Package org.jboss.deployers.vfs.plugins.structure.war

Source Code of org.jboss.deployers.vfs.plugins.structure.war.WARStructure

/*
* JBoss, Home of Professional Open Source
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.deployers.vfs.plugins.structure.war;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.jboss.deployers.spi.DeploymentException;
import org.jboss.deployers.spi.structure.ContextInfo;
import org.jboss.deployers.spi.structure.MetaDataType;
import org.jboss.deployers.vfs.plugins.structure.AbstractVFSArchiveStructureDeployer;
import org.jboss.deployers.vfs.spi.structure.StructureContext;
import org.jboss.vfs.VirtualFile;
import org.jboss.vfs.VirtualFileFilter;
import org.jboss.vfs.VisitorAttributes;
import org.jboss.vfs.util.automount.Automounter;
import org.jboss.vfs.util.SuffixMatchFilter;

/**
* WARStructure.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @author <a href="ales.justin@jboss.com">Ales Justin</a>
* @version $Revision: 83811 $
*/
public class WARStructure extends AbstractVFSArchiveStructureDeployer
{
   /** The default filter which allows jars/jar directories */
   public static final VirtualFileFilter DEFAULT_WEB_INF_LIB_FILTER = new SuffixMatchFilter(".jar", VisitorAttributes.DEFAULT);

   /** The WEB-INF/lib filter */
   private VirtualFileFilter webInfLibFilter = DEFAULT_WEB_INF_LIB_FILTER;

   /** The WEB-INF/lib/[some-archive]/META-INF filter */
   private VirtualFileFilter webInfLibMetaDataFilter;

   /** Whether to include web-inf in the classpath */
   private boolean includeWebInfInClasspath;

   /**
    * Sets the default relative order 1000.
    *
    */
   public WARStructure()
   {
      setRelativeOrder(1000);
   }

   /**
    * Get the webInfLibFilter.
    *
    * @return the webInfLibFilter.
    */
   public VirtualFileFilter getWebInfLibFilter()
   {
      return webInfLibFilter;
   }

   /**
    * Set the webInfLibFilter.
    *
    * @param webInfLibFilter the webInfLibFilter.
    * @throws IllegalArgumentException for a null filter
    */
   public void setWebInfLibFilter(VirtualFileFilter webInfLibFilter)
   {
      if (webInfLibFilter == null)
         throw new IllegalArgumentException("Null filter");
      this.webInfLibFilter = webInfLibFilter;
   }

   /**
    * Get webInfLibMetaDataFilter
    *
    * @return the webInfLibMetaDataFilter
    */
   public VirtualFileFilter getWebInfLibMetaDataFilter()
   {
      return webInfLibMetaDataFilter;
   }

   /**
    * Set the webInfLibMetaDataFilter.
    *
    * @param webInfLibMetaDataFilter the webInfLibFilter.
    */
   public void setWebInfLibMetaDataFilter(VirtualFileFilter webInfLibMetaDataFilter)
   {
      this.webInfLibMetaDataFilter = webInfLibMetaDataFilter;
   }

   /**
    * Should we include web-inf in classpath.
    *
    * @param includeWebInfInClasspath the include web-inf flag
    */
   public void setIncludeWebInfInClasspath(boolean includeWebInfInClasspath)
   {
      this.includeWebInfInClasspath = includeWebInfInClasspath;
   }

   @Override
   protected boolean hasValidSuffix(String name)
   {
      return name.endsWith(".war");
   }

   public boolean doDetermineStructure(StructureContext structureContext) throws DeploymentException
   {
      ContextInfo context = null;
      VirtualFile file = structureContext.getFile();
      try
      {
         boolean trace = log.isTraceEnabled();

         // the WEB-INF
         VirtualFile webinf = null;
        
         // We require either a WEB-INF or the name ends in .war
         if (hasValidSuffix(file.getName()) == false)
         {
           webinf = file.getChild("WEB-INF");
           if (webinf.exists())
           {
              if (trace)
                 log.trace("... ok - directory has a WEB-INF subdirectory");
           }
           else
           {
              if (trace)
                 log.trace("... no - doesn't look like a war and no WEB-INF subdirectory.");
              return false;
           }
         }
         else if (trace)
         {
            log.trace("... ok - name ends in .war.");
         }

         List<String> metaDataLocations = new ArrayList<String>();
         metaDataLocations.add("WEB-INF");

         // Check for WEB-INF/classes
         VirtualFile classes = file.getChild("WEB-INF/classes");

         // Check for a META-INF for metadata
         if (classes.exists())
            metaDataLocations.add("WEB-INF/classes/META-INF");

         // Create a context for this war file and all its metadata locations
         context = createContext(structureContext, metaDataLocations.toArray(new String[metaDataLocations.size()]));

         // Check for jars in WEB-INF/lib
         List<VirtualFile> archives = null;
         try
         {
            VirtualFile webinfLib = file.getChild("WEB-INF/lib");
            if (webinfLib.exists())
            {
               archives = webinfLib.getChildren(webInfLibFilter);
               // Add the jars' META-INF for metadata
               for (VirtualFile jar : archives)
               {
                  // either same as plain lib filter, null or accepts the jar
                  if (webInfLibMetaDataFilter == null || webInfLibMetaDataFilter == webInfLibFilter || webInfLibMetaDataFilter.accepts(jar))
                     addMetaDataPath(structureContext, context, "WEB-INF/lib/" + jar.getName() + "/META-INF", MetaDataType.ALTERNATIVE);
               }
            }
         }
         catch (IOException e)
         {
            log.warn("Exception looking for WEB-INF/lib, " + file.getPathName() + ", " + e);
         }

         // Add the war manifest classpath entries
         addClassPath(structureContext, file, false, true, context);

         // Add WEB-INF/classes if present
         if (classes != null)
            addClassPath(structureContext, classes, true, false, context);
         else if (trace)
            log.trace("No WEB-INF/classes for: " + file.getPathName());

         // and the top level jars in WEB-INF/lib
         if (archives != null)
         {
            for (VirtualFile jar : archives)
            {
               Automounter.mount(file, jar);
               addClassPath(structureContext, jar, true, true, context);
            }
         }
         else if (trace)
         {
            log.trace("No WEB-INF/lib for: " + file.getPathName());
         }

         // do we include WEB-INF in classpath
         if (includeWebInfInClasspath && webinf != null)
         {
            addClassPath(structureContext, webinf, true, false, context);
         }

         // There are no subdeployments for wars
         return true;
      }
      catch (Exception e)
      {
         // Remove the invalid context
         if (context != null)
            structureContext.removeChild(context);

         throw DeploymentException.rethrowAsDeploymentException("Error determining structure: " + file.getName(), e);
      }
   }
}
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