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Added convenient create functions for Java/C#.

Browse Source 
Bug: 15777857
Tested: on Linux and Windows.

Change-Id: I25db724349e2c801bb0e41137540507acd57cd03
This commit is contained in:
Wouter van Oortmerssen
2014-09-18 16:05:41 -07:00
parent bdaedebef9
commit d6ed127cf4
3 changed files with 63 additions and 8 deletions
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61
src/idl_gen_general.cpp
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@@ -10,7 +10,7 @@
* 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 GeneratorOptions::Language governing permissions and
* See the License for the specific language governing permissions and
* limitations under the License.
*/
@@ -409,18 +409,71 @@ static void GenStruct(const LanguageParameters &lang, const Parser &parser,
code += " return builder.";
code += FunctionStart(lang, 'O') + "ffset();\n }\n";
} else {
// Create a set of static methods that allow table construction,
// Generate a method that creates a table in one go. This is only possible
// when the table has no struct fields, since those have to be created
// inline, and there's no way to do so in Java.
bool has_no_struct_fields = true;
int num_fields = 0;
for (auto it = struct_def.fields.vec.begin();
it != struct_def.fields.vec.end(); ++it) {
auto &field = **it;
if (field.deprecated) continue;
if (IsStruct(field.value.type)) {
has_no_struct_fields = false;
} else {
num_fields++;
}
}
if (has_no_struct_fields && num_fields) {
// Generate a table constructor of the form:
// public static void createName(FlatBufferBuilder builder, args...)
code += " public static void " + FunctionStart(lang, 'C') + "reate";
code += struct_def.name;
code += "(FlatBufferBuilder builder";
for (auto it = struct_def.fields.vec.begin();
it != struct_def.fields.vec.end(); ++it) {
auto &field = **it;
if (field.deprecated) continue;
code += ",\n " + GenTypeBasic(lang, field.value.type) + " ";
code += field.name;
// Java doesn't have defaults, which means this method must always
// supply all arguments, and thus won't compile when fields are added.
if (lang.language != GeneratorOptions::kJava)
code += " = " + field.value.constant;
}
code += ") {\n builder.";
code += FunctionStart(lang, 'S') + "tartObject(";
code += NumToString(struct_def.fields.vec.size()) + ");\n";
for (size_t size = struct_def.sortbysize ? sizeof(largest_scalar_t) : 1;
size;
size /= 2) {
for (auto it = struct_def.fields.vec.rbegin();
it != struct_def.fields.vec.rend(); ++it) {
auto &field = **it;
if (!field.deprecated &&
(!struct_def.sortbysize ||
size == SizeOf(field.value.type.base_type))) {
code += " " + struct_def.name + ".";
code += FunctionStart(lang, 'A') + "dd";
code += MakeCamel(field.name) + "(builder, " + field.name + ");\n";
}
}
}
code += " builder.";
code += FunctionStart(lang, 'E') + "ndObject();\n }\n\n";
}
// Generate a set of static methods that allow table construction,
// of the form:
// public static void addName(FlatBufferBuilder builder, short name)
// { builder.addShort(id, name, default); }
// Unlike the Create function, these always work.
code += " public static void " + FunctionStart(lang, 'S') + "tart";
code += struct_def.name;
code += "(FlatBufferBuilder builder) { builder.";
code += FunctionStart(lang, 'S') + "tartObject(";
code += NumToString(struct_def.fields.vec.size()) + "); }\n";
for (auto it = struct_def.fields.vec.begin();
it != struct_def.fields.vec.end();
++it) {
it != struct_def.fields.vec.end(); ++it) {
auto &field = **it;
if (field.deprecated) continue;
code += " public static void " + FunctionStart(lang, 'A') + "dd";