168 lines
3.4 KiB
Java
168 lines
3.4 KiB
Java
package postgresql.geometric;
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import java.awt.Point;
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import java.io.*;
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import java.sql.*;
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import postgresql.util.*;
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/**
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* This implements a version of java.awt.Point, except it uses double
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* to represent the coordinates.
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*
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* <p>It maps to the point datatype in postgresql.
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*/
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public class PGpoint extends PGobject implements Serializable,Cloneable
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{
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/**
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* The X coordinate of the point
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*/
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public double x;
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/**
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* The Y coordinate of the point
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*/
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public double y;
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/**
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* @param x coordinate
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* @param y coordinate
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*/
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public PGpoint(double x,double y)
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{
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this();
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this.x = x;
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this.y = y;
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}
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/**
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* This is called mainly from the other geometric types, when a
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* point is imbeded within their definition.
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*
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* @param value Definition of this point in PostgreSQL's syntax
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*/
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public PGpoint(String value) throws SQLException
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{
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this();
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setValue(value);
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}
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/**
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* Required by the driver
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*/
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public PGpoint()
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{
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setType("point");
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}
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/**
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* @param s Definition of this point in PostgreSQL's syntax
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* @exception SQLException on conversion failure
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*/
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public void setValue(String s) throws SQLException
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{
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PGtokenizer t = new PGtokenizer(PGtokenizer.removePara(s),',');
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try {
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x = Double.valueOf(t.getToken(0)).doubleValue();
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y = Double.valueOf(t.getToken(1)).doubleValue();
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} catch(NumberFormatException e) {
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throw new PSQLException("postgresql.geo.point",e.toString());
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}
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}
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/**
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* @param obj Object to compare with
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* @return true if the two boxes are identical
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*/
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public boolean equals(Object obj)
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{
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if(obj instanceof PGpoint) {
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PGpoint p = (PGpoint)obj;
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return x == p.x && y == p.y;
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}
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return false;
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}
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/**
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* This must be overidden to allow the object to be cloned
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*/
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public Object clone()
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{
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return new PGpoint(x,y);
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}
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/**
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* @return the PGpoint in the syntax expected by postgresql
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*/
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public String getValue()
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{
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return "("+x+","+y+")";
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}
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/**
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* Translate the point with the supplied amount.
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* @param x integer amount to add on the x axis
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* @param y integer amount to add on the y axis
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*/
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public void translate(int x,int y)
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{
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translate((double)x,(double)y);
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}
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/**
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* Translate the point with the supplied amount.
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* @param x double amount to add on the x axis
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* @param y double amount to add on the y axis
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*/
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public void translate(double x,double y)
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{
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this.x += x;
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this.y += y;
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}
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/**
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* Moves the point to the supplied coordinates.
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* @param x integer coordinate
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* @param y integer coordinate
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*/
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public void move(int x,int y)
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{
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setLocation(x,y);
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}
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/**
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* Moves the point to the supplied coordinates.
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* @param x double coordinate
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* @param y double coordinate
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*/
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public void move(double x,double y)
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{
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this.x = x;
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this.y = y;
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}
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/**
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* Moves the point to the supplied coordinates.
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* refer to java.awt.Point for description of this
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* @param x integer coordinate
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* @param y integer coordinate
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* @see java.awt.Point
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*/
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public void setLocation(int x,int y)
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{
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move((double)x,(double)y);
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}
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/**
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* Moves the point to the supplied java.awt.Point
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* refer to java.awt.Point for description of this
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* @param p Point to move to
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* @see java.awt.Point
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*/
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public void setLocation(Point p)
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{
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setLocation(p.x,p.y);
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}
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}
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