com.datacoper.maven.util.ClassLoaderUtil.java Source code

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Here is the source code for com.datacoper.maven.util.ClassLoaderUtil.java

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package com.datacoper.maven.util;

import com.datacoper.maven.exception.DcRuntimeException;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;
import java.util.List;
import org.apache.maven.artifact.DependencyResolutionRequiredException;
import org.apache.maven.project.MavenProject;

/**
 *
 * @author alessandro
 */
public abstract class ClassLoaderUtil {

    private static ClassLoader classLoader;

    static Class<?> loadClass(String className) {
        try {
            return classLoader.loadClass(className);
        } catch (ClassNotFoundException ex) {
            throw new DcRuntimeException(ex);
        }
    }

    private ClassLoaderUtil() {
    }

    public static void clearCache() {
        classLoader = null;
    }

    public static ClassLoader getClassLoader() {
        return classLoader;
    }

    @SuppressWarnings("unchecked")
    public static ClassLoader loadClassLoader(MavenProject project) {
        try {
            List<String> elements = CollectionsUtil.concat(project.getRuntimeClasspathElements(),
                    project.getTestClasspathElements());

            return initializeClassLoader(elements);

        } catch (DependencyResolutionRequiredException | MalformedURLException ex) {
            ex.printStackTrace();
            throw new RuntimeException(ex);
        }
    }

    public static void addToClassLoader(String classPath) throws MalformedURLException {
        initializeClassLoader(Arrays.asList(classPath));
    }

    private static ClassLoader initializeClassLoader(List<String> elements) throws MalformedURLException {
        URL[] runtimeUrls = convertPathToURI(elements);

        final ClassLoader currentContext = Thread.currentThread().getContextClassLoader();

        classLoader = new URLClassLoader(runtimeUrls, currentContext);

        return classLoader;
    }

    private static URL[] convertPathToURI(List<String> elements) throws MalformedURLException {
        URL[] runtimeUrls = new URL[elements.size()];
        for (int i = 0; i < elements.size(); i++) {
            String element = (String) elements.get(i);
            runtimeUrls[i] = new File(element).toURI().toURL();
        }
        return runtimeUrls;
    }
}