com.coderplus.m2e.yuicompressorcore.CoderPlusBuildParticipant.java Source code

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Here is the source code for com.coderplus.m2e.yuicompressorcore.CoderPlusBuildParticipant.java

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package com.coderplus.m2e.yuicompressorcore;

/*******************************************************************************
 * Copyright (c) 2014 Aneesh Joseph
 * 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:
 * Aneesh Joseph(coderplus.com)
 *******************************************************************************/
import java.io.File;
import java.util.Set;
import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.util.Scanner;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.m2e.core.MavenPlugin;
import org.eclipse.m2e.core.embedder.IMaven;
import org.eclipse.m2e.core.project.configurator.MojoExecutionBuildParticipant;
import org.sonatype.plexus.build.incremental.BuildContext;

public class CoderPlusBuildParticipant extends MojoExecutionBuildParticipant {

    private static final String SOURCE_DIRECTORY = "sourceDirectory";
    private static final String OUTPUT_DIRECTORY = "outputDirectory";
    private static final String SKIP = "skip";

    public CoderPlusBuildParticipant(MojoExecution execution) {

        super(execution, true);
    }

    @Override
    public Set<IProject> build(final int kind, final IProgressMonitor monitor) throws Exception {

        final MojoExecution execution = getMojoExecution();

        if (execution == null) {
            return null;
        }
        IMaven maven = MavenPlugin.getMaven();
        MavenProject project = getMavenProjectFacade().getMavenProject();
        final BuildContext buildContext = getBuildContext();

        boolean skip = Boolean.TRUE.equals(
                maven.getMojoParameterValue(project, execution, SKIP, Boolean.class, new NullProgressMonitor()));

        if (skip) {
            return null;
        }

        if (buildContext.isIncremental()) {
            File resourcesDirectory = maven.getMojoParameterValue(project, execution, SOURCE_DIRECTORY, File.class,
                    new NullProgressMonitor());
            if (resourcesDirectory == null || !resourcesDirectory.exists()) {
                resourcesDirectory = new File(project.getBasedir(), "src/main/resources");
            }
            Scanner ds = buildContext.newScanner(resourcesDirectory);
            if (ds != null) {
                ds.scan();
                String[] includedResourceFiles = ds.getIncludedFiles();
                if (includedResourceFiles == null || includedResourceFiles.length == 0) {
                    //ignore if there were no changes to the resources and was an incremental build
                    return null;
                }
            }
        }

        File outputDirectory = maven.getMojoParameterValue(project, execution, OUTPUT_DIRECTORY, File.class,
                new NullProgressMonitor());
        setTaskName(monitor);

        //execute the maven mojo
        final Set<IProject> result = executeMojo(kind, monitor);

        if (outputDirectory != null && outputDirectory.exists()) {
            buildContext.refresh(outputDirectory);
        }

        return result;
    }

    private void setTaskName(IProgressMonitor monitor) throws CoreException {
        if (monitor != null) {
            final String taskName = String.format("CoderPlus M2E: Invoking %s on %s",
                    getMojoExecution().getMojoDescriptor().getFullGoalName(),
                    getMavenProjectFacade().getProject().getName());
            monitor.setTaskName(taskName);
        }
    }

    private Set<IProject> executeMojo(final int kind, final IProgressMonitor monitor) throws Exception {

        return super.build(kind, monitor);
    }

}