Merged all the AVM mapping files into one medium file. I find it easier to follow.

Purged the pointless FileContentFactory class.  If everything else were working file reading
and writing would now work.  Various other cleanups and some richer internal documentation.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@2904 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/FileContent.java

@@ -17,11 +17,15 @@
 
 package org.alfresco.repo.avm;
 
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.util.Formatter;
 
 import org.alfresco.error.AlfrescoRuntimeException;
 import org.alfresco.repo.avm.hibernate.ContentBean;
@@ -38,6 +42,16 @@ public class FileContent
      */
     private ContentBean fData;
     
+    /**
+     * The name of the file.
+     */
+    private String fName;
+    
+    /**
+     * The directory path of the file.
+     */
+    private String fPath;
+    
     /**
      * Make one from a bean.
      * @param data The Bean with the data.
@@ -45,6 +59,7 @@ public class FileContent
     public FileContent(ContentBean data)
     {
         fData = data;
+        
     }
     
     /**
@@ -54,6 +69,17 @@ public class FileContent
     public FileContent(SuperRepository superRepo)
     {
         fData = new ContentBeanImpl(superRepo.issueContentID());
+        BufferedOutputStream out = new BufferedOutputStream(getOutputStream(superRepo));
+        // Make an empty file.
+        try
+        {
+            out.close();
+        }
+        catch (IOException ie)
+        {
+            throw new AlfrescoRuntimeException("Couldn't close file.", ie);
+        }
+        superRepo.getSession().save(fData);
     }
     
     /**
@@ -64,7 +90,25 @@ public class FileContent
     public FileContent(FileContent other, SuperRepository superRepo)
     {
         fData = new ContentBeanImpl(superRepo.issueContentID());
-        // TODO Something.
+        // Copy the contents from other to this.
+        BufferedInputStream in = new BufferedInputStream(other.getInputStream(superRepo));
+        BufferedOutputStream out = new BufferedOutputStream(this.getOutputStream(superRepo));
+        try
+        {
+            byte [] buff = new byte[4096];  // Nyah, nyah.
+            int bytesRead;
+            while ((bytesRead = in.read(buff)) != -1)
+            {
+                out.write(buff, 0, bytesRead);
+            }
+            out.close();
+            in.close();
+        }
+        catch (IOException ie)
+        {
+            throw new AlfrescoRuntimeException("I/O failure in Copy on Write.", ie);
+        }
+        superRepo.getSession().save(fData);
     }
 
     /**
@@ -92,8 +136,14 @@ public class FileContent
      */
     public InputStream getInputStream(SuperRepository superRepo)
     {
-        // TODO Something.
-        return null;
+        try
+        {
+            return new FileInputStream(getContentPath(superRepo));
+        }
+        catch (IOException ie)
+        {
+            throw new AlfrescoRuntimeException("Could not open for reading: " + getContentPath(superRepo), ie);
+        }
     }
 
     /**
@@ -103,8 +153,19 @@ public class FileContent
      */
     public OutputStream getOutputStream(SuperRepository superRepo)
     {
-        // TODO Something.
-        return null;
+        try
+        {
+            File dir = new File(getDirectoryPath(superRepo));
+            if (!dir.exists())
+            {
+                dir.mkdirs();
+            }
+            return new FileOutputStream(getContentPath(superRepo));
+        }
+        catch (IOException ie)
+        {
+            throw new AlfrescoRuntimeException("Could not open for writing: " + getContentPath(superRepo), ie);
+        }
     }
 
     /**
@@ -115,4 +176,51 @@ public class FileContent
     {
         return fData;
     }
+    
+    /**
+     * Retrieve the full path for this content. 
+     * @param superRepo
+     * @return The full path for this content.
+     */
+    private String getContentPath(SuperRepository superRepo)
+    {
+        if (fName == null)
+        {
+            calcPathData(superRepo);
+        }
+        return fName;
+    }
+    
+    /**
+     * Get the directory path for this content.
+     * @param superRepo
+     * @return The directory path.
+     */
+    private String getDirectoryPath(SuperRepository superRepo)
+    {
+        if (fPath == null)
+        {
+            calcPathData(superRepo);
+        }
+        return fPath;
+    }
+    
+    /**
+     * Calculate the path data.
+     */
+    private void calcPathData(SuperRepository superRepo)
+    {
+        long id = fData.getId();
+        Formatter form = new Formatter(new StringBuilder());
+        form.format("%016x", id);
+        String name = form.toString();
+        form = new Formatter(new StringBuilder());
+        form.format("/%02x/%02x/%02x", 
+                    (id & 0xff000000) >> 24,
+                    (id & 0xff0000) >> 16,
+                    (id & 0xff00) >> 8);
+        String dir = form.toString();
+        fPath = superRepo.getStorageRoot() + dir;
+        fName = fPath + "/" + name;
+    }
 }