Utilize i.n.u.internal.ObjectUtil to assert Preconditions (codec-http) (#11170) (#11187)

Motivation:

NullChecks resulting in a NullPointerException or IllegalArgumentException, numeric ranges (>0, >=0) checks, not empty strings/arrays checks must never be anonymous but with the parameter or variable name which is checked. They must be specific and should not be done with an "OR-Logic" (if a == null || b == null) throw new NullPointerEx.

Modifications:

* import static relevant checks
* Replace manual checks with ObjectUtil methods

Result:

All checks needed are done with ObjectUtil, some exception texts are improved.

Fixes #11170

codec-http/src/main/java/io/netty/handler/codec/http/HttpMethod.java

@@ -19,6 +19,7 @@ import io.netty.util.AsciiString;
 
 import static io.netty.util.internal.MathUtil.findNextPositivePowerOfTwo;
 import static io.netty.util.internal.ObjectUtil.checkNotNull;
+import static io.netty.util.internal.ObjectUtil.checkNonEmptyAfterTrim;
 
 /**
  * The request method of HTTP or its derived protocols, such as
@@ -120,10 +121,7 @@ public class HttpMethod implements Comparable<HttpMethod> {
      * <a href="https://en.wikipedia.org/wiki/Internet_Content_Adaptation_Protocol">ICAP</a>
      */
     public HttpMethod(String name) {
-        name = checkNotNull(name, "name").trim();
-        if (name.isEmpty()) {
-            throw new IllegalArgumentException("empty name");
-        }
+        name = checkNonEmptyAfterTrim(name, "name");
 
         for (int i = 0; i < name.length(); i ++) {
             char c = name.charAt(i);

codec-http/src/main/java/io/netty/handler/codec/http/HttpUtil.java

@@ -32,6 +32,7 @@ import io.netty.util.internal.ObjectUtil;
 import io.netty.util.internal.UnstableApi;
 
 import static io.netty.util.internal.StringUtil.COMMA;
+import static io.netty.util.internal.ObjectUtil.checkPositiveOrZero;
 
 /**
  * Utility methods useful in the HTTP context.
@@ -604,12 +605,7 @@ public final class HttpUtil {
         }
         try {
             final long value = Long.parseLong(firstField);
-            if (value < 0) {
-                // Reject the message as invalid
-                throw new IllegalArgumentException(
-                        "Content-Length value must be >=0: " + value);
-            }
-            return value;
+            return checkPositiveOrZero(value, "Content-Length value");
         } catch (NumberFormatException e) {
             // Reject the message as invalid
             throw new IllegalArgumentException(

codec-http/src/main/java/io/netty/handler/codec/http/HttpVersion.java

@@ -16,6 +16,7 @@
 package io.netty.handler.codec.http;
 
 import static io.netty.util.internal.ObjectUtil.checkPositiveOrZero;
+import static io.netty.util.internal.ObjectUtil.checkNonEmptyAfterTrim;
 
 import io.netty.buffer.ByteBuf;
 import io.netty.util.CharsetUtil;
@@ -108,12 +109,7 @@ public class HttpVersion implements Comparable<HttpVersion> {
      *        the {@code "Connection"} header is set to {@code "close"} explicitly.
      */
     public HttpVersion(String text, boolean keepAliveDefault) {
-        ObjectUtil.checkNotNull(text, "text");
-
-        text = text.trim().toUpperCase();
-        if (text.isEmpty()) {
-            throw new IllegalArgumentException("empty text");
-        }
+        text = checkNonEmptyAfterTrim(text, "text").toUpperCase();
 
         Matcher m = VERSION_PATTERN.matcher(text);
         if (!m.matches()) {
@@ -148,12 +144,7 @@ public class HttpVersion implements Comparable<HttpVersion> {
     private HttpVersion(
             String protocolName, int majorVersion, int minorVersion,
             boolean keepAliveDefault, boolean bytes) {
-        ObjectUtil.checkNotNull(protocolName, "protocolName");
-
-        protocolName = protocolName.trim().toUpperCase();
-        if (protocolName.isEmpty()) {
-            throw new IllegalArgumentException("empty protocolName");
-        }
+        protocolName = checkNonEmptyAfterTrim(protocolName, "protocolName").toUpperCase();
 
         for (int i = 0; i < protocolName.length(); i ++) {
             if (Character.isISOControl(protocolName.charAt(i)) ||

codec-http/src/main/java/io/netty/handler/codec/http/cookie/DefaultCookie.java

@@ -20,6 +20,7 @@ import io.netty.handler.codec.http.cookie.CookieHeaderNames.SameSite;
 import static io.netty.handler.codec.http.cookie.CookieUtil.stringBuilder;
 import static io.netty.handler.codec.http.cookie.CookieUtil.validateAttributeValue;
 import static io.netty.util.internal.ObjectUtil.checkNotNull;
+import static io.netty.util.internal.ObjectUtil.checkNonEmptyAfterTrim;
 
 /**
  * The default {@link Cookie} implementation.
@@ -40,11 +41,7 @@ public class DefaultCookie implements Cookie {
      * Creates a new cookie with the specified name and value.
      */
     public DefaultCookie(String name, String value) {
-        name = checkNotNull(name, "name").trim();
-        if (name.isEmpty()) {
-            throw new IllegalArgumentException("empty name");
-        }
-        this.name = name;
+        this.name = checkNonEmptyAfterTrim(name, "name");
         setValue(value);
     }
 

codec-http/src/main/java/io/netty/handler/codec/http/cors/CorsConfigBuilder.java

@@ -15,6 +15,8 @@
  */
 package io.netty.handler.codec.http.cors;
 
+import static io.netty.util.internal.ObjectUtil.checkNotNullWithIAE;
+
 import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpMethod;
 
@@ -378,10 +380,7 @@ public final class CorsConfigBuilder {
          * @param value the value that will be returned when the call method is invoked.
          */
         private ConstantValueGenerator(final Object value) {
-            if (value == null) {
-                throw new IllegalArgumentException("value must not be null");
-            }
-            this.value = value;
+            this.value = checkNotNullWithIAE(value, "value");
         }
 
         @Override

codec-http/src/main/java/io/netty/handler/codec/http/multipart/AbstractHttpData.java

@@ -15,6 +15,8 @@
  */
 package io.netty.handler.codec.http.multipart;
 
+import static io.netty.util.internal.ObjectUtil.checkNonEmpty;
+
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelException;
 import io.netty.handler.codec.http.HttpConstants;
@@ -46,11 +48,7 @@ public abstract class AbstractHttpData extends AbstractReferenceCounted implemen
         name = REPLACE_PATTERN.matcher(name).replaceAll(" ");
         name = STRIP_PATTERN.matcher(name).replaceAll("");
 
-        if (name.isEmpty()) {
-            throw new IllegalArgumentException("empty name");
-        }
-
-        this.name = name;
+        this.name = checkNonEmpty(name, "name");
         if (charset != null) {
             setCharset(charset);
         }

codec-http/src/main/java/io/netty/handler/codec/http/websocketx/extensions/WebSocketClientExtensionHandler.java

@@ -15,6 +15,8 @@
  */
 package io.netty.handler.codec.http.websocketx.extensions;
 
+import static io.netty.util.internal.ObjectUtil.checkNonEmpty;
+
 import io.netty.channel.ChannelDuplexHandler;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelPromise;
@@ -22,7 +24,6 @@ import io.netty.handler.codec.CodecException;
 import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpRequest;
 import io.netty.handler.codec.http.HttpResponse;
-import io.netty.util.internal.ObjectUtil;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -51,11 +52,7 @@ public class WebSocketClientExtensionHandler extends ChannelDuplexHandler {
      *      with fallback configuration.
      */
     public WebSocketClientExtensionHandler(WebSocketClientExtensionHandshaker... extensionHandshakers) {
-        ObjectUtil.checkNotNull(extensionHandshakers, "extensionHandshakers");
-        if (extensionHandshakers.length == 0) {
-            throw new IllegalArgumentException("extensionHandshakers must contains at least one handshaker");
-        }
-        this.extensionHandshakers = Arrays.asList(extensionHandshakers);
+        this.extensionHandshakers = Arrays.asList(checkNonEmpty(extensionHandshakers, "extensionHandshakers"));
     }
 
     @Override

codec-http/src/main/java/io/netty/handler/codec/http/websocketx/extensions/WebSocketServerExtensionHandler.java

@@ -15,6 +15,8 @@
  */
 package io.netty.handler.codec.http.websocketx.extensions;
 
+import static io.netty.util.internal.ObjectUtil.checkNonEmpty;
+
 import io.netty.channel.ChannelDuplexHandler;
 import io.netty.channel.ChannelFuture;
 import io.netty.channel.ChannelFutureListener;
@@ -25,7 +27,6 @@ import io.netty.handler.codec.http.HttpHeaders;
 import io.netty.handler.codec.http.HttpRequest;
 import io.netty.handler.codec.http.HttpResponse;
 import io.netty.handler.codec.http.HttpResponseStatus;
-import io.netty.util.internal.ObjectUtil;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -56,11 +57,7 @@ public class WebSocketServerExtensionHandler extends ChannelDuplexHandler {
      *      with fallback configuration.
      */
     public WebSocketServerExtensionHandler(WebSocketServerExtensionHandshaker... extensionHandshakers) {
-        ObjectUtil.checkNotNull(extensionHandshakers, "extensionHandshakers");
-        if (extensionHandshakers.length == 0) {
-            throw new IllegalArgumentException("extensionHandshakers must contains at least one handshaker");
-        }
-        this.extensionHandshakers = Arrays.asList(extensionHandshakers);
+        this.extensionHandshakers = Arrays.asList(checkNonEmpty(extensionHandshakers, "extensionHandshakers"));
     }
 
     @Override

codec-http/src/main/java/io/netty/handler/codec/rtsp/RtspMethods.java

@@ -15,8 +15,9 @@
  */
 package io.netty.handler.codec.rtsp;
 
+import static io.netty.util.internal.ObjectUtil.checkNonEmptyAfterTrim;
+
 import io.netty.handler.codec.http.HttpMethod;
-import io.netty.util.internal.ObjectUtil;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -118,13 +119,7 @@ public final class RtspMethods {
      * will be returned.  Otherwise, a new instance will be returned.
      */
     public static HttpMethod valueOf(String name) {
-        ObjectUtil.checkNotNull(name, "name");
-
-        name = name.trim().toUpperCase();
-        if (name.isEmpty()) {
-            throw new IllegalArgumentException("empty name");
-        }
-
+        name = checkNonEmptyAfterTrim(name, "name").toUpperCase();
         HttpMethod result = methodMap.get(name);
         if (result != null) {
             return result;

codec-http/src/main/java/io/netty/handler/codec/spdy/SpdyCodecUtil.java

@@ -15,8 +15,10 @@
  */
 package io.netty.handler.codec.spdy;
 
+import static io.netty.util.internal.ObjectUtil.checkNonEmpty;
+import static io.netty.util.internal.ObjectUtil.checkNotNull;
+
 import io.netty.buffer.ByteBuf;
-import io.netty.util.internal.ObjectUtil;
 
 final class SpdyCodecUtil {
 
@@ -287,11 +289,7 @@ final class SpdyCodecUtil {
      * Validate a SPDY header name.
      */
     static void validateHeaderName(CharSequence name) {
-        ObjectUtil.checkNotNull(name, "name");
-        if (name.length() == 0) {
-            throw new IllegalArgumentException(
-                    "name cannot be length zero");
-        }
+        checkNonEmpty(name, "name");
         // Since name may only contain ascii characters, for valid names
         // name.length() returns the number of bytes when UTF-8 encoded.
         if (name.length() > SPDY_MAX_NV_LENGTH) {
@@ -318,7 +316,7 @@ final class SpdyCodecUtil {
      * Validate a SPDY header value. Does not validate max length.
      */
     static void validateHeaderValue(CharSequence value) {
-        ObjectUtil.checkNotNull(value, "value");
+        checkNotNull(value, "value");
         for (int i = 0; i < value.length(); i ++) {
             char c = value.charAt(i);
             if (c == 0) {

codec-http/src/main/java/io/netty/handler/codec/spdy/SpdyHeaderBlockJZlibEncoder.java

@@ -23,6 +23,7 @@ import io.netty.buffer.Unpooled;
 import io.netty.handler.codec.compression.CompressionException;
 
 import static io.netty.handler.codec.spdy.SpdyCodecUtil.*;
+import static io.netty.util.internal.ObjectUtil.checkNotNullWithIAE;
 
 class SpdyHeaderBlockJZlibEncoder extends SpdyHeaderBlockRawEncoder {
 
@@ -122,9 +123,8 @@ class SpdyHeaderBlockJZlibEncoder extends SpdyHeaderBlockRawEncoder {
 
     @Override
     public ByteBuf encode(ByteBufAllocator alloc, SpdyHeadersFrame frame) throws Exception {
-        if (frame == null) {
-            throw new IllegalArgumentException("frame");
-        }
+        checkNotNullWithIAE(alloc, "alloc");
+        checkNotNullWithIAE(frame, "frame");
 
         if (finished) {
             return Unpooled.EMPTY_BUFFER;

codec-http/src/main/java/io/netty/handler/codec/spdy/SpdyHeaderBlockZlibEncoder.java

@@ -24,6 +24,7 @@ import io.netty.util.internal.SuppressJava6Requirement;
 import java.util.zip.Deflater;
 
 import static io.netty.handler.codec.spdy.SpdyCodecUtil.*;
+import static io.netty.util.internal.ObjectUtil.checkNotNullWithIAE;
 
 class SpdyHeaderBlockZlibEncoder extends SpdyHeaderBlockRawEncoder {
 
@@ -89,9 +90,8 @@ class SpdyHeaderBlockZlibEncoder extends SpdyHeaderBlockRawEncoder {
 
     @Override
     public ByteBuf encode(ByteBufAllocator alloc, SpdyHeadersFrame frame) throws Exception {
-        if (frame == null) {
-            throw new IllegalArgumentException("frame");
-        }
+        checkNotNullWithIAE(alloc, "alloc");
+        checkNotNullWithIAE(frame, "frame");
 
         if (finished) {
             return Unpooled.EMPTY_BUFFER;