org.wildfly.swarm.bootstrap.modules.BootstrapClasspathModuleFinder Maven / Gradle / Ivy

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WildFly Swarm: Bootstrap
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/**
 * Copyright 2015-2016 Red Hat, Inc, and individual contributors.
 *
 * 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 org.wildfly.swarm.bootstrap.modules;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import org.jboss.modules.ModuleFinder;
import org.jboss.modules.ModuleIdentifier;
import org.jboss.modules.ModuleLoadException;
import org.jboss.modules.ModuleLoader;
import org.jboss.modules.ModuleSpec;
import org.jboss.modules.xml.ModuleXmlParser;

/**
 * Used only for loading dependencies of org.wildfly.bootstrap:main from its own jar.
 *
 * @author Bob McWhirter
 */
public class BootstrapClasspathModuleFinder implements ModuleFinder {

    public String toString() {
        return getClass().getSimpleName();
    }

    @Override
    public ModuleSpec findModule(ModuleIdentifier identifier, ModuleLoader delegateLoader) throws ModuleLoadException {
        final String path = "modules/" + identifier.getName().replace('.', '/') + "/" + identifier.getSlot() + "/module.xml";

        ClassLoader cl = BootstrapClasspathModuleFinder.class.getClassLoader();
        URL url = cl.getResource(path);

        if (url == null) {
            return null;
        }

        //System.err.println( "BootstrapClasspathModuleFinder: " + identifier );

        ModuleSpec moduleSpec = null;
        InputStream in = null;
        try {
            final URL base = new URL(url, "./");
            in = url.openStream();
            moduleSpec = ModuleXmlParser.parseModuleXml(
                    (rootPath, loaderPath, loaderName) -> NestedJarResourceLoader.loaderFor(base, rootPath, loaderPath, loaderName),
                    MavenResolvers.get(),
                    "/",
                    in,
                    path.toString(),
                    delegateLoader,
                    identifier);

        } catch (IOException e) {
            e.printStackTrace();
            throw new ModuleLoadException(e);
        } catch (Throwable t) {
            t.printStackTrace();
            throw t;
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException e) {
                throw new ModuleLoadException(e);
            }
        }
        return moduleSpec;

    }
}