package jas2.hist;

import jas2.util.xml.XMLNodeTraverser;

import java.io.Serializable;
import java.util.Observable;
import java.util.StringTokenizer;

import org.w3c.dom.Attr;
import org.w3c.dom.Node;
import org.w3c.dom.Text;


public class XML2DScatterDataSource extends Observable implements ScatterPlotSource, Serializable
{
	public XML2DScatterDataSource(int p_xAxisType, int p_yAxisType,
								  String p_title, double[][] p_data) {
		
		m_xAxisType = p_xAxisType;
		m_yAxisType = p_yAxisType;
		m_title = p_title;
		m_data = p_data;
		
		//now calculate the x and y min and max once and for all
		//(so we can return them quickly)
		m_xmin = m_data[0][0];
		m_xmax = m_xmin;
		m_ymin = m_data[1][0];
		m_ymax = m_ymin;
		for (int i=1; i < m_data[0].length; i++) {
			if (m_data[0][i] < m_xmin) m_xmin = m_data[0][i];
			if (m_data[0][i] > m_xmax) m_xmax = m_data[0][i];
			if (m_data[1][i] < m_ymin) m_ymin = m_data[1][i];
			if (m_data[1][i] > m_ymax) m_ymax = m_data[1][i];
		}
	}
	public double getXMin() {
		return m_xmin;
	}
	public double getXMax() {
		return m_xmax;
	}
	public double getYMin() {
		return m_ymin;
	}
	public double getYMax() {
		return m_ymax;
	}
	public int getXAxisType() {
		return m_xAxisType;
	}
	public int getYAxisType() {
		return m_yAxisType;
	}
	public ScatterEnumeration startEnumeration(double xMin, double xMax, double yMin, double yMax) {
		return new FixedEnumeration(m_data, xMin, xMax, yMin, yMax);
	}
	public ScatterEnumeration startEnumeration() {
		return new FixedEnumeration(m_data);
	}
	public String getTitle() {
		return m_title;
	}
	
	
	
	private double m_xmin;
	private double m_xmax;
	private double m_ymin;
	private double m_ymax;
	private int m_xAxisType;
	private int m_yAxisType;
	private String m_title;
	private double[][] m_data;
	
	private class FixedEnumeration implements ScatterEnumeration {
		public FixedEnumeration(double[][] p_data) {
			m_data = p_data;
			selectAll = true;
		}
		public FixedEnumeration(double[][] p_data, double xMin, double xMax, double yMin, double yMax) {
			m_data = p_data;
			selectAll = false;
			m_xmin = xMin;
			m_xmax = xMax;
			m_ymin = yMin;
			m_ymax = yMax;
		}
		public boolean getNextPoint(double[] a) {
			
			if (selectAll) {
				if (pos < (m_data[0].length - 1)) {
					a[0] = m_data[0][pos];
					a[1] = m_data[1][pos++];
					return true;
				} else {
					return false;
				}
			} else {
				
				while (!((m_data[0][pos] >= m_xmin) && (m_data[0][pos] <= m_xmax) &&
						 (m_data[1][pos] >= m_ymin) && (m_data[1][pos] <= m_ymax))) {
					//skip points that don't satisfy the conditions
					pos++;
					if(pos>m_data[0].length-1){
						return false;
					}
					
				}
				//okay, if we're here the point satisfies the min and max conditions
				a[0] = m_data[0][pos];
				a[1] = m_data[1][pos++];
				return pos