClasspath == null) {
            compileClasspath = classpath;
        }
        else {
            compileClasspath.append(classpath);
        }
    }

    /**
     * Gets the classpath to be used for this compilation.
     * @return the class path
     */
    public Path getClasspath() {
        return compileClasspath;
    }

    /**
     * Adds a path to the classpath.
     * @return a class path to be configured
     */
    public Path createClasspath() {
        if (compileClasspath == null) {
            compileClasspath = new Path(getProject());
        }
        return compileClasspath.createPath();
    }

    /**
     * Adds a reference to a classpath defined elsewhere.
     * @param r a reference to a classpath
     */
    public void setClasspathRef(Reference r) {
        createClasspath().setRefid(r);
    }

    public String createEncoding() {
        if (encoding == null) {
            encoding = System.getProperty("file.encoding");
        }
        return encoding;
    }

    public void setEncoding(String encoding) {
        this.encoding = encoding;
    }

    public String getEncoding() {
        return encoding;
    }

    /**
     * If true, list the source files being handed off to the compiler.
     * @param list if true list the source files
     */
    public void setListfiles(boolean list) {
        listFiles = list;
    }

    /**
     * Get the listfiles flag.
     * @return the listfiles flag
     */
    public boolean getListfiles() {
        return listFiles;
    }

    /**
     * Indicates whether the build will continue
     * even if there are compilation errors; defaults to true.
     * @param fail if true halt the build on failure
     */
    public void setFailonerror(boolean fail) {
        failOnError = fail;
    }

    /**
     * @param proceed inverse of failoferror
     */
    public void setProceed(boolean proceed) {
        failOnError = !proceed;
    }

    /**
     * Gets the failonerror flag.
     * @return the failonerror flag
     */
    public boolean getFailonerror() {
        return failOnError;
    }

    /**
     * Executes the task.
     * @exception BuildException if an error occurs
     */
    public void execute() throws BuildException {
        checkParameters();
        resetFileLists();

        // scan source directories and dest directory to build up
        // compile lists
        String[] list = src.list();
        for (int i = 0; i < list.length; i++) {
            File srcDir = getProject().resolveFile(list[i]);
            if (!srcDir.exists()) {
                throw new BuildException("srcdir \"" + srcDir.getPath() + "\" does not exist!", getLocation());
            }

            DirectoryScanner ds = this.getDirectoryScanner(srcDir);
            String[] files = ds.getIncludedFiles();

            scanDir(srcDir, destDir != null ? destDir : srcDir, files);
        }

        compile();
    }

    /**
     * Clear the list of files to be compiled and copied..
     */
    protected void resetFileLists() {
        compileList = new File[0];
    }

    /**
     * Scans the directory looking for source files to be compiled.
     * The results are returned in the class variable compileList
     *
     * @param srcDir   The source directory
     * @param destDir  The destination directory
     * @param files    An array of filenames
     */
    protected void scanDir(File srcDir, File destDir, String[] files) {
        GlobPatternMapper m = new GlobPatternMapper();
        m.setFrom("*");
        m.setTo("*.html");
        SourceFileScanner sfs = new SourceFileScanner(this);
        File[] newFiles = sfs.restrictAsFiles(files, srcDir, destDir, m);

        if (newFiles.length > 0) {
            File[] newCompileList = new File[compileList.length + newFiles.length];
            System.arraycopy(compileList, 0, newCompileList, 0, compileList.length);
            System.arraycopy(newFiles, 0, newCompileList, compileList.length, newFiles.length);
            compileList = newCompileList;
        }
    }

    /**
     * Gets the list of files to be compiled.
     * @return the list of files as an array
     */
    public File[] getFileList() {
        return compileList;
    }

    protected void checkParameters() throws BuildException {
        if (src == null) {
            throw new BuildException("srcdir attribute must be set!", getLocation());
        }
        if (src.size() == 0) {
            throw new BuildException("srcdir attribute must be set!", getLocation());
        }

        if (destDir != null && !destDir.isDirectory()) {
            throw new BuildException(
                "destination directory \"" + destDir + "\" does not exist " + "or is not a directory",
                getLocation());
        }

        if (encoding != null && !Charset.isSupported(encoding)) {
            throw new BuildException("encoding \"\" not supported");
        }
    }

    protected void compile() {
        if (compileList.length > 0) {
            log(
                "Generating Tests "
                    + compileList.length
                    + " source file"
                    + (compileList.length == 1 ? "" : "s")
                    + (destDir != null ? " to " + destDir : ""));

            if (listFiles) {
                for (int i = 0; i < compileList.length; i++) {
                    String filename = compileList[i].getAbsolutePath();
                    log(filename);
                }
            }

            try {
                Path classpath = getClasspath();
                if (classpath != null) {
                    //@todo - is this useful?
                    //batchOfBiscuits.setClasspath(classpath.toString());
                }
                batchGenerate.setTargetDirectory(destDir);

                if (encoding != null) {
                    batchGenerate.setSourceEncoding(encoding);
                }

                batchGenerate.addSources( compileList );
                batchGenerate.compile( );
            }
            catch (Exception e) {

                StringWriter writer = new StringWriter();
                //@todo --
                e.printStackTrace();
                //new ErrorReporter( e, false ).write( new PrintWriter(writer) );
                String message = writer.toString();

                if (failOnError) {
                    throw new BuildException(message, e, getLocation());
                }
                else {
                    log(message, Project.MSG_ERR);
                }

            }
        }
    }
}