DPML Notify

[mcconnell AT dpml.net]

Author: mcconnell AT dpml.net
Date: Fri Jun 17 08:43:01 2005
New Revision: 2867

Added:
   
development/main/metro/composition/part/src/main/net/dpml/composition/part/CompositionContentHandlerModel.java
   
development/main/metro/composition/part/src/main/net/dpml/composition/part/CompositionContentHandlerStorageUnit.java
Log:
add content handler model and home

Added: 
development/main/metro/composition/part/src/main/net/dpml/composition/part/CompositionContentHandlerModel.java
==============================================================================
--- (empty file)
+++ 
development/main/metro/composition/part/src/main/net/dpml/composition/part/CompositionContentHandlerModel.java
      Fri Jun 17 08:43:01 2005
@@ -0,0 +1,266 @@
+/*
+ * Copyright (c) 2005 Stephen J. McConnell
+ *
+ * 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 net.dpml.composition.part;
+
+import java.io.File;
+import java.net.URI;
+import java.rmi.RemoteException;
+import java.util.Date;
+import java.util.Map;
+import java.util.EventObject;
+import java.util.EventListener;
+import java.util.WeakHashMap;
+import java.util.Properties;
+import java.util.prefs.Preferences;
+import java.util.prefs.PreferenceChangeListener;
+import java.util.prefs.PreferenceChangeEvent;
+
+import net.dpml.composition.event.WeakEventProducer;
+
+import net.dpml.parts.control.ControllerContext;
+import net.dpml.parts.control.ControllerContextListener;
+import net.dpml.parts.control.ControllerContextEvent;
+
+import net.dpml.transit.home.ContentHome;
+import net.dpml.transit.model.ContentRegistryModel;
+import net.dpml.transit.model.DefaultContentModel;
+import net.dpml.transit.model.Logger;
+import net.dpml.transit.util.PropertyResolver;
+
+
+/**
+ * The ControllerContext is a management service supplied to a controller 
instance. It 
+ * provides support for operations though which the context state may be 
updated and 
+ * a provision for default values based on underlying preferences.
+ *
+ * @author <a href="mailto:dev-dpml AT lists.ibiblio.org";>The Digital Product 
Meta Library</a>
+ * @version $Revision: 1.2 $ $Date: 2004/03/17 10:30:09 $
+ */
+public class CompositionContentHandlerModel extends DefaultContentModel 
implements ControllerContext
+{
+    
//----------------------------------------------------------------------------
+    // state
+    
//----------------------------------------------------------------------------
+
+    private Preferences m_preferences;
+    
+    private File m_work;
+  
+    private File m_temp;
+
+    private Map m_listeners = new WeakHashMap();
+
+   /**
+    * Internal synchronization lock.
+    */
+    protected final Object m_lock = new Object();
+
+    
//----------------------------------------------------------------------------
+    // constructor
+    
//----------------------------------------------------------------------------
+
+    public CompositionContentHandlerModel( 
+       Logger logger, Date creation, ContentHome home, 
+       URI uri, String type, String title, String work, String temp ) throws 
RemoteException
+    {
+        super( logger, creation, home, uri, type, title );
+        m_work = getWorkingDirectory( work );
+        m_temp = getTempDirectory( temp );
+    }
+
+    
//----------------------------------------------------------------------------
+    // ControllerContext
+    
//----------------------------------------------------------------------------
+
+   /**
+    * Return the context uri.
+    *
+    * @return the uri for this context.
+    */
+    public URI getURI() throws RemoteException
+    {
+        return CONTEXT_URI;
+    }
+
+   /**
+    * Return the root working directory.
+    *
+    * @return directory representing the root of the working directory 
hierachy
+    */
+    public File getWorkingDirectory() throws RemoteException
+    {
+        synchronized( m_work )
+        {
+            return m_work;
+        }
+    }
+
+   /**
+    * Return the root temporary directory.
+    *
+    * @return directory representing the root of the temporary directory 
hierachy.
+    */
+    public File getTempDirectory() throws RemoteException
+    {
+        synchronized( m_temp )
+        {
+            return m_temp;
+        }
+    }
+
+   /**
+    * Add the supplied controller context listener to the controller 
context.  A 
+    * controller implementation should not maintain strong references to 
supplied 
+    * listeners.
+    *
+    * @param listener the controller context listener to add
+    */
+    public void addControllerContextlistener( ControllerContextListener 
listener ) 
+      throws RemoteException
+    {
+        addListener( listener );
+    }
+
+   /**
+    * Remove the supplied controller context listener from the controller 
context.
+    *
+    * @param listener the controller context listener to remove
+    */
+    public void removeControllerContextlistener( ControllerContextListener 
listener )
+      throws RemoteException
+    {
+        removeListener( listener );
+    }
+
+    
//----------------------------------------------------------------------------
+    // private
+    
//----------------------------------------------------------------------------
+
+    protected void processEvent( EventObject event )
+    {
+        if( event instanceof WorkingDirectoryChangeEvent )
+        {
+            processWorkingDirectoryChangeEvent( 
(WorkingDirectoryChangeEvent) event );
+        }
+        else if( event instanceof TempDirectoryChangeEvent )
+        {
+            processTempDirectoryChangeEvent( (TempDirectoryChangeEvent) 
event );
+        }
+        else
+        {
+            super.processEvent( event );
+        }
+    }
+
+    public void processWorkingDirectoryChangeEvent( 
WorkingDirectoryChangeEvent event )
+    {
+        EventListener[] listeners = super.listeners();
+        for( int i=0; i<listeners.length; i++ )
+        {
+            EventListener eventListener = listeners[i];
+            if( eventListener instanceof ControllerContextListener )
+            {
+                ControllerContextListener listener = 
(ControllerContextListener) eventListener;
+                try
+                {
+                    listener.workingDirectoryChanged( event );
+                }
+                catch( Throwable e )
+                {
+                    final String error =
+                      "ControllerContextListener working dir change 
notification error.";
+                    getLogger().error( error, e );
+                }
+            }
+        }
+    }
+
+    public void processTempDirectoryChangeEvent( TempDirectoryChangeEvent 
event )
+    {
+        EventListener[] listeners = super.listeners();
+        for( int i=0; i<listeners.length; i++ )
+        {
+            EventListener eventListener = listeners[i];
+            if( eventListener instanceof ControllerContextListener )
+            {
+                ControllerContextListener listener = 
(ControllerContextListener) eventListener;
+                try
+                {
+                    listener.tempDirectoryChanged( event );
+                }
+                catch( Throwable e )
+                {
+                    final String error =
+                      "ControllerContextListener temp dir change 
notification error.";
+                    getLogger().error( error, e );
+                }
+            }
+        }
+    }
+
+    private File getWorkingDirectory( String value )
+    {
+        Properties properties = System.getProperties();
+        String path = PropertyResolver.resolve( properties, value );
+        return new File( path );
+    }
+
+    private File getTempDirectory( String value )
+    {
+        Properties properties = System.getProperties();
+        String path = PropertyResolver.resolve( properties, value );
+        return new File( path );
+    }
+
+    
//----------------------------------------------------------------------------
+    // static (private)
+    
//----------------------------------------------------------------------------
+
+    private static URI CONTEXT_URI = setupContextURI();
+
+    private static URI setupContextURI()
+    {
+        try
+        {
+            return new URI( "metro:local" );
+        }
+        catch( Throwable e )
+        {
+            return null;
+        }
+    }
+
+    static class WorkingDirectoryChangeEvent extends ControllerContextEvent
+    {
+        public WorkingDirectoryChangeEvent( 
+          CompositionContentHandlerModel source, File oldDir, File newDir )
+        {
+            super( source, oldDir, newDir );
+        }
+    }
+
+    static class TempDirectoryChangeEvent extends ControllerContextEvent
+    {
+        public TempDirectoryChangeEvent( 
+          CompositionContentHandlerModel source, File oldDir, File newDir )
+        {
+            super( source, oldDir, newDir );
+        }
+    }
+}

Added: 
development/main/metro/composition/part/src/main/net/dpml/composition/part/CompositionContentHandlerStorageUnit.java
==============================================================================
--- (empty file)
+++ 
development/main/metro/composition/part/src/main/net/dpml/composition/part/CompositionContentHandlerStorageUnit.java
        Fri Jun 17 08:43:01 2005
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2005 Stephen J. McConnell
+ *
+ * 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 net.dpml.composition.part;
+
+import java.io.File;
+import java.net.URI;
+import java.rmi.RemoteException;
+import java.util.Date;
+import java.util.prefs.Preferences;
+
+import net.dpml.transit.model.Logger;
+import net.dpml.transit.model.ContentModel;
+import net.dpml.transit.unit.ContentStorageUnit;
+import net.dpml.transit.unit.BuilderException;
+
+/**
+ * The ControllerContext is a management service supplied to a controller 
instance. It 
+ * provides support for operations though which the context state may be 
updated and 
+ * a provision for default values based on underlying preferences.
+ *
+ * @author <a href="mailto:dev-dpml AT lists.ibiblio.org";>The Digital Product 
Meta Library</a>
+ * @version $Revision: 1.2 $ $Date: 2004/03/17 10:30:09 $
+ */
+public class CompositionContentHandlerStorageUnit extends ContentStorageUnit
+{
+    
//----------------------------------------------------------------------------
+    // state
+    
//----------------------------------------------------------------------------
+
+    private final ContentModel m_model;
+    
+    private String m_work;
+  
+    private String m_temp;
+
+    
//----------------------------------------------------------------------------
+    // constructor
+    
//----------------------------------------------------------------------------
+
+   /**
+    * Creation of a new CompositionContentHandlerStorageUnit using a 
supplied 
+    * preferences node.
+    *
+    * @param prefs the preferences node assigned to the storage unit from 
which default
+    *   values may be resolved
+    */
+    public CompositionContentHandlerStorageUnit( 
+      Preferences prefs, Logger logger, Date creation, Boolean policy )
+    {
+        super( prefs, logger, creation, policy.booleanValue() );
+        m_model = createContentModel();
+    }
+
+    
//----------------------------------------------------------------------------
+    // ContentStorageUnit
+    
//----------------------------------------------------------------------------
+
+    protected ContentModel createContentModel()
+    {
+        Preferences prefs = getPreferences();
+        Logger logger = getLogger();
+        Date creation = getCreationDate();
+        URI uri = getCodeBaseURI();
+        String type = getType();
+        String title = getTitle();
+        String work = getWorkingDirectory();
+        String temp = getTempDirectory();
+        try
+        {
+            return new CompositionContentHandlerModel( 
+              logger, creation, this, uri, type, title, work, temp );
+        }
+        catch( RemoteException e )
+        {
+            final String error = 
+              "Unable to construct part content model due to a remote 
exception.";
+            throw new BuilderException( error, e );
+        }
+    }
+
+    
//----------------------------------------------------------------------------
+    // impl
+    
//----------------------------------------------------------------------------
+
+
+    private String getWorkingDirectory()
+    {
+        Preferences prefs = getPreferences();
+        return prefs.get( "working-directory", "${user.dir}" );
+    }
+
+    private String getTempDirectory()
+    {
+        Preferences prefs = getPreferences();
+        return prefs.get( "temp-directory", "${java.temp.dir}" );
+    }
+}