org.jclouds.atmosonline.saas.functions.ParseUserMetadataFromHeaders.java Source code

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Here is the source code for org.jclouds.atmosonline.saas.functions.ParseUserMetadataFromHeaders.java

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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
 *
 * ====================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ====================================================================
 */

package org.jclouds.atmosonline.saas.functions;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.Map;
import java.util.Set;

import javax.inject.Singleton;

import org.jclouds.atmosonline.saas.domain.UserMetadata;
import org.jclouds.atmosonline.saas.reference.AtmosStorageHeaders;
import org.jclouds.http.HttpResponse;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;

/**
 * @author Adrian Cole
 */
@Singleton
public class ParseUserMetadataFromHeaders implements Function<HttpResponse, UserMetadata> {
    private final Set<String> sysKeys = ImmutableSet.of("atime", "ctime", "gid", "itime", "mtime", "nlink",
            "policyname", "size", "uid");

    public UserMetadata apply(HttpResponse from) {
        UserMetadata md = new UserMetadata();
        Map<String, String> metaMap = getMetaMap(
                checkNotNull(from.getFirstHeaderOrNull(AtmosStorageHeaders.META), AtmosStorageHeaders.META));

        Set<String> keys = Sets.difference(metaMap.keySet(), sysKeys);
        for (String key : keys) {
            md.getMetadata().put(key, metaMap.get(key));
        }
        if (from.getFirstHeaderOrNull(AtmosStorageHeaders.LISTABLE_META) != null)
            md.getListableMetadata()
                    .putAll(getMetaMap(from.getFirstHeaderOrNull(AtmosStorageHeaders.LISTABLE_META)));

        if (from.getFirstHeaderOrNull(AtmosStorageHeaders.TAGS) != null)
            md.getTags().addAll(getTags(from.getFirstHeaderOrNull(AtmosStorageHeaders.TAGS)));
        if (from.getFirstHeaderOrNull(AtmosStorageHeaders.LISTABLE_TAGS) != null)
            md.getTags().addAll(getTags(from.getFirstHeaderOrNull(AtmosStorageHeaders.LISTABLE_TAGS)));
        return md;
    }

    private Set<String> getTags(String meta) {
        Set<String> tags = Sets.newTreeSet();
        String[] metas = meta.split(", ");
        for (String entry : metas) {
            tags.add(entry);
        }
        return tags;
    }

    private Map<String, String> getMetaMap(String meta) {
        Map<String, String> metaMap = Maps.newHashMap();
        String[] metas = meta.split(", ");
        for (String entry : metas) {
            String[] entrySplit = entry.split("=");
            metaMap.put(entrySplit[0], entrySplit[1]);
        }
        return metaMap;
    }
}