First sweep of aspect manager.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269098 13f79535-47bb-0310-9956-ffa450edef68

proposal/myrmidon/src/java/org/apache/myrmidon/components/aspect/AspectManager.java

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+/*
+ * Copyright (C) The Apache Software Foundation. All rights reserved.
+ *
+ * This software is published under the terms of the Apache Software License
+ * version 1.1, a copy of which has been included with this distribution in
+ * the LICENSE file.
+ */
+package org.apache.myrmidon.components.aspect;
+
+import org.apache.myrmidon.aspects.AspectHandler;
+import org.apache.avalon.framework.component.Component;
+
+/**
+ * Manage and propogate Aspects.
+ *
+ * @author <a href="mailto:donaldp@apache.org">Peter Donald</a>
+ */
+public interface AspectManager
+    extends Component, AspectHandler
+{
+    String ROLE = "org.apache.myrmidon.components.aspect.AspectManager";
+
+    void addAspectHandler( AspectHandler handler );
+    void removeAspectHandler( AspectHandler handler );
+}

proposal/myrmidon/src/java/org/apache/myrmidon/components/aspect/DefaultAspectManager.java

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+/*
+ * Copyright (C) The Apache Software Foundation. All rights reserved.
+ *
+ * This software is published under the terms of the Apache Software License
+ * version 1.1, a copy of which has been included with this distribution in
+ * the LICENSE file.
+ */
+package org.apache.myrmidon.components.aspect;
+
+import java.util.ArrayList;
+import org.apache.avalon.framework.configuration.Configuration;
+import org.apache.log.Logger;
+import org.apache.myrmidon.api.Task;
+import org.apache.myrmidon.api.TaskException;
+import org.apache.myrmidon.aspects.AspectHandler;
+
+/**
+ * Manage and propogate Aspects.
+ *
+ * @author <a href="mailto:donaldp@apache.org">Peter Donald</a>
+ */
+public class DefaultAspectManager
+    implements AspectManager
+{
+    private ArrayList            m_aspectCopy  = new ArrayList();
+    private AspectHandler[]      m_aspects     = new AspectHandler[ 0 ];
+
+    public synchronized void addAspectHandler( final AspectHandler handler )
+    {
+        m_aspectCopy.add( handler );
+        m_aspects = (AspectHandler[])m_aspectCopy.toArray( m_aspects );
+    }
+
+    public synchronized void removeAspectHandler( final AspectHandler handler )
+    {
+        m_aspectCopy.remove( handler );
+        m_aspects = (AspectHandler[])m_aspectCopy.toArray( m_aspects );
+    }
+
+    public Configuration preCreate( final Configuration configuration )
+        throws TaskException
+    {
+        Configuration model = configuration;
+
+        final AspectHandler[] aspects = m_aspects;
+        for( int i = 0; i < aspects.length; i++ )
+        {
+            model = aspects[ i ].preCreate( model );
+        }
+
+        return model;
+    }
+
+    public void postCreate( final Task task )
+        throws TaskException
+    {
+        final AspectHandler[] aspects = m_aspects;
+        for( int i = 0; i < aspects.length; i++ )
+        {
+            aspects[ i ].postCreate( task );
+        }
+    }
+
+    public void preLoggable( final Logger logger )
+        throws TaskException
+    {
+        final AspectHandler[] aspects = m_aspects;
+        for( int i = 0; i < aspects.length; i++ )
+        {
+            aspects[ i ].preLoggable( logger );
+        }
+    }
+
+    public void preConfigure()
+        throws TaskException
+    {
+        final AspectHandler[] aspects = m_aspects;
+        for( int i = 0; i < aspects.length; i++ )
+        {
+            aspects[ i ].preConfigure();
+        }
+    }
+
+    public void preExecute()
+        throws TaskException
+    {
+        final AspectHandler[] aspects = m_aspects;
+        for( int i = 0; i < aspects.length; i++ )
+        {
+            aspects[ i ].preExecute();
+        }
+    }
+
+    public void preDestroy()
+        throws TaskException
+    {
+        final AspectHandler[] aspects = m_aspects;
+        for( int i = 0; i < aspects.length; i++ )
+        {
+            aspects[ i ].preDestroy();
+        }
+    }
+
+    public boolean error( final TaskException te )
+        throws TaskException
+    {
+        final AspectHandler[] aspects = m_aspects;
+        for( int i = 0; i < aspects.length; i++ )
+        {
+            if( true == aspects[ i ].error( te ) )
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}