001/*
002 * JDrupes Builder
003 * Copyright (C) 2025 Michael N. Lipp
004 * 
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
017 */
018
019package org.jdrupes.builder.java;
020
021import java.nio.file.Path;
022import java.util.Optional;
023import org.jdrupes.builder.api.Project;
024import org.jdrupes.builder.api.Resource;
025import org.jdrupes.builder.api.ResourceFactory;
026import org.jdrupes.builder.api.ResourceType;
027import static org.jdrupes.builder.core.CoreResourceFactory.*;
028
029/// A factory for creating Java related resource objects.
030///
031public class JavaResourceFactory implements ResourceFactory {
032
033    /// Instantiates a new java resource factory.
034    ///
035    public JavaResourceFactory() {
036        // Make javadoc happy
037    }
038
039    @SuppressWarnings({ "unchecked" })
040    @Override
041    public <T extends Resource> Optional<T> newResource(ResourceType<T> type,
042            Project project, Object... args) {
043        // ? extends ClassTree
044        var candidate = createNarrowed(type, ClassTree.class,
045            () -> new DefaultClassTree((ResourceType<? extends ClassTree>) type,
046                project, (Path) args[0]));
047        if (candidate.isPresent()) {
048            return candidate;
049        }
050
051        // ? extends LibraryJarFile
052        candidate = createNarrowed(type, LibraryJarFile.class,
053            () -> new DefaultLibraryJarFile(
054                (ResourceType<? extends LibraryJarFile>) type, (Path) args[0]));
055        if (candidate.isPresent()) {
056            return candidate;
057        }
058
059        // ? extends JarFile
060        candidate = createNarrowed(type, JarFile.class,
061            () -> new DefaultJarFile((ResourceType<? extends JarFile>) type,
062                (Path) args[0]));
063        if (candidate.isPresent()) {
064            return candidate;
065        }
066
067        // ? extends JavaResourceTree
068        candidate = createNarrowed(type, JavaResourceTree.class,
069            () -> new DefaultJavaResourceTree(
070                (ResourceType<? extends JavaResourceTree>) type,
071                project, (Path) args[0], (String) args[1]));
072        if (candidate.isPresent()) {
073            return candidate;
074        }
075
076        // ManifestAttributes
077        if (ManifestAttributes.class.equals(type.rawType())) {
078            return Optional.of((T) new ManifestAttributes());
079        }
080        return Optional.empty();
081    }
082
083}