autonomouslogic/dynamo-mapper

package com.autonomouslogic.dynamomapper.codegen.generate.keyobject;

import static com.autonomouslogic.dynamomapper.codegen.generate.SyncMapperGenerator.REQUEST;
import static com.autonomouslogic.dynamomapper.codegen.util.TypeHelper.CLASS_T;

import com.autonomouslogic.dynamomapper.codegen.util.TypeHelper;
import com.squareup.javapoet.AnnotationSpec;
import com.squareup.javapoet.ClassName;
import com.squareup.javapoet.MethodSpec;
import com.squareup.javapoet.ParameterizedTypeName;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.lang.model.element.Modifier;
import lombok.Data;
import lombok.NoArgsConstructor;

@NoArgsConstructor
@Data
public class SyncKeyObjectWrapperGenerator extends KeyObjectWrapperGenerator {
    public MethodSpec generate() {
        // Create signature.
        var wrapper = MethodSpec.methodBuilder(methodNameFactory.create(method, "FromKeyObject", multiple))
                .addModifiers(Modifier.PUBLIC)
                .addTypeVariable(TypeHelper.T);
        wrapper.returns(method.returnType);
        wrapper.addExceptions(method.exceptions);
        wrapper.addException(IOException.class);
        wrapper.addAnnotation(AnnotationSpec.builder(SuppressWarnings.class)
                .addMember("value", "\"unchecked\"")
                .build());
        // Add parameters.
        if (!multiple) {
            wrapper.addParameter(TypeHelper.T, "keyObject");
        } else {
            var type = ParameterizedTypeName.get(ClassName.get(List.class), TypeHelper.T);
            wrapper.addParameter(type, "keyObject");
            wrapper.addParameter(CLASS_T, "clazz");
        }

        var params = new ArrayList<>(method.parameters);
        params.removeIf(p -> p.name.equals(REQUEST));
        params.removeIf(p -> p.name.equals("clazz"));
        wrapper.addParameters(params);
        // Write body.
        wrapper.addStatement("var builder = requestFactory.$L(keyObject)", factoryMethodName);
        var firstParamTypeName = method.parameters.get(0).type;
        if (firstParamTypeName instanceof ParameterizedTypeName) {
            wrapper.addStatement("consumer.accept(builder)");
        }
        if (!multiple) {
            wrapper.addStatement("return $L(builder.build(), ($T) keyObject.getClass())", method.name, CLASS_T);
        } else {
            wrapper.addStatement("return $L(builder.build(), clazz)", method.name);
        }

        TypeHelper.nonNullParameters(wrapper);
        return wrapper.build();
    }
}