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| | | import java.security.MessageDigest;
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| | | import java.security.NoSuchAlgorithmException;
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| | | import java.util.ArrayList;
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| | | import java.util.Collection;
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| | | import java.util.Collections;
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| | | import java.util.Comparator;
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| | | import java.util.List;
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| | |
| | | public class StringUtils {
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| | |
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| | | public static final String MD5_TYPE = "MD5:";
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| | |
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| | | public static final String COMBINED_MD5_TYPE = "CMD5:";
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| | |
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| | | /**
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| | | * Returns true if the string is null or empty.
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| | |
| | | * @param values
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| | | * @return flattened list
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| | | */
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| | | public static String flattenStrings(List<String> values) {
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| | | public static String flattenStrings(Collection<String> values) {
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| | | return flattenStrings(values, " ");
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| | | }
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| | |
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| | |
| | | * @param separator
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| | | * @return flattened list
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| | | */
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| | | public static String flattenStrings(List<String> values, String separator) {
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| | | public static String flattenStrings(Collection<String> values, String separator) {
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| | | StringBuilder sb = new StringBuilder();
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| | | for (String value : values) {
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| | | sb.append(value).append(separator);
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| | | }
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| | | if (sb.length() > 0) {
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| | | // truncate trailing separator
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| | | sb.setLength(sb.length() - separator.length());
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| | | }
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| | | return sb.toString().trim();
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| | | }
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| | |
| | | }
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| | | });
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| | | }
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| | | }
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| | |
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| | | public static String getColor(String value) {
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| | | int cs = 0;
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| | | for (char c : getMD5(value.toLowerCase()).toCharArray()) {
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| | | cs += c;
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| | | }
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| | | int n = (cs % 360); |
| | | float hue = ((float) n) / 360;
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| | | return hsvToRgb(hue, 0.90f, 0.65f);
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| | | }
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| | |
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| | | public static String hsvToRgb(float hue, float saturation, float value) {
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| | | int h = (int) (hue * 6);
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| | | float f = hue * 6 - h;
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| | | float p = value * (1 - saturation);
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| | | float q = value * (1 - f * saturation);
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| | | float t = value * (1 - (1 - f) * saturation);
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| | |
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| | | switch (h) {
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| | | case 0:
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| | | return rgbToString(value, t, p);
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| | | case 1:
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| | | return rgbToString(q, value, p);
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| | | case 2:
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| | | return rgbToString(p, value, t);
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| | | case 3:
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| | | return rgbToString(p, q, value);
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| | | case 4:
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| | | return rgbToString(t, p, value);
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| | | case 5:
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| | | return rgbToString(value, p, q);
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| | | default:
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| | | throw new RuntimeException(
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| | | "Something went wrong when converting from HSV to RGB. Input was " + hue + ", "
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| | | + saturation + ", " + value);
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| | | }
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| | | }
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| | |
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| | | public static String rgbToString(float r, float g, float b) {
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| | | String rs = Integer.toHexString((int) (r * 256));
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| | | String gs = Integer.toHexString((int) (g * 256));
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| | | String bs = Integer.toHexString((int) (b * 256));
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| | | return "#" + rs + gs + bs;
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| | | }
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| | | } |