Add AuthorizationExchange

Fixes gh-4660

oauth2/oauth2-core/src/main/java/org/springframework/security/oauth2/core/endpoint/AuthorizationExchange.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2002-2017 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
+ *
+ *      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.
+ */
+package org.springframework.security.oauth2.core.endpoint;
+
+import org.springframework.util.Assert;
+
+/**
+ * An &quot;<i>exchange</i>&quot; of an <i>OAuth 2.0 Authorization Request and Response</i>
+ * for the authorization code grant type.
+ *
+ * @author Joe Grandja
+ * @since 5.0
+ * @see AuthorizationRequest
+ * @see AuthorizationResponse
+ */
+public final class AuthorizationExchange {
+	private final AuthorizationRequest authorizationRequest;
+	private final AuthorizationResponse authorizationResponse;
+
+	public AuthorizationExchange(AuthorizationRequest authorizationRequest,
+									AuthorizationResponse authorizationResponse) {
+		Assert.notNull(authorizationRequest, "authorizationRequest cannot be null");
+		Assert.notNull(authorizationResponse, "authorizationResponse cannot be null");
+		this.authorizationRequest = authorizationRequest;
+		this.authorizationResponse = authorizationResponse;
+	}
+
+	public AuthorizationRequest getAuthorizationRequest() {
+		return this.authorizationRequest;
+	}
+
+	public AuthorizationResponse getAuthorizationResponse() {
+		return this.authorizationResponse;
+	}
+}