package org.gridkit.jvmtool.stacktrace.analytics.flame;
import java.awt.Color;
import org.gridkit.jvmtool.stacktrace.GenericStackElement;
import org.gridkit.jvmtool.stacktrace.StackFrame;
public class DefaultColorPicker implements FlameColorPicker {
@Override
public int pickColor(GenericStackElement[] trace) {
if (trace.length == 0) {
return 0xFFFFFF;
}
StackFrame sf = (StackFrame) trace[trace.length - 1];
int c = hashColor(12, 10, sf);
return c;
}
public static int hashColor(int baseHue, int deltaHue, StackFrame sf) {
int hP = packageNameHash(sf.getClassName());
int hC = classNameHash(sf.getClassName());
int hM = sf.getMethodName().hashCode();
int hue = deltaHue == 0 ? baseHue : baseHue + (hP % (2 * deltaHue)) - deltaHue;
int sat = 180 + (hC % 20) - 10;
int lum = 220 + (hM % 20) - 10;
int c = Color.HSBtoRGB(hue / 255f, sat / 255f, lum / 255f);
return c;
}
public static int hashGrayColor(StackFrame sf) {
int hC = classNameHash(sf.getClassName());
int hM = sf.getMethodName().hashCode();
int hue = 0;
int sat = 0;
int lum = 220 + ((hM + hC) % 20) - 10;
int c = Color.HSBtoRGB(hue / 255f, sat / 255f, lum / 255f);
return c;
}
private static int packageNameHash(String className) {
int c = className.lastIndexOf('.');
if (c >= 0) {
return className.substring(0, c).hashCode();
}
else {
return 0;
}
}
private static int classNameHash(String className) {
int c = className.lastIndexOf('.');
if (c >= 0) {
className = className.substring(c + 1);
}
c = className.indexOf('$');
if (c >= 0) {
int nhash = className.substring(0, c).hashCode();
int shash = className.substring(c + 1).hashCode();
return nhash + (shash % 10);
}
else {
return className.hashCode();
}
}
}