package org.wamblee.system;

import java.util.Arrays;

/**
 * Default implementation of a service descriptor.
 *
 * @author Erik Brakkee
 */
public class DefaultProvidedInterfaceDescriptor implements ProvidedInterfaceDescriptor {
	
	private String _name; 
	private Class[] _interfaces; 
	
	/**
	 * Constructs the descriptor. 
	 * @param aInterface Type of service. 
	 */
	public DefaultProvidedInterfaceDescriptor(String aName, Class aInterface) {
		_name = aName; 
		_interfaces = new Class[] { aInterface };  
	}
	
	public DefaultProvidedInterfaceDescriptor(String aName, Class[] aInterfaces) {
		_name = aName; 
		_interfaces = Arrays.copyOf(aInterfaces, aInterfaces.length);  
	}

	@Override
	public String getName() {
		return _name;
	}
	
	@Override
	public Class[] getInterfaceTypes() {
		return _interfaces;
	}
	
	@Override
	public boolean equals(Object obj) {
		if ( !(obj instanceof DefaultProvidedInterfaceDescriptor)) { 
			return false; 
		}
		DefaultProvidedInterfaceDescriptor descr = (DefaultProvidedInterfaceDescriptor)obj;
		if ( _interfaces.length != descr._interfaces.length ) { 
			return false; 
		}
		String[] interfaces1 = new String[_interfaces.length];
		String[] interfaces2 = new String[_interfaces.length];
		for (int i = 0; i < _interfaces.length; i++) {  
			interfaces1[i] = _interfaces[i].getName();
			interfaces2[i] = descr._interfaces[i].getName();
		}
		Arrays.sort(interfaces1);
		Arrays.sort(interfaces2);
		return Arrays.equals(interfaces1, interfaces2);
	}

	@Override
	public int hashCode() {
		return _interfaces.hashCode(); 
	}
	
	@Override
	public String toString() {
		StringBuffer buf = new StringBuffer();
		for (Class intf: _interfaces) { 
			buf.append("." + intf.getName());
		}
		return buf.toString();
	}
}