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完善LambdaUtil

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This commit is contained in:
achao
2022-06-04 01:18:41 +08:00
committed by VampireAchao
parent ccc71cd61a
commit d5174b6b64
3 changed files with 52 additions and 18 deletions
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45
hutool-core/src/test/java/cn/hutool/core/lang/func/LambdaUtilTest.java
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@@ -6,7 +6,9 @@ import lombok.EqualsAndHashCode;
import org.junit.Assert;
import org.junit.Test;
import java.io.Serializable;
import java.lang.reflect.Array;
import java.util.Objects;
import java.util.stream.Stream;
@SuppressWarnings("unchecked")
@@ -14,13 +16,15 @@ public class LambdaUtilTest {
@Test
public void getMethodNameTest() {
final String methodName = LambdaUtil.getMethodName(MyTeacher::getAge);
Func1<MyTeacher, String> lambda = MyTeacher::getAge;
final String methodName = LambdaUtil.getMethodName(lambda);
Assert.assertEquals("getAge", methodName);
}
@Test
public void getFieldNameTest() {
final String fieldName = LambdaUtil.getFieldName(MyTeacher::getAge);
Func1<MyTeacher, String> lambda = MyTeacher::getAge;
final String fieldName = LambdaUtil.getFieldName(lambda);
Assert.assertEquals("age", fieldName);
}
@@ -40,20 +44,45 @@ public class LambdaUtilTest {
Assert.assertEquals(MyTeacher.class, ((Class<Array>) lambdaInfo.getReturnType()).getComponentType());
}, () -> {
// 引用静态方法
Func0<String> noArgsStaticMethod = MyTeacher::takeAge;
LambdaInfo lambdaInfo = LambdaUtil.resolve(noArgsStaticMethod);
Func0<String> lambda = MyTeacher::takeAge;
LambdaInfo lambdaInfo = LambdaUtil.resolve(lambda);
Assert.assertEquals(0, lambdaInfo.getParameterTypes().length);
Assert.assertEquals(String.class, lambdaInfo.getReturnType());
}, () -> {
// 引用特定对象的实例方法
Func0<String> instantiated = new MyTeacher()::getAge;
LambdaInfo lambdaInfo = LambdaUtil.resolve(instantiated);
Func0<String> lambda = new MyTeacher()::getAge;
LambdaInfo lambdaInfo = LambdaUtil.resolve(lambda);
Assert.assertEquals(0, lambdaInfo.getParameterTypes().length);
Assert.assertEquals(String.class, lambdaInfo.getReturnType());
}, () -> {
// 引用特定类型的任意对象的实例方法
Func1<MyTeacher, String> annoInstantiated = MyTeacher::getAge;
LambdaInfo lambdaInfo = LambdaUtil.resolve(annoInstantiated);
Func1<MyTeacher, String> lambda = MyTeacher::getAge;
LambdaInfo lambdaInfo = LambdaUtil.resolve(lambda);
Assert.assertEquals(0, lambdaInfo.getParameterTypes().length);
Assert.assertEquals(String.class, lambdaInfo.getReturnType());
}, () -> {
// 最最重要的！！！
Character character = '0';
Integer integer = 0;
SerThiCons<Object, Boolean, String> lambda = (obj, bool, str) -> {
Objects.nonNull(character);
Objects.nonNull(integer);
};
LambdaInfo lambdaInfo = LambdaUtil.resolve(lambda);
// 获取闭包使用的参数类型
Assert.assertEquals(Character.class, lambdaInfo.getParameterTypes()[0]);
Assert.assertEquals(Integer.class, lambdaInfo.getParameterTypes()[1]);
// 最后几个是原有lambda的参数类型
Assert.assertEquals(Object.class, lambdaInfo.getParameterTypes()[2]);
Assert.assertEquals(Boolean.class, lambdaInfo.getParameterTypes()[3]);
Assert.assertEquals(String.class, lambdaInfo.getParameterTypes()[4]);
Assert.assertEquals(void.class, lambdaInfo.getReturnType());
}).forEach(Runnable::run);
}
interface SerThiCons<P1, P2, P3> extends Consumer3<P1, P2, P3>, Serializable {
}
@Test