UniqueResourceFilter.java

package bndtools.bndplugins.repo.git;

import java.util.*;

import org.xml.sax.*;

import aQute.libg.sax.filters.*;

public class UniqueResourceFilter extends ElementSelectionFilter {

    final Set<String> uris = new HashSet<String>();
    final Map<String,List<String>> filteredResources = new HashMap<String,List<String>>();

    @Override
    protected boolean select(int depth, String uri, String localName, String qName, Attributes attribs) {
        if ("resource".equals(qName)) {
            String resourceUri = attribs.getValue("uri");
            if (uris.contains(resourceUri)) {
                addFilteredBundle(attribs.getValue("symbolicname"), attribs.getValue("version"));
                return false;
            }
            uris.add(resourceUri);
        }
        return true;
    }

    private void addFilteredBundle(String bsn, String version) {
        List<String> versions = filteredResources.get(bsn);
        if (versions == null) {
            versions = new LinkedList<String>();
            filteredResources.put(bsn, versions);
        }
        versions.add(version);
    }

    public Collection<String> getFilteredBSNs() {
        return filteredResources.keySet();
    }

    public Collection<String> getFilteredVersions(String bsn) {
        List<String> list = filteredResources.get(bsn);
        if (list == null)
            list = Collections.emptyList();
        return list;
    }

}