public ArtifactFilter getArtifactFilter() {
        Set<String> excludes = new LinkedHashSet<>(getExcludedArtifacts());

        for (ArtifactFilterManagerDelegate delegate : delegates) {
            delegate.addExcludes(excludes);
        }

        return new ExclusionSetFilter(excludes);
    }

    /**
     * Returns the artifact filter for the standard core artifacts.
     *

import java.util.Set;

/**
 * @deprecated use {@code META-INF/maven/extension.xml} to define artifacts exported by Maven core extensions.
 */
@Deprecated
public interface ArtifactFilterManagerDelegate {

    void addExcludes(Set<String> excludes);

    void addCoreExcludes(Set<String> excludes);

        assertTrue(urlFilter.match("http://test.com/a"));

    }

    public void test_match_exclude_case2() {
        urlFilter.addExclude("http://example.com/.*");
        urlFilter.addExclude("http://test.com/.*");

        final String sessionId = "id1";
        urlFilter.init(sessionId);

        assertFalse(urlFilter.match("http://example.com/"));

        super.removeInclude(include);

        // Update the project's SourceRoots
        updateProjectSourceRoot();
    }

    @Override
    public void addExclude(String exclude) {
        // Update the underlying Resource model
        super.addExclude(exclude);

        // Update the project's SourceRoots
        updateProjectSourceRoot();
    }

    @Override
    public void removeExclude(String exclude) {

     */
    protected UrlFilterService urlFilterService;

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.filter.UrlFilter#addExclude(java.lang.String)
     */
    @Override
    public void addExclude(final String urlPattern) {
        try {
            Pattern.compile(urlPattern);
        } catch (final Exception e) {
            if (logger.isWarnEnabled()) {

     */
    void addInclude(String urlPattern);

    /**
     * Add an url pattern as a non-target.
     *
     * @param urlPattern Regular expression that is not crawled
     */
    void addExclude(String urlPattern);

    /**
     * Process an url when it's added as a seed url.
     *
     * @param url URL
     */
    void processUrl(String url);

    /**
     * Clear this filter.
     */