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SchemaCrawler is an open-source Java API that makes working with database metadata as easy as working with plain old Java objects. SchemaCrawler is also a database schema discovery and comprehension, and schema documentation tool. You can search for database schema objects using regular expressions, and output the schema and data in a readable text format. The output is designed to be diff-ed against other database schemas.
/*
========================================================================
SchemaCrawler
http://www.schemacrawler.com
Copyright (c) 2000-2024, Sualeh Fatehi .
All rights reserved.
------------------------------------------------------------------------
SchemaCrawler is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
SchemaCrawler and the accompanying materials are made available under
the terms of the Eclipse Public License v1.0, GNU General Public License
v3 or GNU Lesser General Public License v3.
You may elect to redistribute this code under any of these licenses.
The Eclipse Public License is available at:
http://www.eclipse.org/legal/epl-v10.html
The GNU General Public License v3 and the GNU Lesser General Public
License v3 are available at:
http://www.gnu.org/licenses/
========================================================================
*/
package us.fatehi.utility;
import static java.lang.Math.abs;
import static java.lang.Math.floor;
import static us.fatehi.utility.Utility.requireNotBlank;
/**
* Color breaks the dependency on java.awt.Color. The AWT comes with a lot of baggage, and is not
* part of Java Compact Profile 2.
*/
public final class Color {
public static final Color white = new Color(255, 255, 255);
public static Color fromHexTriplet(final String htmlColor) {
requireNotBlank(htmlColor, "No color provided");
if (htmlColor.length() != 7 || !htmlColor.startsWith("#")) {
throw new IllegalArgumentException("Bad color provided, " + htmlColor);
}
// Parse color
try {
final int r = Integer.parseInt(htmlColor.substring(1, 3), 16);
final int b = Integer.parseInt(htmlColor.substring(3, 5), 16);
final int g = Integer.parseInt(htmlColor.substring(5, 7), 16);
return new Color(r, b, g);
} catch (final Exception e) {
throw new IllegalArgumentException("Bad color provided, " + htmlColor, e);
}
}
/**
* Converting from HSV (HSB in Java) to RGB
* without using java.awt.Color
*/
public static Color fromHSV(final float hue, final float saturation, final float value) {
final float normalizedHue = abs(hue - (float) floor(hue));
final int h = (int) (normalizedHue * 6);
final float f = normalizedHue * 6 - h;
final float p = value * (1 - saturation);
final float q = value * (1 - f * saturation);
final float t = value * (1 - (1 - f) * saturation);
switch (h) {
case 0:
return fromRGB(value, t, p);
case 1:
return fromRGB(q, value, p);
case 2:
return fromRGB(p, value, t);
case 3:
return fromRGB(p, q, value);
case 4:
return fromRGB(t, p, value);
case 5:
return fromRGB(value, p, q);
default:
throw new IllegalArgumentException(
String.format(
"Could not convert from HSV (%f, %f, %f) to RGB",
normalizedHue, saturation, value));
}
}
public static Color fromRGB(final int r, final int g, final int b) {
return new Color(r, g, b);
}
private static Color fromRGB(final float r, final float g, final float b) {
return new Color((int) (r * 255 + 0.5), (int) (g * 255 + 0.5), (int) (b * 255 + 0.5));
}
private final int b;
private final int g;
private final int r;
private Color(final int r, final int g, final int b) {
if (r < 0) {
this.r = 0;
} else {
this.r = Math.min(r, 255);
}
if (g < 0) {
this.g = 0;
} else {
this.g = Math.min(g, 255);
}
if (b < 0) {
this.b = 0;
} else {
this.b = Math.min(b, 255);
}
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Color other = (Color) obj;
if (b != other.b) {
return false;
}
if (g != other.g) {
return false;
}
return r == other.r;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + b;
result = prime * result + g;
result = prime * result + r;
return result;
}
@Override
public String toString() {
final int rgb = (r & 0xFF) << 16 | (g & 0xFF) << 8 | b & 0xFF;
final String htmlColor = "#" + String.format("%06x", rgb).toUpperCase();
return htmlColor;
}
}