BaseSettingsHandler.java

/*
  BaseSettingsHandler.java

  (c) 2011-2013 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.common.settings;

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

import ejs.base.properties.IProperty;

import v9t9.common.client.ISettingsHandler;

/**
 * @author ejs
 *
 */
public class BaseSettingsHandler implements ISettingsHandler {

	private IStoredSettings transientSettings = new BaseStoredSettings(
			ISettingsHandler.TRANSIENT) {
	
			@Override
			public String getConfigFileName() {
				return null;
			}
		};
	protected final IStoredSettings machineSettings;
	protected final IStoredSettings userSettings;

	
	public BaseSettingsHandler(IStoredSettings machineSettings,
			IStoredSettings userSettings) {
		this.machineSettings = machineSettings;
		this.userSettings = userSettings;
		
		machineSettings.setOwner(this);
		userSettings.setOwner(this);
		transientSettings.setOwner(this);
	}

	/* (non-Javadoc)
	 * @see v9t9.common.client.ISettingsHandler#getRegisteredSettings()
	 */
	@Override
	public Map<IProperty, SettingSchema> getAllSettings() {
		Map<IProperty, SettingSchema> ret = new HashMap<IProperty, SettingSchema>();
		ret.putAll(transientSettings.getAll());
		ret.putAll(userSettings.getAll());
		ret.putAll(machineSettings.getAll());
		return ret;
	}

	@Override
	public IStoredSettings getMachineSettings() {
		return machineSettings;
	}

	@Override
	public IStoredSettings getUserSettings() {
		return userSettings;
	}

	@Override
	public IProperty get(SettingSchema schema) {
		return getSettings(schema.getContext()).findOrCreate(schema);
	}

	@Override
	public <T extends IProperty> T get(String context, T defaultProperty) {
		return getSettings(context).findOrCreate(defaultProperty);
	}

	/**
	 * @param def
	 * @return
	 */
	protected IStoredSettings getSettings(String context) {
		IStoredSettings settings;
		if (MACHINE.equals(context))
			settings = getMachineSettings();
		else if (USER.equals(context))
			settings = getUserSettings();
		else if (TRANSIENT.equals(context))
			settings = transientSettings;
		else
			throw new IllegalArgumentException("unknown settings context: " + context);
		return settings;
	}
	
	/* (non-Javadoc)
	 * @see v9t9.common.client.ISettingsHandler#findSettingStorage(java.lang.String)
	 */
	@Override
	public IStoredSettings findSettingStorage(String settingsName) {
		if (machineSettings.find(settingsName) != null)
			return machineSettings;
		if (userSettings.find(settingsName) != null)
			return userSettings;
		if (transientSettings.find(settingsName) != null)
			return transientSettings;
		return null;
	}

}