添加 checkAllNotNull 方法

src/main/java/xyz/zhouxy/plusone/commons/util/PreconditionsExt.java

@@ -18,6 +18,8 @@ package xyz.zhouxy.plusone.commons.util;
 
 import java.util.function.Supplier;
 
+import com.google.common.base.Preconditions;
+
 /**
  * Guava Preconditions 的扩展。
  *
@@ -33,6 +35,21 @@ public class PreconditionsExt {
         }
     }
 
+    public static <T, E extends Throwable> void checkAllNotNull(Iterable<T> values) throws E {
+        Preconditions.checkNotNull(values);
+        for (T item : values) {
+            Preconditions.checkNotNull(item);
+        }
+    }
+
+    @SafeVarargs
+    public static <T, E extends Throwable> void checkAllNotNull(T... values) throws E {
+        Preconditions.checkNotNull(values);
+        for (T item : values) {
+            Preconditions.checkNotNull(item);
+        }
+    }
+
     private PreconditionsExt() {
         throw new IllegalStateException("Utility class");
     }

src/test/java/xyz/zhouxy/plusone/commons/util/PreconditionsExtTests.java

@@ -0,0 +1,54 @@
+package xyz.zhouxy.plusone.commons.util;
+
+import org.junit.jupiter.api.Test;
+import xyz.zhouxy.plusone.commons.exception.BaseException;
+
+import java.util.Arrays;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class PreconditionsExtTests {
+
+    @Test
+    void testCheck() {
+        assertThrows(TestException.class, () -> {
+            PreconditionsExt.check(false, () -> new TestException("Test error message."));
+        });
+    }
+
+    @Test
+    void testCheckAllNotNull() {
+        assertThrows(NullPointerException.class, () -> {
+            Object[] array = null;
+            PreconditionsExt.checkAllNotNull(array);
+        });
+        assertThrows(NullPointerException.class,
+                () -> PreconditionsExt.checkAllNotNull(new Object[]{new Object(), null}));
+        assertThrows(NullPointerException.class,
+                () -> PreconditionsExt.checkAllNotNull(new Object(), null));
+        assertThrows(NullPointerException.class,
+                () -> PreconditionsExt.checkAllNotNull(Arrays.asList(new Object(), null)));
+
+        PreconditionsExt.checkAllNotNull(new Object[]{new Object(), "Test"});
+        PreconditionsExt.checkAllNotNull(new Object(), "Test");
+        PreconditionsExt.checkAllNotNull(Arrays.asList(new Object(), "Test"));
+    }
+}
+
+class TestException extends BaseException {
+    private static final long serialVersionUID = -8808661764734834820L;
+
+    private static final String ERR_CODE = "TEST";
+
+    protected TestException(String msg) {
+        super(ERR_CODE, msg);
+    }
+
+    protected TestException(Throwable cause) {
+        super(ERR_CODE, cause);
+    }
+
+    protected TestException(String msg, Throwable cause) {
+        super(ERR_CODE, msg, cause);
+    }
+}