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package postgresql.geometric;
import java.io.*;
import java.sql.*;
import postgresql.util.*;
/**
* This implements a lseg (line segment) consisting of two points
*/
public class PGlseg extends PGobject implements Serializable,Cloneable
{
/**
* These are the two points.
*/
public PGpoint point[] = new PGpoint[2];
/**
* @param x1 coordinate for first point
* @param y1 coordinate for first point
* @param x2 coordinate for second point
* @param y2 coordinate for second point
*/
public PGlseg(double x1,double y1,double x2,double y2)
{
this(new PGpoint(x1,y1),new PGpoint(x2,y2));
}
/**
* @param p1 first point
* @param p2 second point
*/
public PGlseg(PGpoint p1,PGpoint p2)
{
this();
this.point[0] = p1;
this.point[1] = p2;
}
/**
* @param s definition of the circle in PostgreSQL's syntax.
* @exception SQLException on conversion failure
*/
public PGlseg(String s) throws SQLException
{
this();
setValue(s);
}
/**
* reuired by the driver
*/
public PGlseg()
{
setType("lseg");
}
/**
* @param s Definition of the line segment in PostgreSQL's syntax
* @exception SQLException on conversion failure
*/
public void setValue(String s) throws SQLException
{
PGtokenizer t = new PGtokenizer(PGtokenizer.removeBox(s),',');
if(t.getSize() != 2)
throw new SQLException("conversion of lseg failed - "+s);
point[0] = new PGpoint(t.getToken(0));
point[1] = new PGpoint(t.getToken(1));
}
/**
* @param obj Object to compare with
* @return true if the two boxes are identical
*/
public boolean equals(Object obj)
{
if(obj instanceof PGlseg) {
PGlseg p = (PGlseg)obj;
return (p.point[0].equals(point[0]) && p.point[1].equals(point[1])) ||
(p.point[0].equals(point[1]) && p.point[1].equals(point[0]));
}
return false;
}
/**
* This must be overidden to allow the object to be cloned
*/
public Object clone()
{
return new PGlseg((PGpoint)point[0].clone(),(PGpoint)point[1].clone());
}
/**
* @return the PGlseg in the syntax expected by postgresql
*/
public String getValue()
{
return "["+point[0]+","+point[1]+"]";
}
}
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