Fix missing import in allOf query parameters (#14408)

* add test for allOf in query parameter

* fix missing import in allof query parameter

* update samples

* update samples

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/QueryApi.java

@@ -17,6 +17,7 @@ import org.openapitools.client.ApiException;
 import org.openapitools.client.ApiResponse;
 import org.openapitools.client.Pair;
 
+import org.openapitools.client.model.BirdAndCategory;
 import org.openapitools.client.model.Pet;
 import org.openapitools.client.model.TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter;
 
@@ -265,6 +266,98 @@ public class QueryApi {
     }
     return localVarRequestBuilder;
   }
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param queryObject  (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleDeepObjectExplodeTrueObjectAllOf(BirdAndCategory queryObject) throws ApiException {
+    ApiResponse<String> localVarResponse = testQueryStyleDeepObjectExplodeTrueObjectAllOfWithHttpInfo(queryObject);
+    return localVarResponse.getData();
+  }
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param queryObject  (optional)
+   * @return ApiResponse&lt;String&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<String> testQueryStyleDeepObjectExplodeTrueObjectAllOfWithHttpInfo(BirdAndCategory queryObject) throws ApiException {
+    HttpRequest.Builder localVarRequestBuilder = testQueryStyleDeepObjectExplodeTrueObjectAllOfRequestBuilder(queryObject);
+    try {
+      HttpResponse<InputStream> localVarResponse = memberVarHttpClient.send(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofInputStream());
+      if (memberVarResponseInterceptor != null) {
+        memberVarResponseInterceptor.accept(localVarResponse);
+      }
+      try {
+        if (localVarResponse.statusCode()/ 100 != 2) {
+          throw getApiException("testQueryStyleDeepObjectExplodeTrueObjectAllOf", localVarResponse);
+        }
+        // for plain text response
+        if (localVarResponse.headers().map().containsKey("Content-Type") &&
+                "text/plain".equalsIgnoreCase(localVarResponse.headers().map().get("Content-Type").get(0))) {
+          java.util.Scanner s = new java.util.Scanner(localVarResponse.body()).useDelimiter("\\A");
+          String responseBodyText = s.hasNext() ? s.next() : "";
+          return new ApiResponse<String>(
+                  localVarResponse.statusCode(),
+                  localVarResponse.headers().map(),
+                  responseBodyText
+          );
+        } else {
+            throw new RuntimeException("Error! The response Content-Type is supposed to be `text/plain` but it's not: " + localVarResponse);
+        }
+      } finally {
+      }
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new ApiException(e);
+    }
+  }
+
+  private HttpRequest.Builder testQueryStyleDeepObjectExplodeTrueObjectAllOfRequestBuilder(BirdAndCategory queryObject) throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/query/style_deepObject/explode_true/object/allOf";
+
+    List<Pair> localVarQueryParams = new ArrayList<>();
+    StringJoiner localVarQueryDeepObjectStringJoiner = new StringJoiner("&");
+    String localVarQueryParameterBaseName;
+    localVarQueryParameterBaseName = "query_object";
+    if (queryObject != null) {
+      localVarQueryDeepObjectStringJoiner.add(queryObject.toUrlQueryString("query_object"));
+    }
+
+    if (!localVarQueryParams.isEmpty() || localVarQueryDeepObjectStringJoiner.length() != 0) {
+      StringJoiner queryJoiner = new StringJoiner("&");
+      localVarQueryParams.forEach(p -> queryJoiner.add(p.getName() + '=' + p.getValue()));
+      if (localVarQueryDeepObjectStringJoiner.length() != 0) {
+        queryJoiner.add(localVarQueryDeepObjectStringJoiner.toString());
+      }
+      localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath + '?' + queryJoiner.toString()));
+    } else {
+      localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+    }
+
+    localVarRequestBuilder.header("Accept", "text/plain");
+
+    localVarRequestBuilder.method("GET", HttpRequest.BodyPublishers.noBody());
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
   /**
    * Test query parameter(s)
    * Test query parameter(s)

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/model/Bird.java

@@ -0,0 +1,168 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.StringJoiner;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * Bird
+ */
+@JsonPropertyOrder({
+  Bird.JSON_PROPERTY_SIZE,
+  Bird.JSON_PROPERTY_COLOR
+})
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Bird {
+  public static final String JSON_PROPERTY_SIZE = "size";
+  private String size;
+
+  public static final String JSON_PROPERTY_COLOR = "color";
+  private String color;
+
+  public Bird() { 
+  }
+
+  public Bird size(String size) {
+    this.size = size;
+    return this;
+  }
+
+   /**
+   * Get size
+   * @return size
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_SIZE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getSize() {
+    return size;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_SIZE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setSize(String size) {
+    this.size = size;
+  }
+
+
+  public Bird color(String color) {
+    this.color = color;
+    return this;
+  }
+
+   /**
+   * Get color
+   * @return color
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_COLOR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getColor() {
+    return color;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_COLOR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setColor(String color) {
+    this.color = color;
+  }
+
+
+  /**
+   * Return true if this Bird object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Bird bird = (Bird) o;
+    return Objects.equals(this.size, bird.size) &&
+        Objects.equals(this.color, bird.color);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(size, color);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Bird {\n");
+    sb.append("    size: ").append(toIndentedString(size)).append("\n");
+    sb.append("    color: ").append(toIndentedString(color)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+
+  /**
+   * Convert the instance into URL query string.
+   *
+   * @param prefix prefix of the query string
+   * @return URL query string
+   */
+  public String toUrlQueryString(String prefix) {
+    if (prefix == null) {
+      prefix = "";
+    }
+
+    StringJoiner joiner = new StringJoiner("&");
+
+    // add `size` to the URL query string
+    if (getSize() != null) {
+      joiner.add(String.format("%s[size]=%s", prefix, URLEncoder.encode(String.valueOf(getSize()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    // add `color` to the URL query string
+    if (getColor() != null) {
+      joiner.add(String.format("%s[color]=%s", prefix, URLEncoder.encode(String.valueOf(getColor()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    return joiner.toString();
+  }
+}
+

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/model/BirdAndCategory.java

@@ -0,0 +1,240 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.StringJoiner;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * BirdAndCategory
+ */
+@JsonPropertyOrder({
+  BirdAndCategory.JSON_PROPERTY_SIZE,
+  BirdAndCategory.JSON_PROPERTY_COLOR,
+  BirdAndCategory.JSON_PROPERTY_ID,
+  BirdAndCategory.JSON_PROPERTY_NAME
+})
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class BirdAndCategory {
+  public static final String JSON_PROPERTY_SIZE = "size";
+  private String size;
+
+  public static final String JSON_PROPERTY_COLOR = "color";
+  private String color;
+
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+  public BirdAndCategory() { 
+  }
+
+  public BirdAndCategory size(String size) {
+    this.size = size;
+    return this;
+  }
+
+   /**
+   * Get size
+   * @return size
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_SIZE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getSize() {
+    return size;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_SIZE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setSize(String size) {
+    this.size = size;
+  }
+
+
+  public BirdAndCategory color(String color) {
+    this.color = color;
+    return this;
+  }
+
+   /**
+   * Get color
+   * @return color
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_COLOR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getColor() {
+    return color;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_COLOR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setColor(String color) {
+    this.color = color;
+  }
+
+
+  public BirdAndCategory id(Long id) {
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public BirdAndCategory name(String name) {
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  /**
+   * Return true if this BirdAndCategory object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    BirdAndCategory birdAndCategory = (BirdAndCategory) o;
+    return Objects.equals(this.size, birdAndCategory.size) &&
+        Objects.equals(this.color, birdAndCategory.color) &&
+        Objects.equals(this.id, birdAndCategory.id) &&
+        Objects.equals(this.name, birdAndCategory.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(size, color, id, name);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class BirdAndCategory {\n");
+    sb.append("    size: ").append(toIndentedString(size)).append("\n");
+    sb.append("    color: ").append(toIndentedString(color)).append("\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+
+  /**
+   * Convert the instance into URL query string.
+   *
+   * @param prefix prefix of the query string
+   * @return URL query string
+   */
+  public String toUrlQueryString(String prefix) {
+    if (prefix == null) {
+      prefix = "";
+    }
+
+    StringJoiner joiner = new StringJoiner("&");
+
+    // add `size` to the URL query string
+    if (getSize() != null) {
+      joiner.add(String.format("%s[size]=%s", prefix, URLEncoder.encode(String.valueOf(getSize()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    // add `color` to the URL query string
+    if (getColor() != null) {
+      joiner.add(String.format("%s[color]=%s", prefix, URLEncoder.encode(String.valueOf(getColor()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    // add `id` to the URL query string
+    if (getId() != null) {
+      joiner.add(String.format("%s[id]=%s", prefix, URLEncoder.encode(String.valueOf(getId()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    // add `name` to the URL query string
+    if (getName() != null) {
+      joiner.add(String.format("%s[name]=%s", prefix, URLEncoder.encode(String.valueOf(getName()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    return joiner.toString();
+  }
+}
+

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/model/TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.java

@@ -0,0 +1,240 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.StringJoiner;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter
+ */
+@JsonPropertyOrder({
+  TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.JSON_PROPERTY_ID,
+  TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.JSON_PROPERTY_NAME,
+  TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.JSON_PROPERTY_SIZE,
+  TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.JSON_PROPERTY_COLOR
+})
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+  public static final String JSON_PROPERTY_SIZE = "size";
+  private String size;
+
+  public static final String JSON_PROPERTY_COLOR = "color";
+  private String color;
+
+  public TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter() { 
+  }
+
+  public TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter id(Long id) {
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter name(String name) {
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  public TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter size(String size) {
+    this.size = size;
+    return this;
+  }
+
+   /**
+   * Get size
+   * @return size
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_SIZE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getSize() {
+    return size;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_SIZE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setSize(String size) {
+    this.size = size;
+  }
+
+
+  public TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter color(String color) {
+    this.color = color;
+    return this;
+  }
+
+   /**
+   * Get color
+   * @return color
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_COLOR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getColor() {
+    return color;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_COLOR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setColor(String color) {
+    this.color = color;
+  }
+
+
+  /**
+   * Return true if this test_query_style_deepObject_explode_true_object_allOf_query_object_parameter object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter testQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter = (TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter) o;
+    return Objects.equals(this.id, testQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.id) &&
+        Objects.equals(this.name, testQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.name) &&
+        Objects.equals(this.size, testQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.size) &&
+        Objects.equals(this.color, testQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.color);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name, size, color);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("    size: ").append(toIndentedString(size)).append("\n");
+    sb.append("    color: ").append(toIndentedString(color)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+
+  /**
+   * Convert the instance into URL query string.
+   *
+   * @param prefix prefix of the query string
+   * @return URL query string
+   */
+  public String toUrlQueryString(String prefix) {
+    if (prefix == null) {
+      prefix = "";
+    }
+
+    StringJoiner joiner = new StringJoiner("&");
+
+    // add `id` to the URL query string
+    if (getId() != null) {
+      joiner.add(String.format("%s[id]=%s", prefix, URLEncoder.encode(String.valueOf(getId()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    // add `name` to the URL query string
+    if (getName() != null) {
+      joiner.add(String.format("%s[name]=%s", prefix, URLEncoder.encode(String.valueOf(getName()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    // add `size` to the URL query string
+    if (getSize() != null) {
+      joiner.add(String.format("%s[size]=%s", prefix, URLEncoder.encode(String.valueOf(getSize()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    // add `color` to the URL query string
+    if (getColor() != null) {
+      joiner.add(String.format("%s[color]=%s", prefix, URLEncoder.encode(String.valueOf(getColor()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    return joiner.toString();
+  }
+}
+

samples/client/echo_api/java/native/src/test/java/org/openapitools/client/CustomTest.java

@@ -90,6 +90,25 @@ public class CustomTest {
         Assert.assertEquals("/query/style_deepObject/explode_true/object?query_object[id]=12345&query_object[name]=Hello%20World&query_object[category][id]=987&query_object[category][name]=new%20category&query_object[photoUrls][0]=http%3A%2F%2Fa.com&query_object[photoUrls][1]=http%3A%2F%2Fb.com", p.path);
     }
 
+    /**
+     * Test query parameter(s)
+     * <p>
+     * Test query parameter(s)
+     *
+     * @throws ApiException if the Api call fails
+     */
+    @Test
+    public void testQueryStyleDeepObjectExplodeTrueObjectAllOf() throws ApiException {
+        BirdAndCategory queryObject = new BirdAndCategory().id(12345L).name("Hello World").
+                color("red").size("small");
+
+        Assert.assertEquals("query_object[size]=small&query_object[color]=red&query_object[id]=12345&query_object[name]=Hello%20World", queryObject.toUrlQueryString("query_object"));
+
+        String response = api.testQueryStyleDeepObjectExplodeTrueObjectAllOf(queryObject);
+        org.openapitools.client.EchoServerResponseParser p = new org.openapitools.client.EchoServerResponseParser(response);
+        Assert.assertEquals("/query/style_deepObject/explode_true/object/allOf?query_object[size]=small&query_object[color]=red&query_object[id]=12345&query_object[name]=Hello%20World", p.path);
+    }
+
     /**
      * Test query parameter(s)
      * <p>

samples/client/echo_api/java/native/src/test/java/org/openapitools/client/model/BirdAndCategoryTest.java

@@ -0,0 +1,72 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for BirdAndCategory
+ */
+public class BirdAndCategoryTest {
+    private final BirdAndCategory model = new BirdAndCategory();
+
+    /**
+     * Model tests for BirdAndCategory
+     */
+    @Test
+    public void testBirdAndCategory() {
+        // TODO: test BirdAndCategory
+    }
+
+    /**
+     * Test the property 'size'
+     */
+    @Test
+    public void sizeTest() {
+        // TODO: test size
+    }
+
+    /**
+     * Test the property 'color'
+     */
+    @Test
+    public void colorTest() {
+        // TODO: test color
+    }
+
+    /**
+     * Test the property 'id'
+     */
+    @Test
+    public void idTest() {
+        // TODO: test id
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+}

samples/client/echo_api/java/native/src/test/java/org/openapitools/client/model/BirdTest.java

@@ -0,0 +1,56 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for Bird
+ */
+public class BirdTest {
+    private final Bird model = new Bird();
+
+    /**
+     * Model tests for Bird
+     */
+    @Test
+    public void testBird() {
+        // TODO: test Bird
+    }
+
+    /**
+     * Test the property 'size'
+     */
+    @Test
+    public void sizeTest() {
+        // TODO: test size
+    }
+
+    /**
+     * Test the property 'color'
+     */
+    @Test
+    public void colorTest() {
+        // TODO: test color
+    }
+
+}

samples/client/echo_api/java/native/src/test/java/org/openapitools/client/model/TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameterTest.java

@@ -0,0 +1,72 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter
+ */
+public class TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameterTest {
+    private final TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter model = new TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter();
+
+    /**
+     * Model tests for TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter
+     */
+    @Test
+    public void testTestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter() {
+        // TODO: test TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter
+    }
+
+    /**
+     * Test the property 'id'
+     */
+    @Test
+    public void idTest() {
+        // TODO: test id
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+    /**
+     * Test the property 'size'
+     */
+    @Test
+    public void sizeTest() {
+        // TODO: test size
+    }
+
+    /**
+     * Test the property 'color'
+     */
+    @Test
+    public void colorTest() {
+        // TODO: test color
+    }
+
+}