refactor: move default QA annotations to package 📝

Author: oldratlee

library/src/main/java/com/alibaba/dcm/DnsCache.java

@@ -1,9 +1,7 @@
 package com.alibaba.dcm;
 
-import edu.umd.cs.findbugs.annotations.ReturnValuesAreNonnullByDefault;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 
-import javax.annotation.ParametersAreNonnullByDefault;
 import javax.annotation.concurrent.Immutable;
 import java.io.Serializable;
 import java.util.ArrayList;
@@ -17,8 +15,6 @@
  * @since 1.2.0
  */
 @Immutable
-@ParametersAreNonnullByDefault
-@ReturnValuesAreNonnullByDefault
 public final class DnsCache implements Serializable {
     private static final long serialVersionUID = -8614746635950970028L;
 

library/src/main/java/com/alibaba/dcm/DnsCacheEntry.java

@@ -1,9 +1,7 @@
 package com.alibaba.dcm;
 
-import edu.umd.cs.findbugs.annotations.ReturnValuesAreNonnullByDefault;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 
-import javax.annotation.ParametersAreNonnullByDefault;
 import javax.annotation.concurrent.Immutable;
 import java.io.Serializable;
 import java.text.SimpleDateFormat;
@@ -18,8 +16,6 @@
  * @see DnsCache
  */
 @Immutable
-@ParametersAreNonnullByDefault
-@ReturnValuesAreNonnullByDefault
 public final class DnsCacheEntry implements Serializable {
     private static final long serialVersionUID = -7476648934387757732L;
 
@@ -114,6 +110,7 @@ public boolean equals(Object o) {
      * {@inheritDoc}
      */
     @Override
+    @SuppressFBWarnings("RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE")
     public int hashCode() {
         int result = host != null ? host.hashCode() : 0;
         result = 31 * result + Arrays.hashCode(ips);

library/src/main/java/com/alibaba/dcm/DnsCacheManipulator.java

@@ -1,13 +1,11 @@
 package com.alibaba.dcm;
 
 import com.alibaba.dcm.internal.InetAddressCacheUtilCommons;
-import com.alibaba.dcm.internal.InetAddressCacheUtilForOld;
 import com.alibaba.dcm.internal.InetAddressCacheUtilForNew;
-import edu.umd.cs.findbugs.annotations.ReturnValuesAreNonnullByDefault;
+import com.alibaba.dcm.internal.InetAddressCacheUtilForOld;
 import sun.net.InetAddressCachePolicy;
 
 import javax.annotation.Nullable;
-import javax.annotation.ParametersAreNonnullByDefault;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.util.Arrays;
@@ -30,8 +28,6 @@
  * @see DnsCacheEntry
  * @see DnsCacheManipulatorException
  */
-@ParametersAreNonnullByDefault
-@ReturnValuesAreNonnullByDefault
 @SuppressWarnings("JavadocReference")
 public final class DnsCacheManipulator {
     /**

library/src/main/java/com/alibaba/dcm/internal/InetAddressCacheUtilCommons.java

@@ -1,11 +1,9 @@
 package com.alibaba.dcm.internal;
 
-import edu.umd.cs.findbugs.annotations.ReturnValuesAreNonnullByDefault;
 import org.jetbrains.annotations.ApiStatus;
 import sun.net.InetAddressCachePolicy;
 
 import javax.annotation.Nullable;
-import javax.annotation.ParametersAreNonnullByDefault;
 import java.lang.reflect.Field;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
@@ -16,8 +14,6 @@
  * @author Jerry Lee (oldratlee at gmail dot com)
  * @since 1.6.0
  */
-@ParametersAreNonnullByDefault
-@ReturnValuesAreNonnullByDefault
 @ApiStatus.Internal
 @SuppressWarnings("JavadocReference")
 public final class InetAddressCacheUtilCommons {

library/src/main/java/com/alibaba/dcm/internal/InetAddressCacheUtilForNew.java

@@ -2,11 +2,9 @@
 
 import com.alibaba.dcm.DnsCache;
 import com.alibaba.dcm.DnsCacheEntry;
-import edu.umd.cs.findbugs.annotations.ReturnValuesAreNonnullByDefault;
 import org.jetbrains.annotations.ApiStatus;
 
 import javax.annotation.Nullable;
-import javax.annotation.ParametersAreNonnullByDefault;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
@@ -19,7 +17,9 @@
 import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.ConcurrentSkipListSet;
 
-import static com.alibaba.dcm.internal.InetAddressCacheUtilCommons.*;
+import static com.alibaba.dcm.internal.InetAddressCacheUtilCommons.NEVER_EXPIRATION;
+import static com.alibaba.dcm.internal.InetAddressCacheUtilCommons.getIpFromInetAddress;
+import static com.alibaba.dcm.internal.InetAddressCacheUtilCommons.toInetAddressArray;
 import static com.alibaba.dcm.internal.TimeUtil.convertNanoTimeToTimeMillis;
 import static com.alibaba.dcm.internal.TimeUtil.getNanoTimeAfterMs;
 
@@ -32,8 +32,6 @@
  * @author Jerry Lee (oldratlee at gmail dot com)
  * @since 1.6.0
  */
-@ParametersAreNonnullByDefault
-@ReturnValuesAreNonnullByDefault
 @ApiStatus.Internal
 @SuppressWarnings("JavadocReference")
 public final class InetAddressCacheUtilForNew {

library/src/main/java/com/alibaba/dcm/internal/InetAddressCacheUtilForOld.java

@@ -2,11 +2,9 @@
 
 import com.alibaba.dcm.DnsCache;
 import com.alibaba.dcm.DnsCacheEntry;
-import edu.umd.cs.findbugs.annotations.ReturnValuesAreNonnullByDefault;
 import org.jetbrains.annotations.ApiStatus;
 
 import javax.annotation.Nullable;
-import javax.annotation.ParametersAreNonnullByDefault;
 import javax.annotation.concurrent.GuardedBy;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
@@ -18,7 +16,9 @@
 import java.util.List;
 import java.util.Map;
 
-import static com.alibaba.dcm.internal.InetAddressCacheUtilCommons.*;
+import static com.alibaba.dcm.internal.InetAddressCacheUtilCommons.NEVER_EXPIRATION;
+import static com.alibaba.dcm.internal.InetAddressCacheUtilCommons.getIpFromInetAddress;
+import static com.alibaba.dcm.internal.InetAddressCacheUtilCommons.toInetAddressArray;
 
 /**
  * Util class to manipulate dns cache for old {@code JDK 8-}.
@@ -38,8 +38,6 @@
  * @see InetAddress#cacheInitIfNeeded()
  * @see InetAddress#cacheAddresses(String, InetAddress[], boolean)
  */
-@ParametersAreNonnullByDefault
-@ReturnValuesAreNonnullByDefault
 @ApiStatus.Internal
 @SuppressWarnings("JavadocReference")
 public final class InetAddressCacheUtilForOld {

library/src/main/java/com/alibaba/dcm/package-info.java

@@ -4,4 +4,13 @@
  * @author Jerry Lee (oldratlee at gmail dot com)
  * @see com.alibaba.dcm.DnsCacheManipulator
  */
+@DefaultAnnotation(NonNull.class)
+@ParametersAreNonnullByDefault
+@ReturnValuesAreNonnullByDefault
 package com.alibaba.dcm;
+
+import edu.umd.cs.findbugs.annotations.DefaultAnnotation;
+import edu.umd.cs.findbugs.annotations.NonNull;
+import edu.umd.cs.findbugs.annotations.ReturnValuesAreNonnullByDefault;
+
+import javax.annotation.ParametersAreNonnullByDefault;