jrempropertymapper.java

JRemoteControl is a simple Java&#8482 driven bluetooth remote control.It allows you to initiate virt

/*
 * JRemCntl - Copyright (C) 2007 Filippo Di Vattimo <[e-mail]>
 * See COPYING
 */

package fildiv.jremcntl.server.core;

import java.util.Collection;
import java.util.Collections;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;

import fildiv.jremcntl.common.util.JRemUtils;

public class JRemPropertyMapper {

	protected static final short FIND_TYPE_INTNAME = 0;
	protected static final short FIND_TYPE_XMLNAME = 1;
	protected static final short FIND_TYPE_CLSNAME = 2;
	
	private Map allPropertiesMap;
	private Map objMap;
	
	public static interface JRemPropertyValueMapper {
		Object toCls(Object value); 
		String toXml(Object value);
	};
	
	protected JRemPropertyMapper() {
		allPropertiesMap = new Hashtable();
		objMap = new Hashtable();		
	}

	protected JRemPropertyMapper(Object propertiesArr[]) {

		this();
		
		final int columnCount = 4;
		for (int index = 0; index < propertiesArr.length; 
			index+= columnCount) {
			
			String intPropName = (String) propertiesArr[index];
			String xmlPropName = (String) propertiesArr[index + 1];
			String clsPropName = (String) propertiesArr[index + 2];
			JRemPropertyValueMapper pvm = (JRemPropertyValueMapper) 
				propertiesArr[index + 3];

			JRemProperty p = new JRemProperty(
					intPropName, xmlPropName, 
					clsPropName, pvm);
					
			if (allPropertiesMap.get(intPropName) != null)
				throw new IllegalArgumentException(
						"Property (" + p.toString() + ") already registered");
			allPropertiesMap.put(intPropName, p);
		}

	}
	
	protected void registerProperty(String objName, JRemProperty property) {
		
		if (allPropertiesMap.get(property) != null)
			return;
		
		String intPropName = property.getIntPropName();
		allPropertiesMap.put(intPropName, property);
		
		Map propertiesMap = getPropertiesMap(objName);
		propertiesMap.put(intPropName, property);
	}
	
	protected JRemProperty getProperty(String objName) {
		
		JRemProperty property = (JRemProperty) allPropertiesMap.get(objName);
		if (property == null)
			throw new IllegalArgumentException(
					"The property '" + objName + "' was not defined");
		
		return property;
	}

	protected Map getPropertiesMap(String objName) {
		
		Map propertyMap = (Map) objMap.get(objName);
		if (propertyMap == null)
			propertyMap = new Hashtable();
		objMap.put(objName, propertyMap);
		
		return propertyMap;
	}
	
	protected void registerSupportedProperties(String objName, String[] propertyArr) {
		
		if (propertyArr == null || JRemUtils.isEmptyString(objName))
			throw new IllegalArgumentException();

		Map propertiesMap = getPropertiesMap(objName);

		for (int index = 0; index < propertyArr.length; ++index) {
			
			String propertyName = propertyArr[index];
			
			JRemProperty property = getProperty(propertyName);
			propertiesMap.put(propertyName, property);
		}
		
	}

	protected Collection getSupportedProperties(String objName) {
		
		Map propertiesMap = getPropertiesMap(objName);
		
		return Collections.unmodifiableCollection(
				propertiesMap.values());
	}

	protected JRemProperty findProperty(String objName, String propValue, 
			short findType) {

		Collection c = getSupportedProperties(objName);
		
		for (Iterator i = c.iterator(); i.hasNext(); ) {
		
			JRemProperty p = (JRemProperty) i.next();
			String value;
			
			switch(findType) {
			case FIND_TYPE_INTNAME:
				value = p.getIntPropName();
				break;
			case FIND_TYPE_XMLNAME:
				value = p.getXmlPropName();
				break;
			case FIND_TYPE_CLSNAME:
				value = p.getClsPropName();
				break;
			default:
				throw new IllegalArgumentException();
			}
			
			if (value.equals(propValue))
				return p;
		}

		return null;
	}
	
}