DPML Notify

[mcconnell at BerliOS <mcconnell AT mail.berlios.de>]

Author: mcconnell
Date: 2006-02-04 17:34:39 +0100 (Sat, 04 Feb 2006)
New Revision: 1018

Added:
   trunk/main/metro/model/src/main/net/dpml/metro/data/ArrayDirective.java
   
trunk/main/metro/model/src/main/net/dpml/metro/data/ArrayDirectiveBeanInfo.java
Log:
add array directive

Added: trunk/main/metro/model/src/main/net/dpml/metro/data/ArrayDirective.java
===================================================================
--- trunk/main/metro/model/src/main/net/dpml/metro/data/ArrayDirective.java   
  2006-02-04 05:58:00 UTC (rev 1017)
+++ trunk/main/metro/model/src/main/net/dpml/metro/data/ArrayDirective.java   
  2006-02-04 16:34:39 UTC (rev 1018)
@@ -0,0 +1,232 @@
+/*
+ * Copyright 2004-2005 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.metro.data;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.lang.reflect.Array;
+import java.util.Map;
+import java.util.Arrays;
+
+import net.dpml.transit.Value;
+import net.dpml.transit.Construct;
+
+import net.dpml.part.Directive;
+
+/**
+ * @author <a href="@PUBLISHER-URL@">@PUBLISHER-NAME@</a>
+ * @version @PROJECT-VERSION@
+ */
+public final class ArrayDirective implements Directive, Value
+{
+    
//--------------------------------------------------------------------------
+    // static
+    
//--------------------------------------------------------------------------
+
+   /**
+    * Serial version identifier.
+    */
+    static final long serialVersionUID = 1L;
+    
+    
//--------------------------------------------------------------------------
+    // state
+    
//--------------------------------------------------------------------------
+
+    private final String m_classname;
+    private final Value[] m_values;
+    
+    
//--------------------------------------------------------------------------
+    // constructors
+    
//--------------------------------------------------------------------------
+   /**
+    * Create a new array directive.
+    *
+    * @param classname the array type
+    * @param values the construct values
+    */
+    public ArrayDirective( String classname, Value[] values )
+    {
+        if( null == classname )
+        {
+            m_classname = Object.class.getName();
+        }
+        else
+        {
+            m_classname = classname;
+        }
+        
+        m_values = values;
+    }
+    
+    
//--------------------------------------------------------------------------
+    // ArrayDirective
+    
//--------------------------------------------------------------------------
+
+    public String getClassname()
+    {
+        return m_classname;
+    }
+    
+    public Value[] getValues()
+    {
+        return m_values;
+    }
+    
+    
//--------------------------------------------------------------------------
+    // Value
+    
//--------------------------------------------------------------------------
+    
+   /**
+    * Resolve an instance from the value using the context classloader.
+    * @return the resolved instance
+    * @exception Exception if error occurs during instance resolution
+    */
+    public Object resolve() throws Exception
+    {
+        return resolve( null, false );
+    }
+    
+   /**
+    * Resolve an instance from the value using a supplied context map. If 
any 
+    * target expressions in immediate or nested values contain a symbolic
+    * expression the value will be resolved using the supplied map.
+    *
+    * @param map the context map
+    * @return the resolved instance
+    * @exception Exception if error occurs during instance resolution
+    */
+    public Object resolve( Map map ) throws Exception
+    {
+        return resolve( map, false );
+    }
+
+   /**
+    * Resolve an instance from the value using a supplied isolvation policy. 
+    *
+    * @param isolate the isolation policy
+    * @return the resolved instance
+    * @exception Exception if error occurs during instance resolution
+    */
+    public Object resolve( boolean isolate ) throws Exception
+    {
+        return resolve( null, isolate );
+    }
+
+   /**
+    * Resolve an instance from the value using a supplied context map. If 
any 
+    * target expressions in immediate or nested values contain a symbolic
+    * expression the value will be resolved using the supplied map.
+    *
+    * @param map the context map
+    * @param isolate the isolation policy
+    * @return the resolved instance
+    * @exception Exception if error occurs during instance resolution
+    */
+    public Object resolve( Map map, boolean isolate ) throws Exception
+    {
+        ClassLoader loader = Thread.currentThread().getContextClassLoader();
+        Class c = loader.loadClass( m_classname );
+        Object[] instances = (Object[]) Array.newInstance( c, 
m_values.length );
+        for( int i=0; i<m_values.length; i++ )
+        {
+            Value value = m_values[i];
+            instances[i] = value.resolve( map, isolate );
+        }
+        return instances;
+    }
+    
+    
//--------------------------------------------------------------------------
+    // Object
+    
//--------------------------------------------------------------------------
+
+   /**
+    * Test if the supplied object is equal to this object.
+    * @param other the object to compare with this instance
+    * @return TRUE if the supplied object is equal to this object
+    */
+    public boolean equals( Object other )
+    {
+        if( null == other )
+        {
+            return false;
+        }
+        if( !( other instanceof ArrayDirective ) )
+        {
+            return false;
+        }
+        else
+        {
+            ArrayDirective directive = (ArrayDirective) other;
+            if( !m_classname.equals( directive.m_classname ) )
+            {
+                return false;
+            }
+            else
+            {
+                return Arrays.equals( m_values, directive.m_values );
+            }
+        }
+    }
+    
+   /**
+    * Return the hashcode for the instance.
+    * @return the instance hashcode
+    */
+    public int hashCode()
+    {
+        int hash = m_classname.hashCode();
+        for( int i=0; i<m_values.length; i++ )
+        {
+            hash ^= m_values[i].hashCode();
+        }
+        return hash;
+    }
+    
+    
//--------------------------------------------------------------------------
+    // Part
+    
//--------------------------------------------------------------------------
+
+   /**
+    * Return the part handler uri.
+    * @return the uri of the part handler
+    */
+    public URI getPartHandlerURI()
+    {
+        return PART_HANDLER_URI;
+    }
+
+    private static final URI PART_HANDLER_URI = setupURI( 
"@PART-HANDLER-URI@" );
+
+   /**
+    * Internal utility to create a static uri.
+    * @param spec the uri spec
+    * @return the uri
+    */
+    protected static URI setupURI( String spec )
+    {
+        try
+        {
+            return new URI( spec );
+        }
+        catch( URISyntaxException ioe )
+        {
+            return null;
+        }
+    }
+}

Added: 
trunk/main/metro/model/src/main/net/dpml/metro/data/ArrayDirectiveBeanInfo.java
===================================================================
--- 
trunk/main/metro/model/src/main/net/dpml/metro/data/ArrayDirectiveBeanInfo.java
     2006-02-04 05:58:00 UTC (rev 1017)
+++ 
trunk/main/metro/model/src/main/net/dpml/metro/data/ArrayDirectiveBeanInfo.java
     2006-02-04 16:34:39 UTC (rev 1018)
@@ -0,0 +1,73 @@
+/*
+ * Copyright 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.metro.data;
+
+import java.beans.SimpleBeanInfo;
+import java.beans.BeanDescriptor;
+import java.beans.DefaultPersistenceDelegate;
+import java.beans.Encoder;
+import java.beans.Expression;
+
+/**
+ * BeanInfo for the ContextDescriptor class that declares a persistence
+ * delegate.
+ *
+ * @author <a href="@PUBLISHER-URL@">@PUBLISHER-NAME@</a>
+ * @version @PROJECT-VERSION@
+ */
+public final class ArrayDirectiveBeanInfo extends SimpleBeanInfo
+{
+    private static final BeanDescriptor BEAN_DESCRIPTOR = 
setupBeanDescriptor();
+    
+   /**
+    * Return the bean descriptor.
+    * @return the descriptor
+    */
+    public BeanDescriptor getBeanDescriptor()
+    {
+        return BEAN_DESCRIPTOR;
+    }
+    
+    private static BeanDescriptor setupBeanDescriptor()
+    {
+        BeanDescriptor descriptor = new BeanDescriptor( ArrayDirective.class 
);
+        descriptor.setValue( 
+          "persistenceDelegate", 
+          new ArrayDirectivePersistenceDelegate() );
+        return descriptor;
+    }
+    
+   /**
+    * Persistence delegate implementation.
+    */
+    private static class ArrayDirectivePersistenceDelegate extends 
DefaultPersistenceDelegate
+    {
+       /**
+        * Return the expression value.
+        * @param old the old instance
+        * @param encoder the encoder
+        * @return the expression
+        */
+        public Expression instantiate( Object old, Encoder encoder )
+        {
+            ArrayDirective construct = (ArrayDirective) old;
+            Object[] args = new Object[2];
+            args[0] = construct.getClassname();
+            args[1] = construct.getValues();
+            return new Expression( old, old.getClass(), "new", args );
+        }
+    }
+}