src/jdk.jlink/share/classes/jdk/tools/jlink/internal/ResourcePoolEntryFactory.java

/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package jdk.tools.jlink.internal;

import java.nio.file.Path;
import java.util.Objects;
import jdk.tools.jlink.plugin.ResourcePoolEntry;

public final class ResourcePoolEntryFactory {
    private ResourcePoolEntryFactory() {}

    public static ResourcePoolEntry create(String path,
            ResourcePoolEntry.Type type, byte[] content) {
        return new ByteArrayResourcePoolEntry(moduleFrom(path), path, type, content);
    }

    public static ResourcePoolEntry create(String path,
            ResourcePoolEntry.Type type, Path file) {
        return new PathResourcePoolEntry(moduleFrom(path), path, type, file);
    }

    public static ResourcePoolEntry create(ResourcePoolEntry original, byte[] content) {
        return new ByteArrayResourcePoolEntry(original.moduleName(),
                original.path(), original.type(), content);
    }

    public static ResourcePoolEntry create(ResourcePoolEntry original, Path file) {
        return new PathResourcePoolEntry(original.moduleName(),
                original.path(), original.type(), file);
    }

    public static ResourcePoolEntry createSymbolicLink(String path,
                                                       ResourcePoolEntry.Type type,
                                                       ResourcePoolEntry target) {
        return new SymLinkResourcePoolEntry(moduleFrom(path), path, type, target);
    }

    private static String moduleFrom(String path) {
        Objects.requireNonNull(path);
        if (path.isEmpty() || path.charAt(0) != '/') {
            throw new IllegalArgumentException(path + " must start with /");
        }
        String noRoot = path.substring(1);
        int idx = noRoot.indexOf('/');
        if (idx == -1) {
            throw new IllegalArgumentException("/ missing after module: " + path);
        }
        return noRoot.substring(0, idx);
    }
}