Synnefo » Pithos Web Client

package gr.grnet.pithos.web.client.catalog;

import gr.grnet.pithos.web.client.Helpers;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

/**

 * Holds one-to-one mappings from user IDs to respective user display names.

 *

 * The iterator returns map entries with id as the key and name as the value.

 */

public class UserCatalogs implements Iterable<Map.Entry<String, String>>{

    private HashMap<String, String> id2name = new HashMap<String, String>();

    private HashMap<String, String> name2id = new HashMap<String, String>();

    public UserCatalogs() {

        this(new HashMap<String, String>(), new HashMap<String, String>());

    }

    private UserCatalogs(HashMap<String, String> id2name, HashMap<String, String> name2id) {

        this.id2name = id2name;

        this.name2id = name2id;

    }

    public UserCatalogs updateWithIDAndName(String id, String name) {

        this.id2name.put(id, name);

        this.name2id.put(name, id);

        return this;

    }

    public UserCatalogs updateFrom(UserCatalogs other) {

        for(Map.Entry<String, String> otherIDAndName : other) {

            this.updateWithIDAndName(otherIDAndName.getKey(), otherIDAndName.getValue());

        }

        return this;

    }

    public UserCatalogs copy() {

        return new UserCatalogs(

            Helpers.copyHashMap(id2name),

            Helpers.copyHashMap(name2id)

        );

    }

    public boolean hasID(String id) {

        return id2name.containsKey(id);

    }

    public boolean hasName(String name) {

        return name2id.containsKey(name);

    }

    public String getDisplayName(String id) {

        return id2name.get(id);

    }

    public String getUserID(String name) {

        return name2id.get(name);

    }

    @Override

    public Iterator<Map.Entry<String, String>> iterator() {

        return id2name.entrySet().iterator();

    }

}