feat: initialize xap sdk module (#127)

PR: #127

Author: OmarAlJarrah

xap-sdk/src/main/kotlin/com/expediagroup/sdk/xap/client/AsyncXapClient.kt

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2025 Expedia, Inc.
+ *
+ * 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 com.expediagroup.sdk.xap.client
+
+import com.expediagroup.sdk.rest.AsyncRestClient
+import com.expediagroup.sdk.rest.AsyncRestExecutor
+import com.expediagroup.sdk.rest.model.Response
+import com.expediagroup.sdk.rest.trait.operation.JacksonModelOperationResponseBodyTrait
+import com.expediagroup.sdk.rest.trait.operation.OperationNoResponseBodyTrait
+import com.expediagroup.sdk.xap.configuration.AsyncClientBuilder
+import com.expediagroup.sdk.xap.configuration.AsyncXapClientConfiguration
+import com.expediagroup.sdk.xap.configuration.Constant.ENDPOINT
+import com.expediagroup.sdk.xap.configuration.OBJECT_MAPPER
+import com.expediagroup.sdk.xap.core.AsyncRequestExecutor
+import java.util.concurrent.CompletableFuture
+
+/**
+ * Asynchronous client for XAP API.
+ *
+ * @property restExecutor The executor for handling REST operations.
+ */
+class AsyncXapClient private constructor(
+    config: AsyncXapClientConfiguration,
+) : AsyncRestClient() {
+    override val restExecutor: AsyncRestExecutor =
+        AsyncRestExecutor(
+            mapper = OBJECT_MAPPER,
+            serverUrl = ENDPOINT,
+            requestExecutor = AsyncRequestExecutor(configuration = config),
+        )
+
+    /**
+     * Executes an operation that does not expect a response body.
+     *
+     * @param operation The operation to execute.
+     * @return A CompletableFuture containing the response.
+     */
+    fun execute(operation: OperationNoResponseBodyTrait): CompletableFuture<Response<Nothing?>> = restExecutor.execute(operation)
+
+    /**
+     * Executes an operation that expects a response body.
+     *
+     * @param T The type of the response body.
+     * @param operation The operation to execute.
+     * @return A CompletableFuture containing the response.
+     */
+    fun <T : Any> execute(operation: JacksonModelOperationResponseBodyTrait<T>): CompletableFuture<Response<T>> = restExecutor.execute(operation)
+
+    companion object {
+        /**
+         * Builder for creating an instance of [AsyncXapClient].
+         */
+        class Builder : AsyncClientBuilder<AsyncXapClient>() {
+            override fun build(): AsyncXapClient = AsyncXapClient(buildConfig())
+        }
+
+        /**
+         * Creates a new builder for [AsyncXapClient].
+         *
+         * @return A new [Builder] instance.
+         */
+        @JvmStatic
+        fun builder() = Builder()
+    }
+}