dagger.internal.codegen.MultibindingsProcessingStep.java Source code

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Here is the source code for dagger.internal.codegen.MultibindingsProcessingStep.java

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/*
 * Copyright (C) 2015 Google, Inc.
 *
 * 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 dagger.internal.codegen;

import com.google.auto.common.BasicAnnotationProcessor.ProcessingStep;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.SetMultimap;
import dagger.Multibindings;
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.TypeElement;

import static javax.lang.model.util.ElementFilter.typesIn;

/**
 * Processes elements annotated with {@link Multibindings @Multibindings}.
 */
class MultibindingsProcessingStep implements ProcessingStep {
    private final Messager messager;
    private final MultibindingsValidator multibindingsValidator;

    MultibindingsProcessingStep(Messager messager, MultibindingsValidator multibindingsValidator) {
        this.messager = messager;
        this.multibindingsValidator = multibindingsValidator;
    }

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

    @Override
    public Set<Element> process(SetMultimap<Class<? extends Annotation>, Element> elementsByAnnotation) {
        for (TypeElement element : typesIn(elementsByAnnotation.values())) {
            multibindingsValidator.validate(element).printMessagesTo(messager);
        }
        return ImmutableSet.of();
    }
}