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 *
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 *
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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 */

package org.glassfish.web.sniffer;

import org.glassfish.api.deployment.archive.ReadableArchive;
import org.glassfish.api.deployment.archive.ArchiveType;
import org.glassfish.api.deployment.DeploymentContext;
import org.glassfish.deployment.common.DeploymentUtils;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.internal.deployment.GenericSniffer;
import org.glassfish.web.WarType;
import javax.inject.Inject;

import org.jvnet.hk2.annotations.Service;
import javax.inject.Singleton;

import java.util.ArrayList;
import java.util.List;



/**
 * Implementation of the Sniffer for the web container.
 * 
 * @author Jerome Dochez
 */
@Service(name="web")
@Singleton
public class WebSniffer  extends GenericSniffer {

    @Inject WarType warType;
    @Inject ServiceLocator locator;

    public WebSniffer() {
        super("web", "WEB-INF/web.xml", null);
    }

    @Override
    public String[] getURLPatterns() {
        // anything finishing with jsp or jspx
        return new String[] { "*.jsp", "*.jspx" };
    }

    /**
     * Returns true if the passed file or directory is recognized by this
     * 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 DeploymentUtils.isArchiveOfType(context.getSource(), warType, context, locator);
    }

    /**
     * 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) {
        return DeploymentUtils.isArchiveOfType(location, warType, locator);
    }

    private static final String[] containers = { "com.sun.enterprise.web.WebContainer" };

    public String[] getContainersNames() {
        return containers;
    }

    /**
     * @return whether this sniffer should be visible to user
     *
     */
    public boolean isUserVisible() {
        return true;
    }

    /**
     * @return whether this sniffer represents a Java EE container type
     *
     */
    public boolean isJavaEE() {
        return true;
    }
    
    private static final List deploymentConfigurationPaths = 
            initDeploymentConfigurationPaths();
    
    private static List initDeploymentConfigurationPaths() {
        final List result = new ArrayList();
        result.add("WEB-INF/web.xml");
        result.add("WEB-INF/sun-web.xml");
        result.add("WEB-INF/glassfish-web.xml");
        result.add("WEB-INF/weblogic.xml");
        return result;
    }
    
    /**
     * Returns the web-oriented descriptor paths that might exist in a web
     * app.
     * 
     * @return list of the deployment descriptor paths
     */
    @Override
    protected List getDeploymentConfigurationPaths() {
        return deploymentConfigurationPaths;
    }

    /**
     * @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
     *
     */
    public String[] getIncompatibleSnifferTypes() {
        return new String[] {"connector"};
    }

    /**
     *
     * This API is used to help determine if the sniffer should recognize
     * the current archive.
     * If the sniffer does not support the archive type associated with
     * the current deployment, the sniffer should not recognize the archive.
     *
     * @param archiveType the archive type to check
     * @return whether the sniffer supports the archive type
     *
     */
    public boolean supportsArchiveType(ArchiveType archiveType) {
        if (archiveType.equals(warType)) {
            return true;
        }
        return false;
    }
    
    // TODO(Sahoo): Ideally we should have separate sniffer for JSP, but since WebSniffer is already
    // handling JSPs, we must make sure that all JSP related modules get installed by WebSniffer as well.
    private String[] containerModuleNames = {"org.glassfish.main.web.glue",
            "org.glassfish.web.javax.servlet.jsp"
    };

    @Override
    protected String[] getContainerModuleNames() {
        return containerModuleNames;
    }

}