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A general programming library in Java
/*
* Copyright (c) 2018, Haiyang Li.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.landawn.abacus.util;
import com.landawn.abacus.util.function.BooleanSupplier;
import com.landawn.abacus.util.function.ByteSupplier;
import com.landawn.abacus.util.function.CharSupplier;
import com.landawn.abacus.util.function.DoubleSupplier;
import com.landawn.abacus.util.function.FloatSupplier;
import com.landawn.abacus.util.function.IntSupplier;
import com.landawn.abacus.util.function.LongSupplier;
import com.landawn.abacus.util.function.ShortSupplier;
public final class Primitives {
// ...
static final BiMap, Class> PRIMITIVE_2_WRAPPER = new BiMap<>();
static {
PRIMITIVE_2_WRAPPER.put(boolean.class, Boolean.class);
PRIMITIVE_2_WRAPPER.put(char.class, Character.class);
PRIMITIVE_2_WRAPPER.put(byte.class, Byte.class);
PRIMITIVE_2_WRAPPER.put(short.class, Short.class);
PRIMITIVE_2_WRAPPER.put(int.class, Integer.class);
PRIMITIVE_2_WRAPPER.put(long.class, Long.class);
PRIMITIVE_2_WRAPPER.put(float.class, Float.class);
PRIMITIVE_2_WRAPPER.put(double.class, Double.class);
PRIMITIVE_2_WRAPPER.put(boolean[].class, Boolean[].class);
PRIMITIVE_2_WRAPPER.put(char[].class, Character[].class);
PRIMITIVE_2_WRAPPER.put(byte[].class, Byte[].class);
PRIMITIVE_2_WRAPPER.put(short[].class, Short[].class);
PRIMITIVE_2_WRAPPER.put(int[].class, Integer[].class);
PRIMITIVE_2_WRAPPER.put(long[].class, Long[].class);
PRIMITIVE_2_WRAPPER.put(float[].class, Float[].class);
PRIMITIVE_2_WRAPPER.put(double[].class, Double[].class);
}
private Primitives() {
// utility class.
}
public static boolean isPrimitiveType(final Class cls) {
N.checkArgNotNull(cls, "cls");
return N.typeOf(cls).isPrimitiveType();
}
public static boolean isWrapperType(final Class cls) {
N.checkArgNotNull(cls, "cls");
return N.typeOf(cls).isPrimitiveWrapper();
}
public static boolean isPrimitiveArrayType(final Class cls) {
N.checkArgNotNull(cls, "cls");
return N.typeOf(cls).isPrimitiveArray();
}
/**
* Returns the corresponding wrapper type of {@code type} if it is a primitive type; otherwise
* returns {@code type} itself. Idempotent.
*
*
* wrap(int.class) == Integer.class
* wrap(Integer.class) == Integer.class
* wrap(String.class) == String.class
*
*/
public static Class wrap(final Class cls) {
N.checkArgNotNull(cls, "cls");
final Class wrapped = PRIMITIVE_2_WRAPPER.get(cls);
return wrapped == null ? cls : wrapped;
}
/**
* Returns the corresponding primitive type of {@code type} if it is a wrapper type; otherwise
* returns {@code type} itself. Idempotent.
*
*
* unwrap(Integer.class) == int.class
* unwrap(int.class) == int.class
* unwrap(String.class) == String.class
*
*/
public static Class unwrap(final Class cls) {
N.checkArgNotNull(cls, "cls");
Class unwrapped = PRIMITIVE_2_WRAPPER.getByValue(cls);
return unwrapped == null ? cls : unwrapped;
}
public static boolean unboxOrDefault(Boolean b) {
if (b == null) {
return false;
}
return b.booleanValue();
}
public static boolean unboxOrDefault(Boolean b, boolean defaultForNull) {
if (b == null) {
return defaultForNull;
}
return b.booleanValue();
}
public static char unboxOrDefault(Character c) {
if (c == null) {
return N.CHAR_0;
}
return c.charValue();
}
public static char unboxOrDefault(Character c, char defaultForNull) {
if (c == null) {
return defaultForNull;
}
return c.charValue();
}
public static byte unboxOrDefault(Byte b) {
if (b == null) {
return (byte) 0;
}
return b.byteValue();
}
public static byte unboxOrDefault(Byte b, byte defaultForNull) {
if (b == null) {
return defaultForNull;
}
return b.byteValue();
}
public static short unboxOrDefault(Short b) {
if (b == null) {
return (short) 0;
}
return b.shortValue();
}
public static short unboxOrDefault(Short b, short defaultForNull) {
if (b == null) {
return defaultForNull;
}
return b.shortValue();
}
public static int unboxOrDefault(Integer b) {
if (b == null) {
return 0;
}
return b.intValue();
}
public static int unboxOrDefault(Integer b, int defaultForNull) {
if (b == null) {
return defaultForNull;
}
return b.intValue();
}
public static long unboxOrDefault(Long b) {
if (b == null) {
return 0;
}
return b.longValue();
}
public static long unboxOrDefault(Long b, long defaultForNull) {
if (b == null) {
return defaultForNull;
}
return b.longValue();
}
public static float unboxOrDefault(Float b) {
if (b == null) {
return 0;
}
return b.floatValue();
}
public static float unboxOrDefault(Float b, float defaultForNull) {
if (b == null) {
return defaultForNull;
}
return b.floatValue();
}
public static double unboxOrDefault(Double b) {
if (b == null) {
return 0;
}
return b.doubleValue();
}
public static double unboxOrDefault(Double b, double defaultForNull) {
if (b == null) {
return defaultForNull;
}
return b.doubleValue();
}
public static boolean unboxOrGet(Boolean b, BooleanSupplier supplierForNull) {
if (b == null) {
return supplierForNull.getAsBoolean();
}
return b.booleanValue();
}
public static char unboxOrGet(Character b, CharSupplier supplierForNull) {
if (b == null) {
return supplierForNull.getAsChar();
}
return b.charValue();
}
public static byte unboxOrGet(Byte b, ByteSupplier supplierForNull) {
if (b == null) {
return supplierForNull.getAsByte();
}
return b.byteValue();
}
public static short unboxOrGet(Short b, ShortSupplier supplierForNull) {
if (b == null) {
return supplierForNull.getAsShort();
}
return b.shortValue();
}
public static int unboxOrGet(Integer b, IntSupplier supplierForNull) {
if (b == null) {
return supplierForNull.getAsInt();
}
return b.intValue();
}
public static long unboxOrGet(Long b, LongSupplier supplierForNull) {
if (b == null) {
return supplierForNull.getAsLong();
}
return b.longValue();
}
public static float unboxOrGet(Float b, FloatSupplier supplierForNull) {
if (b == null) {
return supplierForNull.getAsFloat();
}
return b.floatValue();
}
public static double unboxOrGet(Double b, DoubleSupplier supplierForNull) {
if (b == null) {
return supplierForNull.getAsDouble();
}
return b.doubleValue();
}
// TODO
public static final class Ints {
private Ints() {
// utility class.
}
}
// TODO
public static final class Longs {
private Longs() {
// utility class.
}
}
// TODO
public static final class Doubles {
private Doubles() {
// utility class.
}
}
}
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