me.yanaga.winter.data.jpa.spring.config.metadata.EnableRepositoriesMetadata.java Source code

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Here is the source code for me.yanaga.winter.data.jpa.spring.config.metadata.EnableRepositoriesMetadata.java

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package me.yanaga.winter.data.jpa.spring.config.metadata;

/*
 * #%L
 * winter-data-jpa
 * %%
 * Copyright (C) 2015 Edson Yanaga
 * %%
 * 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.
 * #L%
 */

import com.google.common.collect.ImmutableList;
import me.yanaga.winter.data.jpa.spring.config.EnableRepositories;
import org.springframework.core.type.AnnotationMetadata;

import java.util.Arrays;
import java.util.List;

import static java.util.stream.Collectors.collectingAndThen;
import static java.util.stream.Collectors.toList;

public class EnableRepositoriesMetadata {

    private static final String ANNOTATION_NAME = EnableRepositories.class.getName();

    private static final String VALUE = "value";

    private static final String BASE_PACKAGES = "basePackages";

    private static final String BASE_PACKAGE_CLASSES = "basePackageClasses";

    private List<String> packagesToScan;

    private EnableRepositoriesMetadata(List<String> packagesToScan) {
        this.packagesToScan = packagesToScan;
    }

    public static EnableRepositoriesMetadata of(AnnotationMetadata annotationMetadata) {
        List<String> packageAttributes = getPackageAttributes(annotationMetadata);
        if (packageAttributes.stream().allMatch(l -> l.isEmpty())) {
            return new EnableRepositoriesMetadata(
                    ImmutableList.of(obtainPackageName(annotationMetadata.getClassName())));
        }
        return new EnableRepositoriesMetadata(packageAttributes);
    }

    private static String obtainPackageName(String className) {
        int lastIndexOf = className.lastIndexOf('.');
        return lastIndexOf != -1 ? className.substring(0, lastIndexOf) : "";
    }

    private static List<String> getPackageAttributes(AnnotationMetadata annotationMetadata) {
        return ImmutableList.<String>builder().addAll(getValueAttributes(annotationMetadata))
                .addAll(getBasePackagesAttributes(annotationMetadata))
                .addAll(getBasePackageClassesAttributes(annotationMetadata)).build();
    }

    private static List<String> getValueAttributes(AnnotationMetadata annotationMetadata) {
        return ImmutableList
                .copyOf((String[]) annotationMetadata.getAnnotationAttributes(ANNOTATION_NAME).get(VALUE));
    }

    private static List<String> getBasePackagesAttributes(AnnotationMetadata annotationMetadata) {
        return ImmutableList
                .copyOf((String[]) annotationMetadata.getAnnotationAttributes(ANNOTATION_NAME).get(BASE_PACKAGES));
    }

    private static List<String> getBasePackageClassesAttributes(AnnotationMetadata annotationMetadata) {
        Class<?>[] basePackageClasses = (Class<?>[]) annotationMetadata.getAnnotationAttributes(ANNOTATION_NAME)
                .get(BASE_PACKAGE_CLASSES);
        return Arrays.stream(basePackageClasses).map(k -> k.getPackage().getName())
                .collect(collectingAndThen(toList(), ImmutableList::copyOf));
    }

    public List<String> getPackagesToScan() {
        return packagesToScan;
    }

}