NumbersUtil cleanup

- removed methods that were not used
- parseLong, parseInt and parseFloat replaced with the commons-lang NumberUtils call
- Test for the remaining methods

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>
Signed-off-by: Hugo Trippaers <htrippaers@schubergphilis.com>
This commit is contained in:
Laszlo Hornyak 2013-09-27 23:43:49 +02:00 committed by Hugo Trippaers
parent 4590813836
commit b44bc9db02
2 changed files with 29 additions and 150 deletions

View File

@ -23,135 +23,21 @@ import java.util.Date;
import java.util.Formatter;
import java.util.Locale;
import org.apache.commons.lang.math.NumberUtils;
import com.cloud.utils.exception.CloudRuntimeException;
public class NumbersUtil {
public static long parseLong(String s, long defaultValue) {
if (s == null) {
return defaultValue;
}
try {
return Long.parseLong(s);
} catch (NumberFormatException e) {
return defaultValue;
}
return NumberUtils.toLong(s, defaultValue);
}
public static int parseInt(String s, int defaultValue) {
if (s == null) {
return defaultValue;
}
try {
return Integer.parseInt(s);
} catch (NumberFormatException e) {
return defaultValue;
}
return NumberUtils.toInt(s, defaultValue);
}
public static float parseFloat(String s, float defaultValue) {
if (s == null) {
return defaultValue;
}
try {
return Float.parseFloat(s);
} catch (NumberFormatException e) {
return defaultValue;
}
}
/**
* Converts bytes to short on input.
*/
public static int bytesToShort(byte b[]) {
return (b[1] & 0xff) | ((b[0] << 8) & 0xff00);
}
public static int bytesToShort(byte b[], int pos) {
return (b[pos + 1] & 0xff) | ((b[pos] << 8) & 0xff00);
}
/**
* Converts bytes to long on input.
*/
public static int bytesToInt(byte b[]) {
return bytesToInt(b, 0);
}
public static int bytesToInt(byte b[], int pos) {
int value = b[pos + 3] & 0xff;
value |= (b[pos + 2] << 8) & 0xff00;
value |= (b[pos + 1] << 16) & 0xff0000;
value |= (b[pos] << 24) & 0xff000000;
return value;
}
/**
* Converts a short to a series of bytes for output. Must be 2 bytes long.
*/
public static byte[] shortToBytes(int n) {
byte b[] = new byte[2];
b[1] = (byte)(n & 0xff);
b[0] = (byte)((n >> 8) & 0xff);
return b;
}
public static char encodeByte(int b) {
if (b < 10) {
return (char)(b + '0');
} else if (b < 36) {
return (char)(b - 10 + 'A');
} else if (b < 62) {
return (char)(b - 36 + 'a');
} else if (b == 62) {
return '(';
} else if (b == 63) {
return ')';
}
return (char)255;
}
public static int decodeByte(char b) {
if (b >= 'A' && b <= 'Z') {
return b + 10 - 'A';
} else if (b >= 'a' && b <= 'z') {
return b + 36 - 'a';
} else if (b >= '0' && b <= '9') {
return b - '0';
} else if (b == ')') {
return 63;
} else if (b == '(') {
return 62;
}
return -1;
}
/**
* Converts a long to a series of bytes for output. Must be 4 bytes long.
*/
public static byte[] intToBytes(int n) {
byte b[] = new byte[4];
b[3] = (byte)(n & 0xff);
b[2] = (byte)((n >> 8) & 0xff);
b[1] = (byte)((n >> 16) & 0xff);
b[0] = (byte)((n >> 24) & 0xff);
return b;
}
/**
* Sorry for the bad naming but the longToBytes is already taken. Returns an 8 byte long byte array.
**/
public static byte[] longToBytes(long n) {
byte b[] = new byte[8];
b[7] = (byte)(n & 0xff);
b[6] = (byte)((n >> 8) & 0xff);
b[5] = (byte)((n >> 16) & 0xff);
b[4] = (byte)((n >> 24) & 0xff);
b[3] = (byte)((n >> 32) & 0xff);
b[2] = (byte)((n >> 40) & 0xff);
b[1] = (byte)((n >> 48) & 0xff);
b[0] = (byte)((n >> 56) & 0xff);
return b;
return NumberUtils.toFloat(s, defaultValue);
}
/**
@ -162,19 +48,7 @@ public class NumbersUtil {
}
public static long bytesToLong(byte b[], int pos) {
ByteBuffer buf = ByteBuffer.wrap(b, pos, 8);
return buf.getLong();
/*
* long value = b[pos + 7] & 0xff;
* value |= (b[pos + 6] << 8) & 0xff00;
* value |= (b[pos + 5] << 16) & 0xff0000;
* value |= (b[pos + 4] << 24) & 0xff000000;
* value |= (b[pos + 3] << 32) & 0xff00000000;
* value |= (b[pos + 2] << 40) & 0xff0000000000;
* value |= (b[pos + 1] << 48) & 0xff000000000000;
* value |= (b[pos + 0] << 56) & 0xff00000000000000;
* return value;
*/
return ByteBuffer.wrap(b, pos, 8).getLong();
}
/**
@ -198,28 +72,22 @@ public class NumbersUtil {
protected static final long TB = 1024 * GB;
public static String toReadableSize(long bytes) {
if (bytes <= KB && bytes >= 0) {
if (bytes < KB && bytes >= 0) {
return Long.toString(bytes) + " bytes";
}
StringBuilder builder = new StringBuilder();
Formatter format = new Formatter(builder, Locale.getDefault());
if (bytes < MB) {
format.format("%.2f KB", (float)bytes / (float)KB);
format.close();
return builder.toString();
} else if (bytes < GB) {
format.format("%.2f MB", (float)bytes / (float)MB);
format.close();
return builder.toString();
} else if (bytes < TB) {
format.format("%.2f GB", (float)bytes / (float)GB);
format.close();
return builder.toString();
} else {
format.format("%.4f TB", (float)bytes / (float)TB);
format.close();
return builder.toString();
}
format.close();
return builder.toString();
}
/**
@ -261,9 +129,4 @@ public class NumbersUtil {
public static int hash(long value) {
return (int)(value ^ (value >>> 32));
}
public static void main(String[] args) {
long interval = parseInterval(args[0], -1);
System.out.println(args[0] + " is " + interval);
}
}

View File

@ -23,9 +23,25 @@ import org.junit.Test;
public class NumbersUtilTest {
@Test
public void formattingCheck() {
long size = 1024 * 1024 * 1024;
String formatted = NumbersUtil.toReadableSize(size);
assertEquals("1.00 GB", formatted);
public void toReadableSize() {
assertEquals("1.0000 TB",
NumbersUtil.toReadableSize((1024l * 1024l * 1024l * 1024l)));
assertEquals("1.00 GB",
NumbersUtil.toReadableSize((long) (1024 * 1024 * 1024)));
assertEquals("1.00 MB",
NumbersUtil.toReadableSize((long) (1024 * 1024)));
assertEquals("1.00 KB", NumbersUtil.toReadableSize((long) (1024)));
assertEquals("1023 bytes", NumbersUtil.toReadableSize((long) (1023)));
}
@Test
public void bytesToLong() {
assertEquals(0,
NumbersUtil.bytesToLong(new byte[] { 0, 0, 0, 0, 0, 0, 0, 0 }));
assertEquals(1,
NumbersUtil.bytesToLong(new byte[] { 0, 0, 0, 0, 0, 0, 0, 1 }));
assertEquals(257,
NumbersUtil.bytesToLong(new byte[] { 0, 0, 0, 0, 0, 0, 1, 1 }));
}
}