Implemented Grounding with Google Search feature.

common/src/main/kotlin/com/google/ai/client/generativeai/common/client/Types.kt

@@ -39,6 +39,7 @@ data class Tool(
   val functionDeclarations: List<FunctionDeclaration>? = null,
   // This is a json object because it is not possible to make a data class with no parameters.
   val codeExecution: JsonObject? = null,
+  val googleSearchRetrieval: GoogleSearchRetrieval? = null
 )
 
 @Serializable
@@ -60,6 +61,23 @@ data class FunctionCallingConfig(val mode: Mode) {
 @Serializable
 data class FunctionDeclaration(val name: String, val description: String, val parameters: Schema)
 
+@Serializable
+data class GoogleSearchRetrieval(val dynamicRetrievalConfig: DynamicRetrievalConfig)
+
+@Serializable
+data class DynamicRetrievalConfig(
+  val mode: Mode,
+  val dynamicThreshold: Float?
+) {
+  @Serializable
+  enum class Mode {
+    @SerialName("MODE_DYNAMIC")
+    DYNAMIC,
+    @SerialName("MODE_UNSPECIFIED")
+    UNSPECIFIED
+  }
+}
+
 @Serializable
 data class Schema(
   val type: String,

generativeai/src/main/java/com/google/ai/client/generativeai/internal/util/conversions.kt

@@ -22,7 +22,9 @@ import android.util.Base64
 import com.google.ai.client.generativeai.common.CountTokensResponse
 import com.google.ai.client.generativeai.common.GenerateContentResponse
 import com.google.ai.client.generativeai.common.RequestOptions
+import com.google.ai.client.generativeai.common.client.DynamicRetrievalConfig
 import com.google.ai.client.generativeai.common.client.GenerationConfig
+import com.google.ai.client.generativeai.common.client.GoogleSearchRetrieval
 import com.google.ai.client.generativeai.common.client.Schema
 import com.google.ai.client.generativeai.common.server.BlockReason
 import com.google.ai.client.generativeai.common.server.Candidate
@@ -52,6 +54,7 @@ import com.google.ai.client.generativeai.common.shared.SafetySetting
 import com.google.ai.client.generativeai.common.shared.TextPart
 import com.google.ai.client.generativeai.type.BlockThreshold
 import com.google.ai.client.generativeai.type.CitationMetadata
+import com.google.ai.client.generativeai.type.DynamicRetrievalMode
 import com.google.ai.client.generativeai.type.ExecutionOutcome
 import com.google.ai.client.generativeai.type.FunctionCallingConfig
 import com.google.ai.client.generativeai.type.FunctionDeclaration
@@ -144,6 +147,7 @@ internal fun Tool.toInternal() =
   com.google.ai.client.generativeai.common.client.Tool(
     functionDeclarations?.map { it.toInternal() },
     codeExecution = codeExecution?.toInternal(),
+    googleSearchRetrieval = googleSearchRetrieval?.toInternal()
   )
 
 internal fun ToolConfig.toInternal() =
@@ -189,6 +193,20 @@ internal fun <T> com.google.ai.client.generativeai.type.Schema<T>.toInternal():
 
 internal fun JSONObject.toInternal() = Json.decodeFromString<JsonObject>(toString())
 
+internal fun com.google.ai.client.generativeai.type.GoogleSearchRetrieval.toInternal(): GoogleSearchRetrieval {
+  return GoogleSearchRetrieval(dynamicRetrievalConfig.toInternal())
+}
+
+internal fun com.google.ai.client.generativeai.type.DynamicRetrievalConfig.toInternal(): DynamicRetrievalConfig {
+  return DynamicRetrievalConfig(
+    when (mode) {
+      DynamicRetrievalMode.DYNAMIC -> com.google.ai.client.generativeai.common.client.DynamicRetrievalConfig.Mode.DYNAMIC
+      DynamicRetrievalMode.UNSPECIFIED -> com.google.ai.client.generativeai.common.client.DynamicRetrievalConfig.Mode.UNSPECIFIED
+    },
+    dynamicThreshold
+  )
+}
+
 internal fun Candidate.toPublic(): com.google.ai.client.generativeai.type.Candidate {
   val safetyRatings = safetyRatings?.map { it.toPublic() }.orEmpty()
   val citations = citationMetadata?.citationSources?.map { it.toPublic() }.orEmpty()

generativeai/src/main/java/com/google/ai/client/generativeai/type/DynamicRetrievalConfig.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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.google.ai.client.generativeai.type
+
+import androidx.annotation.FloatRange
+
+/*
+* Specifies the dynamic retrieval configuration for the given source.
+*/
+data class DynamicRetrievalConfig(
+    /*
+    * The mode of the predictor to be used in dynamic retrieval.
+     */
+    val mode: DynamicRetrievalMode,
+    /*
+    * (Optional) The threshold to be used in dynamic retrieval. If not set, a system default value is used.
+     */
+    @FloatRange(0.0, 1.0)
+    val dynamicThreshold: Float? = null
+)

generativeai/src/main/java/com/google/ai/client/generativeai/type/DynamicRetrievalMode.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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.google.ai.client.generativeai.type
+
+/*
+* The mode of the predictor to be used in [DynamicRetrievalConfig].
+*/
+enum class DynamicRetrievalMode {
+    DYNAMIC,
+    UNSPECIFIED
+}

generativeai/src/main/java/com/google/ai/client/generativeai/type/GoogleSearchRetrieval.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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.google.ai.client.generativeai.type
+
+/**
+ * Retrieval tool that is powered by Google search.
+ */
+data class GoogleSearchRetrieval(
+    val dynamicRetrievalConfig: DynamicRetrievalConfig
+)

generativeai/src/main/java/com/google/ai/client/generativeai/type/Tool.kt

@@ -24,12 +24,14 @@ import org.json.JSONObject
  *
  * @param functionDeclarations The set of functions that this tool allows the model access to
  * @param codeExecution This is a flag value to enable Code Execution. Use [CODE_EXECUTION].
+ * @param googleSearchRetrieval This is a Retrieval tool that is powered by Google search.
  */
 class Tool
 @JvmOverloads
 constructor(
   val functionDeclarations: List<FunctionDeclaration>? = null,
   val codeExecution: JSONObject? = null,
+  val googleSearchRetrieval: GoogleSearchRetrieval? = null
 ) {
   companion object {
     @JvmField val CODE_EXECUTION = Tool(codeExecution = JSONObject())