de.alpharogroup.io.annotations.ImportResourcesExtensions.java Source code

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Here is the source code for de.alpharogroup.io.annotations.ImportResourcesExtensions.java

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/**
 * The MIT License
 *
 * Copyright (C) 2015 Asterios Raptis
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package de.alpharogroup.io.annotations;

import java.io.IOException;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

import org.apache.commons.lang.ArrayUtils;

import de.alpharogroup.lang.AnnotationExtensions;

/**
 * The class {@link ImportResourcesExtensions} contains extension methods for {@link ImportResource}
 * objects.
 */
public class ImportResourcesExtensions {

    /**
     * Gets a {@link Map} with {@link ImportResource} objects and the corresponding to the found
     * class from the given package Name. The search is made recursive. The key from an entry of the
     * map is the class where the {@link ImportResource} objects found and the value is an Array of
     * the {@link ImportResource} objects that contains in the class.
     *
     * @param packageName
     *            the package name
     * @return the import resources
     * @throws ClassNotFoundException
     *             occurs if a given class cannot be located by the specified class loader
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    public static Map<Class<?>, ImportResource[]> getImportResources(final String packageName)
            throws ClassNotFoundException, IOException {
        final Map<Class<?>, ImportResource[]> resourcesMap = new LinkedHashMap<>();

        final Class<ImportResources> importResourcesClass = ImportResources.class;
        final Class<ImportResource> importResourceClass = ImportResource.class;
        final Set<Class<?>> importResourcesClasses = AnnotationExtensions.getAllAnnotatedClasses(packageName,
                importResourcesClass);
        final Set<Class<?>> importResourceClasses = AnnotationExtensions.getAllAnnotatedClasses(packageName,
                importResourceClass);
        importResourcesClasses.addAll(importResourceClasses);
        for (final Class<?> annotatedClass : importResourcesClasses) {
            final ImportResources importResources = annotatedClass.getAnnotation(ImportResources.class);
            ImportResource[] importResourcesArray = null;
            ImportResource[] importResourceArray = null;
            if (importResources != null) {
                importResourcesArray = importResources.resources();
            }

            final ImportResource importResource = annotatedClass.getAnnotation(ImportResource.class);
            if (importResource != null) {
                importResourceArray = new ImportResource[1];
                importResourceArray[0] = importResource;
            }
            final ImportResource[] array = (ImportResource[]) ArrayUtils.addAll(importResourceArray,
                    importResourcesArray);
            Arrays.sort(array, new ImportResourceComparator());
            resourcesMap.put(annotatedClass, array);

        }
        return resourcesMap;
    }
}