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/*
 * Copyright (c) 2022, 2023 Contributors to the Eclipse Foundation.
 * Copyright (c) 2006, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.internal.deployment;

import com.sun.enterprise.module.HK2Module;
import com.sun.enterprise.module.ModuleDefinition;
import com.sun.enterprise.module.ModulesRegistry;

import jakarta.inject.Inject;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.StartDocument;
import javax.xml.stream.events.XMLEvent;

import org.glassfish.api.container.Sniffer;
import org.glassfish.api.deployment.DeploymentContext;
import org.glassfish.api.deployment.archive.ArchiveType;
import org.glassfish.api.deployment.archive.ReadableArchive;
import org.glassfish.hk2.api.ServiceLocator;

/**
 * Generic implementation of the Sniffer service that can be programmatically instantiated
 *
 * @author Jerome Dochez, Sanjeeb Sahoo
 */
public abstract class GenericSniffer implements Sniffer {

    @Inject
    protected ModulesRegistry modulesRegistry;

    @Inject
    protected ServiceLocator habitat;

    final private String containerName;
    final private String appStigma;
    final private String urlPattern;

    final private static XMLInputFactory xmlInputFactory = XMLInputFactory.newFactory();
    private HK2Module[] modules;

    public GenericSniffer(String containerName, String appStigma, String urlPattern) {
        this.containerName = containerName;
        this.appStigma = appStigma;
        this.urlPattern = urlPattern;
    }

    /**
     * Returns true if the passed file or directory is recognized by this
     * composite sniffer.
     * @param context deployment context
     * @return true if the location is recognized by this sniffer
     */
    @Override
    public boolean handles(DeploymentContext context) {
        ArchiveType archiveType = habitat.getService(ArchiveType.class, context.getArchiveHandler().getArchiveType());
        if (archiveType != null && !supportsArchiveType(archiveType)) {
            return false;
        }
        return handles(context.getSource());
    }

    /**
     * Returns the list of annotation names that this sniffer is interested in.
     * If an application bundle contains at least one class annotated with
     * one of the returned annotations, the deployment process will not
     * call the handles method but will invoke the containers deployers as if
     * the handles method had been called and returned true.
     *
     * @param context deployment context
     * @return list of annotations this sniffer is interested in or an empty array
     */
    @Override
    public String[] getAnnotationNames(DeploymentContext context) {
        List annotationNames = new ArrayList<>();
        for (Class annotationType : getAnnotationTypes())  {
            annotationNames.add(annotationType.getName());
        }
        return annotationNames.toArray(new String[annotationNames.size()]);
    }

    /**
     * Returns true if the passed file or directory is recognized by this
     * instance.
     *
     * @param location the file or directory to explore
     * @return true if this sniffer handles this application type
     */
    @Override
    public boolean handles(ReadableArchive location) {
        if (appStigma != null) {
            try {
                if (location.exists(appStigma)) {
                    return true;
                }
            } catch (IOException e) {
                // ignore
            }
        }
        return false;
    }

    /**
     * Returns the pattern to apply against the request URL
     * If the pattern matches the URL, the service method of the associated
     * container will be invoked
     *
     * @return pattern instance
     */
    @Override
    public String[] getURLPatterns() {
        if (urlPattern!=null) {
            return new String[] {urlPattern};
        } else {
            return null;
        }
    }

    /**
     * Returns the container name associated with this sniffer.
     * 

* WARNING: This is different from {@link ArchiveType}! * * @return the container name */ @Override public String getModuleType() { return containerName; } /** * Sets up the container libraries so that any imported bundle from the * connector jar file will now be known to the module subsystem * * This method returns a {@link ModuleDefinition} for the module containing * the core implementation of the container. That means that this module * will be locked as long as there is at least one module loaded in the * associated container. * * @param containerHome is where the container implementation resides (Not used anymore) * @param logger the logger to use * @return the module definition of the core container implementation. * * @throws java.io.IOException exception if something goes sour */ @Override public synchronized HK2Module[] setup(String containerHome, Logger logger) throws IOException { // TODO(Sahoo): Change signature to not accept containerHome or logger if (modules != null) { if (logger.isLoggable(Level.FINE)) { logger.logp(Level.FINE, "GenericSniffer", "setup", "{0} has already setup {1} container, so just returning.", new Object[]{this, containerName}); } return modules; } List tmp = new ArrayList<>(); for (String moduleName : getContainerModuleNames()) { HK2Module m = modulesRegistry.makeModuleFor(moduleName, null); if (m != null) { tmp.add(m); } else { throw new RuntimeException("Unable to set up module " + moduleName); } } modules = tmp.toArray(new HK2Module[tmp.size()]); return modules; } protected String[] getContainerModuleNames() { return new String[0]; } /** * Tears down a container, remove all imported libraries from the module * subsystem. * */ @Override public void tearDown() { // It is not safe to uninstall modules in a running server as there might be existing // references to objects loaded from those modules, so we don't uninstall modules at this point of time. } /** * Returns the list of annotations types that this sniffer is interested in. * If an application bundle contains at least one class annotated with * one of the returned annotations, the deployment process will not * call the handles method but will invoke the containers deployers as if * the handles method had been called and returned true. * * @return list of annotations this sniffer is interested in. */ @Override public Class[] getAnnotationTypes() { return new Class[0]; } /** * @return false */ @Override public boolean isUserVisible() { return false; } /** * @return false */ @Override public boolean isJakartaEE() { return false; } @Override public boolean equals(Object other) { if (other instanceof Sniffer) { Sniffer otherSniffer = (Sniffer)other; return getModuleType().equals(otherSniffer.getModuleType()); } return false; } @Override public int hashCode() { int hash = 5; hash = 71 * hash + (getModuleType() != null ? getModuleType().hashCode() : 0); return hash; } /** * Returns a map of deployment configurations composed by reading from a * list of paths in the readable archive. (For Jakarta EE applications the * deployment configurations correspond to the deployment descriptors.) The * {@link #getDeploymentConfigurationPaths} method returns this list of paths * which might exist in archives that this sniffer handles. *

* In each returned map entry the key is a path and the value is the * contents of the archive entry at that path. This method creates a map * entry only if the path exists in the readable archive. *

* Sniffers for applications that do not store their configurations as * deployment descriptors at predictable paths within an archive are free * to override this implementation to return whatever information is * appropriate to that application type. A key usage of the returned * Map is in the application type's GUI plug-in (if desired) to allow * users to customize the deployment configuration after the application * has been deployed. The concrete Sniffer implementation and the * GUI plug-in must agree on the conventions for storing deployment * configuration inforation in the Map. * * @param location the readable archive for the application of interest * @return a map from path names to the contents of the archive entries * at those paths * @throws java.io.IOException in case of errors retrieving an entry or * reading the archive contents at an entry */ @Override public Map getDeploymentConfigurations(final ReadableArchive location) throws IOException { final Map deploymentConfigs = new HashMap<>(); for (String path : getDeploymentConfigurationPaths()) { InputStream is = null; try { is = location.getEntry(path); if (is != null) { String dc = readDeploymentConfig(is); deploymentConfigs.put(path, dc); } } finally { if (is != null) { is.close(); } } } return deploymentConfigs; } /** * Returns a list of paths within an archive that represents deployment * configuration files. *

* Sniffers that recognize Jakarta EE applications typically override this * default implementation to return a list of the deployment descriptors * that might appear in the type of Jakarta EE application which the sniffer * recognizes. For example, the WebSniffer implementation of this method * returns WEB-INF/web.xml, WEB-INF/glassfish-web.xml and * WEB-INF/sun-web.xml. * * @return list of paths in the archive where deployment configuration * archive entries might exist */ protected List getDeploymentConfigurationPaths() { return Collections.EMPTY_LIST; } /** * @return the set of the sniffers that should not co-exist for the * same module. For example, ejb and appclient sniffers should not * be returned in the sniffer list for a certain module. * This method will be used to validate and filter the retrieved sniffer * lists for a certain module * */ @Override public String[] getIncompatibleSnifferTypes() { return null; } private String readDeploymentConfig(final InputStream is) throws IOException { String encoding = null; XMLEventReader rdr = null; try { is.mark(Integer.MAX_VALUE); rdr = xmlInputFactory.createXMLEventReader( new InputStreamReader(is)); while (rdr.hasNext()) { final XMLEvent ev = rdr.nextEvent(); if (ev.isStartDocument()) { final StartDocument sd = (StartDocument) ev; encoding = sd.getCharacterEncodingScheme(); break; } } } catch (XMLStreamException e) { if (rdr != null) { try { rdr.close(); } catch (XMLStreamException inner) { throw new IOException(e); } } throw new IOException(e); } if (encoding == null) { encoding = "UTF-8"; } is.reset(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); int bytesRead; final byte [] buffer = new byte[1024]; while (( bytesRead = is.read(buffer)) != -1 ) { baos.write(buffer, 0, bytesRead); } try { rdr.close(); } catch (XMLStreamException ex) { throw new IOException(ex); } is.close(); return new String(baos.toByteArray(), encoding); } }





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