diff --git a/core-java-modules/core-java-lang-oop-types/pom.xml b/core-java-modules/core-java-lang-oop-types/pom.xml index 5555df4818..ee167bbae2 100644 --- a/core-java-modules/core-java-lang-oop-types/pom.xml +++ b/core-java-modules/core-java-lang-oop-types/pom.xml @@ -12,4 +12,12 @@ core-java-lang-oop-types core-java-lang-oop-types jar + + + + org.apache.commons + commons-lang3 + ${commons-lang3.version} + + \ No newline at end of file diff --git a/core-java-modules/core-java-lang-oop-types/src/main/java/com/baeldung/primitivetype/PrimitiveTypeUtil.java b/core-java-modules/core-java-lang-oop-types/src/main/java/com/baeldung/primitivetype/PrimitiveTypeUtil.java new file mode 100644 index 0000000000..ff70da1839 --- /dev/null +++ b/core-java-modules/core-java-lang-oop-types/src/main/java/com/baeldung/primitivetype/PrimitiveTypeUtil.java @@ -0,0 +1,26 @@ +package com.baeldung.primitivetype; + +import java.util.HashMap; +import java.util.Map; + +public class PrimitiveTypeUtil { + + private static final Map, Class> WRAPPER_TYPE_MAP; + static { + WRAPPER_TYPE_MAP = new HashMap, Class>(16); + WRAPPER_TYPE_MAP.put(Integer.class, int.class); + WRAPPER_TYPE_MAP.put(Byte.class, byte.class); + WRAPPER_TYPE_MAP.put(Character.class, char.class); + WRAPPER_TYPE_MAP.put(Boolean.class, boolean.class); + WRAPPER_TYPE_MAP.put(Double.class, double.class); + WRAPPER_TYPE_MAP.put(Float.class, float.class); + WRAPPER_TYPE_MAP.put(Long.class, long.class); + WRAPPER_TYPE_MAP.put(Short.class, short.class); + WRAPPER_TYPE_MAP.put(Void.class, void.class); + } + + public static boolean isPrimitiveType(Object source) { + return WRAPPER_TYPE_MAP.containsKey(source.getClass()); + } + +} diff --git a/core-java-modules/core-java-lang-oop-types/src/test/java/com/baeldung/primitivetype/PrimitiveTypeUnitTest.java b/core-java-modules/core-java-lang-oop-types/src/test/java/com/baeldung/primitivetype/PrimitiveTypeUnitTest.java new file mode 100644 index 0000000000..b9152d3674 --- /dev/null +++ b/core-java-modules/core-java-lang-oop-types/src/test/java/com/baeldung/primitivetype/PrimitiveTypeUnitTest.java @@ -0,0 +1,34 @@ +package com.baeldung.primitivetype; + +import static org.junit.Assert.assertFalse; +import static org.junit.Assert.assertTrue; + +import org.apache.commons.lang3.ClassUtils; +import org.apache.commons.lang3.StringUtils; +import org.junit.Test; + +import com.google.common.primitives.Primitives; + +public class PrimitiveTypeUnitTest { + + @Test + public void givenAClass_whenCheckWithPrimitiveTypeUtil_thenShouldValidate() { + assertTrue(PrimitiveTypeUtil.isPrimitiveType(false)); + assertTrue(PrimitiveTypeUtil.isPrimitiveType(1L)); + assertFalse(PrimitiveTypeUtil.isPrimitiveType(StringUtils.EMPTY)); + } + + @Test + public void givenAClass_whenCheckWithCommonsLang_thenShouldValidate() { + assertTrue(ClassUtils.isPrimitiveOrWrapper(Boolean.FALSE.getClass())); + assertTrue(ClassUtils.isPrimitiveOrWrapper(boolean.class)); + assertFalse(ClassUtils.isPrimitiveOrWrapper(StringUtils.EMPTY.getClass())); + } + + @Test + public void givenAClass_whenCheckWithGuava_thenShouldValidate() { + assertTrue(Primitives.isWrapperType(Boolean.FALSE.getClass())); + assertFalse(Primitives.isWrapperType(StringUtils.EMPTY.getClass())); + assertFalse(Primitives.isWrapperType(Boolean.TYPE.getClass())); + } +}