mojo/public/tools/bindings/generators/java_templates/struct_definition.tmpl

{% from "constant_definition.tmpl" import constant_def %}
{% from "enum_definition.tmpl" import enum_def %}

{%- macro inequality(kind, v1, v2) -%}
{%-   if kind|is_reference_kind -%}
{%-     if kind|is_array_kind -%}
{%-       if kind.kind|is_reference_kind -%}
!java.util.Arrays.deepEquals({{v1}}, {{v2}})
{%-       else -%}
!java.util.Arrays.equals({{v1}}, {{v2}})
{%-       endif -%}
{%-     else -%}
!org.chromium.mojo.bindings.BindingsHelper.equals({{v1}}, {{v2}})
{%-     endif -%}
{%-   else -%}
{{v1}} != {{v2}}
{%-   endif -%}
{%- endmacro -%}

{%- macro hash(kind, v) -%}
{%-   if kind|is_array_kind -%}
{%-     if kind.kind|is_reference_kind -%}
java.util.Arrays.deepHashCode({{v}})
{%-     else -%}
java.util.Arrays.hashCode({{v}})
{%-     endif -%}
{%-   else -%}
org.chromium.mojo.bindings.BindingsHelper.hashCode({{v}})
{%-   endif -%}
{%- endmacro -%}

{% macro encode(variable, kind, offset, bit, level=0, check_for_null=True) %}
{% if kind|is_pointer_array_kind %}
{% set sub_kind = kind.kind %}
{%   if check_for_null %}
if ({{variable}} == null) {
    encoder{{level}}.encodeNullPointer({{offset}}, {{kind|is_nullable_kind|java_true_false}});
} else {
{%   else %}
{
{%   endif %}
    org.chromium.mojo.bindings.Encoder encoder{{level + 1}} = encoder{{level}}.encodePointerArray({{variable}}.length, {{offset}}, {{kind|array_expected_length}});
    for (int i{{level}} = 0; i{{level}} < {{variable}}.length; ++i{{level}}) {
        {{encode(variable~'[i'~level~']', sub_kind, 'DataHeader.HEADER_SIZE + org.chromium.mojo.bindings.BindingsHelper.POINTER_SIZE * i'~level, 0, level+1)|indent(8)}}
    }
}
{% elif kind|is_map_kind %}
if ({{variable}} == null) {
    encoder{{level}}.encodeNullPointer({{offset}}, {{kind|is_nullable_kind|java_true_false}});
} else {
    org.chromium.mojo.bindings.Encoder encoder{{level + 1}} = encoder{{level}}.encoderForMap({{offset}});
    int size{{level}} = {{variable}}.size();
    {{kind.key_kind|java_type}}[] keys{{level}} = {{kind.key_kind|array|new_array('size'~level)}};
    {{kind.value_kind|java_type}}[] values{{level}} = {{kind.value_kind|array|new_array('size'~level)}};
    int index{{level}} = 0;
    for (java.util.Map.Entry<{{kind.key_kind|java_type(true)}}, {{kind.value_kind|java_type(true)}}> entry{{level}} : {{variable}}.entrySet()) {
        keys{{level}}[index{{level}}] = entry{{level}}.getKey();
        values{{level}}[index{{level}}] = entry{{level}}.getValue();
        ++index{{level}};
    }
    {{encode('keys'~level, kind.key_kind|array, 'DataHeader.HEADER_SIZE', 0, level+1, False)|indent(4)}}
    {{encode('values'~level, kind.value_kind|array, 'DataHeader.HEADER_SIZE + org.chromium.mojo.bindings.BindingsHelper.POINTER_SIZE', 0, level+1, False)|indent(4)}}
}
{% else %}
encoder{{level}}.{{kind|encode_method(variable, offset, bit)}};
{% endif %}
{% endmacro %}

{% macro decode(variable, kind, offset, bit, level=0) %}
{% if kind|is_struct_kind or
      kind|is_pointer_array_kind or
      kind|is_map_kind or
      kind|is_union_kind %}
org.chromium.mojo.bindings.Decoder decoder{{level+1}} = decoder{{level}}.readPointer({{offset}}, {{kind|is_nullable_kind|java_true_false}});
{%   if kind|is_struct_kind or kind|is_union_kind %}
{{variable}} = {{kind|java_type}}.decode(decoder{{level+1}});
{%   else %}{# kind|is_pointer_array_kind or is_map_kind #}
{%     if kind|is_nullable_kind %}
if (decoder{{level+1}} == null) {
    {{variable}} = null;
} else {
{%     else %}
{
{%     endif %}
{%     if kind|is_map_kind %}
    decoder{{level+1}}.readDataHeaderForMap();
    {{kind.key_kind|java_type}}[] keys{{level}};
    {{kind.value_kind|java_type}}[] values{{level}};
    {
        {{decode('keys'~level, kind.key_kind|array, 'DataHeader.HEADER_SIZE', 0, level+1)|indent(8)}}
    }
    {
        {{decode('values'~level, kind.value_kind|array('keys'~level~'.length'), 'DataHeader.HEADER_SIZE + org.chromium.mojo.bindings.BindingsHelper.POINTER_SIZE', 0, level+1)|indent(8)}}
    }
    {{variable}} = new java.util.HashMap<{{kind.key_kind|java_type(true)}}, {{kind.value_kind|java_type(true)}}>();
    for (int index{{level}} = 0; index{{level}} < keys{{level}}.length; ++index{{level}}) {
        {{variable}}.put(keys{{level}}[index{{level}}],  values{{level}}[index{{level}}]);
    }
{%     else %}
    DataHeader si{{level+1}} = decoder{{level+1}}.readDataHeaderForPointerArray({{kind|array_expected_length}});
    {{variable}} = {{kind|new_array('si'~(level+1)~'.elementsOrVersion')}};
    for (int i{{level+1}} = 0; i{{level+1}} < si{{level+1}}.elementsOrVersion; ++i{{level+1}}) {
        {{decode(variable~'[i'~(level+1)~']', kind.kind, 'DataHeader.HEADER_SIZE + org.chromium.mojo.bindings.BindingsHelper.POINTER_SIZE * i'~(level+1), 0, level+1)|indent(8)}}
    }
{%     endif %}
}
{%   endif %}
{% else %}
{{variable}} = decoder{{level}}.{{kind|decode_method(offset, bit)}};
{% endif %}
{% endmacro %}

{% macro struct_def(struct, inner_class=False) %}
{{'static' if inner_class else 'public'}} final class {{struct|name}} extends org.chromium.mojo.bindings.Struct {

    private static final int STRUCT_SIZE = {{struct.versions[-1].num_bytes}};
    private static final DataHeader[] VERSION_ARRAY = new DataHeader[] {
{%-   for version in struct.versions -%}
        new DataHeader({{version.num_bytes}}, {{version.version}}){% if not loop.last %}, {% endif -%}
{%-   endfor -%}
    };
    private static final DataHeader DEFAULT_STRUCT_INFO = VERSION_ARRAY[{{struct.versions|length - 1}}];
{%  for constant in struct.constants %}

    {{constant_def(constant)|indent(4)}}
{%  endfor %}
{%  for enum in struct.enums %}

    {{enum_def(enum, false)|indent(4)}}
{% endfor %}
{% if struct.fields %}

{%   for field in struct.fields %}
    public {{field.kind|java_type}} {{field|name}};
{%   endfor %}
{% endif %}

    private {{struct|name}}(int version) {
        super(STRUCT_SIZE, version);
{% for field in struct.fields %}
{%   if field.default %}
        {{field|name}} = {{field|default_value}};
{%   elif field.kind|is_any_handle_kind and not field.kind|is_interface_request_kind %}
        {{field|name}} = org.chromium.mojo.system.InvalidHandle.INSTANCE;
{%   endif %}
{% endfor %}
    }

    public {{struct|name}}() {
        this({{struct.versions[-1].version}});
    }

    public static {{struct|name}} deserialize(org.chromium.mojo.bindings.Message message) {
        return decode(new org.chromium.mojo.bindings.Decoder(message));
    }

    @SuppressWarnings("unchecked")
    public static {{struct|name}} decode(org.chromium.mojo.bindings.Decoder decoder0) {
        if (decoder0 == null) {
            return null;
        }
        DataHeader mainDataHeader = decoder0.readAndValidateDataHeader(VERSION_ARRAY);
        {{struct|name}} result = new {{struct|name}}(mainDataHeader.elementsOrVersion);
{% for byte in struct.bytes %}
{%   for packed_field in byte.packed_fields %}
        if (mainDataHeader.elementsOrVersion >= {{packed_field.min_version}}) {
            {{decode('result.' ~ packed_field.field|name, packed_field.field.kind, 8+packed_field.offset, packed_field.bit)|indent(12)}}
        }
{%   endfor %}
{% endfor %}
        return result;
    }

    @SuppressWarnings("unchecked")
    @Override
    protected final void encode(org.chromium.mojo.bindings.Encoder encoder) {
{% if not struct.bytes %}
        encoder.getEncoderAtDataOffset(DEFAULT_STRUCT_INFO);
{% else %}
        org.chromium.mojo.bindings.Encoder encoder0 = encoder.getEncoderAtDataOffset(DEFAULT_STRUCT_INFO);
{% endif %}
{% for byte in struct.bytes %}
{%   for packed_field in byte.packed_fields %}
        {{encode(packed_field.field|name, packed_field.field.kind, 8+packed_field.offset, packed_field.bit)|indent(8)}}
{%   endfor %}
{% endfor %}
    }

    /**
     * @see Object#equals(Object)
     */
    @Override
    public boolean equals(Object object) {
        if (object == this)
            return true;
        if (object == null)
            return false;
        if (getClass() != object.getClass())
            return false;
{% if struct.fields|length %}
        {{struct|name}} other = ({{struct|name}}) object;
{%   for field in struct.fields %}
        if ({{inequality(field.kind, field|name, 'other.'~field|name)}})
            return false;
{%   endfor %}
{% endif %}
        return true;
    }

    /**
     * @see Object#hashCode()
     */
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = prime + getClass().hashCode();
{% for field in struct.fields %}
        result = prime * result + {{hash(field.kind, field|name)}};
{% endfor %}
        return result;
    }
}
{% endmacro %}