1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*-------------------------------------------------------------------------
*
* Copyright (c) 2003-2008, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $PostgreSQL: pgjdbc/org/postgresql/geometric/PGbox.java,v 1.15 2008/01/08 06:56:28 jurka Exp $
*
*-------------------------------------------------------------------------
*/
package org.postgresql.geometric;
import org.postgresql.util.GT;
import org.postgresql.util.PGobject;
import org.postgresql.util.PGtokenizer;
import org.postgresql.util.PSQLException;
import org.postgresql.util.PSQLState;
import java.io.Serializable;
import java.sql.SQLException;
/**
* This represents the box datatype within org.postgresql.
*/
public class PGbox extends PGobject implements Serializable, Cloneable
{
/**
* These are the two points.
*/
public PGpoint point[] = new PGpoint[2];
/**
* @param x1 first x coordinate
* @param y1 first y coordinate
* @param x2 second x coordinate
* @param y2 second y coordinate
*/
public PGbox(double x1, double y1, double x2, double y2)
{
this();
this.point[0] = new PGpoint(x1, y1);
this.point[1] = new PGpoint(x2, y2);
}
/**
* @param p1 first point
* @param p2 second point
*/
public PGbox(PGpoint p1, PGpoint p2)
{
this();
this.point[0] = p1;
this.point[1] = p2;
}
/**
* @param s Box definition in PostgreSQL syntax
* @exception SQLException if definition is invalid
*/
public PGbox(String s) throws SQLException
{
this();
setValue(s);
}
/**
* Required constructor
*/
public PGbox()
{
setType("box");
}
/**
* This method sets the value of this object. It should be overidden,
* but still called by subclasses.
*
* @param value a string representation of the value of the object
* @exception SQLException thrown if value is invalid for this type
*/
public void setValue(String value) throws SQLException
{
PGtokenizer t = new PGtokenizer(value, ',');
if (t.getSize() != 2)
throw new PSQLException(GT.tr("Conversion to type {0} failed: {1}.", new Object[]{type,value}), PSQLState.DATA_TYPE_MISMATCH);
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 PGbox)
{
PGbox p = (PGbox)obj;
// Same points.
if (p.point[0].equals(point[0]) && p.point[1].equals(point[1]))
return true;
// Points swapped.
if (p.point[0].equals(point[1]) && p.point[1].equals(point[0]))
return true;
// Using the opposite two points of the box:
// (x1,y1),(x2,y2) -> (x1,y2),(x2,y1)
if (p.point[0].x == point[0].x && p.point[0].y == point[1].y &&
p.point[1].x == point[1].x && p.point[1].y == point[0].y)
return true;
// Using the opposite two points of the box, and the points are swapped
// (x1,y1),(x2,y2) -> (x2,y1),(x1,y2)
if (p.point[0].x == point[1].x && p.point[0].y == point[0].y &&
p.point[1].x == point[0].x && p.point[1].y == point[1].y)
return true;
}
return false;
}
public int hashCode()
{
// This relies on the behaviour of point's hashcode being an exclusive-OR of
// its X and Y components; we end up with an exclusive-OR of the two X and
// two Y components, which is equal whenever equals() would return true
// since xor is commutative.
return point[0].hashCode() ^ point[1].hashCode();
}
public Object clone() throws CloneNotSupportedException
{
PGbox newPGbox = (PGbox) super.clone();
if( newPGbox.point != null )
{
newPGbox.point = (PGpoint[]) newPGbox.point.clone();
for( int i = 0; i < newPGbox.point.length; ++i )
if( newPGbox.point[i] != null )
newPGbox.point[i] = (PGpoint) newPGbox.point[i].clone();
}
return newPGbox;
}
/**
* @return the PGbox in the syntax expected by org.postgresql
*/
public String getValue()
{
return point[0].toString() + "," + point[1].toString();
}
}
|
