shaded classes from Guava to keep the API stable

Author: soberich

build.gradle

@@ -77,7 +77,7 @@ artifacts {
 
 wrapper {
     gradleVersion = "5.0";
-    distributionUrl = "http://services.gradle.org/distributions/gradle-${gradleVersion}-all.zip";
+    distributionUrl = "https://services.gradle.org/distributions/gradle-${gradleVersion}-all.zip";
 }
 
 task pom {

pom.xml

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>java-json-tools</groupId>
+  <artifactId>jackson-coreutils</artifactId>
+  <version>1.10-SNAPSHOT</version>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.8.0</version>
+        <configuration>
+          <source>1.6</source>
+          <target>1.6</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-databind</artifactId>
+      <version>2.9.7</version>
+    </dependency>
+    <dependency>
+      <groupId>com.github.fge</groupId>
+      <artifactId>msg-simple</artifactId>
+      <version>1.1</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.code.findbugs</groupId>
+      <artifactId>jsr305</artifactId>
+      <version>3.0.2</version>
+    </dependency>
+    <dependency>
+      <groupId>org.testng</groupId>
+      <artifactId>testng</artifactId>
+      <version>7.0.0-beta1</version>
+      <scope>test</scope>
+      <exclusions>
+        <exclusion>
+          <artifactId>junit</artifactId>
+          <groupId>junit</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>snakeyaml</artifactId>
+          <groupId>org.yaml</groupId>
+        </exclusion>
+        <exclusion>
+          <artifactId>bsh</artifactId>
+          <groupId>org.beanshell</groupId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <version>2.23.4</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>

project.gradle

@@ -31,6 +31,7 @@ targetCompatibility = JavaVersion.VERSION_1_6; // defaults to sourceCompatibilit
 dependencies {
     implementation(group: "com.fasterxml.jackson.core", name: "jackson-databind", version: "2.9.7");
     implementation(group: "com.github.fge", name: "msg-simple", version: "1.1");
+//    compile(group: "com.google.guava", name: "guava", version: "16.0.1");
     implementation(group: "com.google.code.findbugs", name: "jsr305", version: "3.0.2");
     testImplementation(group: "org.testng", name: "testng", version: "7.0.0-beta1") {
         exclude(group: "junit", module: "junit");

src/main/java/com/github/fge/jackson/JsonNumEquals.java

@@ -20,8 +20,8 @@
 package com.github.fge.jackson;
 
 import com.fasterxml.jackson.databind.JsonNode;
+import com.google.common.base.Equivalence;
 
-import javax.annotation.Nullable;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Map;
@@ -41,50 +41,21 @@
  * kind of equality.</p>
  */
 public final class JsonNumEquals
+    extends Equivalence<JsonNode>
 {
-    private static final JsonNumEquals INSTANCE
+    private static final Equivalence<JsonNode> INSTANCE
         = new JsonNumEquals();
 
     private JsonNumEquals()
     {
     }
 
-    public static JsonNumEquals getInstance()
+    public static Equivalence<JsonNode> getInstance()
     {
         return INSTANCE;
     }
 
-    /**
-     * Returns {@code true} if the given objects are considered equivalent.
-     *
-     * <p>The {@code equivalent} method implements an equivalence relation on object references:
-     *
-     * <ul>
-     * <li>It is <i>reflexive</i>: for any reference {@code x}, including null, {@code
-     *     equivalent(x, x)} returns {@code true}.
-     * <li>It is <i>symmetric</i>: for any references {@code x} and {@code y}, {@code
-     *     equivalent(x, y) == equivalent(y, x)}.
-     * <li>It is <i>transitive</i>: for any references {@code x}, {@code y}, and {@code z}, if
-     *     {@code equivalent(x, y)} returns {@code true} and {@code equivalent(y, z)} returns {@code
-     *     true}, then {@code equivalent(x, z)} returns {@code true}.
-     * <li>It is <i>consistent</i>: for any references {@code x} and {@code y}, multiple invocations
-     *     of {@code equivalent(x, y)} consistently return {@code true} or consistently return {@code
-     *     false} (provided that neither {@code x} nor {@code y} is modified).
-     * </ul>
-     * @param a x
-     * @param b y
-     * @return whether nodes are equal according to IETF RFCs
-     */
-    public final boolean equivalent(@Nullable JsonNode a, @Nullable JsonNode b) {
-        if (a == b) {
-            return true;
-        }
-        if (a == null || b == null) {
-            return false;
-        }
-        return doEquivalent(a, b);
-    }
-
+    @Override
     protected boolean doEquivalent(final JsonNode a, final JsonNode b)
     {
         /*
@@ -122,31 +93,7 @@ protected boolean doEquivalent(final JsonNode a, final JsonNode b)
         return typeA == NodeType.ARRAY ? arrayEquals(a, b) : objectEquals(a, b);
     }
 
-    /**
-     * Returns a hash code for {@code t}.
-     *
-     * <p>The {@code hash} has the following properties:
-     * <ul>
-     * <li>It is <i>consistent</i>: for any reference {@code x}, multiple invocations of
-     *     {@code hash(x}} consistently return the same value provided {@code x} remains unchanged
-     *     according to the definition of the equivalence. The hash need not remain consistent from
-     *     one execution of an application to another execution of the same application.
-     * <li>It is <i>distributable across equivalence</i>: for any references {@code x} and {@code y},
-     *     if {@code equivalent(x, y)}, then {@code hash(x) == hash(y)}. It is <i>not</i> necessary
-     *     that the hash be distributable across <i>inequivalence</i>. If {@code equivalence(x, y)}
-     *     is false, {@code hash(x) == hash(y)} may still be true.
-     * <li>{@code hash(null)} is {@code 0}.
-     * </ul>
-     * @param t node to hash
-     * @return hash
-     */
-    public final int hash(@Nullable JsonNode t) {
-        if (t == null) {
-            return 0;
-        }
-        return doHash(t);
-    }
-
+    @Override
     protected int doHash(final JsonNode t)
     {
         /*