com.anrisoftware.resources.binary.internal.binaries.BinariesWorker Maven / Gradle / Ivy

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/*
 * Copyright 2012-2025 Erwin Müller 
 *
 * 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 com.anrisoftware.resources.binary.internal.binaries;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Locale;
import java.util.ResourceBundle;

import jakarta.inject.Inject;

import com.anrisoftware.resources.binary.external.BinariesBundlesMap;
import com.anrisoftware.resources.binary.external.BinariesMap;
import com.anrisoftware.resources.binary.external.BinaryResource;
import com.anrisoftware.resources.binary.external.BinaryResourceFactory;
import com.anrisoftware.resources.getbundle.external.GetBundle;
import com.google.inject.assistedinject.Assisted;

class BinariesWorker {

    private final BinariesWorkerLogger log;

    private final String name;

    private final Locale locale;

    private final GetBundle getBundle;

    private final BinariesBundlesMap bundles;

    private final BinaryResourceFactory resourceFactory;

    /**
     * Injects the dependencies.
     * 
     * @param logger          the {@link BinariesWorkerLogger} where the logging
     *                        messages are logged.
     * 
     * @param resourceFactory the {@link BinaryResourceFactory} to create a new
     *                        image resource.
     * 
     * @param name            the {@link String} name of the image resource we want
     *                        to get.
     * 
     * @param locale          the {@link Locale} of the image resource we want to
     *                        get.
     * 
     * @param getBundle       the {@link GetBundle} that returns the resource bundle
     *                        for the locale.
     * 
     * @param bundles         the map of bundles with their binary resources maps.
     */
    @Inject
    BinariesWorker(BinariesWorkerLogger logger, BinaryResourceFactory resourceFactory, @Assisted String name,
            @Assisted Locale locale, @Assisted GetBundle getBundle, @Assisted BinariesBundlesMap bundles) {
        this.log = logger;
        this.resourceFactory = resourceFactory;
        this.name = name;
        this.locale = locale;
        this.getBundle = getBundle;
        this.bundles = bundles;
    }

    /**
     * Returns the binary resource with the desired name and locale.
     * 
     * @return a {@link BinaryResource}.
     */
    public BinaryResource binaryResource() {
        ResourceBundle bundle = getBundle.bundleFor(locale);
        BinariesMap map = bundles.getBinaries(getBundle.getBaseName(), bundle);
        log.loadedResourceBundle(name, bundle);
        lazyLoadBinary(map, bundle);
        log.checkBinaryLoaded(map.haveBinary(name), name, locale, bundle);
        BinaryResource image = map.getBinary(name);
        return image;
    }

    private void lazyLoadBinary(BinariesMap map, ResourceBundle bundle) {
        if (map.haveBinary(name)) {
            return;
        }
        String location = bundle.getString(name);
        URL url = createURL(location, getBundle.getClassLoader());
        BinaryResource resource;
        if (url != null) {
            resource = resourceFactory.create(name, locale, url);
            addResource(map, resource);
        }
    }

    private URL createURL(String value, ClassLoader classLoader) {
        try {
            return new URL(value);
        } catch (MalformedURLException e) {
            if (classLoader == null) {
                classLoader = BinariesImpl.class.getClassLoader();
            }
            URL url = classLoader.getResource(value);
            return log.checkResourceURL(url, value);
        }
    }

    private void addResource(BinariesMap map, BinaryResource resource) {
        map.putBinary(resource);
        log.addedBinaryResource(resource);
    }

}