package org.hwo.models;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Column {
	private int MODE_FIELD = 1;
	private int MODE_GETSET = 2;
	
	private int mode;
	private String fieldName;
	private boolean readonly;
	private Class p_class;
	private Field field;
	private Method getter;
	private Method setter;
		
	public Column(Class classInfo,String fieldName,boolean readonly) throws NoSuchFieldException
	{
		this.fieldName = fieldName;
		this.readonly = readonly;
		this.p_class = classInfo;
		this.getter = null;
		this.setter = null;
		
		try
		{
			mode = MODE_FIELD;
			this.field = this.p_class.getDeclaredField(fieldName);
			this.field.setAccessible(true);
		} catch (NoSuchFieldException nsfex)
		{
			mode = MODE_GETSET;
			// Kein deklariertes Feld, also suchen wir eine get... und set... Methode...
			Method[] methods = this.p_class.getDeclaredMethods();
			for (Method method : methods) {
				// passender getter?
				if (("get"+fieldName.toLowerCase()).equals(method.getName().toLowerCase()))
					getter = method;
				// passender setter?
				if (("set"+fieldName.toLowerCase()).equals(method.getName().toLowerCase()))
					setter = method;
			}
			if (getter == null)
				throw nsfex;
		}
	}
	
	
	public String getFieldName()
	{
		return this.fieldName;
	}
	
	public boolean getReadOnly()
	{
		if ((mode == MODE_GETSET) && (setter == null))
			return true;
		
		return this.readonly;
	}
	public void setReadOnly(boolean readOnly)
	{
		this.readonly = readOnly;
	}
	
	public Class getColumnClass()
	{
		if (mode == MODE_GETSET)
			return this.getter.getReturnType();
		
		return this.field.getType();
	}
	
	Object getValue(Object o)
	{
		try
		{
			if (mode == MODE_GETSET)
			{
				try
				{
					Object ro = this.getter.invoke(o, null);
					return ro;
				} catch (InvocationTargetException itex)
				{
					System.err.println(itex.toString());
					itex.printStackTrace();					
				}
			}
			return this.field.get(o);
		} catch (IllegalArgumentException e) {
			System.err.println("IllegalArgument! " + e.toString());
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			System.err.println("IllegalAccess! " + e.toString());
			e.printStackTrace();
		}
		return null;
	}
	void setValue(Object o,Object value)
	{
		try
		{
			if (mode == MODE_GETSET)
			{
				if (this.setter != null)
				{
					try
					{
						this.setter.invoke(o,new Object[]{ value });
					} catch (InvocationTargetException itex)
					{
						System.err.println(itex.toString());
						itex.printStackTrace();						
					}
				}
			}
			this.field.set(o,value);
		} catch (IllegalArgumentException e) {
			System.err.println("IllegalArgument! " + e.toString());
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			System.err.println("IllegalAccess! " + e.toString());
			e.printStackTrace();
		}
		return;
	}
}