package de.dhbwstuttgart.parser;

import java.util.Vector;

import de.dhbwstuttgart.syntaxtree.type.RefType;

/**
 * Stellt den Namen einer Java Klasse dar. 
 * Dieser kann auch den Packagenamen mit beinhalten: java.util.Vector
 * 
 * @author janulrich
 *
 */
public class JavaClassName {

	private String name;
	private PackageName packageName;
	
	public JavaClassName(String name){
		if(name == null)throw new NullPointerException();
		String[] names = name.split("[.]");
		boolean match = true;
		if(names.length == 1){
			//packageName = new PackageName();
			this.name = name;
		}else {
			name = names[names.length-1];
			Vector<String> packageNames = new Vector<String>();
			for(int i = 0; i<names.length-1;i++){
				packageNames.add(names[i]);
			}
			packageName = new PackageName(packageNames);
			this.name = names[names.length-1];
		}
	}
	
	//Auto-generated hashCode:
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((name == null) ? 0 : name.hashCode());
		//result = prime * result
		//		+ ((packageName == null) ? 0 : packageName.hashCode()); //PackageName does not infect hashCode
		return result;
	}

	/**
	 * Namen sind nur gleich, wenn bei den beiden zu vergleichenden JavaClassNames auch das Package angegeben ist
	 */
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if(obj instanceof String)
			return this.toString().equals(obj) || (this.name != null && this.name.equals(obj)); //Auch mit Strings als Klassennamen kompatibel TODO: sollte bald obsolet sein
		if (getClass() != obj.getClass())
			return false;
		JavaClassName other = (JavaClassName) obj;
		if (name == null) {
			if (other.name != null)
				return false;
		} else if (!name.equals(other.name))
			return false;
		if (packageName != null && other.packageName != null) {
			if (!packageName.equals(other.packageName))
				return false;//Spezialfall, nicht beide Typen müssen eindeutig mit Packagenamen angegeben werden
		}
		return true;
	}

	@Override
	public String toString() {
		return (packageName!=null ? packageName.toString() : "") + name;
	}
}

class PackageName{

	Vector<String> names = new Vector<String>();
	
	public PackageName(Vector<String> packageNames) {
		names = packageNames;
	}

	public PackageName() {
		//Do nothing
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((names == null) ? 0 : names.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		PackageName other = (PackageName) obj;
		if (names == null) {
			if (other.names != null)
				return false;
		} else if (!names.equals(other.names))
			return false;
		return true;
	}
	
	@Override
	public String toString() {
		String ret = "";
		if(names == null)return "";
		for(String n : names)ret+=n+".";
		return ret;
	}
}