auto.http.internal.codegen.AutoHttpProcessingStep.java Source code

Introduction

Here is the source code for auto.http.internal.codegen.AutoHttpProcessingStep.java

Source

/*
 * Copyright 2016 BiaoWu
    
 * 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 auto.http.internal.codegen;

import com.google.auto.common.BasicAnnotationProcessor;
import com.google.auto.common.MoreElements;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.SetMultimap;

import java.lang.annotation.Annotation;
import java.util.Set;

import javax.annotation.processing.Messager;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;

import auto.http.AutoHttp;

/**
 * @author biaowu
 */
final class AutoHttpProcessingStep implements BasicAnnotationProcessor.ProcessingStep {
    private final Messager messager;
    private final AutoHttpGenerator autoHttpGenerator;
    private final AutoHttpValidator autoHttpValidator;
    private final MethodValidator methodValidator;

    AutoHttpProcessingStep(Messager messager, AutoHttpGenerator autoHttpGenerator,
            AutoHttpValidator autoHttpValidator, MethodValidator methodValidator) {
        this.messager = messager;
        this.autoHttpGenerator = autoHttpGenerator;
        this.autoHttpValidator = autoHttpValidator;
        this.methodValidator = methodValidator;
    }

    @Override
    public Set<? extends Class<? extends Annotation>> annotations() {
        return ImmutableSet.of(AutoHttp.class);
    }

    @Override
    public Set<Element> process(SetMultimap<Class<? extends Annotation>, Element> elementsByAnnotation) {
        ImmutableSet.Builder<TypeElement> validAutoHttpTypesBuilder = ImmutableSet.builder();
        for (Element autoHttpElement : elementsByAnnotation.get(AutoHttp.class)) {
            TypeElement autoHttpTypeElement = MoreElements.asType(autoHttpElement);

            ValidationReport<TypeElement> report = autoHttpValidator.validate(autoHttpTypeElement);
            report.printMessagesTo(messager);
            if (report.isClean()) {
                validAutoHttpTypesBuilder.add(autoHttpTypeElement);
            }
        }

        for (TypeElement validAutoHttpTypeElement : validAutoHttpTypesBuilder.build()) {
            ImmutableList.Builder<ExecutableElement> validMethodsBuilder = ImmutableList.builder();
            for (Element declaredElement : validAutoHttpTypeElement.getEnclosedElements()) {
                if (declaredElement.getKind() == ElementKind.METHOD) {
                    ExecutableElement methodElement = MoreElements.asExecutable(declaredElement);

                    ValidationReport<ExecutableElement> report = methodValidator.validate(methodElement);
                    report.printMessagesTo(messager);
                    if (report.isClean()) {
                        validMethodsBuilder.add(methodElement);
                    }
                }
            }

            try {
                AutoHttpDescriptor autoHttpDescriptor = AutoHttpDescriptor.Factory.create(validAutoHttpTypeElement,
                        validMethodsBuilder.build());

                for (AutoHttpDescriptor.MethodDescriptor methodDescriptor : autoHttpDescriptor.methodElements()) {
                    messager.printMessage(Diagnostic.Kind.NOTE, "returnType = " + methodDescriptor.returnType());
                    messager.printMessage(Diagnostic.Kind.NOTE,
                            "converterType = " + methodDescriptor.converterType());
                }

                autoHttpGenerator.generate(autoHttpDescriptor);
            } catch (SourceFileGenerationException e) {
                e.printMessageTo(messager);
            } catch (ClassNotFoundException e) {
                messager.printMessage(Diagnostic.Kind.ERROR, "class not found!-->" + e.getMessage());
            }
        }
        return ImmutableSet.of();
    }
}