webbeta / Serializer

import es.webbeta.serializer.base.Cache;

import es.webbeta.serializer.base.MetadataAccessor;

import java.io.File;

public class CacheMetadataAccessor extends FileMetadataAccessor implements MetadataAccessor {

    private static final String KEY_TPL = "serializer_metadata___%s";

    private Cache cache;

    public CacheMetadataAccessor(Cache cache) {

        super();

        this.cache = cache;

    }

    private String generateKey(Class<?> klass) {

        return generateKey(klass.getCanonicalName());

    }

    private String generateKey(String canonical) {

        return String.format(KEY_TPL, canonical);

    }

    private String getFilenameWithoutExtension(String fileName) {

            return fileName.substring(0, fileName.lastIndexOf("."));

        } else {

            return fileName;

        }

    }

    @Override

    public String getMetadataContent(Class<?> klass) {

        String key = generateKey(klass);

        if (cache.get(key) != null)

            return cache.get(key);

        else {

            if (super.hasMetadata(klass)) {

                String metadata = super.getMetadataContent(klass);

                cache.set(key, metadata);

                return metadata;

            } else

                return null;

        }

    }

    /**

     * Removes all cache entries

     */

    public void clearMetadataCache() {

        File dir = this.metadataPath.toFile();

        if (dir == null) return;

        File[] files = dir.listFiles();

        if (files == null) return;

        for (final File fileEntry : files) {

            if (!fileEntry.isFile()) continue;

            String canonical = getFilenameWithoutExtension(fileEntry.getName());

            String cacheKey = generateKey(canonical);

            if (cache.get(cacheKey) != null)

                cache.remove(cacheKey);

        }

    }

}