package net.osmand.util;
import net.osmand.IProgress;
import net.osmand.PlatformUtil;
import org.apache.commons.logging.Log;
import java.io.BufferedReader;
import java.io.Closeable;
import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
/**
* Basic algorithms that are not in jdk
*/
public class Algorithms {
private static final int BUFFER_SIZE = 1024;
private static final Log log = PlatformUtil.getLog(Algorithms.class);
public static boolean isEmpty(Collection c) {
return c == null || c.size() == 0;
}
public static boolean isEmpty(Map map) {
return map == null || map.size() == 0;
}
public static boolean isEmpty(String s) {
return s == null || s.length() == 0;
}
public static boolean isBlank(String s) {
return s == null || s.trim().length() == 0;
}
public static boolean stringsEqual(String s1, String s2) {
if (s1 == null && s2 == null) {
return true;
} else if (s1 == null) {
return false;
} else if (s2 == null) {
return false;
}
return s2.equals(s1);
}
public static long parseLongSilently(String input, long def) {
if (input != null && input.length() > 0) {
try {
return Long.parseLong(input);
} catch (NumberFormatException e) {
return def;
}
}
return def;
}
public static int parseIntSilently(String input, int def) {
if (input != null && input.length() > 0) {
try {
return Integer.parseInt(input);
} catch (NumberFormatException e) {
return def;
}
}
return def;
}
public static String getFileNameWithoutExtension(File f) {
String name = f.getName();
int i = name.indexOf('.');
if (i >= 0) {
name = name.substring(0, i);
}
return name;
}
public static String getFileExtension(File f) {
String name = f.getName();
int i = name.lastIndexOf(".");
return name.substring(i + 1);
}
public static File[] getSortedFilesVersions(File dir) {
File[] listFiles = dir.listFiles();
if (listFiles != null) {
Arrays.sort(listFiles, getFileVersionComparator());
}
return listFiles;
}
public static Comparator<File> getFileVersionComparator() {
return new Comparator<File>() {
@Override
public int compare(File o1, File o2) {
return -simplifyFileName(o1.getName()).compareTo(simplifyFileName(o2.getName()));
}
public String simplifyFileName(String fn) {
String lc = fn.toLowerCase();
if (lc.contains(".")) {
lc = lc.substring(0, lc.indexOf("."));
}
if (lc.endsWith("_2")) {
lc = lc.substring(0, lc.length() - "_2".length());
}
boolean hasTimestampEnd = false;
for (int i = 0; i < lc.length(); i++) {
if (lc.charAt(i) >= '0' && lc.charAt(i) <= '9') {
hasTimestampEnd = true;
break;
}
}
if (!hasTimestampEnd) {
lc += "_00_00_00";
}
return lc;
}
};
}
private static final char CHAR_TOSPLIT = 0x01;
public static Map<String, String> decodeMap(String s) {
if (isEmpty(s)) {
return Collections.emptyMap();
}
Map<String, String> names = new HashMap<String, String>();
String[] split = s.split(CHAR_TOSPLIT + "");
// last split is an empty string
for (int i = 1; i < split.length; i += 2) {
names.put(split[i - 1], split[i]);
}
return names;
}
public static String encodeMap(Map<String, String> names) {
if (names != null) {
Iterator<Entry<String, String>> it = names.entrySet().iterator();
StringBuilder bld = new StringBuilder();
while (it.hasNext()) {
Entry<String, String> e = it.next();
bld.append(e.getKey()).append(CHAR_TOSPLIT)
.append(e.getValue().replace(CHAR_TOSPLIT, (char) (CHAR_TOSPLIT + 1)));
bld.append(CHAR_TOSPLIT);
}
return bld.toString();
}
return "";
}
public static int findFirstNumberEndIndex(String value) {
int i = 0;
boolean valid = false;
if (value.length() > 0 && value.charAt(0) == '-') {
i++;
}
while (i < value.length() && (isDigit(value.charAt(i)) || value.charAt(i) == '.')) {
i++;
valid = true;
}
if (valid) {
return i;
} else {
return -1;
}
}
public static boolean isDigit(char charAt) {
return charAt >= '0' && charAt <= '9';
}
/**
* Determine whether a file is a ZIP File.
*/
public static boolean isZipFile(File file) throws IOException {
if (file.isDirectory()) {
return false;
}
if (!file.canRead()) {
throw new IOException("Cannot read file " + file.getAbsolutePath());
}
if (file.length() < 4) {
return false;
}
FileInputStream in = new FileInputStream(file);
int test = readInt(in);
in.close();
return test == 0x504b0304;
}
private static int readInt(InputStream in) throws IOException {
int ch1 = in.read();
int ch2 = in.read();
int ch3 = in.read();
int ch4 = in.read();
if ((ch1 | ch2 | ch3 | ch4) < 0)
throw new EOFException();
return ((ch1 << 24) + (ch2 << 16) + (ch3 << 8) + ch4);
}
public static String capitalizeFirstLetterAndLowercase(String s) {
if (s != null && s.length() > 1) {
// not very efficient algorithm
return Character.toUpperCase(s.charAt(0)) + s.substring(1).toLowerCase();
} else {
return s;
}
}
public static String capitalizeFirstLetter(String s) {
if (s != null && s.length() > 0) {
return Character.toUpperCase(s.charAt(0)) + (s.length() > 1 ? s.substring(1) : "");
} else {
return s;
}
}
public static boolean objectEquals(Object a, Object b) {
if (a == null) {
return b == null;
} else {
return a.equals(b);
}
}
/**
* Parse the color string, and return the corresponding color-int.
* If the string cannot be parsed, throws an IllegalArgumentException
* exception. Supported formats are:
* #RRGGBB
* #AARRGGBB
* 'red', 'blue', 'green', 'black', 'white', 'gray', 'cyan', 'magenta',
* 'yellow', 'lightgray', 'darkgray'
*/
public static int parseColor(String colorString) {
if (colorString.charAt(0) == '#') {
// Use a long to avoid rollovers on #ffXXXXXX
if (colorString.length() == 4) {
colorString = "#" +
colorString.charAt(1) + colorString.charAt(1) +
colorString.charAt(2) + colorString.charAt(2) +
colorString.charAt(3) + colorString.charAt(3);
}
long color = Long.parseLong(colorString.substring(1), 16);
if (colorString.length() == 7) {
// Set the alpha value
color |= 0x00000000ff000000;
} else if (colorString.length() != 9) {
throw new IllegalArgumentException("Unknown color " + colorString); //$NON-NLS-1$
}
return (int) color;
}
throw new IllegalArgumentException("Unknown color " + colorString); //$NON-NLS-1$
}
public static int extractFirstIntegerNumber(String s) {
int i = 0;
for (int k = 0; k < s.length(); k++) {
if (isDigit(s.charAt(k))) {
i = i * 10 + (s.charAt(k) - '0');
} else {
break;
}
}
return i;
}
public static int extractIntegerNumber(String s) {
int i = 0;
int k;
for (k = 0; k < s.length(); k++) {
if (isDigit(s.charAt(k))) {
break;
}
}
for (; k < s.length(); k++) {
if (isDigit(s.charAt(k))) {
i = i * 10 + (s.charAt(k) - '0');
} else {
break;
}
}
return i;
}
public static String extractIntegerPrefix(String s) {
int k = 0;
for (; k < s.length(); k++) {
if (Character.isDigit(s.charAt(k))) {
return s.substring(0, k);
}
}
return "";
}
public static String extractOnlyIntegerSuffix(String s) {
int k = 0;
for (; k < s.length(); k++) {
if (Character.isDigit(s.charAt(k))) {
return s.substring(k);
}
}
return "";
}
public static String extractIntegerSuffix(String s) {
int k = 0;
for (; k < s.length(); k++) {
if (!Character.isDigit(s.charAt(k))) {
return s.substring(k);
}
}
return "";
}
@SuppressWarnings("TryFinallyCanBeTryWithResources")
public static void fileCopy(File src, File dst) throws IOException {
FileOutputStream fout = new FileOutputStream(dst);
try {
FileInputStream fin = new FileInputStream(src);
try {
Algorithms.streamCopy(fin, fout);
} finally {
fin.close();
}
} finally {
fout.close();
}
}
public static void streamCopy(InputStream in, OutputStream out) throws IOException {
byte[] b = new byte[BUFFER_SIZE];
int read;
while ((read = in.read(b)) != -1) {
out.write(b, 0, read);
}
}
public static void streamCopy(InputStream in, OutputStream out, IProgress pg, int bytesDivisor) throws IOException {
byte[] b = new byte[BUFFER_SIZE];
int read;
int cp = 0;
while ((read = in.read(b)) != -1) {
out.write(b, 0, read);
cp += read;
if (pg != null && cp > bytesDivisor) {
pg.progress(cp / bytesDivisor);
cp = cp % bytesDivisor;
}
}
}
public static void oneByteStreamCopy(InputStream in, OutputStream out) throws IOException {
int read;
while ((read = in.read()) != -1) {
out.write(read);
}
}
public static void closeStream(Closeable stream) {
try {
if (stream != null) {
stream.close();
}
} catch (IOException e) {
log.warn("Closing stream warn", e); //$NON-NLS-1$
}
}
@SuppressWarnings("ResultOfMethodCallIgnored")
public static void updateAllExistingImgTilesToOsmandFormat(File f) {
if (f.isDirectory()) {
for (File c : f.listFiles()) {
updateAllExistingImgTilesToOsmandFormat(c);
}
} else if (f.getName().endsWith(".png") || f.getName().endsWith(".jpg")) { //$NON-NLS-1$ //$NON-NLS-2$
f.renameTo(new File(f.getAbsolutePath() + ".tile")); //$NON-NLS-1$
} else if (f.getName().endsWith(".andnav2")) { //$NON-NLS-1$
f.renameTo(new File(f.getAbsolutePath().substring(0, f.getAbsolutePath().length() - ".andnav2".length()) + ".tile")); //$NON-NLS-1$ //$NON-NLS-2$
}
}
public static StringBuilder readFromInputStream(InputStream i) throws IOException {
StringBuilder responseBody = new StringBuilder();
responseBody.setLength(0);
if (i != null) {
BufferedReader in = new BufferedReader(new InputStreamReader(i, "UTF-8"), 256); //$NON-NLS-1$
String s;
boolean f = true;
while ((s = in.readLine()) != null) {
if (!f) {
responseBody.append("\n"); //$NON-NLS-1$
} else {
f = false;
}
responseBody.append(s);
}
}
return responseBody;
}
public static boolean removeAllFiles(File f) {
if (f == null) {
return false;
}
if (f.isDirectory()) {
File[] fs = f.listFiles();
if (fs != null) {
for (File c : fs) {
removeAllFiles(c);
}
}
return f.delete();
} else {
return f.delete();
}
}
public static long parseLongFromBytes(byte[] bytes, int offset) {
long o = 0xff & bytes[offset + 7];
o = o << 8 | (0xff & bytes[offset + 6]);
o = o << 8 | (0xff & bytes[offset + 5]);
o = o << 8 | (0xff & bytes[offset + 4]);
o = o << 8 | (0xff & bytes[offset + 3]);
o = o << 8 | (0xff & bytes[offset + 2]);
o = o << 8 | (0xff & bytes[offset + 1]);
o = o << 8 | (0xff & bytes[offset]);
return o;
}
public static void putLongToBytes(byte[] bytes, int offset, long l) {
bytes[offset] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 1] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 2] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 3] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 4] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 5] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 6] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 7] = (byte) (l & 0xff);
}
public static int parseIntFromBytes(byte[] bytes, int offset) {
int o = (0xff & bytes[offset + 3]) << 24;
o |= (0xff & bytes[offset + 2]) << 16;
o |= (0xff & bytes[offset + 1]) << 8;
o |= (0xff & bytes[offset]);
return o;
}
public static void putIntToBytes(byte[] bytes, int offset, int l) {
bytes[offset] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 1] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 2] = (byte) (l & 0xff);
l >>= 8;
bytes[offset + 3] = (byte) (l & 0xff);
}
public static void writeLongInt(OutputStream stream, long l) throws IOException {
stream.write((int) (l & 0xff));
l >>= 8;
stream.write((int) (l & 0xff));
l >>= 8;
stream.write((int) (l & 0xff));
l >>= 8;
stream.write((int) (l & 0xff));
l >>= 8;
stream.write((int) (l & 0xff));
l >>= 8;
stream.write((int) (l & 0xff));
l >>= 8;
stream.write((int) (l & 0xff));
l >>= 8;
stream.write((int) (l & 0xff));
}
public static void writeInt(OutputStream stream, int l) throws IOException {
stream.write(l & 0xff);
l >>= 8;
stream.write(l & 0xff);
l >>= 8;
stream.write(l & 0xff);
l >>= 8;
stream.write(l & 0xff);
}
public static void writeSmallInt(OutputStream stream, int l) throws IOException {
stream.write(l & 0xff);
l >>= 8;
stream.write(l & 0xff);
}
public static int parseSmallIntFromBytes(byte[] bytes, int offset) {
int s = (0xff & bytes[offset + 1]) << 8;
s |= (0xff & bytes[offset]);
return s;
}
public static void putSmallIntBytes(byte[] bytes, int offset, int s) {
bytes[offset] = (byte) (s & 0xff);
s >>= 8;
bytes[offset + 1] = (byte) (s & 0xff);
}
public static boolean containsDigit(String name) {
for (int i = 0; i < name.length(); i++) {
if (Character.isDigit(name.charAt(i))) {
return true;
}
}
return false;
}
public static String formatDuration(int seconds, boolean fullForm) {
String sec;
if (seconds % 60 < 10) {
sec = "0" + (seconds % 60);
} else {
sec = (seconds % 60) + "";
}
int minutes = seconds / 60;
if ((!fullForm) && (minutes < 60)) {
return minutes + ":" + sec;
} else {
String min;
if (minutes % 60 < 10) {
min = "0" + (minutes % 60);
} else {
min = (minutes % 60) + "";
}
int hours = minutes / 60;
return hours + ":" + min + ":" + sec;
}
}
public static String formatMinutesDuration(int minutes) {
if (minutes < 60) {
return String.valueOf(minutes);
} else {
int min = minutes % 60;
int hours = minutes / 60;
return String.format(Locale.UK, "%02d:%02d", hours, min);
}
}
public static <T extends Enum<T>> T parseEnumValue(T[] cl, String val, T defaultValue) {
for (T aCl : cl) {
if (aCl.name().equalsIgnoreCase(val)) {
return aCl;
}
}
return defaultValue;
}
public static String colorToString(int color) {
if ((0xFF000000 & color) == 0xFF000000) {
return "#" + format(6, Integer.toHexString(color & 0x00FFFFFF)); //$NON-NLS-1$
} else {
return "#" + format(8, Integer.toHexString(color)); //$NON-NLS-1$
}
}
private static String format(int i, String hexString) {
while (hexString.length() < i) {
hexString = "0" + hexString;
}
return hexString;
}
public static int getRainbowColor(double percent) {
// Given an input percentage (0.0-1.0) this will produce a colour from a "wide rainbow"
// from purple (low) to red(high). This is useful for producing value-based colourations (e.g., altitude)
double a = (1. - percent) * 5.;
int X = (int) Math.floor(a);
int Y = (int) (Math.floor(255 * (a - X)));
switch (X) {
case 0: return 0xFFFF0000 + (Y << 8);
case 1: return 0xFF00FF00 + ((255 - Y) << 16);
case 2: return 0xFF00FF00 + Y;
case 3: return 0xFF0000FF + ((255 - Y) << 8);
case 4: return 0xFF0000FF + (Y << 16);
}
return 0xFFFF00FF;
}
public static int compare(int x, int y) {
return (x < y) ? -1 : ((x == y) ? 0 : 1);
}
public static int compare(long x, long y) {
return (x < y) ? -1 : ((x == y) ? 0 : 1);
}
}