Add mappings to/from intermediate objects for NoSQL support

This is a draft solution for supporting NoSQL databases. It uses intermediary objects (currently called "Resources", but open to better names) to simplify a transformation to/from JSON. The intermediary objects support full serialization to JSON with the use of the `OAuth2AuthorizationServerJackson2Module`. Supports the following:

* Handles iterating/mapping supported token types, removing the need for applications to do this
* Converts enumerated types to/from strings with support for "custom" types
* Converts authorities to/from strings
* Supports custom settings values

Issue spring-projectsgh-558

Author: Steve Riesenberg

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/OAuth2AuthorizationConsentResource.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2022 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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.
+ */
+package org.springframework.security.oauth2.server.authorization;
+
+import java.util.Set;
+
+/**
+ * Resource containing the data of an {@link OAuth2AuthorizationConsent} object.
+ *
+ * @author Steve Riesenberg
+ * @since 0.2.2
+ */
+public class OAuth2AuthorizationConsentResource {
+	private String registeredClientId;
+	private String principalName;
+	private Set<String> authorities;
+
+	public String getRegisteredClientId() {
+		return registeredClientId;
+	}
+
+	public void setRegisteredClientId(String registeredClientId) {
+		this.registeredClientId = registeredClientId;
+	}
+
+	public String getPrincipalName() {
+		return principalName;
+	}
+
+	public void setPrincipalName(String principalName) {
+		this.principalName = principalName;
+	}
+
+	public Set<String> getAuthorities() {
+		return authorities;
+	}
+
+	public void setAuthorities(Set<String> authorities) {
+		this.authorities = authorities;
+	}
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/OAuth2AuthorizationResource.java

@@ -0,0 +1,140 @@
+/*
+ * Copyright 2022 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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.
+ */
+package org.springframework.security.oauth2.server.authorization;
+
+import java.time.Instant;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Resource containing the data of an {@link OAuth2Authorization} object.
+ *
+ * @author Steve Riesenberg
+ * @since 0.2.2
+ */
+public class OAuth2AuthorizationResource {
+	private String id;
+	private String registeredClientId;
+	private String principalName;
+	private String authorizationGrantType;
+	private String state;
+	private Set<String> scopes;
+	private Map<String, Object> attributes;
+	private Map<String, OAuth2TokenResource> tokens;
+
+	public String getId() {
+		return id;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public String getRegisteredClientId() {
+		return registeredClientId;
+	}
+
+	public void setRegisteredClientId(String registeredClientId) {
+		this.registeredClientId = registeredClientId;
+	}
+
+	public String getPrincipalName() {
+		return principalName;
+	}
+
+	public void setPrincipalName(String principalName) {
+		this.principalName = principalName;
+	}
+
+	public String getAuthorizationGrantType() {
+		return authorizationGrantType;
+	}
+
+	public void setAuthorizationGrantType(String authorizationGrantType) {
+		this.authorizationGrantType = authorizationGrantType;
+	}
+
+	public String getState() {
+		return state;
+	}
+
+	public void setState(String state) {
+		this.state = state;
+	}
+
+	public Set<String> getScopes() {
+		return scopes;
+	}
+
+	public void setScopes(Set<String> scopes) {
+		this.scopes = scopes;
+	}
+
+	public Map<String, Object> getAttributes() {
+		return attributes;
+	}
+
+	public void setAttributes(Map<String, Object> attributes) {
+		this.attributes = attributes;
+	}
+
+	public Map<String, OAuth2TokenResource> getTokens() {
+		return tokens;
+	}
+
+	public void setTokens(Map<String, OAuth2TokenResource> tokens) {
+		this.tokens = tokens;
+	}
+
+	public static class OAuth2TokenResource {
+		private String tokenValue;
+		private Instant issuedAt;
+		private Instant expiresAt;
+		private Map<String, Object> metadata;
+
+		public String getTokenValue() {
+			return tokenValue;
+		}
+
+		public void setTokenValue(String tokenValue) {
+			this.tokenValue = tokenValue;
+		}
+
+		public Instant getIssuedAt() {
+			return issuedAt;
+		}
+
+		public void setIssuedAt(Instant issuedAt) {
+			this.issuedAt = issuedAt;
+		}
+
+		public Instant getExpiresAt() {
+			return expiresAt;
+		}
+
+		public void setExpiresAt(Instant expiresAt) {
+			this.expiresAt = expiresAt;
+		}
+
+		public Map<String, Object> getMetadata() {
+			return metadata;
+		}
+
+		public void setMetadata(Map<String, Object> metadata) {
+			this.metadata = metadata;
+		}
+	}
+}