JarFileLocator.java

package org.objectweb.jonas_lib.loader.locator;

import java.io.IOException;
import java.net.URL;
import java.util.Enumeration;
import java.util.List;
import java.util.Vector;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;

public class JarFileLocator extends Locator {

    private JarFile file = null;

    public JarFileLocator(URL jar) throws IOException {
        String filename = jar.getFile();
        file = new JarFile(filename);
    }

    public boolean hasFile(String path) {

        ZipEntry entry = file.getEntry(path);
        return (entry != null);
    }

    public boolean hasDirectory(String path) {

        boolean found = false;
        for (Enumeration e = file.entries(); e.hasMoreElements() && !found;) {
            ZipEntry entry = (ZipEntry) e.nextElement();
            if (entry.getName().startsWith(path)) {
                return true;
            }
        }

        return false;
    }

    public List listContent(String path) {

        List libs = new Vector();
        for (Enumeration e = file.entries(); e.hasMoreElements();) {
            ZipEntry entry = (ZipEntry) e.nextElement();
            if (entry.getName().startsWith(path)) {
                libs.add(entry.getName());
            }
        }

        return libs;
    }

}

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