live.document.mavenplugin.neo4j.IncludeProjectDependenciesComponentConfigurator Maven / Gradle / Ivy

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package live.document.mavenplugin.neo4j;

import lombok.extern.slf4j.Slf4j;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.component.annotations.Requirement;
import org.codehaus.plexus.component.configurator.AbstractComponentConfigurator;
import org.codehaus.plexus.component.configurator.ComponentConfigurationException;
import org.codehaus.plexus.component.configurator.ComponentConfigurator;
import org.codehaus.plexus.component.configurator.ConfigurationListener;
import org.codehaus.plexus.component.configurator.converters.composite.ObjectWithFieldsConverter;
import org.codehaus.plexus.component.configurator.converters.lookup.ConverterLookup;
import org.codehaus.plexus.component.configurator.converters.special.ClassRealmConverter;
import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
import org.codehaus.plexus.configuration.PlexusConfiguration;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

@Slf4j
@Component(role = ComponentConfigurator.class, hint = "include-project-dependencies")
public class IncludeProjectDependenciesComponentConfigurator extends AbstractComponentConfigurator {

    @Requirement(role = ConverterLookup.class, hint = "default")
    public void configureComponent(Object component, PlexusConfiguration configuration,
                                   ExpressionEvaluator expressionEvaluator, ClassRealm containerRealm,
                                   ConfigurationListener listener )
            throws ComponentConfigurationException {

        addProjectDependenciesToClassRealm(expressionEvaluator, containerRealm);

        converterLookup.registerConverter( new ClassRealmConverter( containerRealm ) );

        ObjectWithFieldsConverter converter = new ObjectWithFieldsConverter();

        converter.processConfiguration( converterLookup, component, this.getClass().getClassLoader(), configuration,
                expressionEvaluator, listener );
    }

    private void addProjectDependenciesToClassRealm(ExpressionEvaluator expressionEvaluator, ClassRealm containerRealm)
            throws ComponentConfigurationException {
        List runtimeClasspathElements;
        try {
            //noinspection unchecked
            runtimeClasspathElements = (List) expressionEvaluator.evaluate("${project.runtimeClasspathElements}");
        } catch (ExpressionEvaluationException e) {
            throw new ComponentConfigurationException("There was a problem evaluating: ${project.runtimeClasspathElements}", e);
        }

        // Add the project dependencies to the ClassRealm
        final URL[] urls = buildURLs(runtimeClasspathElements);
        for (URL url : urls) {
            containerRealm.addURL(url);
        }
    }

    private URL[] buildURLs(List runtimeClasspathElements) throws ComponentConfigurationException {
        // Add the projects classes and dependencies
        List urls = new ArrayList(runtimeClasspathElements.size());
        for (String element : runtimeClasspathElements) {
            try {
                final URL url = new File(element).toURI().toURL();
                urls.add(url);
                log.debug("Added to project class loader: {}", url);
            } catch (MalformedURLException e) {
                throw new ComponentConfigurationException("Unable to access project dependency: " + element, e);
            }
        }

        // Add the plugin's dependencies (so Trove stuff works if Trove isn't on
        return urls.toArray(new URL[urls.size()]);
    }

}