Groovy example source code file (GroovycTask.java)

This example Groovy source code file (GroovycTask.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

buildexception, compilationunit, compilationunit, compiling, file, file, forcefully, globpatternmapper, groovyclassloader, io, no, sourcefilescanner, sourcefilescanner, string, string

The Groovy GroovycTask.java source code

/*
 * Copyright 2003-2007 the original author or authors.
 *
 * Licensed 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.codehaus.groovy.ant;

import groovy.lang.GroovyClassLoader;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.util.GlobPatternMapper;
import org.apache.tools.ant.util.SourceFileScanner;

import org.codehaus.groovy.control.CompilationUnit;

import java.io.File;

/**
 * Compiles Groovy source files.
 *
 * @version $Id: GroovycTask.java 7819 2007-08-30 03:46:54Z user57 $
 * @author <a href="mailto:jason@planet57.com">Jason Dillon
 */
public class GroovycTask
    extends CompileTaskSupport
{
    protected boolean force;

    public void setForce(final boolean flag) {
        this.force = flag;
    }

    protected void compile() {
        Path path = getClasspath();
        if (path != null) {
            config.setClasspath(path.toString());
        }

        config.setTargetDirectory(destdir);

        GroovyClassLoader gcl = createClassLoader();
        CompilationUnit compilation = new CompilationUnit(config, null, gcl);

        GlobPatternMapper mapper = new GlobPatternMapper();
        mapper.setFrom("*.groovy");
        mapper.setTo("*.class");
        
        int count = 0;
        String[] list = src.list();

        for (int i = 0; i < list.length; i++) {
            File basedir = getProject().resolveFile(list[i]);
            
            if (!basedir.exists()) {
                throw new BuildException("Source directory does not exist: " + basedir, getLocation());
            }

            DirectoryScanner scanner = getDirectoryScanner(basedir);
            String[] includes = scanner.getIncludedFiles();

            if (force) {
                log.debug("Forcefully including all files from: " + basedir);

                for (int j=0; j < includes.length; j++) {
                    File file = new File(basedir, includes[j]);
                    log.debug("    "  + file);

                    compilation.addSource(file);
                    count++;
                }
            }
            else {
                log.debug("Including changed files from: " + basedir);

                SourceFileScanner sourceScanner = new SourceFileScanner(this);
                File[] files = sourceScanner.restrictAsFiles(includes, basedir, destdir, mapper);

                for (int j=0; j < files.length; j++) {
                    log.debug("    "  + files[j]);

                    compilation.addSource(files[j]);
                    count++;
                }
            }
        }

        if (count > 0) {
            log.info("Compiling " + count + " source file" + (count > 1 ? "s" : "") + " to " + destdir);

            compilation.compile();
        }
        else {
            log.info("No sources found to compile");
        }
    }
}