liquibase.resource.FileSystemResourceAccessor Maven / Gradle / Ivy

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package liquibase.resource;

import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.*;

/**
 * A FileOpener implementation which finds Files in the
 * File System.
 * 
 * FileSystemFileOpeners can use a BaseDirectory to determine
 * where relative paths should be resolved from.
 *
 * @author  getResources(String packageName) throws IOException {
        String directoryPath = (new File(packageName).isAbsolute() || baseDirectory == null) ? packageName : baseDirectory + File.separator + packageName;

        File directoryFile = new File(directoryPath);
        if (!directoryFile.exists()) {
            return new Vector().elements();
        }

        if (!directoryFile.isDirectory()) {
            return new Vector(Arrays.asList(directoryFile.toURL())).elements();
        }

        File[] files = directoryFile.listFiles();
        
        List results = new ArrayList();

        if (files != null) {
            for (File f : files) {
                if (!f.isDirectory())
                    results.add(f.toURI().toURL());
            }
        }

        final Iterator it = results.iterator();
        return new Enumeration() {

            @Override
            public boolean hasMoreElements() {
                return it.hasNext();
            }

            @Override
            public URL nextElement() {
                return it.next();
            }
        };
    }

    @Override
    public ClassLoader toClassLoader() {
        try {
            return new URLClassLoader(new URL[]{new URL("file://" + baseDirectory)});
        } catch (MalformedURLException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public String toString() {
        String dir = baseDirectory;
        if (dir == null) {
            dir = new File(".").getAbsolutePath();
        }
        return getClass().getName()+"("+ dir +")";
    }

}