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Convert.java
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255 lines (222 loc) · 5.69 KB
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package Utils;
/**
*
* @author kdgyun
*
* @version 1.1.0
* @since 1.1.0
*
* {@link https://st-lab.tistory.com}
* {@link https://github.com/kdgyun}
*
*/
import java.util.stream.DoubleStream;
import java.util.stream.IntStream;
import java.util.stream.LongStream;
public class Convert {
private static final Byte[] EMPTY_BYTE_OBJECT_ARRAY = new Byte[0];
private static final Character[] EMPTY_CHAR_OBJECT_ARRAY = new Character[0];
private static final Short[] EMPTY_SHORT_OBJECT_ARRAY = new Short[0];
private static final Integer[] EMPTY_INT_OBJECT_ARRAY = new Integer[0];
private static final Long[] EMPTY_LONG_OBJECT_ARRAY = new Long[0];
private static final Float[] EMPTY_FLOAT_OBJECT_ARRAY = new Float[0];
private static final Double[] EMPTY_DOUBLE_OBJECT_ARRAY = new Double[0];
public static Byte[] toByteArray(byte[] a) {
return toByteArray(a, a.length);
}
private static final Byte[] toByteArray(byte[] a, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return EMPTY_BYTE_OBJECT_ARRAY;
}
final Byte[] res = new Byte[size];
int i = 0;
for (byte v : a) {
res[i++] = v;
}
return res;
}
public static void tobyteArray(Byte[] a, byte[] dest) {
tobyteArray(a, dest, dest.length);
}
private static final void tobyteArray(Byte[] a, byte[] dest, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return;
}
int i = 0;
for (byte v : a) {
dest[i++] = v;
}
}
public static Character[] toCharacterArray(char[] a) {
return toCharacterArray(a, a.length);
}
private static final Character[] toCharacterArray(char[] a, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return EMPTY_CHAR_OBJECT_ARRAY;
}
final Character[] res = new Character[size];
int i = 0;
for (char v : a) {
res[i++] = v;
}
return res;
}
public static void tocharArray(Character[] a, char[] dest) {
tocharArray(a, dest, dest.length);
}
private static final void tocharArray(Character[] a, char[] dest, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return;
}
int i = 0;
for (char v : a) {
dest[i++] = v;
}
}
public static Short[] toShortArray(short[] a) {
return toShortArray(a, a.length);
}
private static final Short[] toShortArray(short[] a, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return EMPTY_SHORT_OBJECT_ARRAY;
}
final Short[] res = new Short[size];
int i = 0;
for (short v : a) {
res[i++] = v;
}
return res;
}
public static void toshortArray(Short[] a, short[] dest) {
toshortArray(a, dest, dest.length);
}
private static final void toshortArray(Short[] a, short[] dest, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return;
}
int i = 0;
for (short v : a) {
dest[i++] = v;
}
}
public static Integer[] toIntegerArray(int[] a) {
return toIntegerArray(a, a.length);
}
private static final Integer[] toIntegerArray(int[] a, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return EMPTY_INT_OBJECT_ARRAY;
}
final Integer[] res = IntStream.of(a).boxed().toArray(Integer[]::new);
return res;
}
public static void tointtArray(Integer[] a, int[] dest) {
tointtArray(a, dest, dest.length);
}
private static final void tointtArray(Integer[] a, int[] dest, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return;
}
int i = 0;
for (int v : a) {
dest[i++] = v;
}
}
public static Long[] toLongArray(long[] a) {
return toLongArray(a, a.length);
}
private static final Long[] toLongArray(long[] a, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return EMPTY_LONG_OBJECT_ARRAY;
}
final Long[] res = LongStream.of(a).boxed().toArray(Long[]::new);
return res;
}
public static void tolongArray(Long[] a, long[] dest) {
tolongArray(a, dest, dest.length);
}
private static final void tolongArray(Long[] a, long[] dest, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return;
}
int i = 0;
for (long v : a) {
dest[i++] = v;
}
}
public static Float[] toFloatArray(float[] a) {
return toFloatArray(a, a.length);
}
private static final Float[] toFloatArray(float[] a, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return EMPTY_FLOAT_OBJECT_ARRAY;
}
final Float[] res = new Float[size];
int i = 0;
for (float v : a) {
res[i++] = v;
}
return res;
}
public static void toflostArray(Float[] a, float[] dest) {
toflostArray(a, dest, dest.length);
}
private static final void toflostArray(Float[] a, float[] dest, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return;
}
int i = 0;
for (float v : a) {
dest[i++] = v;
}
}
public static Double[] toDoubleArray(double[] a) {
return toDoubleArray(a, a.length);
}
private static final Double[] toDoubleArray(double[] a, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return EMPTY_DOUBLE_OBJECT_ARRAY;
}
final Double[] res = DoubleStream.of(a).boxed().toArray(Double[]::new);
return res;
}
public static void todoubleArray(Double[] a, double[] dest) {
todoubleArray(a, dest, dest.length);
}
private static final void todoubleArray(Double[] a, double[] dest, int size) {
if (a == null) {
throw new NullPointerException();
} else if (size == 0) {
return;
}
int i = 0;
for (double v : a) {
dest[i++] = v;
}
}
}