ClasspathModuleFinder.java

/**
 * Copyright 2015 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.URISyntaxException;

import org.jboss.modules.Environment;
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.ModuleXmlParserBridge;
import org.jboss.modules.ResourceLoader;
import org.wildfly.swarm.bootstrap.util.Layout;

/**
 * @author Bob McWhirter
 */
public class ClasspathModuleFinder implements ModuleFinder {

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

        try {
            ClassLoader cl = Layout.getInstance().getBootstrapClassLoader();
            InputStream in = cl.getResourceAsStream(path);

            if (in == null && cl != ClasspathModuleFinder.class.getClassLoader()) {
                in = ClasspathModuleFinder.class.getClassLoader().getResourceAsStream(path);
            }

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

            ModuleSpec moduleSpec = null;
            try {
                moduleSpec = ModuleXmlParserBridge.parseModuleXml(new ModuleXmlParserBridge.ResourceRootFactoryBridge() {
                    @Override
                    public ResourceLoader createResourceLoader(final String rootPath, final String loaderPath, final String loaderName) throws IOException {
                        return Environment.getModuleResourceLoader(rootPath, loaderPath, loaderName);
                    }
                }, "/", in, path.toString(), delegateLoader, identifier);

            } catch (IOException e) {
                throw new ModuleLoadException(e);
            } finally {
                try {
                    in.close();
                } catch (IOException e) {
                    throw new ModuleLoadException(e);
                }
            }
            return moduleSpec;
        } catch (IOException e) {
            throw new ModuleLoadException(e);
        } catch (URISyntaxException e) {
            throw new ModuleLoadException(e);
        }

    }
}