Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/ValueKey.java @ 4149:71a4b664a16a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merged.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Tue, 16 Oct 2012 11:36:21 +0200
parents 6dc847194625
children
rev   line source
501
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package de.intevation.flys.importer;
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
2
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
3 import java.math.BigDecimal;
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
4
503
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
5 import java.util.Comparator;
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
6
501
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
7 public class ValueKey
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
8 {
503
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
9 public static final double EPSILON = 1e-6;
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
10
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
11 public static final Comparator<ValueKey> EPSILON_COMPARATOR =
771
6dc847194625 Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 503
diff changeset
12 new Comparator<ValueKey>()
503
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
13 {
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
14 public int compare(ValueKey x, ValueKey y) {
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
15 int cmp = ValueKey.compare(x.a, y.a);
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
16 if (cmp != 0) return cmp;
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
17 return ValueKey.compare(x.b, y.b);
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
18 }
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
19 };
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
20
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
21 public static int compare(BigDecimal a, BigDecimal b) {
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
22 if (a == null && b == null) return 0;
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
23 if (a != null && b == null) return +1;
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
24 if (a == null && b != null) return -1;
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
25
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
26 double diff = a.doubleValue() - b.doubleValue();
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
27 if (diff < -EPSILON) return -1;
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
28 return diff > EPSILON ? +1 : 0;
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
29 }
bcc18293a547 Importer: Added unsharp lookup to avoid numerical problems.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 501
diff changeset
30
501
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
31 protected BigDecimal a;
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
32 protected BigDecimal b;
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
33
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
34 public ValueKey() {
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
35 }
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
36
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
37 public ValueKey(BigDecimal a, BigDecimal b) {
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
38 this.a = a;
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
39 this.b = b;
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
40 }
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
41
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
42 @Override
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
43 public int hashCode() {
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
44 return ((a != null ? a.hashCode() : 0) << 16)
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
45 | (b != null ? b.hashCode() : 0);
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
46 }
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
47
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
48 @Override
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
49 public boolean equals(Object other) {
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
50 if (!(other instanceof ValueKey)) {
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
51 return false;
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
52 }
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
53 ValueKey o = (ValueKey)other;
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
54 return !(
771
6dc847194625 Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 503
diff changeset
55 (a == null && o.a != null)
6dc847194625 Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 503
diff changeset
56 || (a != null && o.a == null)
6dc847194625 Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 503
diff changeset
57 || (a != null && !a.equals(o.a))
6dc847194625 Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 503
diff changeset
58 || (b == null && o.b != null)
501
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
59 || (b != null && o.b == null)
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
60 || (b != null && !b.equals(o.b)));
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
61 }
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
62 }
04d449f7f0c9 Importer: Change caching strategy not to cause OOM any more.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
63 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org