org.apache.shindig.social.opensocial.jpa.spi.SPIUtils.java Source code

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Here is the source code for org.apache.shindig.social.opensocial.jpa.spi.SPIUtils.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.shindig.social.opensocial.jpa.spi;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import org.apache.shindig.auth.SecurityToken;
import org.apache.shindig.social.opensocial.spi.UserId;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Set;

/**
 *
 */
public class SPIUtils {

    /**
     * @param userIds
     * @param token
     * @return
     */
    public static List<String> getUserList(Set<UserId> userIds, SecurityToken token) {
        // TODO What's the use of userIdMap?
        HashMap<String, String> userIdMap = Maps.newHashMap();
        List<String> paramList = Lists.newArrayList();
        for (UserId u : userIds) {
            try {
                String uid = u.getUserId(token);
                if (uid != null) {
                    userIdMap.put(uid, uid);
                    paramList.add(uid);
                }
            } catch (IllegalStateException istate) {
                // ignore the user id.
            }
        }
        return paramList;
    }

    /**
     * @param userId
     * @param token
     * @return
     */
    public static String getUserList(UserId userId, SecurityToken token) {
        return userId.getUserId(token);
    }

    public static <T> List<T> toList(Set<T> s) {
        List<T> l = new ArrayList<T>(s.size());
        l.addAll(s);
        return l;
    }

}