scripts/py_matter_idl/matter_idl/generators/java/ChipEventStructs_java.jinja

{%- macro encode_value(source, encodable, depth) -%}
  {%- if encodable.is_nullable -%}
    @Nullable {{encode_value(source, encodable.without_nullable(), depth + 1)}}
  {%- elif encodable.is_optional -%}
    Optional<{{encode_value(source, encodable.without_optional(), depth + 1)}}>
  {%- elif encodable.is_list -%}
    ArrayList<{{encode_value(source, encodable.without_list(), depth + 1)}}>
  {%- elif encodable.is_struct -%}
    {%- set struct = encodable.get_underlying_struct() -%}
    ChipStructs.{{source.name}}Cluster{{struct.name}}
  {%- else -%}
    {{encodable.boxed_java_type}}
  {%- endif -%}
{%- endmacro -%}

{%- macro encode_tlv(source, encodable, variable, depth) -%}
  {%- if encodable.is_nullable -%}
    {{variable}} != null ? {{encode_tlv(source, encodable.without_nullable(), variable, depth + 1)}} : new NullType()
  {%- elif encodable.is_optional -%}
    {{variable}}.<BaseTLVType>map(({{"nonOptional{}".format(variable)}}) -> {{encode_tlv(source, encodable.without_optional(), "nonOptional{}".format(variable), depth + 1)}}).orElse(new EmptyType())
  {%- elif encodable.is_list -%}
    ArrayType.generateArrayType({{variable}}, ({{"element{}".format(variable)}}) -> {{encode_tlv(source, encodable.without_list(), "element{}".format(variable), depth + 1)}})
  {%- elif encodable.is_struct -%}
    {%- set struct = encodable.get_underlying_struct() -%}
    {{variable}}.encodeTlv()
  {%- else -%}
    new {{encodable.java_tlv_type}}Type({{variable}})
  {%- endif -%}
{%- endmacro -%}

{%- macro decode_tlv(source, encodable, variable, depth) -%}
  {%- if encodable.is_optional -%}
    Optional.of({{decode_tlv(source, encodable.without_optional(), variable, depth + 1)}})
  {%- elif encodable.is_list -%}
    {{variable}}.map(({{"element{}".format(variable)}}) -> {{decode_tlv(source, encodable.without_list(), "element{}".format(variable), depth + 1)}})
  {%- elif encodable.is_struct -%}
    {%- set struct = encodable.get_underlying_struct() -%}
    ChipStructs.{{source.name}}Cluster{{struct.name}}.decodeTlv({{variable}})
  {%- else -%}
    {{variable}}.value({{encodable.boxed_java_type}}.class)
  {%- endif -%}
{%- endmacro -%}

{%- macro get_tlvType(encodable) -%}
  {%- if encodable.is_list -%}
    Array
  {%- elif encodable.is_struct -%}
    Struct
  {%- else -%}
    {{encodable.java_tlv_type}}
  {%- endif -%}
{%- endmacro -%}

/*
 *
 *    Copyright (c) 2023 Project CHIP 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 chip.devicecontroller;

import javax.annotation.Nullable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Optional;

import static chip.devicecontroller.ChipTLVType.*;

public class ChipEventStructs {
{%- for cluster in clientClusters | sort(attribute='code') -%}
{%- set typeLookup = idl | createLookupContext(cluster) %}
{%- for event in cluster.events %}
public static class {{cluster.name}}Cluster{{event.name}}Event {
  {%- for field in event.fields %}
  {%- set encodable = field | asEncodable(typeLookup) %}
  public {{encode_value(cluster, encodable, 0)}} {{field.name}};
  {%- endfor %}

  {%- for field in event.fields %}
  {%- set encodable = field | asEncodable(typeLookup) %}
  private static final long {{field.name | constcase}}_ID = {{field.code}}L;
  {%- endfor %}

  public {{cluster.name}}Cluster{{event.name}}Event(
    {%- for field in event.fields %}
    {%- set encodable = field | asEncodable(typeLookup) %}
    {{encode_value(cluster, encodable, 0)}} {{field.name}}
    {%- if loop.index0 < loop.length - 1 -%}{{","}}{%- endif -%}
    {%- endfor %}
  ) {
    {%- for field in event.fields %}
    {%- set encodable = field | asEncodable(typeLookup) %}
    this.{{field.name}} = {{field.name}};
    {%- endfor %}
  }

  public StructType encodeTlv() {
    ArrayList<StructElement> values = new ArrayList<>();
    {%- for field in event.fields %}
    {%- set encodable = field | asEncodable(typeLookup) %}
    values.add(new StructElement({{field.name | constcase}}_ID, {{encode_tlv(cluster, encodable, field.name, 0)}}));
    {%- endfor %}

    return new StructType(values);
  }

  public static {{cluster.name}}Cluster{{event.name}}Event decodeTlv(BaseTLVType tlvValue) {
    if (tlvValue == null || tlvValue.type() != TLVType.Struct) {
      return null;
    }

    {%- for field in event.fields %}
{%- set encodable = field | asEncodable(typeLookup) %}
{%- set encodable2 = field | asEncodable(typeLookup) %}
    {{encode_value(cluster, encodable, 0)}} {{field.name | lowfirst_except_acronym}}
{%- if encodable2.is_nullable -%}
{{" = null"}}
{%- elif encodable2.is_optional -%}
{{" = Optional.empty()"}}
{%- else -%}
{{" = null"}}
{%- endif -%}
;
{%- endfor %}
{%- if event.fields %}
    for (StructElement element: ((StructType)tlvValue).value()) {
{%- for field in event.fields -%}
{%- set encodable = field | asEncodable(typeLookup) %}
      {% if loop.index0 > 0 -%}{{"} else "}}{%- endif -%}if (element.contextTagNum() == {{field.name | constcase}}_ID) {
        if (element.value(BaseTLVType.class).type() == TLVType.{{get_tlvType(encodable)}}) {
          {{get_tlvType(encodable)}}Type castingValue = element.value({{get_tlvType(encodable)}}Type.class);
          {{field.name | lowfirst_except_acronym}} = {{decode_tlv(cluster, encodable, "castingValue", 0)}};
        }
{%- endfor -%}
{% raw %}
      }
{%- endraw %}
    }
{%- endif %}
    return new {{cluster.name}}Cluster{{event.name}}Event(
  {%- for field in event.fields %}
      {{field.name}}{%- if loop.index0 < loop.length - 1 -%}{{","}}{%- endif %}
  {%- endfor %}
    );
  }

  @Override
  public String toString() {
    StringBuilder output = new StringBuilder();
    output.append("{{cluster.name}}Cluster{{event.name}}Event {\n");
    {%- for field in event.fields %}
    {%- set encodable = field | asEncodable(typeLookup) %}
    output.append("\t{{field.name}}: ");
    {%- if encodable.is_list %}
    output.append({{field.name}});
    {%- elif encodable.is_octet_string %}
    {%- if encodable.is_optional %}
    output.append({{field.name}}.isPresent() ? Arrays.toString({{field.name}}.get()) : "");
    {%- else %}
    output.append(Arrays.toString({{field.name}}));
    {%- endif %}
    {%- else %}
    output.append({{field.name}});
    {%- endif %}
    output.append("\n");
    {%- endfor %}
    output.append("}\n");
    return output.toString();
  }
}
{%- endfor %}
{%- endfor %}
}