DynaProviderMojo.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.providers;

import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.plugins.annotations.ResolutionScope;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.util.List;

/**
 * Mojo for generation implementation of DynaProvider interface.
 *
 * @author Evgen Vidolob
 */
@Mojo(name = "generate", requiresDependencyResolution = ResolutionScope.COMPILE)
public class DynaProviderMojo extends AbstractMojo {
    @Parameter(property = "outputDir", required = true)
    private String outputDirectory;

    @Parameter(property = "typeName", defaultValue = "org.eclipse.che.providers.DynaProviderImpl")
    private String typeName;

    @Parameter(property = "project.compileClasspathElements", required = true, readonly = true)
    private List<String> classpath;

    @Override
    public void execute() throws MojoExecutionException, MojoFailureException {
        File outFile = new File(outputDirectory, typeName.replace('.', File.separatorChar) + ".java");
        String packageName = typeName.substring(0, typeName.lastIndexOf('.'));
        String className = typeName.substring(typeName.lastIndexOf('.') + 1, typeName.length());

        DynaProviderGenerator generator = new DynaProviderGenerator(packageName, className, classpath);


        try {
            Files.createDirectories(outFile.toPath().getParent());
        } catch (IOException e) {
            throw new MojoExecutionException("Can't create packages folders", e);
        }
        try (BufferedWriter writer = new BufferedWriter(new FileWriter(outFile))) {
            writer.write(generator.generate());
        } catch (IOException e) {
            throw new MojoExecutionException("Can't write file content", e);
        }
    }
}