package org.hwo;

import java.util.ArrayList;
import java.util.List;

public class ObjectTable {

	private int width;
	private List<ObjectSet> rows;
	
	public ObjectTable(int width){
		this.width = width;
		this.rows = new ArrayList<ObjectTable.ObjectSet>();
	}
	public ObjectTable(){
		this.width = 0;
		this.rows = new ArrayList<ObjectTable.ObjectSet>();
	}
	
	public ObjectTable selectColums(int[] columns){
		ObjectTable ot = new ObjectTable( columns.length );
		
		for (ObjectSet row: this.rows){
			Object[] sv = new Object[ columns.length ];
			
			for (int i=0;i<columns.length;i++){
				sv[i] = row.getValues()[columns[i]];
			}
			ot.add(sv);
		}
		
		return ot;
	}
	
	public ObjectSet getRow(int row){
		return this.rows.get(row);
	}
	
	public ObjectSet[] getRows(){
		return this.rows.toArray(new ObjectSet[0]);
	}
	
	public void add(ObjectSet row){
		this.rows.add(row);
	}
	
	public void add(Object[] values){
		if ((this.width == 0) && (this.rows.size()==0)){
			this.width = values.length;
		}
		add(new ObjectSet(values));
	}
	
	public void remove(int row){
		this.rows.remove(row);
	}
	public void remove(ObjectSet row){
		this.rows.remove(row);
	}
	
	public void set(int row,Object[] values){
		this.rows.get(row).set(values);		
	}
	
	public void set(int row,int cell,Object value){
		this.rows.get(row).set(cell, value);
	}
	
	public String getString(int row,int cell){
		return this.rows.get(row).getString(cell);
	}
	public int getInteger(int row,int cell){
		return this.rows.get(row).getInteger(cell);
	}
	public float getFloat(int row,int cell){
		return this.rows.get(row).getFloat(cell);
	}
	
	
	public class ObjectSet{
		
		private Object[] values;
		
		public ObjectSet(){
			this.values = new Object[ width ];
		}

		public ObjectSet(Object[] values){
			this.values = new Object[ width ];
			set(values);
		}

		public void set(Object[] values){
			if (values.length > width){
				throw new ArrayIndexOutOfBoundsException();
			}
			
			for (int n=0;n<values.length;n++){
				this.values[n] = values[n];
			}
			for (int n=values.length;n<width;n++){
				this.values[n] = null;
			}
		}
		public void set(int n,Object o){
			values[n] = o;
		}

		public Object[] getValues(){
			return this.values;
		}
		
		public String getString(int n){
			return values[n].toString();
		}
		public int getInteger(int n){
			if (values[n]==null){
				return 0;
			} else if (Integer.class.isInstance(values[n])){
				return (Integer)values[n];
			} else {
				return Integer.decode(values[n].toString());
			}
		}
		public float getFloat(int n){
			if (values[n]==null){
				return 0;
			} else if (Float.class.isInstance(values[n])){
				return (Float)values[n];
			} else {
				return Float.parseFloat(values[n].toString());
			}
		}
		
		public Object[] selectColums(int[] columns){
			Object[] sv = new Object[ columns.length ];
			
			for (int i=0;i<columns.length;i++){
				sv[i] = this.values[columns[i]];
			}
			return sv;
		}

		
	}
	
}