ApplicationStateService.java

package org.overlord.dtgov.ui.client.local.services;

import java.util.HashMap;
import java.util.Map;

import javax.enterprise.context.ApplicationScoped;

/**
 * Local service responsible for holding application state.
 * 
 * @author eric.wittmann@redhat.com
 */
@ApplicationScoped
public class ApplicationStateService {

    private Map<String, Object> state = new HashMap<String, Object>();

    /**
     * Constructor.
     */
    public ApplicationStateService() {
    }

    /**
     * Gets application state by key.
     * @param key
     */
    public Object get(String key) {
        return state.get(key);
    }

    /**
     * Gets the application state by key, returning the given default if
     * not found in the state map.
     * @param key
     * @param defaultValue
     */
    public Object get(String key, Object defaultValue) {
        Object value = get(key);
        if (value == null) {
            value = defaultValue;
        }
        return value;
    }

    /**
     * Store some application state by key.
     * @param key
     * @param value
     */
    public void put(String key, Object value) {
        state.put(key, value);
    }
}