iSharkFly-Docs
/
java-tutorials
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add primitive type check method and unit tests

This commit is contained in:
joe zhang 2020-07-28 21:12:15 +08:00
parent 4128525f00
commit 45be1b6045
3 changed files with 87 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
core-java-modules/core-java-lang-oop-types/pom.xml
View File

@ -12,4 +12,12 @@
<artifactId>core-java-lang-oop-types</artifactId>
<name>core-java-lang-oop-types</name>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
</dependencies>
</project>

38
core-java-modules/core-java-lang-oop-types/src/main/java/com/baeldung/primitivetype/PrimitiveTypeUtil.java Normal file
View File

@ -0,0 +1,38 @@
package com.baeldung.primitivetype;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.lang3.ClassUtils;
import com.google.common.primitives.Primitives;
public class PrimitiveTypeUtil {
private static final Map<Class<?>, Class<?>> WRAPPER_TYPE_MAP;
static {
WRAPPER_TYPE_MAP = new HashMap<Class<?>, 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 boolean isPrimitiveTypeByCommansLang(Object source) {
return ClassUtils.isPrimitiveOrWrapper(source.getClass());
}
public boolean isPrimitiveTypeByGuava(Object source) {
return Primitives.isWrapperType(source.getClass());
}
public boolean isPrimitiveType(Object source) {
return WRAPPER_TYPE_MAP.containsKey(source.getClass());
}
}

41
core-java-modules/core-java-lang-oop-types/src/test/java/com/baeldung/primitivetype/PrimitiveTypeUtilTest.java Normal file
View File

@ -0,0 +1,41 @@
package com.baeldung.primitivetype;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.Before;
import org.junit.Test;
public class PrimitiveTypeUtilTest {
private PrimitiveTypeUtil primitiveTypeUtil;
private boolean booleanVal = false;
private Long longWrapper = 1L;
private String nonPrimitiveVal = "Test";
@Before
public void setup() {
primitiveTypeUtil = new PrimitiveTypeUtil();
}
@Test
public void givenObjectWhenCheckWithGuavaShouldValidate() {
assertTrue(primitiveTypeUtil.isPrimitiveTypeByGuava(booleanVal));
assertTrue(primitiveTypeUtil.isPrimitiveTypeByGuava(longWrapper));
assertFalse(primitiveTypeUtil.isPrimitiveTypeByGuava(nonPrimitiveVal));
}
@Test
public void givenObjectWhenCheckWithCommansLangShouldValidate() {
assertTrue(primitiveTypeUtil.isPrimitiveTypeByCommansLang(booleanVal));
assertTrue(primitiveTypeUtil.isPrimitiveTypeByCommansLang(longWrapper));
assertFalse(primitiveTypeUtil.isPrimitiveTypeByCommansLang(nonPrimitiveVal));
}
@Test
public void givenPrimitiveOrWrapperWhenCheckWithCustomMethodShouldReturnTrue() {
assertTrue(primitiveTypeUtil.isPrimitiveType(booleanVal));
assertTrue(primitiveTypeUtil.isPrimitiveType(longWrapper));
assertFalse(primitiveTypeUtil.isPrimitiveType(nonPrimitiveVal));
}
}