1 /* 2 * Copyright (c) 2007 Mockito contributors 3 * This program is made available under the terms of the MIT License. 4 */ 5 package org.mockito.internal.util; 6 7 import java.util.HashMap; 8 import java.util.Map; 9 10 @SuppressWarnings("unchecked") 11 public final class Primitives { 12 13 private static final Map<Class<?>, Class<?>> PRIMITIVE_TYPES = new HashMap<>(); 14 private static final Map<Class<?>, Object> PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES = 15 new HashMap<>(); 16 17 /** 18 * Returns the primitive type of the given class. 19 * <p/> 20 * The passed class can be any class : <code>boolean.class</code>, <code>Integer.class</code> 21 * in witch case this method will return <code>boolean.class</code>, even <code>SomeObject.class</code> 22 * in which case <code>null</code> will be returned. 23 * 24 * @param clazz The class from which primitive type has to be retrieved 25 * @param <T> The type 26 * @return The primitive type if relevant, otherwise <code>null</code> 27 */ primitiveTypeOf(Class<T> clazz)28 public static <T> Class<T> primitiveTypeOf(Class<T> clazz) { 29 if (clazz.isPrimitive()) { 30 return clazz; 31 } 32 return (Class<T>) PRIMITIVE_TYPES.get(clazz); 33 } 34 35 /** 36 * Indicates if the given class is primitive type or a primitive wrapper. 37 * 38 * @param type The type to check 39 * @return <code>true</code> if primitive or wrapper, <code>false</code> otherwise. 40 */ isPrimitiveOrWrapper(Class<?> type)41 public static boolean isPrimitiveOrWrapper(Class<?> type) { 42 return PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.containsKey(type); 43 } 44 isAssignableFromWrapper(Class<?> valueClass, Class<?> referenceType)45 public static boolean isAssignableFromWrapper(Class<?> valueClass, Class<?> referenceType) { 46 if (isPrimitiveOrWrapper(valueClass) && isPrimitiveOrWrapper(referenceType)) { 47 return Primitives.primitiveTypeOf(valueClass) 48 .isAssignableFrom(Primitives.primitiveTypeOf(referenceType)); 49 } 50 return false; 51 } 52 53 /** 54 * Returns the boxed default value for a primitive or a primitive wrapper. 55 * 56 * @param primitiveOrWrapperType The type to lookup the default value 57 * @return The boxed default values as defined in Java Language Specification, 58 * <code>null</code> if the type is neither a primitive nor a wrapper 59 */ defaultValue(Class<T> primitiveOrWrapperType)60 public static <T> T defaultValue(Class<T> primitiveOrWrapperType) { 61 return (T) PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.get(primitiveOrWrapperType); 62 } 63 64 static { PRIMITIVE_TYPES.put(Boolean.class, Boolean.TYPE)65 PRIMITIVE_TYPES.put(Boolean.class, Boolean.TYPE); PRIMITIVE_TYPES.put(Character.class, Character.TYPE)66 PRIMITIVE_TYPES.put(Character.class, Character.TYPE); PRIMITIVE_TYPES.put(Byte.class, Byte.TYPE)67 PRIMITIVE_TYPES.put(Byte.class, Byte.TYPE); PRIMITIVE_TYPES.put(Short.class, Short.TYPE)68 PRIMITIVE_TYPES.put(Short.class, Short.TYPE); PRIMITIVE_TYPES.put(Integer.class, Integer.TYPE)69 PRIMITIVE_TYPES.put(Integer.class, Integer.TYPE); PRIMITIVE_TYPES.put(Long.class, Long.TYPE)70 PRIMITIVE_TYPES.put(Long.class, Long.TYPE); PRIMITIVE_TYPES.put(Float.class, Float.TYPE)71 PRIMITIVE_TYPES.put(Float.class, Float.TYPE); PRIMITIVE_TYPES.put(Double.class, Double.TYPE)72 PRIMITIVE_TYPES.put(Double.class, Double.TYPE); 73 } 74 75 static { PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Boolean.class, false)76 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Boolean.class, false); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Character.class, '\\u0000')77 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Character.class, '\u0000'); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Byte.class, (byte) 0)78 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Byte.class, (byte) 0); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Short.class, (short) 0)79 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Short.class, (short) 0); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Integer.class, 0)80 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Integer.class, 0); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Long.class, 0L)81 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Long.class, 0L); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Float.class, 0F)82 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Float.class, 0F); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Double.class, 0D)83 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(Double.class, 0D); 84 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(boolean.class, false)85 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(boolean.class, false); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(char.class, '\\u0000')86 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(char.class, '\u0000'); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(byte.class, (byte) 0)87 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(byte.class, (byte) 0); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(short.class, (short) 0)88 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(short.class, (short) 0); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(int.class, 0)89 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(int.class, 0); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(long.class, 0L)90 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(long.class, 0L); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(float.class, 0F)91 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(float.class, 0F); PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(double.class, 0D)92 PRIMITIVE_OR_WRAPPER_DEFAULT_VALUES.put(double.class, 0D); 93 } 94 Primitives()95 private Primitives() {} 96 } 97