Add superclasses for gson-jackson migration

Added common classes needed by other gson-jackson code.
Modified some logic to make it more maintainable or perform better.
Updated comments and spacing.
Fix another comment.
Moved gson classes from utils to a separate gson project.
Added GsonXxx annotations to mirror jackson annotations.
Removed unneeded dependencies from gson pom.
Removed old GsonMessage class from policy-endpoints.
Removed trailing spaces.
Updated licenses.
Removed more trailing spaces.
Removed unneeded checkstyle suppression file from utils.

Change-Id: I1a285500faeb0a0b6a1467d09b92ecd3cded713e
Issue-ID: POLICY-1428
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 0 insertions, 104 deletions

diff --git a/utils/src/main/java/org/onap/policy/common/utils/gson/JacksonExclusionStrategy.java b/utils/src/main/java/org/onap/policy/common/utils/gson/JacksonExclusionStrategy.java
deleted file mode 100644
index 96213a65..00000000
--- a/utils/src/main/java/org/onap/policy/common/utils/gson/JacksonExclusionStrategy.java
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * ============LICENSE_START=======================================================
- * ONAP
- * ================================================================================
- * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
- * ================================================================================
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- * ============LICENSE_END=========================================================
- */
-
-package org.onap.policy.common.utils.gson;
-
-import com.google.gson.ExclusionStrategy;
-import com.google.gson.FieldAttributes;
-import com.google.gson.JsonElement;
-import java.lang.reflect.GenericArrayType;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-
-/**
- * Excludes all fields from serialization/deserialization, if the class is managed.
- */
-public class JacksonExclusionStrategy implements ExclusionStrategy {
-
-    /**
-     * Classes that are explicitly not managed by the GSON jackson adapters.
-     */
-    // @formatter:off
-    private static final Set<Class<?>> unmanaged = new HashSet<>(Arrays.asList(
-                    boolean.class,
-                    byte.class,
-                    short.class,
-                    int.class,
-                    long.class,
-                    float.class,
-                    double.class,
-                    char.class,
-                    Boolean.class,
-                    Byte.class,
-                    Short.class,
-                    Integer.class,
-                    Long.class,
-                    Float.class,
-                    Double.class,
-                    Character.class,
-                    String.class));
-    // @formatter:on
-
-    /**
-     * Classes whose subclasses are explicitly not managed by the GSON jackson adapters.
-     */
-    // @formatter:off
-    private static final Set<Class<?>> unmanagedSuper = new HashSet<>(Arrays.asList(
-                    GenericArrayType.class,
-                    Map.class,
-                    Collection.class,
-                    JsonElement.class));
-    // @formatter:on
-
-    @Override
-    public boolean shouldSkipField(FieldAttributes attrs) {
-        return isManaged(attrs.getDeclaringClass());
-    }
-
-    @Override
-    public boolean shouldSkipClass(Class<?> clazz) {
-        return false;
-    }
-
-    /**
-     * Determines if a class is managed by this adapter, which typically means that it is
-     * <i>not</i> a generic class such as {@link JsonElement} or some type of collection.
-     *
-     * @param clazz the class to be examined
-     * @return {@code true} if the class is managed by this adapter, {@code false}
-     *         otherwise
-     */
-    public static boolean isManaged(Class<?> clazz) {
-        if (clazz.isArray() || clazz.isEnum() || clazz.isPrimitive() || unmanaged.contains(clazz)) {
-            return false;
-        }
-
-        for (Class<?> sup : unmanagedSuper) {
-            if (sup.isAssignableFrom(clazz)) {
-                return false;
-            }
-        }
-
-        return true;
-    }
-}