DPML Notify

[mcconnell AT dpml.net]

Author: mcconnell AT dpml.net
Date: Sun Jun  5 18:13:26 2005
New Revision: 2728

Added:
   
development/main/transit/core/handler/src/main/net/dpml/transit/builder/AbstractStorageHome.java
Log:


Added: 
development/main/transit/core/handler/src/main/net/dpml/transit/builder/AbstractStorageHome.java
==============================================================================
--- (empty file)
+++ 
development/main/transit/core/handler/src/main/net/dpml/transit/builder/AbstractStorageHome.java
    Sun Jun  5 18:13:26 2005
@@ -0,0 +1,174 @@
+/*
+ * Copyright 2005 Stephen 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.transit.builder;
+
+import java.io.IOException;
+import java.net.URL;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.MalformedURLException;
+import java.util.Date;
+import java.util.prefs.Preferences;
+import java.util.prefs.BackingStoreException;
+
+import net.dpml.transit.model.Logger;
+
+/**
+ * Utility class that provides support for the creation of URI and URL
+ * values from preference attributes.
+ */
+class AbstractStorageHome
+{
+    private Preferences m_prefs;
+    private boolean m_policy;
+    private Logger m_logger;
+    private Date m_creation;
+
+    public AbstractStorageHome( Preferences prefs, Logger logger, Date 
creation, boolean policy )
+    {
+        m_prefs = prefs;
+        m_policy = policy;
+        m_creation = creation;
+        m_logger = logger;
+    }
+
+    public boolean getStoragePolicy()
+    {
+        return m_policy;
+    }
+
+    public Preferences getPreferences()
+    {
+        return m_prefs;
+    }
+
+    public Date getCreationDate()
+    {
+        return m_creation;
+    }
+
+    public Logger getLogger()
+    {
+        return m_logger;
+    }
+
+    public URI getURI( String key ) throws BuilderException
+    {
+        Preferences prefs = getPreferences();
+        String path = prefs.get( key, null );
+        try
+        {
+            if( null == path )
+            {
+                return null;
+            }
+            else
+            {
+                return new URI( path );
+            }
+        } 
+        catch( URISyntaxException e )
+        {
+            final String error = 
+              "Invalid URI attribute value."
+              + "\nPreferences: " + prefs
+              + "\nAttribute: " + key
+              + "\nValue: " + path;
+            throw new BuilderException( error, e );
+        }
+        catch( Throwable e )
+        {
+            final String error = 
+              "Unexpected error while attempting to construct a uri."
+              + "\nPreferences: " + prefs
+              + "\nAttribute: " + key
+              + "\nValue: " + path;
+            throw new BuilderException( error, e );
+        }
+    }
+
+    public void setURI( String key, URI uri )
+    {
+        if( null == uri )
+        {
+            getPreferences().remove( key );
+        }
+        else
+        {
+            String ascii = uri.toASCIIString();
+            getPreferences().put( key, ascii );
+        }
+    }
+
+    public URL getURL( String key ) throws BuilderException
+    {
+        Preferences prefs = getPreferences();
+        String path = prefs.get( key, null );
+        try
+        {
+            if( null == path )
+            {
+                return null;
+            }
+            else
+            {
+                return new URL( path );
+            }
+        } 
+        catch( MalformedURLException e )
+        {
+            final String error = 
+              "Invalid URL attribute value."
+              + "\nPreferences: " + prefs
+              + "\nAttribute: " + key
+              + "\nValue: " + path;
+            throw new BuilderException( error, e );
+        }
+        catch( Throwable e )
+        {
+            final String error = 
+              "Unexpected error while attempting to construct url."
+              + "\nPreferences: " + prefs
+              + "\nAttribute: " + key
+              + "\nValue: " + path;
+            throw new BuilderException( error, e );
+        }
+    }
+
+    public void setURL( String key, URL url )
+    {
+        if( null == url )
+        {
+            getPreferences().remove( key );
+        }
+        else
+        {
+            try
+            {
+                String path = url.toString();
+                URI uri = new URI( path );
+                String ascii = uri.toASCIIString();
+                getPreferences().put( key, ascii );
+            }
+            catch( Exception e )
+            {
+                getPreferences().put( key, url.toString() );
+            }
+        }
+    }
+}
+